页岩中页岩气渗流系数计算模型

姚同玉; 黄延章; 李继山

doi:10.3879/j.issn.1000-0887.2014.08.012

页岩中页岩气渗流系数计算模型

doi: 10.3879/j.issn.1000-0887.2014.08.012

¹中国石油大学石油工程学院,山东青岛 266580;²中国科学院渗流流体力学研究所,河北廊坊 065007;³胜利油田有限责任公司地质科学研究院,山东东营 257015

基金项目: 国家“十二五”科技重大专项课题“致密砂岩气有效开发与评价技术”(2011ZX05013-002)

详细信息

作者简介:
姚同玉（1976—），女，副教授，博士(通讯作者. E-mail: yaotongyu@126.com).

中图分类号: O357.3
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- 文章访问数: 848
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- 被引次数: 0
出版历程
- 收稿日期: 2013-12-11
- 修回日期: 2014-06-16
- 刊出日期: 2014-08-15

Calculation Model for the Permeability Coefficient of Shale Gas in Shale Matrix

¹School of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580, P.R.China;²Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang, Hebei 065007, P.R.China;³Geological and Scientific Research Institute of Shengli Oilfield Company Ltd., Dongying, Shandong 257015, P.R.China

摘要

摘要: 依据页岩气在页岩孔隙中的渗流行为，建立了页岩气释放、扩散耦合模型，利用Laplace变换方法，将耦合模型转化为 Laplace空间上常微分方程初边值问题，并找到了压力解析解，求得了渗透系数.实例计算验证了渗流模型及解的可靠性，丰富了页岩气不定常渗流理论.
- 页岩气 /
- Laplace变换 /
- 解析解 /
- 渗透系数
Abstract: According to the seepage behavior of shale gas in shale matrix, a coupling model for both the shale gas release and diffusion was established. With the Laplace transform method, the coupling model was converted to initial and boundary value problems of ordinary differential equations in the Laplace space. Then the analytical solution of pressure was found, and the permeability coefficient was obtained. The calculation of some specific examples prove reliability of the seepage model and correctness of the solution. The results indicate that the shale gas release process is mainly composed of two actions of adsorption and diffusion, in which the adsorption action has substantial influences on both the effective porosity and the permeability coefficient of the shales. This research enriches the unsteady seepage theory about shale gas.
- shale gas /
- Laplace transform /
- analytical solution /
- permeability coefficient

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参考文献(17)

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