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通过对长岭断陷东岭斜坡带烃源岩埋藏史、地温史、有机质成熟度史、生烃率演化、累积生烃量演化等特征的研究,认为该区火一段烃源岩分别在火石岭组沉积末期和盆地坳陷期发生过2次大规模生排烃作用:第1期生排烃在火石岭组内部形成大量自生自储型岩性、地层油藏;第2期生排烃在火石岭组及上覆各套断陷期地层中形成大量构造、构造—岩性油藏和气藏。这2个排烃期对应的油气成藏过程可归纳为断陷期隐蔽油藏成藏模式和坳陷期构造油气藏成藏模式,根据该成藏模式指出长岭断陷中西部的残留洼陷是下一步勘探的有利方向。
Based on the study of burial history, geotemperature history, history of organic matter maturity, evolution of hydrocarbon generation rate and accumulation of hydrocarbon accumulation in the Dongling slope belt in Changling fault zone, During the late depositional period and basin depression, two large-scale hydrocarbon generation and expulsion processes have occurred: the first generation and expulsion hydrocarbon formed a large amount of self-storage and lithologic reservoir in the Huoshiling Formation; the second generation and expulsion of hydrocarbon from the flint Ling Formation and overlying the various sets of faulted strata formed a large number of structures, structures - lithologic reservoirs and gas reservoirs. The process of hydrocarbon accumulation corresponding to these two periods of hydrocarbon expulsion can be summarized as the subtle reservoir accumulation mode during the faulted-down period and the reservoir-forming mode of the depression-period structural reservoirs. According to this reservoir mode, the residual depression in the central-western Changling fault depression Subsidence is a favorable prospect for further exploration.