[12] Patent
[11] Patent No.:GC0007660  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/126562
Date of the Decision to Grant the Patent:29/Apr/2018

[21] Application No.:GC 2014-28242

[22] Filing Date:3/11/2014

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventors:1- ROWE, Mathew DENNISŲŒ2- GRAVES, Walter VARNEY

[73] Owner: Halliburton Energy Services,Inc., 10200 Bellaire Boulevard, Houston, 77072, Texas , USA

[74] Agent: Saba & Co. T.M.P




Int. Cl.: G06F 19/00 (2011.01)

[56] Cited Documents:

-POLICARPO, N. A. et al., 'Experimental Measurement of Gas-Liquid Diffusivity' In: Brazilian Journal of Petroleum and Gas, 2011, Vol. 5, No. 3, pp. 171-188, ISSN 1982-0593.
-US 20010045119 A1 (P. RICHARD WARBURTON) 29 November 2001
-US 20070266800 A1 (DAVID A. RISK) 22 November 2007
-US 20020050161 A1 (P. RICHARD WARBURTON) 02 May 2002
-US 20030006768 A1 (ROBERT L. KLEINBERG et al.) 09 January 2003
Examiner: Eng. Mohammed A. AlShamrani

[57] Abstract: Some aspects determining formation gas composition during well drilling can be implemented as a computer-implemented method, a computer-readable medium, or a computer system. A theoretical diffusion coefficient for a drilling fluid that comprises gas from a formation through which the drilling fluid is flowed is determined. The theoretical diffusion coefficient is based on an extraction of all of the gas from the drilling fluid. An experimental diffusion coefficient for the drilling fluid based on well drilling parameters is determined. A concentration of the gas at the formation is determined based, at least in part, on a difference between the theoretical diffusion coefficient and the experimental diffusion coefficient. The determined concentration at the formation is provided.
No. of claims: 20     No. of figures: 3


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