دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a description of the hindrance caused to flowing fluids as they attempt to enter the wellbore from a fracture or the formation. Also used to describe the deviation of the wellbore from a smooth path.

n: (TD) the maximum depth reached in a well.

n: The planned end of a well, measured by the length of pipe required to reach the bottom.


the maximum depth of a well measured along the wellbore.

n: a survey that uses a radioactive tracer such as a gas, liquid, or solid having a high gamma ray emission. When the material is injected into any portion of the wellbore, the point of placement or movement can be recorded by a gamma ray instrument. The tracer log is used to determine channeling or the travel of squeezed cement behind a section of perforated casing. Also called tracer survey.

a log that uses radioactive tracer to monitor fluid movement in the wellbore or measure losses from the wellbore.

n: the path of the wellbore.

a short lived state. Generally used describing reservoirs during production as pressure is progressively drawn down near the wellbore and slowly permeates the rock outward.

a fluid that separates two incompatible fluids during well cleanout and prepares the wellbore for the next fluid.

n: the operation of hoisting the drill stem from and returning it to the wellbore. v: shortened form of make a trip." See make a trip, overspeed governor.

n: The complete operation of removing the drillstring from the wellbore and running it back in the hole. This operation is typically undertaken when the bit becomes dull or broken, and no longer drills the rock efficiently.


pulling all pipe from the well and rerunning the pipe to bottom.

n: The slight gas of wellbore come from layer when trip in .

gas that enters the wellbore during a trip of the drilling string. May be due to swabbing and/or lowering the mud equivalent circulating density during pump shutdowns.

v: to come out of the hole.

n: To remove the drillstring from the wellbore.


pull a string of tubing or drill pipe out of the hole.