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:
Sep. 06, 2011
Filed:
Aug. 05, 2009
Yuesheng Cheng, Edmonton, CA;
Abdel M. Kharrat, Edmonton, CA;
Yuesheng Cheng, Edmonton, CA;
Abdel M. Kharrat, Edmonton, CA;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
The viscosity η (in centipoise) of a heavy oil sample is determined according to an equation of the form ln where T is the temperature of the heavy oil, Tis the logarithmic mean of the Tdistribution of the sample obtainable from nuclear magnetic resonance (NMR) measurements, c'=1.0±0.05, c″=1.0±0.04, ηis the glass transition temperature viscosity of the heavy oil and a function of T, and C1 is a variable which is a constant for the heavy oil and is a function of T. Both C1 and ηare considered functions of certain NMR values associated with the heavy oil sample, with ηand C1 preferably estimated by empirically fitting data to the equations ln T=a′+b′ ln ηand ln T=a″+b″C1, where a′, b′, a″ and b″ are constants.