摘要
只有那些在油气运移之前或同时发育且位于油气运移区的圈闭才能形成油气藏,成为油气勘探的目标。为了确定渤海湾盆地黄骅坳陷下古生界奥陶系碳酸盐岩油气运移和聚集的时空领域,本文测试了流体包裹体均一温度、自生伊利石K/Ar 同位素年龄,应用盆地模拟技术分析了构造发育史、有机质热演化史、生烃史和排烃史,并对所有流体包襄体样品各期次的均一温度所对应的成藏期进行了数理统计分析,得出该坳陷油气运聚的主要时期为印支期(T_3)、燕山期(K_1～K_2)和喜玛拉雅期(E_2～N_1)。不同运移时期有机包襄体的分布代表了当时油气运移的区域。印支期油气运移和聚集的区域主要分布在黄骅坳陷的西南部地区,燕山期(K_1～K_2)东扩至坳陷的东边界,喜玛拉雅期(E_2～N_1)油气运聚区域达到坳陷的中部地区。黄骅坳陷奥陶系碳酸盐岩原生油气藏的勘探,应注重那些位于坳陷西南部印支期形成且表被后期构造运动破坏的古构造。
Only the traps developed before or at the same time of hydrocarbon migration could be charged by hydrocarbons and formed reservoirs. To determine the time and space domains of hydrocarbon migration and accumulation in the Ordovician carbonates of the Huanghua depression in the Bohaiwan basin, China, the homogenization temperature of the fluid inclusions and K/Ar isotopic ages of the autogenous illites were measured, and the structural developing history,the thermal history, hydrocarbon generation history and migration history of the depression were analyzed. Then the mathematical statistics of hydrocarbon migration times corresponding to the homogenization temperature of the fluid inclusions in the different stages of all the samples was carried out to avoid the uncertainty of the migration times. As the results show, the hydrocarbon migration and accumulation in the Huanghua depression took place in Indosinian epoch, Yanshan epoch and Himalayan epoch. The distribution areas of organic fluid inclusions showed the areas of the hydrocarbon migration and accumulation. The hydrocarbon migration area in the Indosinian epoch （T3 ） was in the southwestern Huanghua depression, then expanded to the eastern boundary of the depression during the Yanshan epoch （ K1-K2 ） , and finally reached the northern Huanghua depression in the Himalayan epoch （ E2-N1 ）. The petroleum exploration of the Ordovician carbonates should have been focused on the traps in the southwestern Huanghua depression that formed in the Indosinian epoch and haven＇t been destroyed by later structural movements.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期1449-1460,共12页
Acta Petrologica Sinica
基金
国家"十五"重大科技攻关项日(批准号:2001BA605A08)
国家自然科学基金项目(批准号:40372102)资助.
关键词
有机包裹体
油气藏
油气运移
奥陶系
同位素测年
盆地模拟
成藏史
黄骅坳陷
Organic fluid inclusion, Reservoir, Hydrocarbon migration, Ordovician, Isotopic dating, Basin modeling, Reservoirforming history, Huanghua depression
