E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/3
E21B 47/06 (2006.01) G01V 1/28 (2006.01)
Patent
CA 2034264
A B S T R A C T METHOD FOR IDENTIFYING HYDROCARBON-BEARING ZONES IN SUBSURFACE FORMATIONS A compressional-to-shear wave velocity ratio is measured in a subsurface sandstone formation. Ratios of compressional-to-shear wave velocity are determined over a plurality of shear wave travel times in water-bearing sandstone and shale. The subsurface sandstone formation is identified as being hydrocarbon-bearing when the measured compressional-to- shear wave velocity ratio in the subsurface formation is less than an identified minimum of the compressional-to-shear wave velocity ratios determined for water-bearing sandstone and shale.
Gowling Lafleur Henderson Llp
Mobil Oil Corporation
Williams Donald M.
LandOfFree
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