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利用岩心观察、镜下鉴定等对不整合结构进行了系统分析,定量评价了不整合的油气输导能力。结果表明,不整合面下风化岩石中裂缝、溶孔发育,是不整合输导油气的主要通道。不整合油气输导能力主要受不整合结构层的渗透性、厚度、连通性以及遮挡层发育程度、油气运移动力、油气的密度和粘度等因素控制。综合各项影响因素建立了不整合油气输导能力定量评价公式,利用此公式对济阳坳陷太平油田古近系—新近系与前古近系之间的不整合油气输导能力进行评价。计算结果表明,太平油田古近系—新近系与前古近系之间不整合油气输导能力比较好,是油气运移的主要通道,计算结果与实际情况吻合程度较高。
The unconformity structure was systematically analyzed by core observation, microscopic identification and so on. The unconformity of oil and gas conductivity was quantitatively evaluated. The results show that the fractures and dissolved pores in the weathered rock under the unconformity are the main channels that do not integrate the hydrocarbon migration. The unconformity of oil and gas transport capacity is mainly controlled by the permeability, thickness, connectivity of the unconformity structure, the development of the occlusion layer, the motive force of hydrocarbon migration, the density and viscosity of oil and gas, and other factors. Based on the various influencing factors, a quantitative evaluation formula of unconformity for oil and gas transport capability was established, and the unconformity of hydrocarbon migration capability between Paleogene-Neogene and Paleogene in Taiping Oilfield, Jiyang Depression was evaluated. The calculated results show that the unconformity between the Paleogene-Neogene and the Paleogene in the Taiping Oilfield is relatively good, which is the main channel for hydrocarbon migration. The calculation results are in good agreement with the actual situation.