地质论评2025，Vol.71Issue(5)：1585-1596,12.DOI:10.16509/j.georeview.2025.02.021
渤海湾盆地太古宇变质岩潜山油气藏特征、主控要素及勘探方向
Hydrocarbon accumulation characteristics,key controlling factors,and exploration targets in Archean metamorphic buried-hill,Bohai Bay Basin
摘要
Abstract
Objectives:With the continuous discovery of large-scale integrated oil and gas fields such as BZ26-6 and BZ19-6,the Archean metamorphic buried-hill of the Bohai Bay Basin exhibit broad exploration prospects. Methods:Based on the dissection of typical oil and gas reservoirs as well as well logging and seismic data,this paper analyzes the distribution and development characteristics of oil and gas reservoirs in Archean metamorphic buried-hill of the Bohai Bay Basin,classifies the types of oil and gas reservoirs,summarizes the key controlling factors,and points out the direction for further exploration. Results:The results indicate that the distribution of oil and gas reservoirs is concentrated in the eastern part of the Bohai Bay Basin and significantly controlled by Cenozoic strike-slip faults.These reservoirs are characterized by deep burial,diverse lithologies,low porosity and permeability,normal to weak overpressure,and complex oil-water relationships.Based on the structure characteristics and source-hill relationship,oil and gas reservoirs are classified into two categories and four types.Source-hill contact type includes source-side type dominated by lateral migration and source-underlying type dominated by downward and lateral migration,source-hill separation type includes source-external type dominated by unconformity migration and source-upper type dominated by fault migration.Among them,source-underlying type in the low position and source-side type in the median position have greater exploration potential,followed by source-external type and source-upper type in the high position.Extensive source-hill contact area,sufficient hydrocarbon driving force,good sealing capacity,and fracture-dominated network reservoirs are the four key factors controlling the hydrocarbon accumulation in the buried-hill. Conclusions:In the future,emphasis should be placed on the source-underlying and source-side type buried-hill structural belts within depressions such as the Jiyang Depression,Bozhong Depression and Liaohe Depressions,as well as the adjacent concave-convex uplifts,and the internal structures of source-upper type and source-side type buried hills in steep fault zones such as the Jizhong and Huanghua Depressions.关键词
变质岩潜山/油气藏特征/主控因素/勘探方向/渤海湾盆地Key words
metamorphic buried hill/oil and gas reservoirs characteristics/main controlling factors/exploration direction/Bohai Bay Basin引用本文复制引用
郑定业,杨贵丽,林会喜,高晓鹏,郝运轻,梁裳恣,徐美娥,孙宜朴..渤海湾盆地太古宇变质岩潜山油气藏特征、主控要素及勘探方向[J].地质论评,2025,71(5):1585-1596,12.基金项目
本文为中石化科技部项目(编号:P24205)及中石化勘探开发研究院青年基金资助项目(编号:KTYZL2024090913)的成果. This study is supported by Science and Technology Project of Sinopec(No.P24205)and Youth Foundation of PEPRI Sinopec(No.KTYZL2024090913) （编号:P24205）
