Title:
REAL-TIME METHOD FOR MAINTAINING FORMATION STABILITY
Document Type and Number:
WIPO Patent Application WO2001094749
Kind Code:
A8
Abstract:
A real-time method is disclosed for maintaining subterranean formation stability through monitoring the interaction between the formation and fluids introduced into (or produced from) a wellbore penetrating the formation. The method employs real-time wellbore (in)stability logging methodology. The method is exemplified by a Pore Pressure Transmission (PPT) test. In such test, test fluids are exposed to Pierre II shales (20 % w/w NaCl solution and sodium silicate fluid with 20 % w/w NaCl, for example) in a PPT apparatus. Membrane efficiency of the two fluids when exposed to the outcrop shale is calculated, and based on the simultaneous acquisition of acoustic data, estimation of a dynamic rock property is made. Calibrating representative shale (or other formation) core response to drilling fluids (or well service fluids, enhanced recovery fluids, or production fluids) under realistic in-situ conditions aids in accurately modeling for time-dependent formation (in)stability in the field for the entire life of the wellbore, from drilling, completion and through production.
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Inventors:
TARE UDAY ARUN
MODY FERSHEED KHODADAD
MESE ALI I
JIAO DI
HAKIMUDDIN MUSTAFA
MODY FERSHEED KHODADAD
MESE ALI I
JIAO DI
HAKIMUDDIN MUSTAFA
Application Number:
PCT/US2001/018134
Publication Date:
July 08, 2004
Filing Date:
June 05, 2001
Export Citation:
Assignee:
HALLIBURTON ENERGY SERV INC (US)
International Classes:
E21B21/08; E21B44/00; E21B49/00; (IPC1-7): E21B44/00; E21B49/00; E21B21/08
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