EP 2469020 A1 20120627 - Process of hydraulic fracturing to create a layered proppant pack structure alongside the faces of the fracture to prevent formation fines to damage fracture conductivity
Title (en)
Process of hydraulic fracturing to create a layered proppant pack structure alongside the faces of the fracture to prevent formation fines to damage fracture conductivity
Title (de)
Verfahren zur hydraulischen Bruchstellenbildung zur Erzeugung einer geschichteten Stützmittelpackstruktur entlang der Oberflächen der Bruchstelle zur Verhinderung der Spanbildung zur Zerstörung der Bruchstellenleitfähigkeit
Title (fr)
Procédé de fracturation hydraulique afin de créer une structure de pack d'agent de soutènement en couche le long des bords de la fracture afin d'empêcher la formation de fins pouvant endommager la conductivité de la fracture
Publication
Application
Priority
EP 10016022 A 20101223
Abstract (en)
Method of hydraulic fracturing oil and or gas wells to create a layered proppant pack structure alongside the faces of the fracture to prevent formation fines (10) to damage the fracture conductivity over time characterized in that it comprises several distinct steps: i) Creating a hydraulic fracture (11) and transporting into the so opened fracture a "fine grained proppant" (5) (equally called "fine proppant" or "fine grained proppant" or "support proppant") ii) Shutting-in the well to let the fracture close and the confinement stress of the reservoir to be re-established so as to compress the fine proppant against the walls of the fracture and resulting in a strong adhesion of the fine grained proppant against the walls of the fracture via mechanical and/or chemical mechanisms. iii) Re-opening the same hydraulic fracture using a conventional fracturing technique to place a "larger or much larger proppant" (30) (equally called "coarse proppant" or "conductive proppant") in the middle of the fracture width and therefore between the layers of the fine proppant remaining in place against the walls of the fracture because of the strong interactions previously established during the shut-in, and acting as a "support" for the larger proppant, the said fine "support" proppant allowing the said larger proppant to ensure and retain a high conductivity for a long period of time.
IPC 8 full level
E21B 43/267 (2006.01)
CPC (source: EP)
E21B 43/267 (2013.01)
Citation (applicant)
- US 5775425 A 19980707 - WEAVER JIM D [US], et al
- US 5871049 A 19990216 - WEAVER JIM D [US], et al
- US 6725931 B2 20040427 - NGUYEN PHILIP D [US], et al
- US 7261157 B2 20070828 - NGUYEN PHILIP D [US], et al
- US 7318474 B2 20080115 - WELTON THOMAS D [US], et al
- US 6047772 A 20000411 - WEAVER JIM D [US], et al
- US 5871049 A 19990216 - WEAVER JIM D [US], et al
- US 5305211 A 19940419 - SOLIMAN MOHAMED Y [US]
- US 2009044945 A1 20090219 - WILLBERG DEAN M [US], et al
- WO 2007086771 A1 20070802 - SCHLUMBERGER TECHNOLOGY BV [NL], et al
- EP 1977079 A1 20081008 - SCHLUMBERGER TECHNOLOGY BV [NL]
- HALLIBURTON: "Conductivity Endurance", E&P" AND "OIL AND GAS INVESTOR" MAGAZINES, 2005
- B. BARREE; H. FITZPATRICK; J.MANRIQUE; M. MULLEN; S. SCHUBARTH; M. SMITH; N. STEGENT.: "Propping-up Production", GENERAL INTRODUCTION
- M. C. VINCENT: "SPE 119143: Examining our assumptions - Have oversimplifications jeopardized our ability to design optimal fracture treatments?", AN EXTENSIVE REVIEW OF RE-FRACTING OPERATIONS
- "Reservoir Stimulation"
Citation (search report)
- [X] US 5005645 A 19910409 - JENNINGS JR ALFRED R [US], et al
- [A] US 4817717 A 19890404 - JENNINGS JR ALFRED R [US], et al
- [A] US 4623021 A 19861118 - STOWE LAWRENCE R [US]
- [A] US 3316967 A 19670502 - HUITT JIMMIE L, et al
Designated contracting state (EPC)
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 10016022 A 20101223; IB 2011003115 W 20111222