华庆地区三叠系延长组长6、8油藏成藏主控因素分析

本文在对鄂尔多斯盆地华庆地区三叠系延长组长6、长8油藏成藏特征分析的基础上,从油源、沉积、储层及圈闭等方面对其成藏主控因素进行了分析,认为华庆地区长6、8油藏类型主要为岩性圈闭油藏,其成藏主要受油源、沉积及储层等因素控制;油藏主要位于主砂带上,主砂体带侧向泥岩相变形成的致密遮挡带或砂体物性变差均能形成良好的封盖和遮挡条件,构成有利聚油圈闭。根据这一规律,指出了华庆地区长6、8油藏建产有利区。

Analysis To The Main Factors To Control Oil Reservoir Formation Of Chang6,Chang8 Reservior In Huaqing Area,Ordos Basin

Based on the characteristics of oil reservoir found in Chang6,Chang8 Reservior of triassic Yanchang Formatio in Huaqing area,Ordos basin,distribution of source rocks,sedimentation evolution and reservoir rocks as well as structure and trap were analyzed.The results indicate that Chang6,Chang8 oil reservoir belongs to lithologic encirclement deposit,which is mainly controlled by multiple factors such as source rock,sedimentary and reservoir rock.Oil reservoir localized in the main sand bodies,it formed favorable oil accumulation traps because of the good capping and occlusion conditions,which are formed by lateral mudstone and sand body physical properties variation.Acoording to this law,Some potential exploration targets in Chang6,Chang8 Reservior of Huaqing area are proposed.