A drill stem test (DST) is a procedure for isolating and testing the pressure, permeability and productive capacity of a geological formation during the drilling of a well.

2022年1月24日 · A drill stem test (DST) is a temporary completion of a wellbore that provides information on whether or not to complete the well. The zone in question is sealed off from the rest of the wellbore by packers, and the formations' pressure and fluids are measured.

Well tests conducted with the drillstring still in the hole. Often referred to as DST, these tests are usually conducted with a downhole shut-in tool that allows the well to be opened and closed at the bottom of the hole with a surface-actuated valve.

2018年1月12日 · Drill stem test (DST) is the conventional method of formation testing and reservoir evaluation which obtains reservoir data under dynamic (rather than static) conditions.

2022年2月17日 · A drill-stem test, or DST, is the most common method to measure reservoir pressure. DSTs are the most reliable reservoir pressure measurement method if sufficient time elapses during the test for the higher formation pressure to …

2018年1月14日 · This chart is produced by mechanical recorders and/or electronic pressure/temperature gauges. The data derived from the Drill Stem Test (DST) give a computation of the formation’s permeability, damage ratio, productivity index, transmissibility and radius of investigation.

What is a Drill Stem Test (DST)? A DST is a temporary well test performed during the drilling phase to assess the productivity of a potential hydrocarbon-bearing formation. It involves lowering a specialized tool, known as a DST tool, down the drill string to the desired depth.

This testing employs multi-cycle testers lowered into the well on drill pipes. It involves sampling fluid from the formation and continuously recording pressure and temperature using electronic gauges in the sub-packer and over-packer zones.

Drill-stem testing (DST) is one of the most important completion techniques. It is a type of temporary completion that is used to evaluate the formation and inspect a reservoir’s properties.

What is a Drill Stem Test (DST)? The isolation of an interval of interest (part of a reservoir formation or multiple formations) using one or more packers to produce reservoir fluid through a temporary production tubing or drill pipe (work string).