摘要
为了研究含油气盆地油源断裂附近油气分布规律,在受油源断裂控制的不同层位油气运聚空间及分布部位研究的基础上,通过油源断裂在下部储层内输导油气有利部位,确定下部盖层油气运聚空间分布部位;通过油源断裂在下部储层内输导油气有利部位和下部区域性泥岩盖层渗漏部位,确定中部盖层油气运聚空间分布部位;通过油源断裂在下部储层内输导油气有利部位、下部和中部区域性泥岩盖层渗漏部位,确定上部盖层油气运聚空间分布部位;三者组合建立了一套受油源断裂控制的不同层位油气运聚空间分布部位的预测方法,并将其应用于渤海湾盆地歧口凹陷受港东断裂控制的不同层位油气运聚空间分布部位的预测。结果表明:除西南部端部外,其余部位皆为受港东断裂控制的沙三段源岩—沙一中亚段盖层油气运聚空间分布部位;受港东断裂控制的沙三段源岩—东二段盖层和沙三段源岩—明化镇组盖层油气运聚空间分布部位均在其中部,前者分布范围略大于后者。这些分布部位分别有利于下伏沙三段源岩生成的油气在港东断裂附近的沙一中亚段、东二段和明化镇组区域性泥岩盖层之下的储层中运聚成藏。该预测方法的预测结果与目前港东断裂附近沙一中亚段、东二段和明化镇组区域性泥岩盖层之下储层中已发现油气分布相吻合。
In order to study the distribution law of oil and gas near oil source faults in petroliferous basins,based on the study of spatial distribution of oil and gas migration and accumulation in different layers controlled by oil source faults,through the oil source faults transporting favorable positions of oil and gas in the lower reservoir,the spatial distribution position of oil and gas migration and accumulation between source rock and lower cap rock controlled by oil source faults is determined.The spatial distribution of hydrocarbon migration and accumulation between source rock and middle cap rock controlled by oil source faults is determined through the oil source faults transporting favorable parts of oil and gas in the lower reservoir and the leakage parts of regional mudstone caprock in the lower reservoir.The spatial distribution of oil and gas migration and accumulation from the source rock to the upper cap rock controlled by oil source faults is determined by the oil source fault in the favorable part of oil and gas transmission in the lower reservoir and the leakage parts of the lower and central regional mudstone cap rocks.A prediction methods of hydrocarbon migration and accumulation space distribution positions in different layers controlled by oil source faults was established by the combination of the three.The results show that,except the western end,the rest parts are the spatial distribution parts of oil and gas migration and accumulation from the source rock of the Es^(3) Formation to the caprock of the Es^(1z) Formation controlled by Gangdong fault.The spatial distribution of hydrocarbon migration and accumulation in the source rock of the Es^(3) Formation and the caprock of the Ed^(2) Formation,which are controlled by Gangdong fault,are distributed in its middle part,the former is slightly larger than the latter.These position are respectively beneficial to oil and gas generated by the source rock of the Es^(3) Formation migration and accumulation to the reservoirs under the regional mudstone caprock of the Es^(1z) Formation,the Ed^(2) Formation and Nm Formation near Gangdong fault,it is consistent with the oil and gas distribution found in the reservoirs under the regional mudstone caprock of the Es^(1z) Formation,the Ed^(2) Formation and Nm Formation near Gangdong fault at present,indicating that the method is feasible to predict the hydrocarbon migration and accumulation space distribution positions in different layers controlled by oil source faults.
作者
许凤鸣
Xu Fengming(Exploration Department of Daqing Oilfield Company Ltd.,Daqing 163453,Heilongjiang,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2024年第2期461-469,共9页
Journal of Jilin University：Earth Science Edition
基金
黑龙江省自然科学基金项目(LH2022D013,LH2023D005)
2021年黑龙江省中央支持地方高校青年骨干人才项目(14011202101)
黑龙江省重点研发计划项目(JD22A022)。
关键词
油源断裂
油气运聚空间
分布部位
预测方法
歧口凹陷
oil source fault
hydrocarbon migration and accumulation space
distribution position
prediction method
Qikou depression
