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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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Radioactivity logging is the only known method of making accurate lithologic records through casing and cement. At present, radioactivity logs are used chiefly to determine exactly where to perforate the casing and cement, and the process has been highly successful in this use. Other applications consist in determining sample lag, making correlations and cross sections, locating faults, mapping subsurface structure for deeper drilling, logging beds too thin for electric logs to record, making detailed lithologic records of oil sands for use in connection with the recovery of oil by water flooding, and surveying potash deposits in cased wells. Well Surveys, Inc., has also developed a method for determining the radioactivity of cores and samples which has proved its value i interpreting the logs and in solving problems of sedimentation.
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