2018 Vol. 1, No. 2
Article Contents

Gang-yi Zhai, Yu-fang Wang, Zhi Zhou, Shu-fang Yu, Xiang-lin Chen, Yun-xiao Zhang, 2018. Exploration and research progress of shale gas in China, China Geology, 1, 257-272. doi: 10.31035/cg2018024
Citation: Gang-yi Zhai, Yu-fang Wang, Zhi Zhou, Shu-fang Yu, Xiang-lin Chen, Yun-xiao Zhang, 2018. Exploration and research progress of shale gas in China, China Geology, 1, 257-272. doi: 10.31035/cg2018024

Exploration and research progress of shale gas in China

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  • There are three types of shale gas resources in China. The resources are present in large amounts and are widely distributed. Marine facies, transitional facies and continental facies resources each account for a third. Based on resource distributions, there are many wells penetrated into the Sinian, Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian strata of the Yangtze plate and its periphery, the North China Craton and the Tarim Basin. Many years of exploration have indicated that the marine Silurian Longmaxi shale gas is widely distributed in south China and has been industrialized in its production in the Sichuan basin. The shale gas from the Cambrian Niutitang Formation and the Sinian Doushantuo Formation are important discoveries in Yichang, Hubei and Zhenba, Shanxi. There are also shale gas resources found within transitional facies and continental facies in different areas in China. The "two element enrichment theory" has been summarized during the exploration process of Silurian marine shale gas in the Sichuan Basin. In addition, horizontal drilling and fracturing technologies up to 3500 m in depth have been developed. Based on the understanding of shale gas accumulation in a complex tectonic zone outside the Sichuan basin, a preliminary summary of the formation of the "converse fault syncline control reservoir" and "paleo uplift control reservoir" model has been constructed. The dominant theory of "Trinity" shale gas enrichment and the high yield of the "deep water Lu Pengxiang sedimentary facies belt, structural preservation conditions and overpressure" is summarized. Guided by the above theories. Anye1 well in Guizhou and Eyangye1 well in Hubei were drilled. "Four storey" oil and shale gas is found in the Permian Qixia group, the Silurian Shiniulan Formation, the Longmaxi Formation and the Ordovician Baota Formation in Anye1 well. Good shale gas has been gound in the Cambrian Niutitang formation inian Doushantuo formation in Eyangye 1well. This paper aims to summarize and review the main progress, theoretical technology and problems of shale gas exploration and development in recent years in China, and predicts the future exploration and development direction for shale gas and possible exploration areas.

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