西南石油大学学报(自然科学版) ›› 2019, Vol. 41 ›› Issue (6): 75-86.DOI: 10.11885/j.issn.1674-5086.2019.10.15.05

• 页岩气开发专刊 • 上一篇    下一篇

页岩气水平井重复压裂关键技术进展及启示

杨兆中1, 李扬1, 李小刚1, 李成勇2   

  1. 1. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川 成都 610500;
    2. 成都理工大学能源学院, 四川 成都 610059
  • 收稿日期:2019-10-15 出版日期:2019-12-10 发布日期:2019-12-10
  • 通讯作者: 杨兆中,E-mail:yzzycl@vip.sina.com
  • 作者简介:杨兆中,1969年生,男,汉族,四川泸州人,教授,博士生导师,主要从事低渗透油气藏增产改造与油气藏数值模拟方面的教学和科研工作。E-mail:yzzycl@vip.sina.com;李扬,1989年生,男,汉族,黑龙江大庆人,博士研究生,主要从事油气田增产改造领域的研究工作。E-mail:xiaolong_0_@126.com;李小刚,1981年生,男,汉族,四川仁寿人,教授,博士生导师,主要从事油气增产领域的研究与教学工作。E-mail:swpuadam@126.com;李成勇,1981年生,男,汉族,重庆开县人,教授,主要从事复杂油气藏渗流理论及应用领域的教学和科研工作。E-mail:lichengyong1981@126.com
  • 基金资助:
    四川省科技计划项目(18YYJC1108);四川省科技计划重点研发项目(2018JZ0079)

Key Technology Progress and Enlightenment in Refracturing of Shale Gas Horizontal Wells

YANG Zhaozhong1, LI Yang1, LI Xiaogang1, LI Chengyong2   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. School of Energy Resource, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2019-10-15 Online:2019-12-10 Published:2019-12-10

摘要: 由于页岩气水平井初始增产措施的种种不利因素,产量达不到预期,加之目前低迷的油价背景,页岩气水平井重复压裂技术越来越受到页岩气资源开发的关注。随着压裂技术的不断发展,许多页岩气区块已经成功实施了这一技术,以提高生产率,并增加页岩气井的最终采收率。综述了页岩气水平井重复压裂优化选井的程序,并讨论了关键工艺技术和监测分析技术,最后,结合目前不同技术的研究现状,对今后页岩气水平井重复压裂技术的研究方向进行了展望,提出了结合“大数据”技术选井、套损变形井柔性修复、基于损伤力学的裂缝监测以及新型材料的压裂液和支撑剂等技术攻关的建议。中国页岩气资源潜力巨大,加速形成适合中国页岩气水平井重复压裂配套技术,会对未来中国页岩气商业开发起到促进作用。

关键词: 页岩气水平井, 重复压裂, 选井, 施工工艺, 监测分析

Abstract: Due to the unfavorable factors of initial stimulation treatment in shale gas horizontal wells, the output is less than expected, coupled with the current downturn in the oil price background, shale gas horizontal wells refracturing technology is increasingly concerned about the development of shale gas resources. With the continuous development of fracturing technology, many shale gas fields have now successfully implemented this technique to increase production rate and to enhance ultimate gas recovery from shale gas wells. Overviewed the procedure for candidate well identification and discussed the key fracturing techniques and operation monitoring techniques. Lastly, based on the current situation of the development of different techniques, the direction of the refracturing technique of shale gas horizontal wells were prospected. Some suggestions were put forward, such as selecting wells with "big data" technology, flexible restoration of casing damaged and deformed wells, fracture monitoring based on damage mechanics, and fracturing fluid and proppant with new materials. As China is abundant in potential shale gas reserve, to accelerate the formation of supporting technology suitable for shale gas horizontal wells refracturing in China can play a role in promoting the commercial development of shale gas in China in the future.

Key words: shale gas horizontal well, refracturing, candidate well identification, fracturing technology, operation monitoring

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