石油学报 ›› 2009, Vol. 30 ›› Issue (5): 731-734.DOI: 10.7623/syxb200905017

• 油田开发 • 上一篇    下一篇

低渗透储层非线性渗流模型研究

时宇1,3, 杨正明1,2,3, 黄延章1,3   

  1. 1. 中国科学院渗流流体力学研究所, 河北廊坊 065007;
    2. 中国石油勘探开发研究院廊坊分院, 北京 102249;
    3. 中国石油大学石油天然气工程学院, 河北廊坊 065007
  • 收稿日期:2008-12-04 修回日期:2009-02-11 出版日期:2009-09-25 发布日期:2010-05-21
  • 作者简介:时宇,男,1980年10月生,2005年获西安石油大学硕士学位,现为中国科学院渗流流体力学研究所在读博士研究生,主要从事油藏工程和储层评价方面研究.E-mail:shiyuywy@126.com
  • 基金资助:
    国家重点基础研究发展规划(973)项目(2007CB209500);中国石油天然气股份有限公司科技项目(08-02A-02-02)联合资助

Study on non-linear seepage flow model for low-permeability reservoir

SHI Yu1,3, YANG Zhengming1,2,3, HUANG Yanzhang1,3   

  1. 1. Institute of Porous Flow and Fluid Mechanics, China Academy of Sciences, Langfang 065007, China;
    2. Faculty of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;
    3. Langfang Branch, PetroChina Exploration and Development Research Institute, Langfang 065007, China
  • Received:2008-12-04 Revised:2009-02-11 Online:2009-09-25 Published:2010-05-21

摘要: 依据毛管模型及边界层理论,建立了非线性渗流模型.同时利用恒速压汞实验确定了大庆低渗透油田喉道分布密度函数.应用非线性渗流模型与喉道密度分布函数,对低渗透储层中产生非线性渗流的压力梯度区域进行了准确界定,并对影响非线性渗流的因素进行了定量分析.结果表明,在非线性渗流过程中储层渗透率与启动压力梯度均为变量,二者是产生非线性渗流的主要因素.其中,渗透率的影响程度较大,但产生影响的范围较窄;而启动压力梯度的影响程度相对较小,而影响范围较大.

关键词: 低渗透油藏, 非线性渗流, 恒速压汞实验, 启动压力梯度, 喉道密度分布函数, 渗透率, 渗流模型

Abstract: On the basis of the classic capillary model and boundary layer theory,the non-linear seepage flow model for the low-permeability reservoir was established.The density function of throat distribution in Daqing low-permeability reservoir was determined by the constant-rate mercury injection experiment.The non-linear seepage flow model and the throat density distribution function were used to calculate the pressure gradient range of non-linear seepage flow in the low-permeability reservoir.The factors impacting the non-linear seepage flow were also quantitatively analyzed.The results showed that the co-operation of permeability and startup pressure gradient resulted in the non-linear seepage flow.The permeability has greater impact degree and smaller impact range than the startup pressure.

Key words: low-permeability reservoirs, non-linear seepage flow, constant-rate mercury injection experiment, startup pressure gradient, throat density distribution function, permeability, seepage flow model

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