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《Journal of Xi'an Shiyou University(Natural Science Edition)》 2013-05
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Main controlling factors and hydrocarbon accumulation mode of Carboniferous gas reservoirs in east Sichuan Basin

DONG Cai-yuan;WEI Guo-qi;YANG Wei;LIU Man-cang;MA Shi-yu;HAO Cui-guo;Research Institute of Petroleum Exploration and Development,CNPC;Langfang Branch,Research Institute of Petroleum Exploration and Development,CNPC;  
Carboniferous is one of the most important reservoirs and producing formations,Carboniferous exploration is always the key and hot point in East Sichuan Basin even the whole Sichuan Basin. Based on research of the evolution of Kaijiang paleo-uplift,the characteristics and development controlling factors of reservoir and the preservation condition of gas pools,the controlling factors and accumulation mode of the Carboniferous gas reservoirs in east Sichuan Basin are studied,and it is held that the controlling factors of the Carboniferous gas reservoirs are: the evolution of Kaijiang paleo-uplift( which determines the accumulation of the gas reservoirs),highquality reservoir( which is the basis of forming the gas reservoirs) and cap rock condition( which is the key to forming the gas reservoirs). The accumulation of the gas reservoirs is divided into two stages. The first stage is the forming period of the paleo uplift and the paleo-gas reservoirs: Yunnan movement makes Carboniferous reservoir more developed,Kaijiang paleo-uplift is developed and basically formed in Indo movement,the Carboniferous is between two high-pressure mudstone layers,and a lot of hydrocarbon generated by the underlying Silurian source rocks forms a large scale formation-structural paleo gas reservoirs. In the second stage,the paleo gas reservoirs redistribute in traps due to Yanshanian movement and Himalayan movement.
【Fund】: 国家科技重大专项(编号:2008ZX05007-02)
【CateGory Index】: P618.13
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