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《Chinese Journal of Geophysics》 2013-08
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Study of rock conductive mechanism based on pore structure

LIU Tang-Yan1,3,TANG Tian-Zhi2,4,DU Huan-Hong2,ZHANG Hai-Ning2,WANG Hong-Tao1 1 State Key Lab of Marine Geology(Tongji University),Shanghai 200092,China 2 Technology Research Center,China Petroleum Logging CO.LTD.,Xi′an 710077,China 3 State Key Lab of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University),Chengdu 610500,China 4 Beihang University,Institute of Instrumental Science and Opto-electronics Engineering,Beijing 100191,China  
The classic Archie′s Laws give solutions in quantitative logging analysis.Unfortunately,only in the reservoir with simple pore structure the Archie′s Laws are suitable.For many complex reservoirs appearing in oil exploration,the classic Archie′s Laws fail to provide right oil saturation in logging analysis.Based on the Sphere-Cylinder Model,in this paper we study rock resistivity and obtain the numerical simulation result for different pore structures and oil saturations.By means of the numerical simulation and analysis,we conclude that pore structure is the principal factor to cause experimental data scatter.After comparing the rock resistivity of different pore structures but the same oil saturation,we confirm that the complex pore structure leads to the low resistivity in oil-bearing zone.
【Fund】： 国家863计划(2006AA06Z214);; 中国石油集团公司研究项目(2011B-4000);; 油气藏地质与工程国家重点实验室开放基金(PLN1101)的联合资助
【CateGory Index】： P618.13
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