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| 基于双重逾渗模型的裂隙多孔介质连通性研究 | |
| Alternative Title | STUDY OF CONNECTIVITY OF FRACTURED POROUS MEDIA BASED ON DUAL-PERCOLATION MODEL |
郑委 ; 鲁晓兵; 刘庆杰; 张旭辉
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| Source Publication | 岩石力学与工程学报
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| 2011 | |
| Volume | 30Issue:6Pages:1289-1296 |
| ISSN | 1000-6915 |
| Abstract | 孔隙和裂隙是裂隙多孔介质的2种渗流通道。在低渗和特低渗情况下,孔隙和裂隙能否构成贯穿的通道,决定介质能否发生渗流。针对低渗和特低渗裂隙多孔介质的连通性,结合孔隙逾渗理论和裂隙逾渗理论,提出一种双重逾渗模型。基于该模型,提出能够反映和比较裂隙多孔介质连通性的2个量化参数A_0和D,并重点讨论这2个量化参数物理意义。根据A_0和D这2个参数分析裂隙多孔介质的连通性特征。分析结果表明,以D=2为临界值,可以将裂隙多孔介质分为3种类型:"弥散型"、"临界型"、"指向型"。当D>2时,介质具有自封闭趋势,属于"指向型";随着孔隙连通和裂隙方向随机性的增强,这种自封闭趋势会被破坏,使介质趋向于"弥散型",即利于连通。少量长裂隙的存在对介质的连通性起决定作用。 |
| Other Abstract | Pores and fractures are two main flow channels in fractured porous media.Under low and ultra-low permeability conditions,whether seepage occurs in media or not is decided by whether pores and fractures can form a penetrated channel or not.A dual-percolation model coupled the pore percolation theory and the fracture percolation theory is presented to study the conductivity of the low and ultra-low fractured porous media.Based on the presented dual-percolation model,two parameters and D are presented to reflect and compare the conductivities of fractured porous media;and the physical meaning of these two parameters is quantitatively discussed.The connectivity of low and ultra-low permeability fractured porous media is investigated based on these two parameters.It is shown that the low and ultra-low permeability fractured porous media can be generally divided into three types by taking as the critical value,i.e.dispersion type,critical type,and directional type.Media are self-sealing when and they can be named as directional type.However,with the enhancements of randomnesses of porous connectivity and fracture directions,the self-sealing tendency will be destroyed and the conductivity will increase,which causes the media tending to become dissipation type.A few long fractures can play a great role on the connectivity of media. |
| Keyword | 岩石力学 双重逾渗 连通性 裂隙逾渗 孔隙逾渗 |
| Subject Area | 力学 |
| URL | 查看原文 |
| Indexed By | EI ; CSCD |
| Language | 中文 |
| Funding Organization | 国家重点基础研究发展计划(973)项目(2006CB705800) |
| CSCD ID | CSCD:4283572 |
| Department | LMFS海洋土力学(LHO) |
| Citation statistics |
Cited Times:5[CSCD]
[CSCD Record]
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| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/45053 |
| Collection | 水动力学与海洋工程重点实验室(2009-2011) |
| Corresponding Author | 郑委 |
| Recommended Citation GB/T 7714 | 郑委,鲁晓兵,刘庆杰,等. 基于双重逾渗模型的裂隙多孔介质连通性研究[J]. 岩石力学与工程学报,2011,30,6,:1289-1296. |
| APA | 郑委,鲁晓兵,刘庆杰,&张旭辉.(2011).基于双重逾渗模型的裂隙多孔介质连通性研究.岩石力学与工程学报,30(6),1289-1296. |
| MLA | 郑委,et al."基于双重逾渗模型的裂隙多孔介质连通性研究".岩石力学与工程学报 30.6(2011):1289-1296. |
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