摘要
基于环渤中地区油气勘探实践和浅层岩性油藏解剖,结合油气成藏要素的配置关系、富集规律研究,对其成藏主控因素与成藏模式进行总结,预测有利岩性油气藏勘探方向。研究认为,环渤中地区浅层岩性油藏富集主控因素为“脊-断-砂-带”4要素的耦合,深层汇聚脊是浅层油气富集的基础,切脊大断裂活动强度与盖层断接厚度控制油气垂向运移能力,大型砂体与切脊断裂耦合控制大规模油气充注,构造应力集中带断裂封闭能力影响岩性油气藏富集程度。通过对环渤中地区浅层岩性油藏的实例分析,建立凸起汇聚型、陡坡砂体汇聚型、凹中隆起汇聚型3种主要油气富集模式。
Based on the practice of oil and gas exploration and the analysis of shallow lithologic reservoirs,combined with the allocation relationship and enrichment law of oil and gas accumulation factors,main controlling factors and models of hydrocarbon accumulation of large lithologic reservoirs in shallow strata around the Bozhong sag are summarized,and favorable exploration areas are proposed.The coupling of the four factors of“ridge-fault-sand-zone”is crucial for the hydrocarbon enrichment in the shallow lithologic reservoirs.The convergence intensity of deep convergence ridges is the basis for shallow oil and gas enrichment,the activity intensity of large fault cutting ridges and the thickness of cap rocks control the vertical migration ability of oil and gas,the coupling degree of large sand bodies and fault cutting ridges control large-scale oil and gas filling,the fault sealing ability of structural stress concentration zones affects the enrichment degree of lithologic oil and gas reservoirs.Three enrichment models including uplift convergence type,steep slope sand convergence type and depression uplift convergence type are established through the case study of lithologic reservoirs in shallow strata around the Bozhong sag.
作者
周心怀
王德英
于海波
杨海风
李龙
ZHOU Xinhuai;WANG Deying;YU Haibo;YANG Haifeng;LI Long(Hainan Branch of CNOOC Ltd,Haikou 570100,China;Tianjin Branch of CNOOC Ltd,Tianjin 300459,China)
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2022年第4期660-669,740,共11页
Petroleum Exploration and Development
基金
“十二五”国家科技重大专项“渤海海域大中型油气田地质特征”(2011ZX05023-006-002)
“十三五”国家科技重大专项“渤海海域勘探新领域及关键技术研究”(2016ZX05024-003)。
关键词
浅层岩性油藏
主控因素
汇聚脊
成藏模式
环渤中地区
渤海湾盆地
shallow lithologic reservoir
main controlling factors
convergence ridge
accumulation model
Bozhong sag
Bohai Bay Basin
