Patent Number: 6,166,546

Title: Method for determining the relative clay content of well core

Abstract: A method for determining a relative clay content of at least a portion of a well core taken from a subterranean geologic formation by: determining the relationship of the clay content of the well core portion to the dielectric constant of the well core portion at a selected frequency at relatively few locations over a substantial length of the well core portion by measuring the clay content by a clay determination test such as x-ray diffraction, thin section analysis, sieve analysis or laser particle analysis and the dielectric constant at the locations; and, measuring the dielectric constant of the well core portion at a large plurality of spaced apart other locations on the well core portion at the selected frequency; translating the large plurality of dielectric measurements according to the relationship into relative clay content measurements. The dielectric constant is representative of the water constant of the well core portion, which is related to the clay content of the well core portion.

Inventors: Scheihing; Mark H. (Richardson, TX), White; Gary Lee (Dallas, TX), Klein; James D. (Lucas, TX)

Assignee: Atlantic Richfield Company

International Classification: E21B 49/00 (20060101); E21B 49/02 (20060101); G01N 27/22 (20060101); G01N 33/24 (20060101); G01V 003/06 (); E21B 049/00 ()

Expiration Date: 12/26/2017