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我国沉积盆地内发育石炭—二叠系、侏罗—白垩系和古近—新近系3套火山岩,火山岩与有效烃源岩近源组合匹配最有利,远源组合需断层或不整合面沟通,生烃中心控制油气分布;以火山熔岩、火山角砾岩和风化壳岩溶型储层为主;中国东部断陷盆地火山岩油气藏以近源组合为主,沿断陷高部位爆发相火山岩储层发育,斜坡部位喷溢相火山岩大面积分布,主要形成岩性、构造—岩性油气藏;中西部发育两种成藏组合,沿不整合面分布的风化淋滤型大型地层油气藏最有利。
Three sets of volcanic rocks of Carboniferous-Permian, Jurassic-Cretaceous and Paleogene-Neogene are developed in the sedimentary basin of China. The matching of volcanic rocks and effective hydrocarbon source rock is most favorable for the near-source assemblage. The remote source assemblage needs to communicate faults or unconformities, The hydrocarbon generation centers controlled the distribution of oil and gas; volcanic lavas, volcanic breccias and weathered crust karst reservoirs dominated the volcanic reservoirs in the faulted basins in the eastern part of China with near-source assemblage. , And the volcanic rocks in the slope area are mainly distributed in lithosphere and tectonic-lithologic reservoirs. Two kinds of reservoir assemblages are developed in the central and western parts of the basin, and the weathered leaching large-scale formation reservoirs along the unconformity are most favorable.