Differential Enrichment Mechanism and Key Technology of Shale Gas in Complex Areas of South China
Xie Xinong
Hao Fang
Lu Yongchao
He Sheng
Shi Wanzhong
Jiang Zhenxue
Xiong Yongqiang
Zhang Jinchuan
Abstract：In view of the characteristics of strong temporal and spatial heterogeneity, high thermal maturity, complex tectonic evolution, differential enrichment and various preservation conditions of shale gas in southern China, multidisciplinary methods are applied to further study the Wufeng-Longmaxi marine shale gas, and a number of key technologies are developed to characterize the evaluation parameters of marine shale gas with over-high maturity in the complex geologic areas of southern China.The results show that argillaceous siliceous shales and argillaceous/siliceous mixed shales are the advantageous lithofacies in the Wufeng Formation-Longmaxi Formation.The meso-pore and macro-pore make a great contribution to the pore volume, and the micro-nano pore structure is controlled by mineral composition and porosity development.The enrichment and evolution of shale gas are characterized by high paleotemperature, high thermal evolution, complex evolution of temperature and pressure, complicated conditions for shale gas occurrence and preservation.The Wufeng-Longmaxi marine shale gas could be effectively evaluated in terms of technologies of lithofacies optimization, the characterization of pore space from macroscopic and microscopic perspectives, the complex evolution process of marine shale, and the evaluation parameters for sweet spots of shale gas.The research results can provide technical support for the basic geological survey of shale gas in southern China.
Keywords：shale gasWufeng FormationLongmaxi Formationenrichment mechanismkey technologyYangtze areapetroleum geology.
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 1045-1056 )