渤海湾盆地渤中坳陷油气晚期成藏的流体包裹体证据

本文主要采用油气地球化学和包裹体分析技术,研究了渤中坳陷蓬莱19-3和渤中25-1二类油气田的油气成藏特征.指出两处明化镇组和馆陶组等浅层油气藏均为晚期(第四纪)形成,为相对连续的二期充注,早期注入的原油普遍遭受降解,之后注入的油相对较轻,成熟度较高.渤中25-1深层沙河街组油气藏为二-三期运聚成藏,中新世为主要成藏期,上新世末-第四纪时受区域新构造运动的影响,油气藏发生调整,油气藏中的部分油气向浅层运移,同时有较高成熟度的油气注入深部储层.

Fluid Inclusion Evidence for Late-stage Petroleum Accumulation,Bozhong Depresion,Bohai Gulf Basin

Oil/gas charge history of PL19-3 and BZ25-1 typical reservoirs were studied using geochemical and petroleum inclusion techniques.It suggested that shallow reservoirs,like PL19-3 and BZ25-1(Nm),were formed in later/Quaternary period,and that hydrocarbon charge were two relatively continuous stage charge,and that the first charge stage oil was generally biodegraded,and that the second charge stage oil was relatively lighter and more mature.Oil/gas charge to the deep reservoirs,like BZ25-1(E2s),was two-three s...