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distribution characteristics, exploration and development, geological theories research progress and exploration directions of shale gas in China

引用

China Geology 2022年第1期5卷 110-135页

作者： Shi-zhen Li Zhi Zhou Hai-kuan Nie Lei-fu Zhang Teng Song Wei-bin Liu Hao-han Li Qiu-chen Xu Si-yu Wei Shu Tao Oil and gas Survey China Geological SurveyMinistry of Natural ResourcesBeijing 100083China The Key Laboratory of Unconventional Oil and gas Geology China Geological SurveyBeijing 100083China Sinopec Petroleum Exploration and Production Research Institute Beijing 100083China PetroChina Research Institute of Petroleum Exploration and Development Beijing 100083China School of Energy Resources China University of Geosciences(Beijing)Beijing 100083China

The shale gas resources in China have great potential and the geological resources of shale gas is over 100×10^(12)m^(3),which includes about 20×10^(12)m^(3) of recoverable ***-rich shales can be divided into three types according to their sedimentary environments,namely marine,marine-continental transitional,and continental shales,which are distributed in 13 stratigraphic systems from the Mesoproterozoic to the *** Sichuan Basin and its surrounding areas have the highest geological resources of shale gas,and the commercial development of shale gas has been achieved in the Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in these areas,with a shale gas production of up to 20×10^(9)m^(3) in *** has seen rapid shale gas exploration and development over the last five years,successively achieving breakthroughs and important findings in many areas and *** details are as follows.(1)Large-scale development of middle-shallow shale gas(burial depth:less than 3500 m)has been realized,with the productivity having rapidly increased;(2)breakthroughs have been constantly made in the development of deep shale gas(burial depth:3500-4500 m),and the ultradeep shale gas(burial depth:greater than 4500 m)is under testing;(3)breakthroughs have been made in the development of normal-pressure shale gas,and the assessment of the shale gas in complex tectonic areas is being accelerated;(4)shale gas has been frequently discovered in new areas and new strata,exhibiting a great *** on the exploration and development practice,three aspects of consensus have been gradually reached on the research progress in the geological theories of shale gas achieved in China.(1)in terms of deep-water fine-grained sediments,organic-rich shales are the base for the formation of shale gas;(2)in terms of high-quality reservoirs,the development of micro-nano organic matter-hosted pores serves as the core of shale gas accumulation;(3)in terms of pre

关键词： shale gas shale gas distribution Formation era Deep-water fine-grained sediments shale reservoirs Preservation conditions Exploration and development Wufeng-Longmaxi formations Exploration directions Oil-gas exploration engineering China

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