دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v: to relate subsurface information obtained from one well to that of others so that the formations may be charted and their depths and thicknesses noted. Correlations are made by comparing electrical well logs, radioactivity logs, and cores from different wells.

to compare logging and core or other information and account for discrepancies.

n: a special radioactivity log for open-hole surveying that responds to variations in the specific gravity of formations. It is a contact log (i.e., the logging tool is held against the wall of the hole). It emits neutrons and then measures the secondary gamma radiation that is scattered back to the detector in the instrument. The density log is an excellent porosity-measure device, especially for shaley sands. Some trade names are Formation Density Log, Gamma- Gamma Density Log, and Densilog.

one of a number of logging techniques that estimate the density of the formation.

n: a systematic recording of data, such as a drillers log, mud log, electrical well log, or radioactivity log. Many different logs are run in wells to discern various characteristics of downhole formation. v: to record data.

n: a systematic recording of data (e.g. drillers log,electric log,etc).

a systematic recording of data from a well.

n: a cross section of a reservoir or part of a reservoir constructed with electric or radioactivity logs.

n: see radioactivity log.

radioactivity log.

n: see radioactivity well logging.

n: refer to radioactivity logging

n: usually, a gamma ray curve, but could also refer to any logging curve obtained by radioactivity logging.

n: a record of the natural or induced radioactive characteristics of subsurface formations. Also called nuclear log. See radioactivity well logging.

n: a kind of logging method in which the layer situation is detected ,Usually refers to the natural gamma logging but sometime refers to density logging,neutron Brons logging,neutron lifetime logging

n: the recording of the natural or induced radioactive characteristics of subsurface formations. A radioactivity log, also known as a radiation log or a nuclear log, normally consists of two recorded curves: a gamma ray curve and a neutron curve. Both help to determine the types of rocks in the formation and the types of fluids contained in the rocks.