دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

an isotope tracer in a bead with the same density of the flowing fluid that is used to track fluid flow rates and therefore fluid entry and exit points along the wellbore.

n: see radioactive tracer.

uses porosity, density and/or tracer tools to determine presence of gravel and placement of gravel type between the screen and the hole or casing.

a material such a grain, dye, flakes or other material that can be circulated with the mud to track how quickly and to what extent the hole is circulated.

n: a gas, liquid, or solid material that emits gamma rays.

n: an isotope of the element iodine, which is radioactive and which is sometimes used as a radioactive tracer.

applying a washable or non-washable radioactive tracer to equipment or proppant to allow tracking of position of the tagged item in the well. Can be used to determine if radioactive tagged sand entered the formation at a specific set of perforations.

n: a radioactive material (often carnotite) put into a well to allow observation of fluid or gas movements by means of a tracer survey.

n: a kind of radioactive substance added into the cement slurry or well ,used as detection sign during tracer survey.

a very low strength radioactive isotope used to tag water or other fluid for tracing the path of fluid in the reservoir or in a well.

n: oil well cement with radioactive tracer ,able to detecte the cement out of the casing or the snubbing cementing situation and the leaker on the casing

a log device that emits a burst of tracer and tracks its movement. May “see” a foot or so outside casing in good circumstances. Normal for injection wells.