中国南方寒武系海相页岩含气性在不同地区差异较大，有机质孔隙发育机制不清楚，无法直接用控制五峰组—龙马溪组页岩含气性的有机质丰度和后期构造活动对页岩气保存来预测。本研究提出采用历史演化的观点，在动态的条件下研究孔隙形成和发育机制，恢复南方寒武系页岩有机质转化、油气形成和有机孔演化的历史。通过高精度精细地质地球化学自然剖面研究，建立寒武系海相页岩有机质富集模式，分析高演化条件下孔隙发育机制，评价寒武系页岩气的主控因素。通过页岩中裂缝或裂纹充填的碳酸盐/硅质胶结物流体包裹体研究，恢复寒武系页岩油气形成、排烃、滞留和保存历史。通过岩石小柱体高温高压金管热解模拟实验，并结合SEM孔隙成像分析、氮气等温吸附以及甲烷等温吸附实验，建立有机孔形成、演化的动力学预测模型。在综合研究的基础上，结合自然剖面和实验室模拟结果，量化各种控制因素，建立寒武系页岩有机质演化、页岩气形成和孔隙演化耦合机制的概念模型。

The shale gas content of Cambrian Shale, southern China can neither be predicted by thermal maturity model that is workable to US shale plays, nor by the Wufeng–Longmaxi Formation shale model that TOC content and post-tectonic preservation are key factors to shale gas sweet-spot prediction. The mechanism of organic matter hosted pore evolution in Cambrian marine shale is unique and remains unclear, likely leading to significantly regional variation in shale gas content of the Cambrian marine shale. In a view of geological history evolution, the proposed study on pore formation and evolution in the Cambrian shale is coupling with the histories of organic matter conversion, oil and gas formation and organic-matter hosted pores evolution. High-resolution geological and geochemical core wells or outcrop sections will be studied to reconstruct organic matter accumulation model of the Cambrian shale; to investigate the mechanism of inorganic and organic pores formation in the highly-matured shale; and to evaluate the controlling factors to the Cambrian shale gas sweet spot. Fluid inclusions of calcite cements and quartz cements filled in the natural factures of Cambrian shale will be analyzed to restore the history of oil and gas generation, expulsion, retention and preservation in the Cambrian marine shale in southern China. Gold-tube pyrolysis of miniature core plugs under high temperature and high pressure conditions, combined with detailed oil and gas geochemical characterization, SEM pore imaging analysis, N2 isothermal adsorption, and CH4 isothermal adsorption experiments, will be conducted for the development of kinetics model of organic-matter hosted pore formation and evolution. On the basis of integrated studies on the field observation and laboratory’s results (including fluid inclusion and gold-tube pyrolysis), the conceptual model of coupling mechanism among organic matter evolution, shale gas formation, and pore evolution in Lower Paleozoic Cambrian marine shale in south China will be established and serve for the Cambrian Shale gas content prediction.