天然气地球科学

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涪陵页岩气田水平井开发效果评价

梁榜,李继庆,郑爱维,卢文涛,张谦   

  1. 中国石化江汉油田分公司勘探开发研究院,湖北 武汉 430223
  • 收稿日期:2017-07-01 修回日期:2018-01-05 出版日期:2018-02-10 发布日期:2018-02-10
  • 作者简介:梁榜(1983-),男,广西玉林人,工程师,硕士,主要从事页岩气勘探开发研究.E-mail:lb_jhyjy@163.com.
  • 基金资助:

    国家科技重大专项“涪陵页岩气开发示范工程”(编号:2016ZX05060);中国石化科技攻关项目“涪陵区块页岩油气有效开发技术研究”(编号:P13053)联合资助.

Development effect evaluation for shale gas wells in Fuling shale gasfield

Liang Bang,Li Ji-qing,Zheng Ai-wei,Lu Wen-tao,Zhang Qian   

  1. Research Institute of Exploration and Development,Jianghan Oilfield Company,Wuhan 430223,China
  • Received:2017-07-01 Revised:2018-01-05 Online:2018-02-10 Published:2018-02-10

摘要:

涪陵页岩气田自2013年成功实施开发试验井组以来,截至2017年底累计建成100×108m3/a生产能力。由于页岩气井受地质条件及工艺措施影响,生产动态与常规气井有明显不同,存在初期产能递减快、不稳定线性流时间长等问题,致使页岩气水平井试采期间难以求得准确的单位压降采气量、井控动态储量,给气田开发方案的合理编制带来很大困难。因此,在准确把握页岩气井生产特征的基础上,根据区块多口典型气井的生产数据建立了单位压降采气量、井控动态储量预测方法,能够有效预测单位压降采气量、井控储量随生产时间的动态变化规律。研究表明在保证水平段延伸方向与最大主应力方向夹角尽量小于40°,满足井间距400~600m,采用一平台六井 “丛式交叉”进行布井,能够充分利用平台及动用资源,对气田的建产规模具有指导作用,从而实现页岩气田的规模效益开发,为南方海相同类页岩气和国内外其他同类型气田经济有效开发提供借鉴。

关键词: 页岩气水平井, 开发效果评价, 生产动态分析, 开发技术政策, 涪陵页岩气田

Abstract:

Since the successful development of the shale gas test well group in Fuling shale gas field in 2013,the cumulative yearly shale gas production capacity of 10.0 billion cubic meters has been built by the end of 2017.Due to the impact of geologic conditions and technical measures on shale gas wells,the production performance of shale gas wells is significantly different from that of the conventional gas wells.The rapid decrease in initial production and long-time linear flow result in great difficulties in accurate calculation of gas production per unit pressure decrease and well-controlled dynamic reserves,and thus in proper design of gas field development scenarios.Therefore,based on the accurate grasp of the production characteristics of shale gas,the prediction method of gas production per unit pressure decrease and well-controlled reserves were set up in terms of the production data of some typical producing wells in the block,and could be used for effective prediction of the changes in gas production per unit pressure decrease and well-controlled reserves with production time.The study showed that the angle between the extension direction of horizontal section and the maximum principal stress should be as less than 40° as possible,the well spacing should be within 400-600m,and wells should be deployed as cluster cross wells in the pattern of “six wells per pad”,so as to make full use of existing platforms and available resources,to provide guidance for the construction scale of gasfield,to realize the effective large-scale development of shale gas,and to serve as a reference for the economical and effective development of southern marine shale gasfields and other gas fields of the same type at home and abroad.

Key words: Shale gas horizontal well, Development effect evaluation, Production performance analysis, Development technology policy, Fuling shale gasfield

中图分类号: 

  • TE243

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