دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: A common and inexpensive measurement of the natural emission of gamma rays by a formation. Gamma ray logs are particularly helpful because shales and sandstones typically have different gamma ray signatures that can be correlated readily between wells

n: a density log in which a gamma ray log, a Densilog, and a caliper log are recorded simultaneously.

n: one combination logging which record curve of gamma-ray logging、density logging、caliper logging，is used to compare。