页岩气藏渗流机理及压力动态分析

计算物理 ›› 2015, Vol. 32 ›› Issue (1): 51-57.

页岩气藏渗流机理及压力动态分析

杜殿发, 王妍妍, 付金刚, 孙召勃, 乔妮

中国石油大学(华东)石油工程学院, 山东青岛 266580

收稿日期:2013-12-30 修回日期:2014-06-13 出版日期:2015-01-25 发布日期:2015-01-25
作者简介:杜殿发(1972-),男,博士,教授,主要从事油气田开发等研究及教学工作,E-mail:dudf@upc.edu.cn
基金资助:
中国石油科技创新基金(2011D-5006-0210)资助项目

Shale Gas Seepage Mechanism and Transient Pressure Analysis

DU Dianfa, WANG Yanyan, FU Jingang, SUN Zhaobo, QIAO Ni

College of Petroleum Engineering in China University of Petroleum, Shandong Qingdao 266580, China

Received:2013-12-30 Revised:2014-06-13 Online:2015-01-25 Published:2015-01-25

摘要/Abstract

摘要： 针对页岩气藏的特点,分析国内外对解吸、扩散等数学描述方法,建立三种机理作用下的渗流数学模型:①考虑有机基质表面解吸,解吸气和游离气共同窜流的数学模型;②考虑有机基质解吸和扩散的数学模型;③考虑有机基质中的气体解吸、扩散,以及无机基质中气体窜流综合作用的数学模型.运用点源函数方法,得到模型的基本点源解,对点源解作积分变换得到垂直压裂井、压裂水平井两种开采方式下的地层压力解,绘制出三种机理影响下的压力动态曲线,并从渗流机理上分析曲线特征以及不同曲线存在差异的原因.

关键词: 页岩气藏, 渗流机理, 渗流模型, 试井分析

Abstract: According to characteristic of shale gas reservoir,mathematical description methods of diffusion and desorption are analyzed.Three seepage models controlled by different kinds of seepage mechanisms are built:① a mathematical model which considers diffusion and interporosity of desorbed gas and free gas,② a mathematical model which considers desorption and diffusion,③ a mathematical model which considers desorption and diffusion in organic porosity and interporosity in inorganic porosity.With modified Lord Kelvin point source function pressure solutions are botained.With corresponding transformation for point source functions,formation pressure solutions for vertical fractured well and fractured horizontal well are obtained and typical curves are shown.At last,characteristics of different curves and three mechanisms' influences on pressure are analyzed.

Key words: shale reservoir, seepage mechanism, mathematical model, well test analysis

中图分类号:

TE33

杜殿发, 王妍妍, 付金刚, 孙召勃, 乔妮. 页岩气藏渗流机理及压力动态分析[J]. 计算物理, 2015, 32(1): 51-57.

DU Dianfa, WANG Yanyan, FU Jingang, SUN Zhaobo, QIAO Ni. Shale Gas Seepage Mechanism and Transient Pressure Analysis[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2015, 32(1): 51-57.

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