南方复杂地区页岩气差异富集机理及其关键技术

发布时间：2018-03-19 18:33

本文选题：五峰组　切入点：龙马溪组　出处：《地球科学》2017年07期 　论文类型：期刊论文

【摘要】：针对我国南方海相富有机质页岩时空非均质强、热演化程度高、构造演化历史复杂、页岩气具差异富集和保存条件多样等特点,采用多学科方法对南方五峰组-龙马溪组海相页岩气区进行精细解剖,形成了针对南方复杂地区海相高过成熟页岩气评价参数表征的多项关键技术.研究结果显示富泥硅质页岩和富泥/硅混合质页岩是五峰组-龙马溪组的优质岩相;页岩中孔和宏孔提供了主要的孔体积,微-纳米孔隙结构特征受页岩组分及其孔隙发育程度双重控制;页岩气富集演化具"二高、三复杂"特点(古温度高,热演化程度高,温压演化复杂,页岩气赋存方式复杂及保存条件复杂).研究中所提出的页岩岩相表征和优选技术、多尺度储集空间全息表征技术、海相页岩复杂演化改造过程表征技术、初步形成的甜点评价参数体系表征方法可有效地应用于南方五峰组-龙马溪组海相页岩气评价.研究成果可为南方页岩气基础地质调查工程提供技术支撑.
[Abstract]:In view of the characteristics of marine organic rich shale in southern China, such as strong spatiotemporal heterogeneity, high thermal evolution, complicated history of tectonic evolution, diverse enrichment and preservation conditions of shale gas, etc. The marine shale gas area of Wufeng formation and Longmaxi formation in South China was dissected by multi-disciplinary method. Several key techniques have been developed to characterize the evaluation parameters of marine high over mature shale gas in the complex area of southern China. The results show that the mud-rich siliceous shale and the mud-rich / siliceous mixed shale are the high quality lithofacies of Wufeng formation and Longmaxi formation. Pores and macropores in shale provide the main pore volume, the micro- nano pore structure is controlled by shale components and their pore development degree, and the evolution of shale gas enrichment and evolution is characterized by "two high, three complex" characteristics (high paleo temperature, high thermal evolution degree). The evolution of temperature and pressure is complicated, the storage mode of shale gas is complex, and the preservation conditions are complex. The techniques of shale facies characterization and optimization, multi-scale reservoir space holographic characterization, and the characterization of marine shale complex evolution and transformation process are proposed in this paper. The preliminary characterization method of desserts evaluation parameter system can be effectively applied to marine shale gas evaluation of Wufeng formation and Longmaxi formation in South China. The research results can provide technical support for the basic geological investigation of shale gas in southern China.
【作者单位】：中国地质大学构造与油气资源教育部重点实验室;中国石油大学;中国石油大学非常规天然气研究院;中国科学院广州地球化学研究所有机地球化学国家重点实验室;中国地质大学能源学院;
【基金】：中国地质调查局油气基础性公益性地质调查项目(No.DD20160185) 国家自然科学基金重大项目(Nos.41690131,41690134) 国家重大油气专项(No.2016ZX05034-002-003) 高等学校创新引智计划(No.B14031)
【分类号】：P618.13

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