摘要
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。
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（E2 s）, was two-three stage charge, the major charge hap- pened in Miocene. These reservoirs had been adjusted with tectonic movements during the period of Pliocene to Quaternary. A part of oil/gas in the deep reservoirs migrated into shallow reservoirs along the fault or unconformity while some more mature oil/gas was filled to the deep reservoirs.
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2009年第1期24-33,共10页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金重大项目(40238059)
关键词
油气包裹体
油气运移
油气成藏
生物标志物
渤中坳陷
petroleum inclusion
oil/gas migration
petroleum accumulation
Biomarks
Bozhong depression
