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:
Jul. 21, 2009
Filed:
Jun. 27, 2007
David Alumbaugh, Berkeley, CA (US);
Ping Zhang, Albany, CA (US);
Edward Nichols, Berkeley, CA (US);
Frank Morrison, Berkeley, CA (US);
Aria Abubakar, North Reading, MA (US);
Tarek Habashy, Burlington, MA (US);
David Alumbaugh, Berkeley, CA (US);
Ping Zhang, Albany, CA (US);
Edward Nichols, Berkeley, CA (US);
Frank Morrison, Berkeley, CA (US);
Aria Abubakar, North Reading, MA (US);
Tarek Habashy, Burlington, MA (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
Characterizing a reservoir with electromagnetic imaging surveys includes normalizing measured voltage data by transmitter moment, sorting the normalized voltage data into common receiver profiles, densely resampling transmitter locations using common positions for the receiver profiles, coarsely resampling the data at discreet transmitter locations, defining a starting model for inversion, weighting the data by a factor, converting the normalized voltage data to ratios, calculating a conductivity image using a ratio inversion method, and verifying that an inversion has converged and the image is geologically reasonable. The image can then be displayed. The invention can be used for cross-well, surface-to-borehole, and borehole-to-surface measurements by which the effects of steel casing are reduced.