Characteristics of fault structure in Tanan Sag, Haita Basin in Dornod Aymag, Mongolia and its hydrocarbon significance
Chen Weichang1 Qi Jiafu1 Jiang Hongfu2 Liu Xue3 Sun Jiahua2 Xin Shiwei2
1 College of Geosciences,China University of Petroleum(Beijing),Beijing 102249 2 Hulunbuir Branch,Daqing Oilfield Company,PetroChina,Hailar 021000,Inner Mongolia 3 Changchun Oil Production Plant,Jilin Oilfield Company,PetroChina,Changchun 130618,Jilin
Abstract Based on structural geometry data compiled by interpretation of 3D seismic data in Tanan Sag of Haita Basin,the faults characteristics and evolution,and their controls on sedimentation and hydrocarbon source rocks,trap,and accumulation were analyzed in this paper.It is found that the Tanan Sag had gone through three big basin historical periods,that is,composite faulted stage(K1t-K1n),the composite fault-depression transition stage(K1d)and reverse depression stage(K1y-K2q),and normal fault system and strike-slip normal fault system formed during the Cretaceous.Affected by faults movement,the subsidence centers in sub-sag were differentiated and migrated distinctly in different stages.The subsidence center distributed along the hanging wall of the boundary faults during the composite faulted stage,and moved to the center of the sag during the composite fault-depression transition stage.The strength and style of the faults controlled the distribution of sedimentary facies and hydrocarbon accumulation conditions.
Corresponding Authors:
Qi Jiafu,born in 1957,is a professor of China University of Petroleum(Beijing),and is mainly engaged in researches of oil structure analysis and petroliferous basin analysis. Email: qijiafu@cup.edu.cn
About author: Chen Weichang,born in 1983,is a Ph.D.candidate of China University of Petroleum(Beijing),and is mainly engaged in research of oil structure analysis. E-mail: chenwc1983@163.com
Cite this article:
Chen Weichang,Qi Jiafu,Jiang Hongfu et al. Characteristics of fault structure in Tanan Sag, Haita Basin in Dornod Aymag, Mongolia and its hydrocarbon significance[J]. JOPC, 2013, 15(4): 539-550.
Chen Weichang,Qi Jiafu,Jiang Hongfu et al. Characteristics of fault structure in Tanan Sag, Haita Basin in Dornod Aymag, Mongolia and its hydrocarbon significance[J]. JOPC, 2013, 15(4): 539-550.
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