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蟠龙油田延长组长2油层属典型的低渗—超低渗储层;富含有机质的烃源岩为油气的生成提供了物质保障;广泛发育的泛滥平原相、沼泽相泥岩为油气成藏提供了良好的盖层条件。研究认为长2油藏以构造—岩性复合油气藏为主,油气富集主要受物性、岩性及岩相等因素影响。有利的沉积相带、储层物性及鼻状隆起构造共同控制了长2油藏的油气分布。
The Chang 2 reservoir of Panlong Oilfield Yanchang Formation belongs to typical low permeability and ultra-low permeability reservoirs. The source rocks rich in organic matter provide the material guarantee for the formation of oil and gas. The extensive plains and marsh facies are the reservoirs for hydrocarbon accumulation Provides good capping conditions. The study suggests that the Chang 2 reservoir is dominated by tectonic-lithologic composite reservoirs, and the hydrocarbon enrichment is mainly affected by physical properties, lithology and rock facies. The favorable sedimentary facies belt, reservoir properties and nascent uplift structure jointly control the oil and gas distribution in Chang 2 reservoir.