沾化凹陷孤北洼陷古近系油气成藏组合特征  

Oil-Gas Play Characters Analysis of Tertiary Formation, Gubei Depression, Zhanhua Sunken

作　　者：辛也 田雯 刘惠民[2] 

机构地区：[1]中国石油化工股份有限公司胜利油田分公司勘探开发研究院,山东 东营 [2]中国石油化工股份有限公司胜利油田分公司,山东 东营

出　　处：《地球科学前沿（汉斯）》2020年第12期1146-1156,共11页Advances in Geosciences

摘　　要：孤北地区位于沾化洼陷东部,勘探面积约300 km2。通过油源对比、储层特征、盖层特征及油气藏特征,将孤北地区已知油气藏划分为源内自生自储油气成藏组合、源内旁生侧储油气成藏组合、混源旁生侧储油气成藏组合及混源下生上储油气成藏组合,解释了孤北洼陷存在五类油气成藏模式。沉积相带、断裂是成藏组合油气成藏的关键因素。在异常高压的作用下,油气沿断裂及骨架砂体共同组成油气二次运移的立体网络,使洼陷带、缓坡带、台阶带等构造岩相带都能够成为油气运移的有利指向。The Gubei depression locates in eastern division of Zhanhua Sunken. There are four types of oil-gas play (inner-source inner reservoir oil play, inner-source side-reservoir oil play, mixed-source side-reservoir oil play, mixed-source upper-reservoir oil play) according to the oil-source analysis, reservoir characters, capping formations and oil-gas reservoir characters. The oil reservoir forming pattern can be divided to five types. The key factors for the oil-gas play are sedimentary facies and faults. Oil migrate upward along oil-source fault and migrate landscape orientation along unconformity surface and sand-body providing sufficient oil source in forming reservoirs affected by abnormal pressure. Each tectonic facie belt in deep depression, gentle slope and bench belt can be the beneficial direction of oil and gas migration.

关 键 词：油气成藏组合 成藏模式 古近系 孤北洼陷 

分 类 号：P61[天文地球—矿床学]