| 低渗气藏岩石渗透率有效应力系数研究 |
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| 引用本文： | 李丽君,李闽,向祖平,唐志宏.低渗气藏岩石渗透率有效应力系数研究[J].重庆科技学院学报(自然科学版),2010,12(6). |
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| 作者姓名： | 李丽君 李闽 向祖平 唐志宏 |
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| 作者单位： | 西南石油大学国家重点实验室,成都,610500;中石化西南油气分公司勘探开发研究院,成都,610000;中海油服钻井事业部湛江分公司936平台,湛江,524000 |
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| 摘 要： | 根据修正的析因设计方案,开展三个回路的变孔隙流体压力实验,采用最大似然函数法、Bernabe法和Brace法进行实验数据处理。结果表明:升高孔隙流体压力时的有效应力系数小于降低孔隙流体压力时的有效应力系数;三种处理方法中,根据最大似然函数法计算出的有效应力与渗透率的二次多项式拟合关系最好;岩石的有效应力系数为1.02,从实验角度证实了Kwon相关结论。
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| 关 键 词： | 低渗气藏岩石 有效应力 渗透率 有效应力系数 最大似然函数法 |
Effective-stress Coefficient for Rocks Permeability in Low-permeability Gas Reservoir |
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| LI Li-jun,LI Min,XIANG Zu-ping,Tang Zhi-hong.Effective-stress Coefficient for Rocks Permeability in Low-permeability Gas Reservoir[J].Journal of Chongqing University of Science and Technology:Natural Science Edition,2010,12(6). |
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| Authors: | LI Li-jun LI Min XIANG Zu-ping Tang Zhi-hong |
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| Affiliation: | LI Li-jun1 LI Min1 XIANG Zu-ping2 Tang Zhi-hong3 (1.State Key Laboratory of Oil , Gas Reservoir Geology , Exploitation,Southwest Petroleum University,Chengdu 610500,2.Institute of Exploration , Development,Southwest Oil-gas Branch,Sinopec,Chengdu 610000,3.936 Platform Drilling Department of Zhanjiang Branch,CNOOC,Zhanjiang 524000) |
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| Abstract: | Determination of the effective-stress coefficient is the key of experimental research on the relationship of permeability and effective-stress. The experiments include three circles,and the pore pressures are variable in each circle. We processed data with three methods,including maximum-likelihood approach,Bernabe's method and Brace's method. The results indicate the effective-stress coefficient when pore pressure rising is smaller than when pore pressure declining. The fitting result of maximum-likelihood... |
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| Keywords: | low-permeability rock effective stress permeability effective-stress coefficient maximum-likelihood approach |
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