中国页岩气排采工艺的技术现状及效果分析
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摘要:中国页岩气排采工艺的技术现状及效果分析 张宏录，刘海蓉 中国石油化工集团公司华东石油局工程院 摘要： 在页岩气开发过程中，页岩气排采工艺是提高页岩气开发水平的关键技术，常用的泡沫排水采气、气举排水采气、电潜泵排水采气及有杆泵排水采气等技术都有一..
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中国页岩气排采工艺的技术现状及效果分析 张宏录，刘海蓉 中国石油化工集团公司华东石油局工程院 摘要： 在页岩气开发过程中，页岩气排采工艺是提高页岩气开发水平的关键技术，常用的泡沫排水采气、气举排水采气、电潜泵排水采气及有杆泵排水采气等技术都有一定的应用条件和缺陷。因此，优选合适的页岩气排采工艺就显得尤为重要。为此，通过分析我国页岩气排采井工艺选择的原则和排采工艺方式以及气举气源及气举方式的对比，重点论述、分析了目前国内已投产的5口页岩气井气举方式及排采效果，提出了对不同页岩气排采工艺的认识。研究结果表明：气举是页岩气（致密砂岩气）的首选排采工艺，气举气源主要有膜制氮气天然气，采用套管气举方式的排采效果优于油管气举方式；泡沫排采工艺适应于产液量低于10 m3的排采井；电潜泵排采工艺只适应于高液量页岩气井的排采。 关键词： 页岩气 工艺 气举排采 泡沫排采 电潜泵排采 现状 分析 State of the art and effects of dewatering & recovery of shale gas in China Zhang Honglu , Liu Haiyong Engineering Design & Research Institute of Sinopec East China <Huadong> Branch, Nanjing, Jiangsu 210031, China Abstract: The common dewatering & recovery technologies by use of foam, gas lifting, electrical submersible pump and rod pump have their own specific application conditions and different shortcomings, so it is important to select and optimize a proper dewatering & recovery technology, in order to improve shale gas development. In view of this, based on the analysis of the principles and methods of selecting shale gas dewatering & recovery technologies as well as the selection of gas sources and methods of gas lifting, this paper discusses and analyzes the gas lifting methods and dewatering & recovery effects of five shale gas wells which have been put into production, and compares various dewatering & recovery technologies of shale gas. The following conclusions are drawn. (1) Gas lifting is the first choice for shale gas (tight gas) development with membranemade nitrogen and natural gas as its main gas sources. (2) Gas lifting through casing is better than that through tubings. (3) The foam dewatering & recovery technology is suitable for shale gas wells with liquid production of ＜10 m3/d, while the electrical submersible pump dewatering & recovery technology is only for shale gas wells with high liquid production. Keywords: shale gas, technology, gas lifting dewatering & recovery, electrical submersible pump dewatering & recovery, status, analysis 收稿日期 修回日期 网络版发布日期 DOI: 10.3787/j.issn.1000-0976.2012.12.009 |
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