胜利海上埕岛油田下古生界潜山高产因素分析

埕岛油田是我国浅海－极海海域发现的第一个大型整流油气田，四周环凹，油源条件十分优越，全区可划分为西排山，中排山，东排山三个潜山带构造单元，油气运移通道主要是断裂和风化壳不整合面，区域盖层发育良好，储集条件是油气富集高产控制因素，纵向上潜山带储层主要集中在潜山的风化壳；平面上主要沿断层分布，沿断层发育的奥陶系在潜山是本区古生办潜山勘探的最有利目标。

Reason Analysis of High Hydrocarbon Production from Paleozoic Buried Hill Reservoirs in Offshore Chendao Oil Field,Shengli Oil Province

Chendao Field,which sits on offshore Bohai Gulf,is the first large integrated oil field discovered in shallow-shallower seas in China.It may be divided into three structural units including Xipai Shan,Zhongpai Shan and Dongpai Shan buried-hill zones,which are surrounded by sags and have well-developed regional caprock and excellent hydrocarbon source condition. The main migration paths of hydrocarbon are fractures and weathering unconformity interfaces.Reservoir conditions are the factors dominating hydrocarbon enrichment and high- production.The reservoirs are mainly present in the weathering crust of buried-hills in longitudinal section and distributed along fractures in plane.It is believed that the Ordovician buried-hills developed along fractures are the most favourable exploration targets of Paleozoic buried-hill zones in this study area.