Method for identifying porosity and drilling mud invasion of a c

Details Method for identifying porosity and drilling mud invasion of a c Method for identifying porosity and drilling mud invasion of a c

1986-06-09

1988-01-26

Fields, Carolyn E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 51, 2502521, 250262, 250269, G01N 2306, G01V 500

Patent

active

047220953

ABSTRACT:
A core sample invaded by drilling mud is scanned with X-rays and computed tomographic images are produced. The images are calibrated to a density scale based on the barite content of the drilling mud. The mud solid volume in the pores of the core sample are determined from the density contrast created in the computed tomographic images by the presence of barite in the core sample. This mud solid volume is used to provide a corrected porosity measurement on the core sample.

REFERENCES:
patent: 3839899 (1974-10-01), McMillen
patent: 4146788 (1979-03-01), Mirkin et al.
patent: 4157472 (1979-06-01), Beck, Jr. et al.
patent: 4283629 (1981-08-01), Habermehl et al.
patent: 4399509 (1983-08-01), Hounsfield
patent: 4422177 (1983-12-01), Mastronardi et al.
patent: 4571491 (1986-02-01), Vinegar et al.
patent: 4649483 (1987-03-01), Dixon
"Computed Tomographic Analysis of Meteorite Inclusions", by J. R. Arnold, et al., Science, vol. 219, Jan. 1983, pp. 383-384.

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