石油学报 ›› 2006, Vol. 27 ›› Issue (2): 77-79,84.DOI: 10.7623/syxb200602016

• 油田开发 • 上一篇    下一篇

低渗透油藏水驱采收率计算新方法

牛彦良1,2, 李莉2, 韩德金2, 周锡生2   

  1. 1. 中国石油大学石油天然气工程学院, 北京, 102249;
    2. 大庆油田有限责任公司勘探开发研究院, 黑龙江, 大庆, 163712
  • 收稿日期:2005-04-15 修回日期:2005-07-19 出版日期:2006-03-25 发布日期:2010-05-21
  • 作者简介:牛彦良,男,1962年9月生,1984年毕业于长春地质学院,现为大庆油田勘探开发研究院副院长,高级工程师,中国石油大学(北京)石油天然气工程学院在读博士研究生,主要从事油田开发工作.E-mail:niuyanliang@petrochina.com.cn
  • 基金资助:
    国家“九五”重点攻关项目(95-109)部分成果

A new method for calculating recovery factor of water drive in low-permeability reservoir

Niu Yanliang1,2, Li Li2, Han Dejin2, Zhou Xisheng2   

  1. 1. Faculty of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;
    2. Exploration and Development Research Institute, Daqing Oilfield Company Limited, Daqing 163712, China
  • Received:2005-04-15 Revised:2005-07-19 Online:2006-03-25 Published:2010-05-21

摘要: 分析了影响井网系数、驱油效率和波及系数的因素,结合非达西渗流理论,对低渗透油藏水驱采收率计算方法进行了研究.结果表明,对于低渗透储层,由于启动压力梯度的存在,不能全部有效动用井网控制储量,在井网系数中引入了有效驱动程度.水驱油效率是驱替压力梯度的函数,随井网密度的增大而增大;平面波及系数是注水方式、裂缝走向夹角及裂缝相对长度的函数.用该方法计算的水驱采收率与低渗透油藏动态比较吻合.该方法适合于测算低渗透油藏水驱采收率.

关键词: 低渗透油藏, 井网系数, 驱油效率, 波及系数, 油气采收率, 非达西渗流理论

Abstract: The factors affecting coefficient of well pattern,oil-water displacement efficiency and sweep efficiency were analyzed.The methods for calculating recovery factor of water drive in low-permeability reservoirs were investigated with the theory of non-Darcy fluid flow.Because there is a kickoff pressure gradient in low-permeability reservoirs,reserves controlled by well-pattern can not be fully efficiently developed.The degree of efficient flooding is introduced into the coefficient of well pattern.The oil-water displacement efficiency is the function of displacement pressure gradient and furthermore increases with the rise of well spacing density.Lateral sweep efficiency is the function of injection-and-production system,angles between direction of injection and fractures,and the relative length of fractures.The recovery factor of water drive calculated by this method coincides with the data of reservoir performance.This method is reliable for the calculation of water drive recovery factor of low-permeability reservoirs.

Key words: low-permeability reservoir, well-pattern coefficient, oil displacement efficiency, sweep coefficient, oil-gas recovery factor, non-Darcy fluid flow theory

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