Method of evaluating the capillary pressure curve of an...

Details Method of evaluating the capillary pressure curve of an... Method of evaluating the capillary pressure curve of an...

2006-08-15

2006-08-15

McElheny, Jr., Donald (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Earth science

C702S013000

Reexamination Certificate

active

07092822

ABSTRACT:
A method of evaluating the capillary pressure curve of rocks of an underground reservoir from measurements on rock debris or fragments such as cuttings from the reservoir, over the total saturation range of these rocks, within a short period and at a low cost, from these measurements is disclosed. The method comprises measuring the permeability k of the debris, measuring the capillary pressure curve Pc as a function of the saturation of these fragments initially saturated with a fluid (brine for example) by subjecting them to centrifugation, and parametrizing a capillary pressure curve Pc satisfying empirical relations depending on adjustable parameters, constrained to adjust to an asymptotic part of the capillary curve measured by centrifugation, and to the value of permeability k measured on the cuttings, so as to obtain the whole of the capillary pressure curve. Applications include hydrocarbon reservoir evaluation.

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patent: 5832409 (1998-11-01), Ramakrishnan et al.
patent: 2002/0029615 (2002-03-01), Lenormand et al.
patent: 0 786 658 (1997-07-01), None
patent: 2 354 590 (2001-03-01), None

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