天然气地球科学

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昭通国家级页岩气示范区YS108区块小井距错层开发模式探讨

黄小青,王建君,杜悦,李林,张卓   

  1. 中国石油浙江油田公司,浙江 杭州 310023
  • 收稿日期:2018-11-05 修回日期:2018-12-30 出版日期:2019-04-10
  • 作者简介:黄小青(1988-),男,安徽安庆人,工程师,硕士,主要从事油气藏工程研究.E-mail::huangxq85@pertrochina.com.cn.
  • 基金资助:
    国家科技重大专项“昭通页岩气勘探开发示范工程”(编号:2017ZX05063)资助.

Discussion on development mode of smaller well spacing and tridimensional development in the YS108 block,Zhaotong National Shale Gas Demonstration Area

Huang Xiao-qing,Wang Jian-jun,Du Yue,Li Lin,Zhang Zhuo   

  1. Zhejiang Oilfield Company,CNPC,Hangzhou 310023,China
  • Received:2018-11-05 Revised:2018-12-30 Online:2019-04-10

摘要: 针对川南山地页岩气储层具有平面稳定连续、纵向厚度大、非均质强的特点,合理的井网部署模式对于提高储量动用程度和采收率具有重要意义。为此,借鉴国内外页岩气生产经验,根据研究区静态地质特征和生产动态特征,以非常规水力裂缝模拟和数值模拟为分析手段,建立昭通国家级页岩气示范区YS108区块龙马溪组龙一段小井距错层开发模式:平面上将井距缩小至300m、纵向上龙一11小层和龙一31小层错层动用、上下2套井网开发、“拉链式”压裂、同步投产的开发模式。结果表明:该模式在研究区内试验可新增20%储量动用,提高16%的采收率,新增单井产量0.9×108m3,井间干扰是该模式应用的关键因素,采用同步投产的方式可减少井间干扰至2%以下。

关键词: 小井距, 水力裂缝模拟, 页岩气, 昭通国家级页岩气示范区

Abstract: Shale gas reservoir in mountainous areas of southern Sichuan Province is stable and continuous in plane but highly heterogeneous in vertical,so a reasonable well pattern model is significant for improving the degree of reserve utilization and gas recovery ratio.Therefore,by learning other fields’ experience in producing shale gas,and using the static geological information and dynamic production data,a development mode of smaller well spacing and horizontal well target within staggered bed is established in the  1st member of Longmaxi Formation(L1) of YS108 block in Zhaotong Area,with some analytical means such as unconventional hydro-fracture simulation and numerical simulation:The well spacing is reduced to 300 m,and the target of the horizontal wells should be in the staggered layers which are L111 and L131 horizons,so the well pattern is divided into two parts;In addition,“zipper” fracturing and synchronous production are also the important parts of this development mode.Through researching,the results show that this model can increase 20% reserves utilization,16% gas recovery ratio and 90×106m3 gas production in each single well.However,inter-well interference is the key factor to the application of this model and it can be reduced to less than 2% by synchronous production.

Key words: Smaller well spacing, Hydro-fracture simulation, Shale gas, Zhaotong National Shale Gas Demonstration Area

中图分类号: 

  • TE34
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