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富有机质泥页岩复杂的沉积成岩过程、细粒特征,以及远小于常规储层的以微米—纳米级为主的孔隙空间,给海相页岩气储层特征研究带来了极大的挑战。近年来借助多项先进技术方法的推广运用,在海相页岩气储层的多个方面形成了重要认识,页岩有机质与其成熟度关系密切,岩石矿物组分判定方法向定量化发展,岩相预测与建模技术得以应用,但成岩作用对储层的影响尚有待进一步探知,物性变化趋势的认识尚存在不同见解,孔隙结构实现了从定性到定量表征的跨越,页岩力学性质的解析能够有效指导压裂改造。通过进一步分析海相页岩气储层研究的发展动态,就页岩气储层孔隙结构系统表征、区域尺度上成岩与岩相变化的时空配置关系、成岩演化—岩相—孔隙系统—有机质丰度潜在的多元关系等研究方向作出了展望,以期推进储层特征研究在深度和广度上向前发展。
The complicated sedimentary diagenesis, fine-grained characteristics and the micrometer-nanometer-dominated pore space of organic-rich shale complicate the study of marine shale gas reservoirs . In recent years, with the promotion and application of a number of advanced technologies and methods, important understanding has been formed in many aspects of marine shale gas reservoirs. The organic matter in shale is closely related to its maturity, and the methods for judging rock mineral components are quantitatively developed. However, the influence of diagenesis on reservoirs has yet to be further explored. There are still different understandings on the understanding of the trend of physical properties, and the pore structure has realized the spanning from qualitative to quantitative characterization and the analysis of mechanical properties of shale Can effectively guide fracturing transformation. Through the further analysis of the development of marine shale gas reservoirs, the relationship between the spatial and temporal distribution of diagenesis and lithofacies in the shale gas reservoir is characterized by systematic characterization of the pore structure, diagenetic evolution-lithofacies-pore system-organic matter abundance Degree of potential multiple relations and other research directions to make a prospect, with a view to promoting the study of reservoir characteristics in the depth and breadth of the forward development.