Gamma ray logging is a method of measuring naturally occurring gamma radiation to characterize the rock or sediment in a borehole or drill hole. It is...
7 KB (869 words) - 23:12, 4 December 2022
The formation evaluation gamma ray log is a record of the variation with depth of the natural radioactivity of earth materials in a wellbore. Measurement...
7 KB (1,158 words) - 00:14, 27 December 2023
or drill pipe) BHC – BHC gamma ray log[clarification needed] BHCA – BHC acoustic log[clarification needed] BHCS – BHC sonic log[clarification needed] BHCT...
97 KB (11,946 words) - 04:11, 12 June 2024
gamma ray log, measuring the natural radioactivity, was introduced by Well Surveys Inc. in 1939, and the WSI neutron log came in 1941. The gamma ray log...
32 KB (4,114 words) - 13:42, 16 February 2024
porosity logs and sonic logs. The two main nuclear porosity logs are the Density and the Neutron log. Density logging tools contain a caesium-137 gamma ray source...
27 KB (4,344 words) - 23:26, 16 February 2024
out ) d log ( V in ) . {\displaystyle \gamma ={\frac {\mathrm {d} \log(V_{\text{out}})}{\mathrm {d} \log(V_{\text{in}})}}.} That is, gamma can be visualized...
43 KB (5,349 words) - 01:06, 14 September 2024
log types such as SP, resistivity, porosity, and gamma ray logs are discussed in detail by Asquith and Gibson (1982). ... A spontaneous potential log...
5 KB (752 words) - 13:43, 21 July 2024
of the 2-ray model is formally a special case with ν = 4 {\displaystyle \nu =4} : P L = P t d B m − P r d B m = 40 log 10 ( d ) − 10 log 10 ( G h...
15 KB (2,888 words) - 10:34, 13 June 2024
emits medium-energy gamma rays into the formation. Radioactive sources are typically a directional Cs-137 source. These gamma rays interact with electrons...
4 KB (629 words) - 20:53, 22 May 2023
Wireline (cabling) (category Well logging)
processes the gamma ray counts and sends the data uphole where it processed by a computerized acquisition system, and plotted on a log versus depth. The...
29 KB (4,325 words) - 00:54, 1 April 2024