دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a well drilled to confirm and evaluate the presence of hydrocarbons in a reservoir that has been found by a wildcat well.

additional wells drilled after a discovery, to confirm the size of a hydrocarbon deposit. Normally used to run buildup tests, drill stem tests, top and bottom of formation, gather core or fluid samples or other evaluations.

n: a bucket of water into which air from the drill stem is blown through a hose during the first low period of a drill stem test. In drill stem testing, the flow into the bubble bucket is an easy way to judge flow and shut-in periods.

v: to pull the drill stem out of the wellbore to change the bit, to change from a core barrel to the bit, to run electric logs, to prepare for a drill stem test, to run casing, and so on. Also called trip out.

n: See trip.

n: a quantity of water, drilling fluid, or compressed gas placed inside drill pipe or tubing to control both annular and formation pressures. Usually mud in the pipe or tubing supports prevents the pipe or tubing from collapsing;mud also holds back formation pressure pushing up the pipe or tubing. But sometimes, such as in drill stem testing, it is necessary to have empty pipe or tubing downhole. The cushion protects the pipe or tubing until it is in place. It also allows control of the rising formation pressure as the cushion is removed, as in drill stem testing, to prevent formation damage.

n: The definite water, drill fluid or compressed gas poured into drill pipe or oil tube.

n: (DST) the conventional method of formation testing. The basic drill stem test tool consists of a packer or packers, valves or ports that may be opened and closed from the surface, and two or more pressure-recording devices. The tool is lowered on the drill string to the zone to be tested. The packer or packers are set to isolate the zone from the drilling fluid column. The valves or ports are then opened to allow for formation flow while the recorders chart static pressures. A sampling chamber traps clean formation fluids at the end of the test. Analysis of the pressure charts is an important part of formation testing.

n: during drilling or affter well completation ,lower the drillstem tester into the layer to make the pressure build up test so as to eatimate the layers and the fluid parameters

n pi: formation gases that are produced during a drill stem test, which is the conventional method of testing formations. Although these gases typically are produced only in very small quantities and consist mainly of natural gas, they become an environmental concern when the gases fall into the extremely hazardous substance category under SARA and are produced in sufficient quantities so that they exceed the TPQ limit set for that substance. Typically, wells are not set up for production operations when the drill stem test is run;consequently, gas-containment equipment is not installed or operational during the running of the test and such gases must be released or flared.

abbr: drill stem test.

Drill Stem Test.

n: drill stem test tool;used for formation evaluation.

n: a kind of valve joined to the top of the drill stem test tool ,and can be closed two times using the rotation of the drill pipe