煤层气井解堵技术研究

Study on the Technology of Coal Seam Gas Well

由于煤储层较疏松,在煤层气生产过程中,常会产生大量煤屑,造成煤储层和井筒堵塞,影响煤层气产能的正常释放。表面活性剂可以降低煤屑与水的界面张力,使煤屑易被地层水携带到地面,达到解堵的目的。本文通过室内实验对表面活性解堵剂进行了优选。

As the coal reservoirs are loose, a large amount of coal shavings often occur during the production of coalbed methane, resulting in the blockage of coal reservoirs and wellbores and affecting the normal release of CBM production capacity.Surfactants can reduce the interfacial tension between coal and water, so that the coal can easily be carried to the ground by the formation water to achieve the purpose of plugging. In this paper, surface active plugging agent was optimized through laboratory experiments.