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Advances in Earth Science  2007, Vol. 22 Issue (9): 879-887    DOI: 10.11867/j.issn.1001-8166.2007.09.0879
Articles     
Advancements and Problems on Hydrocarbon Accumulation Research of Complicated Superimposed Basins in Western China
PANG Xiong-qi1, LUO Xiao-rong2, JIANG Zhen-xue1, LIN Chang-song3, ZHANG Shui-chang4, ZHONG Ning-ning1, LI Zhong2
1. China University of Petroleum, Beijing 102249,China;2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029,China;3. China University of Geosciences,Beijing 100083,China;4. CNPC Research Institute of Petroleum Exploration and Production, Beijing 100083,China
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Abstract  

About 45% of China's remaining hydrocarbon resources are contained in the complicated superimposed basins in western China. However, the proven ratio is less than 20% and the potential is great. The researches of basic theories over the past two decades indicate that these superimposed basins are characterized by four geological features: “multi-phase structural revolution, multi-sets of source-reservoir-seal assemblages, multi-cycles of hydrocarbon accumulation and multi-phase adjustment and reconstruction”. The formation and distribution of giant fields are controlled by four key elements including “the migration of paleo-highs, the evolution of source kitchens, the development of regional seals and the superimposition of structural equilibrium belts. Based on the research results, the accumulation model of ”multi factors recombination and process superimposition" and the methodology for predicting favorable exploration fairways are proposed to guide the hydrocarbon exploration in the Tarim basin. Besides the four key elements mentioned above, the formation and distribution of complicated hydrocarbon accumulations are also controlled by “development and distribution of traps, development and distribution of reservoir rocks, formation and evolution of preferential migration pathways, dynamic conditions for migration and accumulation” and their inter-coupling relationships. Based on the previous achievements, further basic researches on “formation and evolution mechanism and distribution patterns of complicated hydrocarbon accumulations” has a great practical significance to improve the efficiency of exploration drilling and develop exploration theories on petroleum explorations in superimposed basins.

Key words:  Complicated superimposed basin      Hydrocarbon prediction.      Formation of hydrocarbon accumulations      Petroleum exploration     
Received:  20 July 2007      Published:  10 September 2007
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PANG Xiong-qi, LUO Xiao-rong, JIANG Zhen-xue, LIN Chang-song, et al. Advancements and Problems on Hydrocarbon Accumulation Research of Complicated Superimposed Basins in Western China. Advances in Earth Science, 2007, 22(9): 879-887.

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http://www.adearth.ac.cn/EN/10.11867/j.issn.1001-8166.2007.09.0879     OR     http://www.adearth.ac.cn/EN/Y2007/V22/I9/879

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