Radioactive Logging Parameters for Common Minerals


H. Edmundson, L. L. Raymer,
Schlumberger-Doll Research

7th Formation Evaluation Symposium of the
Canadian Well Logging Society in Calgary, October 21, 22, 23 & 24, 1979



This paper presents a list of about seventy min- erals encountered in sedimentary formations to- gether with their associated radioactive logging parameters. A procedure to calculate the radio- active parameters is given, and exact details are furnished for all logs but the neutron, which re- quires extensive and complex computation. It is significant that without considering rare elements such as boron, the computed neutron porosities assuming a thermal detecting device are consist- ently higher in shales, micas and zeolites than with an epithermal detecting device. This confirms our experience in the field.


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