The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2002
Filed:
Mar. 24, 2000
Applicant:
Inventors:
Assignee:
Petrophysical Consulting, Inc., Emerald Hills, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 1/28 ;
U.S. Cl.
CPC ...
G01V 1/28 ;
Abstract
The present invention includes a method for overpressure detection and pore pressure change monitoring in subsurface gas, liquid hydrocarbon, or water reservoirs from compressional- and shear-wave measurement data. As part of this method, one or more Poisson's ratios are determined from field-based measurement data and are then compared against known Poisson's ratio values representative of the particular subsurface formation type. By applying a Poisson's ratio—pore pressure criterion that is appropriate for that type of formation, an overpressure in the formation is identified.