淄博—肥城地区石炭—二叠系煤相及生烃潜力

Coal fades and hydrocarbon generation potential of Permo-Carboniferous in Zibo and Feicheng areas

研究了淄博—肥城地区的宏观煤岩特征和显微组分特征,结合指示成煤微环境的指数,对研究区的煤相进行了划分;同时根据煤的热模拟实验结果,评价了该区煤的生烃潜力。结果表明:淄博地区石炭—二叠系发育湿地森林沼泽相、覆水森林沼泽相、较深覆水森林沼泽相和芦木芦苇沼泽相共4种煤相,肥城地区发育湿地森林沼泽相、覆水森林沼泽相和芦木芦苇沼泽相3种煤相;生烃潜力评价结果显示,肥城煤田煤的生烃潜力较好,而淄博地区的煤对生烃相对不利;煤相较好地控制了生烃潜力,覆水较深且流动性较好的芦木芦苇沼泽相生烃潜力最好。

The macroscopic petrography and maceral feature of coal were researched.Combined with the index of coal-forming microenvi-ronments,coal facies in the studied area have been classified.The hydrocarbon generation potential was evaluated according to the pyrolytic results of the coal.Four types of coal facies were classified in Zibo area namely wetland forest-swamp facies,water covered forest-swamp facies,deeper water covered forest-swamp facies and calamite reed bog facies.Three types of coal facies were classified in Feicheng area namely wetland forest-swamp facies,water covered forest-swamp facies,and calamite reed bog facies.The hydrocarbon generation potential in Zibo area is weaker than that in Feicheng area.The types of coal facies have well controlled the hydrocarbon generation potential.The best conditions for hydrocarbon generation are the calamite reed bog facies with deeper water and better flowability.