煤层气井试井工艺

Well Testing Technology of Coal Bed Gas Well

武楗棠 陈书庆 胡广振

中原石油勘探局

Materials Supply Company , Zhongyuan Petroleum Exploration Bureau , Henan 457001 ,P. R. China

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。

Defining the economic feasibility of a coal bed gas well, it is necessary to estimate the production of the coal bed. Before the well is fractured & put into production. The reservoir data of the estimate acquire from the testing well. There are many methods on the coal bed gas testing, The injection & pressure drop method is more used in oversea at present , It is a testing of a single well instantaneous pressure change , the most key factor is the design of injecting capacity & pressure. This paper introduce the frequently used parameter’s calculation methods of injection & pressure drop , the pipe structure and ground equipment of the open hole well & cased well , and simply introduce the principle , the construction process and so on.