Development model of Hercynian cave system in karst canyon area of Tahe Oilfield, Tarim Basin
Li Yuan1, 2, Lu Xinbian3, Cai Zhongxian2, Zhang Heng2, Liu Xianfeng4
1 Soil Fertilizer and Agricultural Water Saving Research Institute 。of Xinjiang Academy of Agricultural Sciences, Urümqi 830091,Xinjiang; 2 Faculty of Earth Resources,China University of Geosciences(Wuhan),Wuhan 430074,Hubei; 3 Research Institute of Petroleum Exploration & Production, Northwest Company, SINOPEC, Urümqi 830011,Xinjiang; 4 School of Geoscience, Yangtze University, Wuhan 430100,Hubei;
Abstract Giant karst cave reservoir develop in the karst canyon area of Tahe Oilfield,with good explotation result. Through high resolution 3D seismic data,data of drilling and the seismic attributes extracting the karst cave system,palaeo-gemorphology and palaeo-drainage system were rebuilt. The karst development mechanism was discussed and the model of the karst cave were summarized as following: (1)Surface water has strong vertical erosion in upper reaches of the canyon,the canyon lost the drainage function and evolution into dry valley,hydrodynamic conditions in lower reaches of canyon is weaken. (2)Cave types divided into underground water caves,canyon-fault caves,underground water caves development in the upstream of canyon, underground caves and canyon are mapping relationship,canyon-fault caves development on both sides of the canyon,with multilayer characteristics in vertical. (3)With a comprehensive analysis of the karst cave genesis mechanism in the canyon area,we thought that the underground water cave development in an adequate water supply condition and strong vertical erosion of water,canyon-fault caves development in a multiple-stage drop of base level and fault systems. Combined with the characteristics of modern Enshi cave systems. evolutionary model of the karst cave in canyon are proposed,which provides a theoretical reference for further cave reservoir prediction and exploration practice.
Fund:Financially supported by the National Basic Research Program(973 Program) of China(No.2012CB214804)
About author: About the first author Li Yuan,born in 1987,graduated from China University of Geosciences(Wuhan)in 2016 with his Ph.D. degree. Now he is mainly engaged in resource management at Xinjiang Academy of Agricultural Sciences. E-mail: liyuan586287@126.com.About the corresponding author Cai Zhongxian,born in 1963,is a professor in China University of Geosciences(Wuhan).He is mainly engaged in carbonate reservoir geology. E-mail: zxcai@cug.edu.cn.
Cite this article:
Li Yuan,Lu Xinbian,Cai Zhongxian et al. Development model of Hercynian cave system in karst canyon area of Tahe Oilfield, Tarim Basin[J]. JOPC, 2017, 19(2): 364-372.
Li Yuan,Lu Xinbian,Cai Zhongxian et al. Development model of Hercynian cave system in karst canyon area of Tahe Oilfield, Tarim Basin[J]. JOPC, 2017, 19(2): 364-372.
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