(19)
(11)EP 3 011 369 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
11.12.2019 Bulletin 2019/50

(21)Application number: 14814398.5

(22)Date of filing:  16.06.2014
(51)International Patent Classification (IPC): 
E21B 21/06(2006.01)
G01N 24/08(2006.01)
G01N 33/28(2006.01)
G01V 3/00(2006.01)
G01V 3/32(2006.01)
(86)International application number:
PCT/IL2014/050544
(87)International publication number:
WO 2014/203245 (24.12.2014 Gazette  2014/52)

(54)

AN NMR/MRI-BASED INTEGRATED SYSTEM FOR ANALYZING AND TREATING OF A DRILLING MUD FOR DRILLING MUD RECYCLING PROCESS AND METHODS THEREOF

INTEGRIERTES SYSTEM AUF NMR/MRI-BASIS ZUR ANALYSE UND BEHANDLUNG VON BOHRSCHLAMM FÜR EIN RECYCLING-VERFAHREN FÜR BOHRSCHLAMM UND VERFAHREN DAFÜR

SYSTÈME INTÉGRÉ À BASE DE RMN/IRM POUR UNE ANALYSE ET UN TRAITEMENT D'UNE BOUE DE FORAGE POUR UN PROCESSUS DE RECYCLAGE DE BOUE DE FORAGE ET PROCÉDÉS ASSOCIÉS


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 20.06.2013 US 201361837205 P
10.10.2013 US 201361889113 P

(43)Date of publication of application:
27.04.2016 Bulletin 2016/17

(73)Proprietor: Aspect International (2015) Private Limited
Singapore 01981 (SG)

(72)Inventor:
  • RAPOPORT, Uri
    73115 Moshav Ben Shemen (IL)

(74)Representative: Pearl Cohen Zedek Latzer Baratz UK LLP 
The Gridiron Building One Pancras Square
London N1C 4AG
London N1C 4AG (GB)


(56)References cited: : 
WO-A1-2013/009299
US-A- 5 532 593
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US-A1- 2005 030 020
US-A1- 2008 189 456
US-A1- 2012 013 335
US-A1- 2013 060 474
US-B1- 6 646 437
US-A- 5 023 551
US-A- 5 696 448
US-A1- 2004 090 230
US-A1- 2008 136 409
US-A1- 2012 013 335
US-A1- 2012 077 707
US-B1- 6 215 304
  
  • P Coussot ET AL: "Rheological Behavior of Drilling Muds, Characterization Using MRI Visualization INTRODUCTION", Oil & Gas Science and Technology - Rev. IFP Oil & Gas Science and Technology - Rev. IFP, 1 January 2004 (2004-01-01), pages 23-29, XP055301951, Retrieved from the Internet: URL:http://ogst.ifpenergiesnouvelles.fr/ar ticles/ogst/pdf/2004/01/coussot_vol59n1.pd f
  • SHADDAY ET AL.: 'Recommendations for Rheological Testing and Modeling of DWPF Melter Feed Slurries (U' TECHNICAL ASSISTANCE REQUEST NUMBER: 94-DWPT-PMC-A0003 08 August 1994, pages 3 , 27 - 29 , 37-39, XP055301949 Retrieved from the Internet: <URL:https://inis.iaea.org/search/search.as px orig_q=RN:26021403> [retrieved on 2014-12-15]
  • COUSSOT ET AL.: 'Rheological behavior of drilling muds, characterization using MRI visualization' OIL & GAS SCI. TECH. vol. 59, 2009, pages 23 - 29, XP055301951
  
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


Description

Field of the invention



[0001] The present invention generally pertains to (i) an NMR/MRI-based integrated system and to (ii) an NMR/MRI-based and at least one non-NMR/MRI- analysis means integrated system for analyzing and treating of a drilling mud for drilling mud recycling process and to feedbacked methods thereof. The invention also related to means and both physical and chemical methods of analyzing drilled products and for analyzing engineering-related parameters of the drilling.

Background of the invention



[0002] We were learning form Coussot et al., Oil & Gas Science and Technology - Rev. IFP, Vol. 59 (2004), No. 1, pp. 23-29, that drilling muds are very complex fluids used to drill oil wells; their functions are various: to carry the rock cuttings to the surface, to maintain a sufficient pressure against the rock formation, to lubricate and cool the bit. There are a few families of drilling muds: oil based muds (invert emulsion of brine into an oil phase with various additives) and water based muds (aqueous solutions of clays and polymers). Originally prepared from produced oil, oil based muds formulations have evolved to very complex compositions of various additives. The base oil may be of various nature, and additives are very complex: water droplets, surfactants, organophilic clays, viscosifyers, various solids and others. These additives give specific properties to the mud, particularly regarding rheological properties. Drilling muds are often described as thixotropic shear thinning fluids with a yield stress. Due to their complex composition, drilling muds exhibit an internal structure which is liable to modify according to the flowing and shear conditions, which may lead to non-homogenous phenomena. It is therefore important to develop investigation techniques allowing visualizing the internal structure of the fluid in parallel to rheological measurements.

[0003] Coussot et al further presented rheological experiments coupled to magnetic resonance imaging (MRI). Using this technique, they have determined the velocity profile in a viscometric flow.

[0004] Coussot et al did not disclose or taught use of MRI in returning mud treatment, as be disclosed below.

[0005] More about the aforesaid drilling muds: water-based mud (WBM) is a most basic water-based mud system begins with water, then clays and other chemicals are incorporated into the water to create a homogenous blend resembling something between chocolate milk and a malt (depending on viscosity). The clay (called "shale" in its rock form) is usually a combination of native clays that are suspended in the fluid while drilling, or specific types of clay that are processed and sold as additives for the WBM system. The most common of these is bentonite, frequently referred to in the oilfield as "gel". Gel likely makes reference to the fact that while the fluid is being pumped, it can be very thin and free-flowing (like chocolate milk), though when pumping is stopped, the static fluid builds a "gel" structure that resists flow. When an adequate pumping force is applied to "break the gel", flow resumes and the fluid returns to its previously free-flowing state. Many other chemicals (e.g. potassium formate) are added to a WBM system to achieve various effects, including: viscosity control, shale stability, enhance drilling rate of penetration, cooling and lubricating of equipment. Oil-based mud (OBM) can be a mud where the base fluid is a petroleum product such as diesel fuel. Oil-based muds are used for many reasons, some being increased lubricity, enhanced shale inhibition, and greater cleaning abilities with less viscosity. Oil-based muds also withstand greater heat without breaking down. The use of oil-based muds has special considerations. These include cost, environmental considerations such as disposal of cuttings in an appropriate place to isolate possible environmental contamination and the exploratory disadvantages of using oil based mud, especially in wildcat wells due inability to analyze oil shows in cuttings, because the oil based mud has fluorescence confusing with the original oil of formation. Therefore induces contamination of cuttings samples, cores, sidewall cores for geochemical analysis of TOC and masks the real determination of API gravity due to this contamination. Synthetic-based fluid (SBM) is a mud where the base fluid is a synthetic oil. This is most often used on offshore rigs because it has the properties of an oil-based mud, but the toxicity of the fluid fumes are much less than an oil-based fluid.

[0006] On a drilling rig, mud is pumped from the mud pits through the drill string where it sprays out of nozzles on the drill bit, cleaning and cooling the drill bit in the process. The mud then carries the crushed or cut rock ("cuttings") up the annular space ("annulus") between the drill string and the sides of the hole being drilled, up through the surface casing, where it emerges back at the surface. Cuttings are then filtered out with either a shale shaker, or the newer shale conveyor technology, and the mud returns to the mud pits. The mud pits let the drilled "fines" settle; the pits are also where the fluid is treated by adding chemicals and other substances.

[0007] The returning mud can contain natural gases or other flammable materials which will collect in and around the shale shaker/conveyor area or in other work areas. Because of the risk of a fire or an explosion if they ignite, special monitoring sensors and explosion-proof certified equipment is commonly installed, and workers are advised to take safety precautions. The mud is then pumped back down the hole and further re-circulated. After testing, the mud is treated periodically in the mud pits to ensure properties which optimize and improve drilling efficiency, borehole stability, and other requirements listed below.

[0008] Drilling muds are classified based on their fluid phase, alkalinity, dispersion and the type of chemicals used. Dispersed systems are Freshwater mud - Low pH mud (7.0-9.5) that includes spud, bentonite, natural, phosphate treated muds, organic mud and organic colloid treated mud. High pH mud example alkaline tannate treated muds are above 9.5 in pH. Water based drilling mud that represses hydration and dispersion of clay - There are 4 types: high pH lime muds, low pH gypsum, seawater and saturated salt water muds. Non-dispersed systems are low solids mud - These muds contain less than 3-6% solids by volume and weight less than 9.5 lbs/gal. Most muds of this type are water-based with varying quantities of bentonite and a polymer. Emulsions usually selected from oil in water (oil emulsion muds) and water in oil (invert oil emulsion muds). Oil based muds contain oil as the continuous phase and water as a contaminant, and not an element in the design of the mud. They typically contain less than 5% (by volume) water. Oil-based muds are usually a mixture of diesel fuel and asphalt, however can be based on produced crude oil and mud, see M.G. Prammer, E. Drack, G. et al. 2001. The Magnetic-Resonance While-Drilling Tool: Theory and Operation, SPE Reservoir Evaluation & Engineering 4(4) 72495-PA.

[0009] US6268726 to Numar Corporation, named "Method and apparatus for nuclear magnetic resonance measuring while drilling" ('726) discloses an NMR measurement-while-drilling tool having the mechanical strength and measurement sensitivity to perform NMR measurements of an earth formation while drilling a borehole, and a method and apparatus for monitoring the motion of the measuring tool in order to take this motion into account when processing NMR signals from the borehole. US '726 further discloses an apparatus wherein its tool has a permanent magnet with a magnetic field direction substantially perpendicular to the axis of the borehole, a steel collar of a non-magnetic material surrounding the magnet, antenna positioned outside the collar, and a soft magnetic material positioned in a predetermined relationship with the collar and the magnet that helps to shape the magnetic field of the tool. Due to the non-magnetic collar, the tool can withstand the extreme conditions in the borehole environment while the borehole is being drilled. Motion management apparatus and method are employed to identify time periods when the NMR measurements can be taken without the accuracy of the measurement being affected by the motion of the tool or its spatial orientation.

[0010] Other patents directed to practical NMR measurements while drilling are U.S. Pat. No. 5,705,927 issued Jan. 6, 1998, to Sezginer et al.; U.S. Pat. No. 5,557,201 issued Sep. 17, 1996, to Kleinberg et al.; and U.S. Pat. No. 5,280,243 issued Jan. 18, 1994, to Miller; US6362619 and US8373412, US8,143,887 "Apparatus and method for real time and real flow-rate measurement of multiphase fluids with MRI" by Shell Oil Company (Houston, TX, herein after '887).

[0011] An MRI/NMR-based means and methods for real-time in-vivo rheology measurements of drilling muds, especially for optimizing the recycling conditions and treatment of the mud, including continuous, one-step on-line measurement of mud-related parameters is still a long felt need. Moreover, such measuring system for defining mud characteristics, such as its fluid phase, alkalinity, dispersion and the type of chemicals used to be further add is an unmet need, currently necessary for optimizing and improve drilling efficiency, borehole stability, and other requirements as stated above.

[0012] Attention is also directed to US2012013335 (A1) which discloses a method of determining a physiochemical property of a drilling fluid at a drilling site during a drilling phase, said method comprising detecting a nuclear magnetic resonance signal from out-of-hole drilling fluid at said site and calculating therefrom a value indicative of said property.

Summary of the invention



[0013] In one aspect the present invention provides a method of operating a system for analyzing and treating drilling mud, said system comprising a drilling mud recycling line comprising equipment configured to perform a process of recycling said drilling mud, a magnetic resonance imaging (MRI) device configured to provide at least one image of at least a portion of said drilling mud in said drilling mud recycling line, pressure sensors arranged to measure a radial pressure profile of drilling mud in said drilling mud recycling line, and a processor for analyzing and controlling the recycling of said drilling mud; said method comprising imaging at least a portion of a test sample of said drilling mud by means of said MRI device; generating standard quality parameter

from analysis of a standardized sample of said drilling-mud, said analysis of said standardized sample generating standardized stress parameters kS and nS in the power law equation σS(r)= kS[γS(r)]nS from rheological parameters standardized radial shear stress σS(r) and standardized radial shear rate parameter γS(r); measuring at least two radial pressure profiles of said test sample; analyzing said MRI image and said radial pressure profiles to derive rheological parameters radial shear stress σ(r) and radial shear rate γ(r) of said drilling mud; determining at least one drilling mud composition quality parameter

from analysis of said test sample of said drilling mud, said analysis generating drilling-mud stress parameters kc and nc in the power law equation σC(r)=kC[γC(r)]nC from said rheological parameters drilling-mud radial shear stress parameter σC(r) and drilling-mud shear rate parameter γC(r) communicating results of said analysis to said drilling mud recycling equipment; and controlling at least one step in the recycling of said drilling mud according to said results dependent on a comparison of QC to QS.

[0014] Drilling mud recycling steps may be selected from a group consisting of adding ingredients and raw materials, mixing, shaking, rotating, tumbling, aerating, heating, cooling, holding at a fixed temperature, emulsifying, adding water or water immiscible solutions, grinding, grounding, milling, shredding, pulvering, cutting, filtering, reducing particle size, de-emulsifying, kneading, decanting, setteling, destiling, decentering, vacuuming and any combination thereof.

[0015] At least one of the following may be being held true (a) said MRI-based means for analyzing at least one criterion, parameter, value or characteristic of the drilling mud generates at least one radial velocity profile from said at least one magnetic resonance image; (b) said means for analyzing criterion, parameter, value or characteristic of the drilling mud generates at least two radial pressure profiles; (c) said MRI means provides an MRI image having at least one criterion, parameter, value or characteristic related with said mud's characteristic selected from a group consisting of specific gravity, density, salinity, rheology parameters, particle size, radius and distribution thereof, particles shape, especially particles smoothness versus their roughness, ruggedness, gruffness, choppedness, roughness, granulation, raggedness, raucousness, rustication or scabrousness, water content, content of water-immiscible solutions, water to solvent ratio, and any combination thereof.

[0016] Means for analyzing at least one criterion, parameter, value or characteristic of the drilling mud may generate radial shear stress and radial shear stress rate from at least one of said at least one radial velocity profile and said at least two radial pressure profiles.

[0017] Means for analyzing at least one criterion of said drilling mud may generate stress parameters k and n in the power law equation σ(r)=k[γ(r)]n from rheological parameters radial shear stress parameter σ(r) and radial shear rate parameter γ(r).

[0018] A composition quality parameter

is generated from analysis of a sample of said drilling mud, said analysis of said sample generating composition stress parameters kc and nC in the power law equation σC(r)=kC[γC(r)]nC from rheological parameters composition radial shear stress parameter σC(r) and composition radial shear rate parameter γC(r).

[0019] A a quality test parameter may be defined as: QT = |QS - QC|.

[0020] A quality criterion may be: said quality test parameter is smaller than one standard deviation of said standard quality parameter.

[0021] The standard deviation may be one standard deviation of either said standard quality parameter or said composition quality parameter.

[0022] An alterable at least one parameter may be selected from a group consisting of addition of an ingredient, the rate of addition of an ingredient, mixing rate, mixing time, raw materials admixing rate, raw materials admixing time, rate of change of mixing rate, shaking rate, shaking time, rate of change of shaking rate, rotation rate, rotation time, rate of change of rotation rate, tumbling rate, tumbling time, rate of change of tumbling rate, aeration rate, aeration time, rate of change of aeration rate, cutting or milling time or rate, heating rate, heating time, rate of change of heating rate, shaking rate, shaking time, rate of change of heating rate, cooling rate, cooling time, rate of change of cooling rate, time held at a constant temperature, emulsification rate de-emulsification rate, emulsification time, de-emulsification time rate of change of emulsification rate, kneading rate, kneading time, rate of change of kneading rate, and any combination thereof.

[0023] An alterable at least one parameter may comprise addition of an ingredient; said ingredient stored in an said ingredient supply system comprising a plurality of ingredient supply reservoirs, each reservoir of said plurality of ingredient supply reservoirs comprising at least one ingredient of said plurality of ingredients.

[0024] Said MRI device may be connected with said drilling mud recycling line in one or more ways listed in a group consisting of in line connection, on line connection, next to line connection, side-by-side parallel connection, bypass connection and any combination thereof.

[0025] Said MRI device or devices may be connected with said drilling mud recycling line in one or more ways listed in a group consisting of single MRI device per drilling mud recycling line, a multiple MRI devices per drilling mud recycling line; either single or multiple manifolds of drilling mud recycling lines, wherein to at least one of said manifolds, either a single or multiple MRI devices are utilized;

[0026] At least one MRI device may be in direct connection with the drilling mud recycling line.

[0027] At least one MRI device may be in indirect connection with the drilling mud recycling line.

[0028] At least one MRI device may be in indirect connection with the drilling mud recycling line via at least one bypass of said drilling mud recycling line.

[0029] At least one MRI device may be in online connection with the drilling mud recycling line.

[0030] At least one MRI device may be in offline connection with the drilling mud recycling line.

[0031] At least one MRI device may be in connection with more than one drilling mud at least one MRI device is in connection with two or more different steps of a single drilling mud recycling lines.

[0032] The MRI device may provide time-resolved images of the mud drilling mud recycling lines.

[0033] Recycled drilling mud of at least one first drilling may be further utilized in said at least one first drilling.

[0034] Recycled drilling mud of at least one first drilling may be further utilized in at least one second drilling, said first and said second drillings are different drillings.

[0035] The MRI device may provide "an optimal drilling mud" standard.

[0036] There is also disclosed in the following a system of analyzing drilling parameters, operative in a method, which is not part of the present invention, which comprises, inter alia, steps as follows: at least one step of imaging and timing a series of NMR/MRI images of drilling mud before mud's re-used in a drilling hole (Tinflux); either continuously or batch-wise flowing said time-resolved imaged drilling mud within said drilling hole whilst drilling said hole; after flowing period, i.e., time length between drilling mud influx and its outflow out from the hole, at least one step of imaging and timing a series of NMR/MRI images of drilling mud after the use in a drilling hole (Toutflow); comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow); thereby defining the change of said parameter and analyzing parameters related with the drilling (debris shape and size, particle distribution and smoothness etc).

[0037] There is also disclosed in the following a system of analyzing drilled product, operative in a method, which is not part of the present invention, which comprises, inter alia, steps as follows: at least one step of imaging and timing a series of NMR/MRI images of drilling mud before mud's re-used in a drilling hole (Tinflux); either continuously or batch-wise flowing said time-resolved imaged drilling mud within said drilling hole whilst drilling said hole, thereby providing said drilling mud as a flowing carrier of the drilled product (such as solid ground, earth samples, water oil, gas, ores, coal etc.), after flowing period, i.e., time length between drilling mud influx and its outflow out from the hole, at least one step of imaging and timing a series of NMR/MRI images of drilling mud after the use in a drilling hole (Toutflow); and comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow); thereby defining the change of said parameter and analyzing said drilled product.

[0038] There is also disclosed in the following an NMR/MRI-based integrated method for analyzing and treating of a drilling mud in drilling mud recycling process comprising, inter alia, steps as follows: providing a system comprising: drilling mud recycling equipment; an NMR/MRI device configured to provide at least one image of at least a portion of said drilling mud at said at least one characterized recycling step; and a processor for analyzing and controlling the recycling of said drilling mud; analyzing said NMR/MRI image online; operatively communicating results of said analysis to said drilling mud recycling equipment; and online feedback controlling at least one step in the recycling of said drilling mud recycling equipment, thereby controlling automatically said at least one step in the recycling of said drilling mud recycling.

[0039] The method may additionally comprise at least one step selected from a group consisting of (a) selecting said drilling mud recycling steps from a group consisting adding ingredients and raw materials, mixing, shaking, rotating, tumbling, aerating, heating, cooling, holding at a fixed temperature, emulsifying, adding water or water immiscible solutions, grinding, grounding, milling, shredding, pulvering, cutting, filtering, reducing particle size, de-emulsifying, kneading, decanting, setteling, destiling, decentering, vacuuming, and any combination thereof; (b) determining a standardized drilling-mud quality parameter, said standardized quality parameter determined from said analysis of said at least one sample of said at least one standardized composition of said drilling-mud; (c) determining a quality criterion from said analysis of said at least one sample of said at least one standardized composition of said drilling-mud; (e) analyzing said composition of said drilling-mud to generate at least one radial velocity profile of said composition of said drilling-mud from said at least one magnetic resonance image; and any combination thereof; and (d) providing an NMR/MRI image having at least one criterion, parameter, value or characteristic related with said mud's characteristic selected from a group consisting of specific gravity, density, salinity, rheology parameters, particle size, radius and distribution thereof, particles shape, especially particles smoothness versus their roughness, ruggedness, gruffness, roughness, granulation, raggedness, raucousness, rustication or scabrousness, water content, content of water-immiscible solutions, water to solvent ratio, and any combination thereof.

[0040] The method additionally comprises a step of generating at least two radial pressure profiles of said composition of said drilling-mud.

[0041] The method additionally comprises a step generating at least one rheological parameter of said composition of said drilling-mud from at least one of said at least one radial velocity profile and said at least two radial pressure profiles.

[0042] The method additionally comprises at least one step selected from a group consisting of (a) selecting said at least one rheological parameter from a group consisting of radial shear stress parameter σ(r), radial shear rate parameter γ(r), and any combination of thereof; (b) generating stress parameters k and n in the power law equation σ(r) = k[γ(r)]n from rheological parameters radial shear stress parameter σ(r) and radial shear rate parameter γ(r); and any combination thereof.

[0043] The method additionally comprises a step of determining at least one quality parameter Q from said at least one rheological parameter.

[0044] The method additionally comprises a step of generating said quality parameter from



[0045] Another object of the invention is to disclose the system as defined in any of the above, wherein the method additionally comprises a step of generating standard quality parameter

from analysis of a standardized sample of said drilling-mud, said analysis of said standardized sample generating standardized stress parameters kS and nS in the power law equation σS(r) = kS[γS(r)]nS from rheological parameters standardized radial shear stress parameter σS(r) and standardized radial shear rate parameter γS(r).

[0046] Another object of the invention is to disclose the system as defined in any of the above, wherein the method additionally comprises a step of generating drilling-mud quality parameter

from analysis of a sample of said drilling-mud, said analysis of said drilling-mud sample generating drilling-mud stress parameters kC and nC in the power law equation σC(r)=kC[γC(r)]nC from rheological parameters drilling-mud radial shear stress parameter σC(r) and drilling-mud radial shear rate parameter γC(r).

[0047] The method may additionally comprise a step of generating quality test parameter QT = | QS - QC|.

[0048] The method may additionally comprise at least one step selected from a group consisting of (a) setting said quality criterion as: said quality test parameter is smaller than one standard deviation of said standard quality parameter; (b) setting said quality criterion as: said quality test parameter is smaller than one standard deviation of said drilling-mud quality parameter; and any combination thereof.

[0049] The method may additionally comprise a step of selecting said alterable at least one parameter from a group consisting of (a) selecting said drilling mud recycling steps from a group consisting adding ingredients and raw materials, mixing, shaking, rotating, tumbling, aerating, heating, cooling, holding at a fixed temperature, emulsifying, adding water or water immiscible solutions, grinding, grounding, milling, shredding, pulvering, cutting, filtering, reducing particle size, de-emulsifying, kneading, decanting, setteling, destiling, decentering, vacuuming, and any combination thereof; (b) determining a standardized drilling-mud quality parameter, said standardized quality parameter determined from said analysis of said at least one sample of said at least one standardized composition of said drilling-mud; (c) determining a quality criterion from said analysis of said at least one sample of said at least one standardized composition of said drilling-mud; (e) analyzing said composition of said drilling-mud to generate at least one radial velocity profile of said composition of said drilling-mud from said at least one magnetic resonance image; and any combination thereof.

[0050] The method may additionally comprise a step of selecting addition of an ingredient as at least one said alterable at least one parameter; said ingredient stored in an said ingredient supply system comprising a plurality of ingredient supply reservoirs, each reservoir of said plurality of ingredient supply reservoirs comprising at least one ingredient of said plurality of ingredients.

[0051] The method may additionally comprise at least one step of connecting said NMR/MRI device with said drilling mud recycling line in one or more ways listed in a group consisting of in line connection, on line connection, next to line connection, side-by-side parallel connection, bypass connection and any combination thereof.

[0052] The method may additionally comprise at least one step of connecting said NMR/MRI device or devices with said drilling mud recycling line in one or more ways listed in a group consisting of single NMR/MRI device per drilling mud recycling line, a multiple NMR/MRI devices per drilling mud recycling line; either single or multiple manifolds of drilling mud recycling lines, wherein to at least one of said manifolds, either a single or multiple NMR/MRI devices are utilized;
The method may additionally comprise at least one step of connecting said NMR/MRI device in direct connection with the drilling mud recycling line.

[0053] The method may additionally comprise at least one step of connecting said NMR/MRI device indirect connection with the drilling mud recycling line.

[0054] At least one NMR/MRI device may be in indirect connection with the drilling mud recycling line via at least one bypass of said drilling mud recycling line.

[0055] The method may additionally comprise at least one step of connecting said NMR/MRI device in online connection with the drilling mud recycling line.

[0056] The method may additionally comprise at least one step of connecting said NMR/MRI device offline connection with the drilling mud recycling line.

[0057] The method may additionally comprise at least one step of connecting said NMR/MRI device with more than one drilling mud recycling lines.

[0058] The method may additionally comprise at least one step of connecting said NMR/MRI device with two or more different steps of a single drilling mud recycling lines.

[0059] The method may additionally comprise at least one step of providing one or more time-resolved images of the mud drilling mud recycling lines.

[0060] The method may additionally comprise at least one step of imaging and timing a series of NMR/MRI images of drilling mud before mud's re-used in a drilling hole (Tinflux), and at least one step of imaging and timing a series of NMR/MRI images of drilling mud after the use in a drilling hole (Toutflow).

[0061] The method may additionally comprise at least one step of utilizing said NMR/MRI device of at least one first drilling in said at least one first drilling.

[0062] The method may additionally comprise at least one step of utilizing said NMR/MRI device of at least one first drilling in said at least one second drilling; said first and said second drillings are different drillings.

[0063] The method may additionally comprise standardizing "an optimal drilling mud".

[0064] There is also disclosed herein a method, not being part of the present invention, of analyzing drilling parameters, comprising, inter alia, steps as follows: at least one step of imaging and timing a series of NMR/MRI images of drilling mud before mud's re-used in a drilling hole (Tinflux); either continuously or batch-wise flowing said time-resolved imaged drilling mud within said drilling hole whilst drilling said hole; after flowing period, i.e., time length between drilling mud influx and its outflow out from the hole, at least one step of imaging and timing a series of NMR/MRI images of drilling mud after the use in a drilling hole (Toutflow); comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow); thereby defining the change of said parameter and analyzing parameters related with the drilling (debris shape and size, particle distribution and smoothness etc).

[0065] There is also disclosed herein a method, not forming part of the present invention, of analyzing drilled product, comprising at least one step of imaging and timing a series of NMR/MRI images of drilling mud before mud's re-used in a drilling hole (Tinflux); either continuously or batch-wise flowing said time-resolved imaged drilling mud within said drilling hole whilst drilling said hole, thereby providing said drilling mus as a flowing carrier of the drilled product (such as solid ground, earth samples, water oil, gas, ores, coal etc), after flowing period, i.e., time length between drilling mud influx and its outflow out from the hole, at least one step of imaging and timing a series of NMR/MRI images of drilling mud after the use in a drilling hole (Toutflow); and comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow); thereby defining the change of said parameter and analyzing said drilled product.

[0066] Said step of comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow) may further comprise measuring the relaxation time T1, T2 and diffusion coefficient D.

[0067] The system may be integrating (a) NMR, MRI and (b) non-magnetic analytical means.

[0068] The system may comprise analytical means to detect in real-time, non-invasively and/or non intrusionly (i.e., with no obstruction) one or more parameters selected from a group consisting of flow rate, density, water cut (water ratio), rheology, viscosity, particle sizing, salinity and any combination thereof.

[0069] There is also disclosed herein an NMR/MRI-based integrated method, not forming part of the present invention, for analyzing and treating of a drilling mud in drilling mud recycling process: providing a system comprising: drilling mud recycling equipment; an NMR/MRI device configured to provide at least one image of at least a portion of said drilling mud at said at least one characterized recycling step; non-magnetic (non-MRI/NMR) analysis means; and a processor for analyzing and controlling the recycling of said drilling mud; analyzing said NMR/MRI image online; by means of said non-magnetic analysis means, analyzing one or more parameters selected from a group consisting of flow rate, density, water cut (water ratio), rheology, viscosity, particle sizing, salinity and any combination thereof; operatively communicating results of said analysis to said drilling mud recycling equipment; and online feedback controlling at least one step in the recycling of said drilling mud recycling equipment, thereby controlling automatically said at least one step in the recycling of said drilling mud recycling.

[0070] There is also disclosed herein a method, not forming part of the present invention, of analyzing drilling parameters, comprising at least one step of imaging and timing a series of both (i) NMR/MRI images and (ii) non-magnetic (non-MRI/NMR) analysis means, of drilling mud before mud's re-used in a drilling hole (Tinflux); either continuously or batch-wise flowing said time-resolved imaged drilling mud within said drilling hole whilst drilling said hole; after flowing period, i.e., time length between drilling mud influx and its outflow out from the hole, at least one step of imaging and timing a series of NMR/MRI images of drilling mud after the use in a drilling hole (Toutflow); comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow); thereby defining the change of said parameter and analyzing parameters related with the drilling.

[0071] There is also disclosed herein a method, not forming part of the present invention, of analyzing drilled product, comprising at least one step of imaging and timing a series of both (i) NMR/MRI images and (ii) non-magnetic (non-MRI/NMR) analysis means, of drilling mud before mud's re-used in a drilling hole (Tinflux); either continuously or batch-wise flowing said time-resolved imaged drilling mud within said drilling hole whilst drilling said hole, thereby providing said drilling mus as a flowing carrier of the drilled product; after flowing period, i.e., time length between drilling mud influx and its outflow out from the hole, at least one step of imaging and timing a series of NMR/MRI images of drilling mud after the use in a drilling hole (Toutflow); and comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow); thereby defining the change of said parameter and analyzing said drilled product.

[0072] In the NMR/MRI-based integrated method for analyzing and treating of a drilling mud in drilling mud recycling process as defined in any of the above; the method may further comprise providing said system with one or more non-magnetic (non-MRI/NMR) analysis means.

[0073] In the NMR/MRI-based integrated method for analyzing and treating of a drilling mud in drilling mud recycling process as defined in any of the above; the method may further comprise steps of providing said system with one or more non-magnetic (non-MRI/NMR) analysis means; and by means of said non-magnetic analysis means, analyzing one or more parameters selected from a group consisting of flow rate, density, water cut (water ratio), rheology, viscosity, particle sizing, salinity and any combination thereof.

[0074] There is also disclosed in the following an NMR/MRI-based integrated method, not forming part of the present invention, for analyzing and treating of a drilling mud in drilling mud recycling process: providing a system comprising: drilling mud recycling equipment; an NMR/MRI device configured to provide at least one image of at least a portion of said drilling mud at said at least one characterized recycling step; non-magnetic (non-MRI/NMR) analysis means; and a processor for analyzing and controlling the recycling of said drilling mud; analyzing said NMR/MRI image online; by means of said non-magnetic analysis means, analyzing one or more parameters selected from a group consisting of flow rate, density, water cut (water ratio), rheology, viscosity, particle sizing, salinity and any combination thereof; operatively communicating results of said analysis to said drilling mud recycling equipment; and online feedback controlling at least one step in the recycling of said drilling mud recycling equipment, thereby controlling automatically said at least one step in the recycling of said drilling mud recycling.

[0075] There is also disclosed herein a method, not forming part of the present invention, of analyzing drilling parameters, comprising at least one step of imaging and timing a series of both (i) NMR/MRI images and (ii) non-magnetic (non-MRI/NMR) analysis means, of drilling mud before mud's re-used in a drilling hole (Tinflux); either continuously or batch-wise flowing said time-resolved imaged drilling mud within said drilling hole whilst drilling said hole; after flowing period, i.e., time length between drilling mud influx and its outflow out from the hole, at least one step of imaging and timing a series of NMR/MRI images of drilling mud after the use in a drilling hole (Toutflow); comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow); thereby defining the change of said parameter and analyzing parameters related with the drilling.

[0076] There is also disclosed herein a, not forming part of the present invention, of analyzing drilled product, comprising at least one step of imaging and timing a series of both (i) NMR/MRI images and (ii) non-magnetic (non-MRI/NMR) analysis means, of drilling mud before mud's re-used in a drilling hole (Tinflux); either continuously or batch-wise flowing said time-resolved imaged drilling mud within said drilling hole whilst drilling said hole, thereby providing said drilling mus as a flowing carrier of the drilled product; after flowing period, i.e., time length between drilling mud influx and its outflow out from the hole, at least one step of imaging and timing a series of NMR/MRI images of drilling mud after the use in a drilling hole (Toutflow); and comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow); thereby defining the change of said parameter and analyzing said drilled product.

BRIEF DESCRIPTION OF THE DRAWINGS



[0077] A preferred embodiment of the current invention is described hereinbelow with reference to the following drawings:

Fig. 1 shows a system for drilling mud recycling line, in accordance with a preferred embodiment of the present invention; and

Fig. 2 presents further details of drilling mud recycling line, in accordance with a preferred embodiment of the present invention.


DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS



[0078] The following description is provided, alongside all chapters of the present invention, so as to enable any person skilled in the art to make use of the invention and sets forth the best modes contemplated by the inventor of carrying out this invention. Various modifications, however, will remain apparent to those skilled in the art.

[0079] A recent development incorporated in the present invention is the integration of sensing devices and monitoring processes into the sampling system. The mechanism preferably adopted is the NeSSI (New Sensors/Sampling Initiative).

[0080] The NeSSI (New Sampling/Sensor Initiative) requirements fulfill the ANSI/ISA SP76.00.2002 miniature, modular mechanical standard and include mechanical systems associated with the fluid handling components. The ANSI/ISA standard is referenced by the International Electrotechnical Commission in publication IEC 62339-1:2006. Preferably, the food production line uses mechanical designs based on the ANSI/ISA SP76.00.02-2002 Standard.

[0081] The NeSSI platform is a miniaturized, modular version of traditional sample gathering and handling methodologies, thus permitting the addition of components as standard modules, and the integration of the sensing system with the sampling system to form a single stand-alone unit for sample extraction and measurement. Using the NeSSI platform, process corrections may be detected earlier in the food product production line, thereby minimizing defective food production and food wastage.

[0082] The Magnetic Resonance Device (MRD) of Aspect Imaging Ltd (IL and US) is typically useful for the drilling mud analysis, especially, as in the present invention, for managing ingredients. The MRD is a relatively small nuclear magnetic resonance device with about 1 Tesla magnetic field, on the order of 0.5 m X 0.5 m X 1 m in size. Thus, the MRD device is ideal for incorporating in an on-line system, especially, in the drilling mud recycling line.

[0083] The radial shear stress distribution σ(r) is determined from

where ΔP(r) is the pressure difference between entrance port 64 and exit port 66 of the MRD 26 at radial location r. Pressure sensors are located in proximity to the ports 64 and 66 and the pressure sensors measure an axial pressure profile P(r), as is known in the art. The pressure sensors are separated by a distance L.

[0084] The radial shear rate γ(r) distribution is determined from

where v(r) is the radial velocity profile 40.

[0085] The NMR images 38, the radial velocity profiles v(r) 40, the pressure profiles P(r), the distance L, and the rheological parameters σ(r) and γ(r) can be stored in the memory 44 and can be retrieved from memory as required.

[0086] According to a power law distribution for the radial shear stress σ(r), the radial shear stress σ(r) and the radial shear rate γ(r) are related:

where k and n are the power law stress parameters.

[0087] Typically, the parameters k and n are determined by fitting an averaged radial shear rate distribution γ(r) and an averaged shear stress distribution σ(r) for the radial values r to the power law distribution in equation (3).

[0088] A useful quality parameter, Q, is

where k and n are found by fitting the averaged radial shear rate distribution γ(r) and the averaged shear stress distribution σ(r) for the radial values r to the power law distribution in equation (3).

[0089] In this embodiment, a composition quality parameter, QC, is compared to a standard quality parameter, QS, where QC is

and Qs is



[0090] In order to determine whether the sample fulfills the criteria, a quality test parameter QT is compared to a check criterion δ and the sample is acceptable if



[0091] In one embodiment,

and the check criterion is one standard deviation of the standard quality parameter QS.

[0092] In embodiments where the check criterion δ is one standard deviation of the standard quality parameter QS, the standard quality parameter QS is measured for a plurality of standardized samples of the composition and a standard quality parameter QS,i is determined for each sample i. The standard deviation, Ds, of the standard quality parameter QS is found, as is known in the art, from the equation

where QS,i is the standard quality parameter for the ith standardized sample of the product, N is the number of standardized samples tested, and QS is the mean of the standard quality parameters QS,i,

[0093] In another embodiments, the check criterion is two standard deviations (95%) of the standard quality parameter QS. In yet other embodiments, 3 or 4 standard deviations, or even more, are used as a check criterion.

[0094] Reference is now made to Fig. 1, which shows an embodiment of the system. In this embodiment, the drilling mud 10 is in a drilling mud recycling line 12. The drilling mud recycling line 12 comprises an ingredient supply device 32, a drilling mud mixing vat system 14, a flow conduit 24, and a drilling mud recycling equipment 22. It also comprises a magnetic resonance imaging device 26 encompassing at least a portion 28 of the flow conduit 24 and a processing system 30. During operation of the drilling mud recycling line, a plurality of raw materials ingredients 16 are injected into the mixing vat system 14, and are mixed until they form a drilling mud 18 of recycled drilling mud 10. The drilling mud 18 is then injected via conduit 24 into drilling mud recycling equipment 22 and drilling mud 10 is produced in drilling mud recycling equipment 22.

[0095] The magnetic image resonance device 26 monitors the process in situ, on line and in real time. A sample of drilling mud 18 is injected into flow conduit 24, such that the magnetic resonance imaging device 26 generates at least on magnetic resonance image of the drilling mud 18 flowing through the conduit 24. The processing system 30 processes the at least one magnetic resonance image of the sample of the drilling mud 18 to generate a quality test parameter QT, of the composition 18, as described above. The quality test parameter QT is compared to a predetermined check value as described below, and if the difference is greater than a predetermined amount, the ingredient supply device 32 is instructed to supply a predetermined amount of at least one ingredient 16 to mixing vat system 14. When the ingredient 16 has been incorporated into drilling mud 18, another sample of drilling mud 18 is injected into flow conduit 24, another at least one magnetic resonance image is generated, and the process is repeated iteratively until the quality test parameter QT differs from the predetermined check value by less than the predetermined amount. In a batch system, the process will terminate when mixing vat system 14 is empty, although no adjustments to the composition 18 are expected to be necessary after an acceptable composition has been attained, and the process will recommence when mixing vat system 14 has been refilled and a new batch of composition 18 has been produced. In a continuous process, there is continuous injection of ingredients 16 into mixing vat system 14, so that the contents of mixing vat system 14 are constantly being replenished.

[0096] The drilling mud recycling system 30 is configured to comply with ANSI/ISA SP76.00.2002 miniature, modular mechanical standard specifications.

[0097] Reference is now made to Fig. 2, which presents further details of the drilling mud recycling line 12, in accordance with a preferred embodiment of the present invention. As shown in Fig. 2, the drilling mud recycling line 12 comprises a vat 14, a batch manifold 19 and control valve 21, a pump 34, a conduit 24, and a drilling mud recycling equipment 22. It further comprises an ingredient processing system 30 and an ingredient supply device 32.

[0098] The ingredient processing system 30 comprises a processor 42, a memory unit 44 and a communications bus 46, such as a NeSSI communications bus, enabling communications between all parts of the system.

[0099] The ingredient processing system 30 communicates with the ingredient supply device 32 by means of a communications line 52. The ingredient supply device 32 comprises a plurality of N ingredient reservoirs 54. Typically, each reservoir 56 contains at least one ingredient, Ii=j. Each reservoir 56 includes a communications port 60, through which each reservoir 56 communicates with the communications line 52 via an internal communication bus 62.

[0100] In some embodiments, at least one reservoir 56 contains a mixture of at least two ingredients, Ii=j, i=m.

[0101] A batch of a sample of the drilling mud 10 is input into the vat 14 from a batch manifold 19 via a control valve 21. A pump 34 pumps the drilling mud 18 of the sample from the vat 14 to the drilling mud recycling equipment 22 via nuclear magnetic imaging device 26. A drilling mud flow 36 flows through the conduit 24. At least a portion, 48, of flow 36 passes through at least a portion of nuclear magnetic imaging device 26, between entrance port 64 and exit port 66.

[0102] In further reference to Fig. 2, the nuclear magnetic imaging device 26, which can be an NMR device, generates at least one magnetic resonance image 38 of the portion 48 of drilling mud flow 36 within the NMR device as a function of a radial location r, as is known in the art. The at least one magnetic resonance image 38 is processed by processor 42 to determine at least one radial velocity profile, v(r), 40 of the composition 18, where the radial parameter r is measured from the center of the conduit 24, such that r = 0 is the center of the conduit 24 and r = R is the edge of the flow 36. The at least one magnetic resonance image 38 is transferred to the processor 42 via communication line 50 and communication bus 46. In some embodiments, communication line 50 comprises part of communication bus 46.

[0103] As said above, drilling mud is used to control subsurface pressures, lubricate the drill bit, stabilize the well bore, and carry the cuttings to the surface, among other functions. As the drill bit grinds rocks into drill cuttings, these cuttings become entrained in the mud flow and are carried to the surface. In order to return the mud to the recirculating mud system and to make the solids easier to handle, the solids must be separated from the mud.

[0104] It is thus according to one embodiment of the invention, wherein the following system is provided useful: In order to recycle drilling mud, solids control equipment are used, and a typical four stage solids control equipment used. In a first stage: Shale shaker is utilized: according to rig size, 1 to 3 sets shale shaker will be used at the first stage solids control separation, e.g., this is done with an API 4-0 60 shaker screens. Cutting over 400 µm are separated in this stage. Then a desander and desilter are used as the second and third stage separation. A mud cleaner are utilized for these stages. It is a combination of shake shaker, desander and desilter. For smaller size rigs (usually, under 750 hp), mud treated by shale shaker and mud cleaner can be used for drilling. In some condition, while drilling depth is big, and high standard mud request, decantering centrifuge will be used as forth stage separation. Finer solids are to be separated. For gas cut drilling mud, vacuum degasser, poor degasser and ingnition device will be used.

[0105] In parallel to the said mud-recycling scheme, an NMR/MRI-analyzing system is integrally utilized to improve the recycle of the used drilling mud and to restore its characteristics to a predefined scale of characteristics, by following the following scheme: (i) defining parameters and values of optimal drilling mud; (ii) on-line and in situ analyzing parameters and values of used drilling mud, preferably, yet not exclusively, along the initial stages of the recycle, when the drilling mud exit from the drilling hole; (iii) comparing said optimal parameters and values and said on-line acquired parameters and values, namely determining the differences between those predefined parameters and value of the 'optimal drilling mud' and correspondent parameters and value of the 'actual drilling mud', thereby defining which recycle step is required, and further defining parameters and values; such as recycling temperature, operation time of each of the recycling steps, type and quantity of raw materials to admix with said mud, admixing parameters etc, wherein the raw materials can be selected from water, bentonite and the like, calcium containing salts and compositions thereof, surfactant (anionic, cationic or zwitterionic surfactants, for example), fresh drilling mud, water immiscible solutions etc. (iv) recycling the used drilling mud whilst continuously NMR/MRI analyzing its properties, thus on-line feedbacking the recycling system, until the characteristics of the recycled drilling mud equal (plus minus an allowable predefined measure) the stored characteristics of the 'optimal drilling mud'. Thus, this novel NMR/MRI-drilling mud recycling integrated-system, provides an on-line, in-situ, one continuous-step drilling when an optimal drilling mud is utilized, namely a drilling mud having predefined characteristics, such as rheological characteristics, fluid phase characteristics, alkalinity (calcium content and the such), dispersion characteristics and so on and so forth.

[0106] EP patent 0835463 discloses that NMR logging is a known method to determine these and other geologic formation parameters of interest. It is based on the observation that when an assembly of magnetic moments, such as those of hydrogen nuclei, are exposed to a static magnetic field they tend to align along the direction of the magnetic field, resulting in bulk magnetization. The rate at which equilibrium is established in such bulk magnetization upon provision of a static magnetic field is characterized by the parameter T1, known as the spin-lattice relaxation time. Another related and frequently used NMR logging parameter is the so called spin-spin relaxation time constant T2 (also known as transverserelaxation time) which is related to the relaxation due to non-homogeneities in the local magnetic field over the sensing volume of the logging tool. The '463 patent further discloses a formation diffusion D which is dependent on the pore sizes of the formation. Mechanisms which determine the values of T1, T2 and D depend on the molecular dynamics of the sample being tested. In bulk volume liquids, typically found in large pores of the formation, molecular dynamics is a function of molecular size and inter-molecular interactions which are different for each fluid. Thus, water and different types of oil each have different T1, T2 and D values.

[0107] According to one embodiment not forming part of the present invention, thus, a time resolved or no-time resolved methods of analyzing drilling parameters, is provided useful, especially as defined in the integrated NMR/MRI drilling mud recycling system the above. The method comprising, inter alia, the following steps: at least one step of imaging and timing a series of NMR/MRI images of drilling mud before mud's re-used in a drilling hole (Tinflux); either continuously or batch-wise flowing said time-resolved imaged drilling mud within said drilling hole whilst drilling said hole; after flowing period, i.e., time length between drilling mud influx and its outflow out from the hole, at least one step of imaging and timing a series of NMR/MRI images of drilling mud after the use in a drilling hole (Toutflow); comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow); thereby defining the change of said parameter and analyzing parameters related with the drilling: such as debris shape and size, particle distribution and smoothness etc.

[0108] According to another embodiment not forming part of the invention, a similar method of analyzing drilled product is presented. This method comprises, inter alia, the following steps: at least one step of imaging and timing a series of NMR/MRI images of drilling mud before mud's re-used in a drilling hole (Tinflux); either continuously or batch-wise flowing said time-resolved imaged drilling mud within said drilling hole whilst drilling said hole, thereby providing said drilling mud as a flowing carrier of the drilled product: such as solid ground, earth samples, water oil, gas, ores, coal etc); after flowing period, i.e., time length between drilling mud influx and its outflow out from the hole, at least one images of drilling mud after the use in a drilling hole (Toutflow); and then comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow); thereby defining the change of said parameter and analyzing said drilled product.

[0109] In those methods, the aforesaid step of comparing at least one parameter of said inflowing mud (timed at Tinflux) and said outflowing mud timed (timed at Toutflow) may further comprising a step of measuring the relaxation time T1, T2 and diffusion coefficient D as discussed above.


Claims

1. A method of operating a system for analyzing and treating drilling mud, said system comprising:

a drilling mud recycling line (12) comprising equipment configured to perform a process of recycling said drilling mud (10),

a magnetic resonance imaging (MRI) device (26) configured to provide at least one image (38) of at least a portion of said drilling mud in said drilling mud recycling line,

pressure sensors arranged to measure a radial pressure profile of drilling mud in said drilling mud recycling line (10), and

a processor for analyzing and controlling the recycling of said drilling mud;

said method comprising:

generating standard quality parameter

from analysis of a standardized sample of said drilling-mud, said analysis of said standardized sample generating standardized stress parameters kS and nS in the power law equation σS(r)=kS[γS(r)]nS from rheological parameters standardized radial shear stress σS(r) and standardized radial shear rate parameter γS(r);

imaging at least a portion of a test sample of said drilling mud by means of said MRI device (26);

measuring at least two radial pressure profiles of said test sample;

analyzing said MRI image and said radial pressure profits to derive rheological parameters radial shear stress σ(r) and radial shear rate γ(r) of said drilling mud;

determining at least one drilling mud composition quality parameter

from analysis of said test sample of said drilling mud, said analysis generating drilling-mud stress parameters kc and nc in the power law equation σC(r)=kC[γC(r)]nC from said rheological parameters drilling-mud radial shear stress parameter σC(r) and drilling-mud shear rate parameter γC(r)

communicating results of said analysis to said drilling mud recycling equipment; and

controlling at least one step in the recycling of said drilling mud according to said results dependent on a comparison of QC to QS.


 
2. The method according to claim 1, additionally comprising generating quality test parameter QT = |QS - QC|.
 
3. The method according to claim 2 comprising setting a quality criterion as: said quality test parameter is smaller than one standard deviation of said standard quality parameter or said drilling-mud composition quality parameter.
 
4. The method according to claim 3, additionally comprising inputting a further batch of said drilling mud to said drilling mud recycling line (12) if said quality test parameter satisfies said quality criterion.
 
5. The method according to claim 3 comprising injecting a quantity of at least one ingredient into said drilling mud if said quality test parameter does not satisfy said quality criterion.
 
6. The method according to claim 1, wherein said at least one step in the recycling of said drilling mud comprises any of adding ingredients and raw materials, mixing, shaking, rotating, tumbling, aerating, heating, cooling, holding at a fixed temperature, emulsifying, adding water or water immiscible solutions, grinding, grounding, milling, shredding, pulvering, cutting, filtering, reducing particle size, de-emulsifying, kneading, decanting, setteling, destiling, decentering, vacuuming and any combination thereof.
 
7. A system for analyzing and treating drilling mud comprising a drilling mud recycling line comprising drilling mud recycling equipment configured to perform a process of recycling said drilling mud; an MRI device (26) configured to provide at least one image of at least a portion of said drilling mud in said drilling mud recycling line; pressure sensors arranged to measure a radial pressure profile; and a processor configured to implement a method according to any preceding claim.
 


Ansprüche

1. Verfahren zum Betreiben einer Anlage zum Analysieren und Behandeln von Bohrschlamm, wobei die Anlage Folgendes umfasst:

Eine Bohrschlamm-Wiederaufbereitungslinie (12), umfassend Geräte, die dazu konfiguriert sind, einen Prozess zum Wiederaufbereiten von Bohrschlamms (10) durchzuführen,

eine Magnetresonanztomografievorrichtung (MRT) (26), die dazu konfiguriert ist, mindestens ein Bild (38) mindestens eines Abschnitts des Bohrschlamms in der Bohrschlamm-Wiederaufbereitungslinie zu liefern,

Drucksensoren, die zum Messen eines radialen Druckprofils vom Bohrschlamm in der Bohrschlamm-Wiederaufbereitungslinie (10) angeordnet sind, und

einen Prozessor zum Analysieren und Steuern der Wiederaufbereitung des Bohrschlamms, umfassend:

Generieren des Standardqualitätsparameters

aufgrund der Analyse einer standardisierten Bohrschlammprobe, wobei die Analyse der standardisierten Probe die standardisierten Belastungsparameter ks und ns in der Potenzgesetzgleichung σS(r)=kS[γS(r)]nS aufgrund der rheologischen Parameter der standardisierten Scherbelastung σs(r) und des standardisierten radialen Scherratenparameters γs(r) generiert;

Abbilden mindestens eines Abschnitts einer Testprobe des Bohrschlamms mittels der MRT-Vorrichtung (26);

Messen von mindestens zwei radialen Druckprofilen der Testprobe;

Analysieren des MRT-Bildes der radialen Druckprofile, um die rheologischen Parameter radiale Scherbelastung σ(r) und radiale Scherrate γ(r) des Bohrschlamms abzuleiten;

Bestimmen mindestens eines Qualitätsparameters

der Bohrschlammzusammensetzung aufgrund der Analyse der Testprobe des Bohrschlamms, wobei durch diese Analyse die Belastungsparameter kc und nc des Bohrschlamms in der Potenzgesetzgleichung σC(r)=kC[γC(r)]nC aufgrund der rheologischen Parameter radiale Scherbelastung σc(r) des Bohrschlamms und radialer Scherratenparameter γc(r) des Bohrschlamms erzeugt werden,

Kommunizieren der Ergebnisse der Analyse des Bohrschlamm-Wiederaufbereitungsgeräts; und

Steuern mindestens eines Schritts in der Wiederaufbereitung des Bohrschlamms gemäß den Ergebnissen in Abhängigkeit eines Vergleiches von Qc mit Qs.


 
2. Verfahren nach Anspruch 1, zusätzlich umfassend Generieren vom Qualitätstestparameter QT = |Qs - Qc|.
 
3. Verfahren nach Anspruch 2, umfassend Festlegen eines Qualitätskriteriums als: Der Qualitätstestparameter ist kleiner als eine Standardabweichung des Standardqualitätsparameters oder des Qualitätsparameters der Bauschlammzusammensetzung.
 
4. Verfahren nach Anspruch 3, zusätzlich umfassend Eingeben einer weiteren Charge des Bohrschlamms in die Bohrschlamm-Wiederaufbereitungslinie (12), falls der Qualitätstestparameter das Qualitätskriterium erfüllt.
 
5. Verfahren nach Anspruch 3, umfassend Injizieren einer Menge mindestens eines Inhaltsstoffs in den Bohrschlamm, falls der Qualitätstestparameter das Qualitätskriterium nicht erfüllt.
 
6. Verfahren nach Anspruch 1, wobei der mindestens eine Schritt in der Wiederaufbereitung des Bohrschlamms einen beliebigen hiervon umfasst: Hinzugeben von Inhaltsstoffen und Rohmaterialien, Mischen, Schütteln, Rotieren, Taumeln, Belüften, Erwärmen, Abkühlen, auf einer festen Temperatur halten, Emulgieren, Hinzugeben von Wasser und nicht mit Wasser mischbaren Lösungen, Mahlen, Zerkleinern, Fräsen, Shreddern, Pulverisieren, Zerschneiden, Filtrieren, die Teilchengröße verringern, Demulgieren, Kneten, Dekantieren, Sich-Absetzen-Lassen, Destillieren, Dezentrieren, Saugen und eine beliebige Kombination.
 
7. Anlage zum Analysieren und Behandeln von Bohrschlamm, umfassend eine Bohrschlamm-Wiederaufbereitungslinie umfassend Wiederaufbereitungsgeräte für Bohrschlamm, die dazu konfiguriert sind, einen Prozess des Wiederaufbereitens des Bohrschlamms durchzuführen; eine MRT-Vorrichtung (26), die dazu konfiguriert ist, mindestens ein Bild mindestens eines Abschnitts der Bohrschlamm-Wiederaufbereitungslinie zu liefern; Drucksensoren, die dazu angeordnet sind, ein radiales Druckprofil zu messen; und ein Prozessor, der dazu konfiguriert ist, ein Verfahren nach einem beliebigen der vorhergehenden Ansprüche zu implementieren.
 


Revendications

1. Procédé de fonctionnement d'un système d'analyse et de traitement de boue de forage, ledit système comprenant :

une ligne de recyclage de boue de forage (12) comprenant un équipement configuré pour exécuter un processus de recyclage de ladite boue de forage (10),

un dispositif d'imagerie par résonance magnétique (IRM) (26) configuré pour fournir au moins une image (38) d'au moins une partie de ladite boue de forage dans ladite ligne de recyclage de boue de forage,

des capteurs de pression agencés pour mesurer un profil de pression radiale de boue de forage dans ladite ligne de recyclage de boue de forage (10), et

un processeur pour analyser et contrôler le recyclage de ladite boue de forage ; ledit procédé comprenant :

de générer un paramètre de qualité

standard à partir de l'analyse d'un échantillon normalisé de ladite boue de forage, ladite analyse dudit échantillon normalisé générant des paramètres de contrainte normalisés ks et ns dans l'équation de la loi de puissance σS(r)=kS[γS(r)]nS à partir de paramètres rhéologiques normalisés en contrainte de cisaillement radial σs(r) et normalisés en paramètre radial de taux de cisaillement ys(r) ;

d'imager au moins une partie d'un échantillon test de ladite boue de forage au moyen dudit dispositif IRM (26) ;

de mesurer au moins deux profils de pression radiale dudit échantillon test ;

d'analyser ladite image IRM et lesdits profils de pression radiale afin de dériver les paramètres rhéologiques de la contrainte de cisaillement radial σ(r) et du taux de cisaillement radial γ(r) de ladite boue de forage ;

de déterminer au moins un paramètre de qualité de composition de la boue de forage

à partir de l'analyse dudit échantillon test de ladite boue de forage, ladite analyse générant des paramètres de contrainte de boue de forage kc et nc dans l'équation de la loi de puissance σC(r)=kC[γC(r)]nC à partir desdits paramètres rhéologiques, paramètre de contrainte de cisaillement radial de la boue de forage σc(r) et paramètre du taux de cisaillement de la boue de forage γc(r)

de communiquer les résultats de ladite analyse au dit équipement de recyclage de boue de forage ; et de contrôler au moins une étape du recyclage de ladite boue de forage en fonction desdits résultats selon une comparaison de Qc et Qs.


 
2. Procédé selon la revendication 1, comprenant en outre la génération d'un paramètre de test de qualité QT = lQs - Qcl.
 
3. Procédé selon la revendication 2, comprenant l'établissement d'un critère de qualité comme suit : ledit paramètre de test de qualité est inférieur à un écart-type dudit paramètre de qualité standard ou dudit paramètre de qualité de composition de la boue de forage.
 
4. Procédé selon la revendication 3, comprenant en outre l'étape consistant à introduire un autre lot de ladite boue de forage dans ladite ligne de recyclage de boue de forage (12) si ledit paramètre de test de qualité satisfait audit critère de qualité.
 
5. Procédé selon la revendication 3, consistant à injecter une quantité d'au moins un ingrédient dans ladite boue de forage si ledit paramètre de test de qualité ne satisfait pas au critère de qualité.
 
6. Procédé selon la revendication 1, dans lequel ladite au moins une étape du recyclage de ladite boue de forage comprend l'un quelconque parmi l'addition d'ingrédients et de matières premières, le mélange, l'agitation, la rotation, le retournement, l'aération, le chauffage, le refroidissement, le maintien à une température fixe, l'émulsification, l'ajout d'eau ou de solutions non miscibles à l'eau, le broyage, la mouture, le fraisage, le déchiquetage, la pulvérisation, la coupe, le filtrage, la réduction de la taille des particules, la désémulsification, le malaxage, la décantation, la sédimentation, la déstylisation, la décentralisation, l'aspiration et toute combinaison de ceux-ci.
 
7. Système d'analyse et de traitement de boue de forage comprenant une ligne de recyclage de boue de forage comprenant un équipement de recyclage de boue de forage configuré pour exécuter un processus de recyclage de ladite boue de forage ; un dispositif IRM (26) configuré pour fournir au moins une image d'au moins une partie de ladite boue de forage dans ladite ligne de recyclage de boue de forage ; des capteurs de pression agencés pour mesurer un profil de pression radiale ; et un processeur configuré pour mettre en oeuvre un procédé selon l'une quelconque des revendications précédentes.
 




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Cited references

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