EP 3990747 A1 20220504 - METHOD FOR ABANDONING WELLBORES
Title (en)
METHOD FOR ABANDONING WELLBORES
Title (de)
VERFAHREN ZUM AUFLASSEN VON BOHRLÖCHERN
Title (fr)
PROCÉDÉ SERVANT À ABANDONNER DES PUITS DE FORAGE
Publication
Application
Priority
IB 2019055355 W 20190625
Abstract (en)
[origin: WO2020260928A1] A method of abandoning a wellbore can include obtaining a first sample data set within a wellbore, wherein the first sample data set is a sample of an acoustic signal originating within the wellbore; determining a plurality of frequency domain features of the first sample data set; identifying a fluid flow location within the wellbore using the first plurality of frequency domain features; setting a barrier (130A, 131A, 130B, 131B, 130C) at or above the fluid flow location; obtaining a second sample data set above the barrier, wherein the second sample data set is a sample of an acoustic signal originating within the wellbore above the barrier; determining a second plurality of frequency domain features of the second sample data set; and identifying that a fluid flow rate or flow mechanism at the fluid flow location has been reduced or eliminated and/or identifying another fluid flow location using the second plurality of frequency domain features.
IPC 8 full level
E21B 47/10 (2012.01)
CPC (source: EP US)
E21B 47/107 (2020.05 - EP US)
Citation (search report)
See references of WO 2020260928A1
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)
WO 2020260928 A1 20201230; CA 3145162 A1 20201230; EP 3990747 A1 20220504; US 2022251943 A1 20220811
DOCDB simple family (application)
IB 2019055355 W 20190625; CA 3145162 A 20190625; EP 19765548 A 20190625; US 201917618433 A 20190625