石油学报 ›› 2010, Vol. 31 ›› Issue (5): 791-796.DOI: 10.7623/syxb201005015

• 油田开发 • 上一篇    下一篇

特低渗透油藏压裂水平井开发效果评价

曾保全 1  程林松 1  李春兰 1  袁  帅 2   

  1. 1  中国石油大学石油天然气工程学院  北京  102249; 2  中国石油四川销售仓储分公司  四川成都  610083
  • 收稿日期:2010-02-11 修回日期:2010-05-08 出版日期:2010-09-25 发布日期:2010-11-30
  • 通讯作者: 曾保全
  • 作者简介:曾保全,男,1982年12月生,2006年毕业于西安石油大学,现为中国石油大学(北京)博士研究生,主要从事低渗透油藏开发和数值模拟研究。
  • 基金资助:

    国家自然科学基金项目(No.90210019)和教育部新世纪优秀人才支持计划(NCET-05-0108)联合资助。

Development evaluation of fractured horizontal wells in ultra-low permeability reservoirs

ZENG Baoquan 1  CHENG Linsong 1  LI Chunlan 1  YUAN Shuai 2   

  • Received:2010-02-11 Revised:2010-05-08 Online:2010-09-25 Published:2010-11-30

摘要:

通过物理模拟研究了特低渗透油藏压裂水平井产能与裂缝产能之间的关系、裂缝产能分布规律以及裂缝数量与水平井产能的关系。利用数值模拟方法,研究了压裂水平井开发特低渗透油藏技术,对压裂水平井的水平段长度、裂缝数量、裂缝间距进行了优化设计。研究表明,特低渗透油藏压裂水平井的水平段长度越短,阶段采出程度越高,含水率上升越慢,即水平段长度不宜过长;建立了固定裂缝间距和井排距时不同裂缝数量压裂水平井相对累产油和相对采出程度对比图版。重新认识了特低渗透油藏压裂水平井渗流机理。

关键词: 压裂水平井, 特低渗透油藏, 水电模拟, 水平段长度, 裂缝数量, 裂缝间距, 数值模拟

Abstract:

The present paper investigated via physical simulations the productivity relationship between fractured horizontal wells and fractures, the productivity distribution of fractures and the correlation between fracture numbers and the productivity of horizontal wells in ultra-low permeability reservoirs. Techniques involved in developing ultra-low permeability reservoirs by horizontal wells were examined via numerical simulation methods, including optimization of the horizontal section length, fracture number and spacing of horizontal wells.The results indicated that the shorter the horizontal section of a horizontal well, the higher the recovery and the lower the water cut,i.e.the shorter length of a horizontal section gives a better recovery.A comparison diagram of the relative cumulative oil production and relative recovery was established for fractured horizontal wells with fixed fracture spacing but different fracture numbers.The percolation mechanism of fractured horizontal wells in ultra-low permeability reservoirs was re-recognized.

Key words: fractured horizontal well;ultra-low permeability reservoir, hydroelectric simulation, horizontal section length, fracture number, fracture spacing, numerical simulation