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Alternative TitleTheory of Dual-porosity Media in Coal Bed Methane and Its Application
蔡强; 牛丛丛; 刘曰武; 李海生
Source Publication科技导报
Other AbstractConsidering the effects of both steady and unsteady desorption of Coal Bed Methane(CBM),two kinds of dual-porosity unsteady seepage models are developed,including pseudo-steady cross-flow model and dual-porosity unsteady cross-flow model.The two models are solved by finite volume method and their characteristic curves are analyzed by considering different geological parameters.The calculation results show that both steady desorption and unsteady desorption of CBM delay the propagation of pressure wave;the increase of CBM desorption coefficients makes the pressure draw down slowly in the coalbed,it manifests the increase of boundary distance in pressure and pressure derivative curve.For different coalbeds,when either the cross-flow flow coefficient or the fracture storage coefficient is oversize,the dual-porosity media characters in theoretical curves will be covered up.The fact is consistent with the field test data which are difficult to appear the dual-porosity media characters.Therefore the root of the problem is discovered based on the research,while the field test data is hard to show the dual-porosity media characters.
Keyword煤层气 双重孔隙介质 渗流 解吸 有限体积法
Subject Area渗流
Indexed ByCSCD
Funding Organization国家十二五科技重大专项(2011ZX05038-003)
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding Author刘曰武
Recommended Citation
GB/T 7714
蔡强,牛丛丛,刘曰武,等. 煤层中双重孔隙介质渗流理论的应用[J]. 科技导报,2012,30(24):17-22,8.
APA 蔡强,牛丛丛,刘曰武,&李海生.(2012).煤层中双重孔隙介质渗流理论的应用.科技导报,30(24),17-22,8.
MLA 蔡强,et al."煤层中双重孔隙介质渗流理论的应用".科技导报 30.24(2012):17-22,8.
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