Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1992-03-31
1993-04-06
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
166250, 73152, G01V 130
Patent
active
052009297
ABSTRACT:
A method for estimating pore fluid pressure in a subterranean formation is disclosed for use in drilling wells. A pair of velocity-effective stress relations are used to compute pore fluid pressure from velocity data. One relation applies when the current effective stress is the highest ever experienced by the subterranean formation. The second relation accounts for hysteresis effects when the effective stress has been reduced. Pore fluid pressure is found by subtracting the computed effective stress from an estimate of the overburden stress.
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Bell Keith A.
Exxon Production Research Company
Lobo Ian J.
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