draw down well test

Shut in well is one of important links on well testing with injection pressure decline of coal bed gas.

井下关井是煤层气注入压降试井的重要环节之一,井下关井工具的合理使用,是确保高质量试井成果的前提,针对不同的地层条件及施工情况使用不同种类的关井工具并辅以正确的操作方法,能有效降低试井的风险性,提高试井的成功率并获得高质量、高精度的试井曲线。

Calculation and error analysis of pressure drop of gelled propellant simulants in the pipe;

凝胶推进剂模拟液直圆管压降计算及误差分析

Effect of pressure drop grading structure of feed nozzle for catalytic cracking process on atomization;

催化裂化进料喷嘴压降分级结构对其雾化效果的影响

An experiment investigation on the pressure drop for oil drop dispersed flow through horizontal pipe;

水平管内油滴分散流摩擦压降特性的实验研究

Research on carried solution and pressure fall in liquid desiccant packed towers;

液体除湿填料塔液体夹带和压降问题研究

The craft pipeline net and devices from first-order air evacuation to second-order air admission in the compressor system at Hekou compressor station are analyzed from the aspect of pressure fall at different stages, thus finding out the key to the problem of pressure fall in compressor system.

对河口压气站压缩系统的一级排气至二级进气的工艺管网和设备进行分段压降分析,从中找出压缩系统压降存在问题的关键。

Based on the continuity equation and the momentum equation, the pressure fall models of wellbore flow within an open-hole and a perforated completion snaky well bore are e.

研究了蛇曲井井筒流动特征,对蛇曲井微元段和孔眼段的流动进行了分析,根据质量守恒原理和动量定理,建立了裸眼完井和射孔完井方式下蛇曲井生产井段的井筒压降预测模型。

Analysis of influential factors of drawdown and liquid holdup in multiphase conduit flow;

多相管流中压降和持液率的影响因素分析

A coalbed gas injection or drawdown test is controlled the injection displacement by an overflow valve.

煤层气注入 /压降测试采用溢流阀控制注入排量。