论文部分内容阅读
对于煤层气井的生产开发来说 ,要确定一口煤层气井的经济可行性 ,在该井压裂和投产 (包括试采 )前 ,必须对该煤层的生产潜力进行评价 ,评价所需的储层数据可从试井中取得。煤层气试井方法很多 ,目前国内外使用较多的是注入 /压降法。注入 /压降法试井是一种单井压力瞬变测试 ,注入排量和压力是其设计最关键的因素。文中简述了该方法的原理、施工步骤及优缺点 ,并给出了注入 /压降法试井常用参数的计算方法、常用的裸眼井和套管井下井管柱结构和地面设备。
For the production and development of CBM wells, to determine the economic feasibility of a CBM well, the production potential of the coal seam must be evaluated before the well is fractured and put into production (including trial production) to evaluate the required reservoir data Available from well test. CBM well test methods are many at home and abroad to use more injection / pressure drop method. Injection / pressure drop test Well is a single well pressure transient test, injection displacement and pressure is the most critical factor in its design. The principle, construction procedure, advantages and disadvantages of this method are briefly introduced in this paper. The common parameters of injection well / pressure drop test are given, and the commonly used open hole and cased hole well string structure and ground equipment are given.