Title:
A METHOD AND APPARATUS FOR DIFFERENTIATING OIL BASED MUD FILTRATE FROM CONNATE OIL
Document Type and Number:
WIPO Patent Application WO2000010036
Kind Code:
A9
Abstract:
A method and apparatus for processing nuclear magnetic resonance information (76) to differentiate between oil based mud filtrate (OBM), and connate oils, during subsurface exploration. An NMR experiment is performed on a sample (70) of formation fluid, and the resulting data is processed to differentiate the relaxation parameters (80) characteristic of OBMs and those characteristic of connate oils. A simple arithmetic difference (84) between relaxation times calculated for successive samples may be followed by a distribution analysis performed in either the time domain or relaxation spectrum domain (86, 94).
Inventors:
PRAMMER MANFRED G
Application Number:
PCT/US1999/018597
Publication Date:
July 27, 2000
Filing Date:
August 16, 1999
Export Citation:
Assignee:
NUMAR CORP (US)
International Classes:
G01R33/44; G01R33/46; (IPC1-7): G01V3/00
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