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应用生烃动力学与碳同位素动力学方法,结合天然气藏形成的地质背景,研究了塔里木盆地库车拗陷依南2气藏天然气生成与聚集.依南2气藏天然气主要来源于库车拗陷阳霞凹陷中心中下侏罗统含煤岩系烃源岩,基本上属长期累积聚集气,主要聚集时间为0～5 Ma,对应R_o为 1.25％～1.95％;天然气散失率为25％～30％.该研究,不仅弥补了传统的依据生、储、盖及圈闭的匹配关系来研究天然气藏形成模式的不足,而且对其他气藏的研究具有借鉴意义.
Based on the hydrocarbon generation kinetics and carbon isotope kinetics and the geological background of natural gas reservoirs, the natural gas generation and accumulation in the Yinan-2 gas reservoir in the Kuqa depression of Tarim Basin are studied.The natural gas from the Yinan-2 gas reservoir mainly comes from the Kuche bend The source rocks of the Middle-Lower Jurassic coal-bearing series in the center of the Yangyang Sag are basically long-term accumulated gas with the main accumulation time of 0-5 Ma and corresponding R_o of 1.25% -1.95%; the natural gas loss rate of 25% ~ 30% .This study not only makes up for the lack of the traditional pattern of formation of natural gas reservoirs based on the matching relationship of reservoir, reservoir, cap and trap, but also has reference significance for the study of other gas reservoirs.