摘要
为了研究含油气盆地下生上储式生储盖组合油气的运聚成藏,在源断盖配置油气运聚有利部位及其影响因素研究的基础上,通过成熟区源岩及油源断裂有利部位确定有利油气输导源断配置关系和通过断盖配置断接厚度及其封油气所需的最小断接厚度确定断盖配置封闭油气区,将二者叠合建立了一套源断盖配置油气运聚有利部位预测方法,并将其应用于渤海湾盆地南堡凹陷西部东二段源断盖配置油气运聚有利部位的预测中。结果表明:南堡凹陷西部东二段源断盖配置油气运聚有利部位主要分布在老爷庙构造、南堡5号构造东部和南堡1号构造南部,有利于东二段油气聚集成藏,与目前南堡凹陷东二段已发现油气分布(南堡1号构造未发现油气是因为其构造顶部断盖配置不封闭,油气散失所致)相吻合,表明该方法用于预测源断盖配置油气运聚有利部位是可行的。
In order to study the oil-gas accumulation for the combination of lower source rock and upper reservoir in oil-gas bearing basins,on the bases of the researches on the favorable location of the hydrocarbon accumulation by the source-fault-caprock configuration and its influencing factors,by means of the favorable location between the source rock in the mature area and the oil-source fault,the favorable matching relationships for the hydrocarbon transportation and source-fault were established,and moreover with the help of the faulted thickness of the fault-caprock configuration and the minimal faulted thickness for sealing the oil and gas,the sealed zone by the fault-caprock configuration was ensured,and furthermore by means of the combination of the above two,a set of the predicting methods for the favorable location for the accumulated hydrocarbon by the source-fault-caprock configuration were established and moreover applied in the prediction of the favorable location for the hydrocarbon stated above in Member Ed2 in West Nanpu Sag of Bohai Bay Basin.The results show that the favorable location stated above is mainly distributed in Laoyemiao Structure,East No.5 Structure of Nanpu Sag,South No.1 Structure of Nanpu Sag,which is coincident with the discovered hydrocarbon distribution in Member Ed2 at present(The undiscovered oil and gas in No.1 Structure of Nanpu Sag are resulted from the unsealed zone of the fault-caprock configuration on the top of the structure and the hydrocarbon losses).The method is feasible to be applied in the prediction of the favorable location for the hydrocarbon migration and accumulation with the help of the source-fault-caprock configuration.
作者
田钊
TIAN Zhao(PetroChina Daqing Tamtsag LLC, Daqing 163618, China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2020年第4期42-47,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然科学基金项目“砂泥岩层系中油源断裂输导油气优势路径演化及识别研究”(41872157)。
关键词
源断盖配置
油气运聚
有利部位
预测方法
南堡凹陷
source-fault-caprock configuration
hydrocarbon migration and accumulation
favorable location
predicting method
Nanpu Sag
