دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the process of recording the acoustic characteristics of sub- surface formations, based on the time required for a sound wave to travel a specific distance through rock. The rate of travel depends on the composition of the formation, its porosity, and its fluid content. Also called sonic logging.

n: false influence on well logging measurement caused by the borehole environment, e.g., diameter, shape, rugosity, type of fluid, or mud cake.

n: The distortion of borehole log due to the change of diameter and shape of wellbore or drilling fludi invasion.

n: Logging in the cased hole, for example, cement bond log, casing caliper log, casing coupling log and other well loggings.

n: an acoustic survey or sonic-logging method that records the quality or hardness of the cement used in the annulus to bond the casing and the formation. Casing that is well bonded to the formation transmits an acoustic signal quickly;poorly bonded causing transmits a signal slowly. See acoustic survey. acoustic well logging.

n: See cement bond log.

a well log that is designed to correct for an effect associated with the borehole.

n: a small-diameter conductive line used in electric wireline operations, such as electric well logging and perforating, in which the transmission of electrical current is required. Compare wireline.

n: A small-diameter wireline that carries electric current. This is used for logging tools and steering tools.

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: Compare and analyse several logging trace to acquire preciser explanation and decision about geological condition.

the zero depth datum for well logging.