Research and application of jet pump technology in drainage gas recovery of shale gas at atmospheric pressure

Wang Yuhai; Xia Haibang; Bao Kai; Qiu Weidong

doi:10.13809/j.cnki.cn32-1825/te.2019.01.016

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Research and application of jet pump technology in drainage gas recovery of shale gas at atmospheric pressure
Vol. 9, Issue 1, Pages: 80-84(2019)
Published：2019
DOI： 10.13809/j.cnki.cn32-1825/te.2019.01.016
稿件说明：

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DOI：

Wang Yuhai, Xia Haibang, Bao Kai, et al. Research and application of jet pump technology in drainage gas recovery of shale gas at atmospheric pressure[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(1): 80-84. DOI： 10.13809/j.cnki.cn32-1825/te.2019.01.016.

摘要

彭水区块属于典型的常压页岩气藏

原始地层压力系数偏低

压裂改造后通常需借助人工举升方式进行开采。初期优选电潜泵进行排水采气

排水工艺技术单一

生产过程中地层能量逐步下降

地层供液逐步减弱且产液含砂、黏土颗粒等杂质

电潜泵工艺很难实现稳定连续排采

作业频繁、生产成本高。为了解决常压页岩气井排水采气中遇到的问题

研究应用了射流泵工艺

并对射流泵工艺参数、配套工艺进行了优化

形成了一套适合常压页岩气排水采气的射流泵工艺

从而有效指导了常压页岩气生产。

Abstract

Pengshui block is a typical shale gas reservoir at atmospheric pressure which has lower coefficient of original formation pressure

and usually needs artificial lift recovery after fracturing. In the initial stage

we optimized the electric submersible pump for the drainage gas recovery. This technology was simple

meanwhile

the formation energy declined gradually

the formation liquid supply gradually decreased and the recovered fluid contained impurities such as sand and clay particle

so that it was hard to realize the stable continuous drainage and recovery

and had complex operation precess and high production cost. In order to solve these problems

we researched and applied the jet pump

and optimized the technology parameters and matching technology. At last

we formed a set of jet pump technology suitable for the drainage gas recovery of shale gas at atmospheric pressure to effectively guide the pressure of shale gas recovery.