新疆石油地质

新疆石油地质 ›› 2003, Vol. 24 ›› Issue (4): 341-343.

• 油藏工程 • 上一篇    下一篇

穿越多条裂缝水平井的井底压力变化特征

刘振宇1, 方亮1, 安艳明2, 翟云芳1   

  1. 1.大庆石油学院,黑龙江 大庆 163318;
    2.中国石油 大庆油田有限责任公司 第二采油厂,黑龙江 大庆 161318
  • 收稿日期:2002-12-10 修回日期:2003-02-09 发布日期:2021-01-13
  • 作者简介:刘振宇(1964-),男,黑龙江齐齐哈尔人,副教授,石油工程。联系电话:0459-6503415

Pressure Behavior of Horizontal Well with Multiple Transversal Fractures

LIU Zhen-yu1, FANG Liang1, AN Yan-ming2, ZAI Yun-fang1   

  1. 1. Daqing Petroleum Institute, Daqing, Heilongjiang 163318, China;
    2. No.2 Oil Production Plant, Daqing Oilfield Co. Ltd, PetroChina, Daqing, Heilongjiang 161318, China
  • Received:2002-12-10 Revised:2003-02-09 Published:2021-01-13

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摘要： 研究了水平井在穿越多条裂缝条件下的渗流规律。在假设各裂缝流量不相等的条件下,给出了地层及裂缝内的压力分布公式,在假设各裂缝流量相等的条件下,绘制了井底压力理论曲线。理论曲线表现出3个流动时期的流动特点,即,早期裂缝线性流,地层向裂缝和裂缝向井筒的不稳定流和系统趋向于平衡的稳定流,同时表明了裂缝长度和间距对压力的影响。研究还表明,穿越多条裂缝的水平井在早期的井底压力特征与垂直裂缝直井的情况相似。

关键词: 裂缝, 水平井, 井底压力, 变化, 渗流, 低渗透油田

Abstract: The flow mechanism of Horizontal well with multiple transversal fractures is studied. Under the assumption of variable flow rate between transversal fractures, theoretical curves of bottom hole pressure are given, which show flow characteristics of three periods: the first one represents the linear flow in fractures; the second one the instantaneous flow from strata to fractures and from fractures to the wellbore; and the third one the stable flow of the system equilibrium. They also indicate the effects of fracture length and fracture spacing on the wellbore pressure. In addition, study shows that at early stage, the bottom hole pressure behavior of horizontal well with multiple transversal fractures is similar with that of vertical well with vertical fractures.

Key words: fracture, horizontal well, percolation, low permeability reservoir

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