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含煤建造在气藏形成中的作用

         

摘要

从岩石圈地球动力学特点出发,研究了岩石圈俯冲带含煤建造的生成及其经后期改造生成天然气的机理。例举了北美阿帕拉契亚山前边缘坳陷、落基山逆掩断裂带,西欧诸含煤盆地,东南亚(印尼、缅甸、泰国等)山前坳陷带含煤建造与天然气成藏的关系。详细分析了俄罗斯地台维柳伊一上扬斯克山前坳陷内含煤建造与烃类生成、运移、聚集的关系,并对该区烃类分布进行了预测。指出,丰富的有机质,较短期内快速增高的温压条件,区域地震的活动性是造成岩石圈板块俯冲带内油气生成的主要因素。%In view of features of lithosphere geodynamics, the origin of coal-bearing formation in the lithosphere subduction zone and the mechanism of its coal-derived gas after later reformation are studied. The relations between the coal-bearing formations and the gas accumu- lations in North America Appalachia piedmont edge depression, the Rocky mountain overthrust fault zone, Western Europe coal-bearing ba- sins, Southeast Asia (Indonesia, Burma, Thailand, etc.) piedmont depression belts are listed. The relationship between the coal-bearing for- mations and the hydrocarbon generation, migration and accumulation in Viliusk-Virhuoyangski piedmont depression of Russian platform is analyzed in detail, including the predictions of hydrocarbons distribution in this area. It is pointed out that the abundant organic matter, rap- idly increasing temperature and pressure conditions and regional seismic activity are the major factors of the hydrocarbons generation in the lithosphere plate subduction zones.

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