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《Journal of Northeast Petroleum University》 2014-04
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Accumulation conditions for the continuous tight-sandstone gas in Jurassic,Kuqa depression

YUAN Wenfang;WANG Pengwei;QIN Hong;PANG Xiongqi;ZHANG Bo;DU Zhong-ming;XING Xing;PetroChina Tarim Oilfield Company;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum (Beijing);College of Geosciences,China University of Petroleum (Beijing);  
As favorable conditions were an important basis for the continuous tight-sandstone gas accumulating in large scale,it is of great significance in both theory and practice to probe into these conditions.This paper discussed source rocks,tight gas reservoirs,cap rocks and structure factors that were needed for the continuous tight-sand gas reservoir in Jurassic Ahe formation,Kuqa depression.The results showed that source rocks in the Triassic supplied enough gas for the accumulation of the tightsandstone gas,tight sand reservoirs controlled the distribution of tight-sandstone gas both from the space and time,overlying coal and underlying shale protected the gas accumulation.Apart from these,dramatically structure activity in the later stage promoted the stratus being buried in a fast speed,which was beneficial for thermal evolution of source rocks and offering abundance gas.On the other hands,the structure activity played a significant role in adjusting the continuous tight-sandstone gas reservoirs,because fractures formed by structure activity could improve the physical property and formed the channel for gas losing.
【Fund】: 国家重点基础研究发展计划(973计划)项目(2011CB201105)
【CateGory Index】: P618.13
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