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通过对莺歌海-琼东南盆地地质、地球化学的综合分析结合盆地动态模拟技术,系统论证了高地温梯度、强超压环境活动热流体的运移和聚集对有机质热演化和油气生成的强化作用,发现并论证了异常孔隙流体压力对有机质热演化和油气生成的抑制作用及其表现形式、动力学机制,并进行了化学动力学模拟。在此基础上,总结出高地温梯度、异常压力环境有机质的热演化和油气生成模式。
Based on the comprehensive analysis of the geology and geochemistry of the Yinggehai-Qiongdongnan Basin and the dynamic simulation of the basin, the systematical study shows that the migration and accumulation of active hydrothermal fluids and the enhancement of hydrocarbon generation are highly evidenced by the high geothermal gradient and strong overpressure environment. The results show that the abnormal pore fluid pressure on the thermal evolution of organic matter and hydrocarbon generation inhibition, its manifestations, dynamics, and chemical kinetics simulation. On this basis, the thermal gradient and the hydrocarbon generation pattern of organic matter in abnormal pressure environment are summarized.