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:
Mar. 13, 2012
Filed:
May. 10, 2005
Raj Kumar Michael Thambynayagam, Sugar Land, TX (US);
Jeffrey Spath, Missouri City, TX (US);
Raj Banerjee, Abingdon, GB;
David Brian White, Fen Ditton, GB;
Peter Allan Goode, Lavender Bay, AU;
Raj Kumar Michael Thambynayagam, Sugar Land, TX (US);
Jeffrey Spath, Missouri City, TX (US);
Raj Banerjee, Abingdon, GB;
David Brian White, Fen Ditton, GB;
Peter Allan Goode, Lavender Bay, AU;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A reservoir pressure in an underground formation surrounding a well is analyzed based on a direct measurement of the pressure at the wall of the well using the permeability of mud cake on the wall of the well in the region in which the pressure measurement is made; determining the thickness of mud cake on the well of the well; determining the hydrostatic pressure in the well in the region in which the pressure measurement is made; calculating a pressure decay index from the mud cake permeability and thickness, the hydrostatic pressure and the measured pressure; and using the pressure decay index to analyze the measured pressure to derive the reservoir pressure.