河北省煤系天然气资源及其成藏作用
发布时间：2019-01-02 12:50
【摘要】：为摸清河北省煤系天然气资源潜力,揭示其耦合成藏作用,采用等温吸附、TOC含量测试、X衍射、岩石热解、高压压汞、液氮吸附、显微组分镜鉴、脉冲渗透率等试验测试,对源-储地化和物性特征进行研究,结合各赋煤构造区煤系沉积-构造演化史,进行煤系天然气资源评价并揭示其成藏作用。结果显示:河北省煤系天然气资源丰富,煤层气资源量39 015×108m3,页岩气资源量33 447×108m3,致密砂岩气资源量24 000×108m3,石炭二叠系占绝对优势;烃源岩有机质以Ⅲ型为主,成熟度Ro介于0.5%~3.0%,以成熟—过成熟阶段为主;煤对煤系天然气藏起决定作用,富有机质泥页岩起关键作用,泥页岩的厚度优势弥补了有机质"欠缺";煤系储层连通性较好,属低孔低渗型,二次生烃作用是煤系天然气成藏的关键;共生调节机制煤层气表现为层间调节,页岩气为层内调节,砂岩气为协调调节;基于共生调节机制和空间叠置关系,将煤系天然气藏分为"远源"致密砂岩气藏、"自源"页岩气/煤层气藏和"自源+他源"叠合气藏3类,后者包括3种成藏模式。
[Abstract]:In order to find out the potential of natural gas resources in coal series of Hebei Province and reveal its coupling accumulation, isothermal adsorption, TOC content test, X-ray diffraction, rock pyrolysis, high pressure mercury pressure, liquid nitrogen adsorption, microscopic examination, pulse permeability and so on were used. The characteristics of source-reservoir and physical properties are studied. Combined with the history of sedimentation-structural evolution of coal measures in various coal-bearing structural areas, the natural gas resources of coal measures are evaluated and their reservoir formation is revealed. The results show that there are abundant natural gas resources in coal measures in Hebei Province, with the CBM resources being 39 015 脳 10 8 m 3, shale gas resources 33 447 脳 10 8 m 3, tight sandstone gas resources 24 000 脳 10 8 m 3, Carboniferous Permian dominating. The organic matter of the source rocks is mainly type 鈪，
本文编号：2398509
[Abstract]:In order to find out the potential of natural gas resources in coal series of Hebei Province and reveal its coupling accumulation, isothermal adsorption, TOC content test, X-ray diffraction, rock pyrolysis, high pressure mercury pressure, liquid nitrogen adsorption, microscopic examination, pulse permeability and so on were used. The characteristics of source-reservoir and physical properties are studied. Combined with the history of sedimentation-structural evolution of coal measures in various coal-bearing structural areas, the natural gas resources of coal measures are evaluated and their reservoir formation is revealed. The results show that there are abundant natural gas resources in coal measures in Hebei Province, with the CBM resources being 39 015 脳 10 8 m 3, shale gas resources 33 447 脳 10 8 m 3, tight sandstone gas resources 24 000 脳 10 8 m 3, Carboniferous Permian dominating. The organic matter of the source rocks is mainly type 鈪，
本文编号：2398509
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