渤海湾盆地缓坡外带成藏特征与勘探潜力分析  

Hydrocarbon Accumulation and Exploration Potential of Outer Gentle Slope Zone in Bohai Bay Basin

作　　者：汪少勇[1] 黄福喜[1] 宋涛[1] 吕维宁[1] 刘策[1] 贾鹏[1] 范晶晶 Wang Shaoyong;Huang Fuxi;Song Tao;Lyu Weining;Liu Ce;Jia Peng;Fan Jingjing(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China)

机构地区：[1]中国石油勘探开发研究院

出　　处：《特种油气藏》2020年第1期9-16,共8页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“陆上油气勘探技术发展战略研究”（2017ZX05001-005）

摘　　要：为了明确渤海湾盆地缓坡外带浅层油藏勘探潜力,利用已有的测录井、地震及分析化验资料,从烃源岩生烃与运移、储层类型及储盖组合、油藏类型及成藏模式等方面对冀中、黄骅坳陷6个典型缓坡外带的成藏特征进行剖析,并结合资源量估算结果,对其勘探潜力进行了研究。结果表明:渤海湾盆地富油气凹陷缓坡外带油源充足,纵向上发育新生界碎屑岩和中生界—前寒武系潜山两大类储层,可形成多种类型油藏。6个典型缓坡外带剩余地质资源量为4.3×10^8t,其中,文安斜坡东营组、沙三段构造-岩性油藏和中生界、古生界潜山油藏勘探潜力最好,束鹿西斜坡、港北斜坡、蠡县斜坡、孔西斜坡、埕北斜坡构造-岩性油藏和潜山油藏也具有较大勘探潜力。从层系上看,6个缓坡外带构造-岩性油藏主要分布在馆陶组、东营组、沙二段、沙三段和孔二段;潜山油藏主要分布在石炭系—二叠系、奥陶系、寒武系和前寒武系。通过对缓坡外带勘探潜力的认识,可为渤海湾盆地相似领域油气勘探提供借鉴。The available well logging,mud logging,seismic and test data were used to clarify the exploration potential of shallow reservoirs in the outer gentle slope zone of the Bohai Bay Basin.The hydrocarbon accumulation patterns of 6 typical outer gentle slope zones in central Hebei and Huanghua Depression were analyzed from the hydrocarbon generation and migration of source-rocks,reservoir type and reservoir-caprock combination,reservoir category and hydrocarbon accumulation modes.The resource estimations were combined to analyze their exploration potentials.Result shows that the outer gentle slope zones of hydrocarbon-rich depression in Bohai Bay Basin show a rich oil-source.There are two sets of reservoirs in the longitudinal direction,namely the Cenozoic clastic and the Mesozoic-Precambrian buried-hill reservoirs,which include multiple reservoir types.The remaining geological resources of the 6 typical outer gentle slope zones are 4.3×108t.The most favorable exploration targets include Dongying Group of Wen'an Slope,structure-lithology reservoirs in Shahejie-3 Member,Mesozoic and Paleozoic buried-hill reservoirs.The Shulu West Slope,Gangbei Slope,Lixian Slope,Kongxi Slope,the structure-lithology reservoirs and buried-hill reservoirs in the Chengbei Slope also indicate great exploration potential.From the stratum perspective,the structure-lithology reservoirs in the 6 outer gentle slope zones mainly distribute in the Guantao Formation,Dongying Formation,Shahejie-2 Member,Shahejie-3 Member and Kong-2 Member.The buried-hill reservoirs mainly distribute in the Carboniferous-Permian,Ordovician,Cambrian and Precambrian.The understanding of the outer gentle slope zone exploration potentials could provide certain reference for the hydrocarbon exploration of similar areas in Bohai Bay Basin.

关 键 词：缓坡外带 成藏特征 浅层油藏 潜山 勘探潜力 渤海湾盆地 

分 类 号：TE121[石油与天然气工程—油气勘探]