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:
Jun. 21, 2011
Filed:
Jul. 28, 2009
Applicants:
Yuesheng Cheng, Edmonton, CA;
Abdel M. Kharrat, Edmonton, CA;
Inventors:
Yuesheng Cheng, Edmonton, CA;
Abdel M. Kharrat, Edmonton, CA;
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01V 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Viscosity of heavy oil is determined in situ in a formation by making nuclear magnetic resonance (NMR) measurements in the formation, and then calculating viscosity according to an equation of the form where T is the temperature of the heavy oil sample, η is the viscosity, Tis the logarithmic mean of the Tdistribution spectrum of the sample, and a, b, and c are non-zero constants. Typically, constant b has a value between 5 and 7 and constant c has a value between −0.7 and −0.5.