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力学与实践 ›› 2011, Vol. 33 ›› Issue (1): 66-69.doi: 10.6052/1000-0879-lxysj2010-069

• 应用研究 • 上一篇    下一篇

低渗油层压裂水平井两相流研究

姚同玉1,王明2,朱维耀3,李继山4   

  1. 1. 山东东营中国石油大学
    2.
    3. 北京市海淀区学院路30号北京科技大学土木与环境工程学院
    4. 胜利油田有限责任公司 地质科学研究院
  • 收稿日期:2010-02-26 修回日期:2010-06-12 出版日期:2011-02-15 发布日期:2011-03-03
  • 通讯作者: 姚同玉 E-mail:yaotongyu@126.com

ANALYSIS OF TWO-PHASE PERCOLATION OF FRACTURED HORIZONTAL WELLS IN LOW PERMEABILITY OIL RESERVOIRS

  • Received:2010-02-26 Revised:2010-06-12 Online:2011-02-15 Published:2011-03-03

摘要: 依据压裂水平井不同流动区域的流动规律, 将压裂水平井的渗流分为裂缝中的高速非达西流 动区、裂缝控制影响的椭圆渗流区、远离裂缝的基质非达西渗流区, 考虑启动压力梯度的影 响, 对压裂水平井两相渗流进行了分析, 得到了低渗透油层压裂水平井的产量公式. 研究结 果表明, 裂缝的导流能力越大, 压裂水平井的产量越高. 但随着开采时间的增加, 其产量递减幅度越 大; 压裂裂缝长度越小, 压裂水平井的初始产量越高. 但随着生产时间的推移, 压裂裂缝的 长度越大, 产量的递减幅度越小; 中间裂缝长, 两翼裂缝短的情况下, 压裂水平井的产量最 高.

关键词: 低渗透

Abstract: According to flow characteristics of different flow areas of fractured horizontal wells in low permeability oil reservoirs, the vadose region of fractured horizontal wells can be divided into three districts, the non-Darcy flow district with a high speed controlled by cracks, the ellipse flow district and the matrix non-Darcy flow district. Two-phase porous flow mathematical models of matrix non-Darcy flow with start-up pressure gradient are built. The results indicate that the production goes with the increase of fracture conductivity; the incremental scope of production decreases with the increase of production time; initial production of fractured horizontal decreases progressively with the increase of fracture length, the incremental scope of production decreases with the increase of fracture length; the production of fractured horizontal wells is the maximum in the situation with a long median crack and a short two-way crack.

Key words: Low permeability