Numerical simulation of the dual laterolog for carbonate cave reservoirs and response characteristics
Tan Mao-Jin1,2, Gao Jie3, Wang Xiao-Chang4, and Zhang Song-Yang4
1. Key Laboratory of Geo-detection (China University of Geosciences), Ministry of Education, Beijing 100083, China.
2. School of Geophysics and Information Technology, China University of Geosciences (Beijing), Beijing 100083, China.
3. College of Geophysics and Information Engineering, China University of Petroleum (Beijing), Beijing 102249, China.
4. SINOPEC Research Institute of Exploration and Production, Beijing 100083, China.
Abstract：
Cave carbonate formations are characterized by heterogeneity, which makes electrical log prediction difficult. It is currently important to know how to use the dual laterolog to accurately identify and quantitatively evaluate caves. Using numerical simulation to calculate electrical log responses can provide a theoretical basis for cave identification and evaluation. In this paper, based on the dual laterolog principles, we first study different size spherical cave models using the finite element method (FEM), determine a relation between resistivity and cave filling after comprehensively studying the log responses of cave models with different filling material, and finally study the dual laterolog responses on caves filled with shale, limestone, conglomerate, and thin laminated formation of sand and shale. The numerical results provide a theoretical basis for identification and evaluation of carbonate cave reservoirs.
TAN Mao-Jin,GAO Jie,WANG Xiao-Chang et al. Numerical simulation of the dual laterolog for carbonate cave reservoirs and response characteristics[J]. APPLIED GEOPHYSICS, 2011, 8(1): 79-85.
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2011, Vol. 8 
