Well logs can be used to locate and evaluate deposits of various commercially important minerals. It is only necessary that the mineral of interest represent a significant fraction of the formation bulk volume, and that it exhibit characterizing properties measurable by logs. Because modern logging methods measure electrical, density, acoustic, radioactivity, and certain nuclear characteristics of formations, they may be used to identify many minerals. For evaluation of sulfur deposits, either density or sonic logs provide good resolution when compared with porosity computed from neutron or resistivity logs. Trona beds are identified by a sonic reading of approximately 65 μsec/ft, neutron porosity index of about 40 percent, low natural radioactivity, and pronounced hole enlargement. Gamma‐ray logs provide important information in the location, identification, and evaluation of potash mineral deposits. Neutron, sonic, and density logs, in various combinations, augment the gamma‐ray data in such studies. Co...
[1]
M. Tixier,et al.
Oil shale yield predicted from well logs
,
1967
.
[2]
S. T. Algermissen,et al.
Evaluating Oil Shale by Log Analysis
,
1963
.
[3]
R. P. Alger,et al.
Formation Density Log Applications in Liquid-Filled Holes
,
1963
.
[4]
M. P. Tixier,et al.
New Developments in Induction and Sonic Logging
,
1960
.
[5]
W. C. Savre,et al.
Determination of a More Accurate Porosity and Mineral Composition in Complex Lithologies with the Use Of the Sonic, Neutron and Density Surveys
,
1963
.