新疆石油地质

新疆石油地质 ›› 2006, Vol. 27 ›› Issue (4): 471-473.

• 油藏工程 • 上一篇    下一篇

裂缝性低渗透油藏压力敏感性研究

郝明强1,2, 杨正明1, 刘学伟1, 刘先贵1   

  1. 1.中国科学院 渗流流体力学研究所, 河北 廊坊 065007;
    2.中国科学院 研究生院 物理科学学院, 北京 100080
  • 收稿日期:2005-10-28 修回日期:2005-12-13 出版日期:2006-08-01 发布日期:2020-10-19
  • 作者简介:郝明强(1979-), 男, 河北武邑人, 在读硕士研究生, 石油地质,(Tel) 010-69213354(E-mail) haomingq719@sina.com.

A Study on Pressure Sensitivity of Fractured Low-Permeability Reservoirs

HAO Ming-qiang1,2, YANG Zheng-ming1, LIU Xue-wei1, LIU Xian-gui1   

  1. 1. Institute of Porous Flow and Fluid Mechanics, CAS, Langfang, Hebei 065007, China;
    2. Institute of Physical Sciences, Graduate School, CAS, Beijing 100080, China
  • Received:2005-10-28 Revised:2005-12-13 Online:2006-08-01 Published:2020-10-19

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摘要： 压敏效应对含水平裂缝的低渗透油藏开发具有重要影响。随着油田开发的进行,地层压力逐渐下降,水平裂缝趋于闭合,渗透率大幅下降,严重影响了生产能力。以室内实验为基础,研究了压力变化对岩心渗透率的影响规律,分析对比了含水平裂缝的低渗透砂岩岩心与不含水平裂缝的低渗透砂岩岩心的压力敏感特征的异同,并建立了考虑压敏效应的稳态产能预测模型,用计算实例说明了压敏效应在此类油藏开发中对渗透率、压力分布、产能等生产指标的重要影响。该研究结果对含水平裂缝的低渗透油藏高效开发具有指导意义。

关键词: 压敏效应, 裂缝, 渗透率, 压力, 产能

Abstract: A pressure-sensitive effect affects unfavorably the production performance of fractured low-permeability reservoirs with horizontal fractures. With continuing an oilfield development, its formation pressure tends to decline along with the horizontal fractures being closed, the permeability drawdown and the productivity being damaged. Based on the core lab data, this paper presents the affected trend of varied pressure on core permeability, the differences of pressure-sensitive features between low-permeability sand cores with/ without horizontal fractures, and develops a model for steady-state productivity prediction considering the pressure-sensitive effect. Furthermore, the influences of pressure sensitivity on permeability, pressure distribution and productivity of such reservoirs are discussed with calculated example. These results have important instructional significance to highly efficient exploitation of fractured low permeability reservoirs with horizontal fractures.

Key words: pressure-sensitive effect, fracture, permeability, pressure, productivity

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