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.
This work was supported by State Key Laboratory of Petroleum Resources and Prospecting (Grant No. 2009009), Basic Scientific Research Special Fund of Central Colleges (Grant No. 2010ZY28), and National Major Projects (Grant No.2008ZX05023-005 and 2008ZX05035-002).
About author: Tan Mao-Jin is an Associate Professor at the China University of Geosciences(Beijing). He was awarded his PhD from China University of Petroleum (East China) in 2006 and was a postdoctoral fellow in Geophysics at the Graduate University of the Chinese Academy of Sciences from 2006 to 2008.His research interests focus on geophysical well logging. He is also interested in research about new logging technologies and complex reservoir log interpretation and evaluation.
Cite this article:
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 
