摘要: |
东辛油田沙三中亚段发育大量与三角洲前缘滑塌相伴生的坡移浊积扇、滑塌浊积扇、远源浊积岩以及洪水成因的水下碎屑流,发育岩性油藏及岩性-构造油藏。纵向上,湖退体系域早期准层序组PS7~PS5是最主要的油气富集层位,其次为湖侵体系域PS8;平面上,各准层序组西部油气富集程度好于东部,含油储层主要为滑塌浊积扇及部分远源浊积岩,其次为坡移浊积扇。油气分布主要受宏观沉积相带、构造、微观储集物性和成岩作用等多种因素控制,距油源远近控制油藏纵向有利层位,砂体成因类型控制着平面有利区带。 |
关键词: 东辛油田 重力流沉积 岩性油藏 油气富集 控制因素 |
DOI: |
附件 |
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基金项目:教育部“长江学者与创新团队发展计划(IRT0684)”资助 |
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Sedimentary characteristics,hydrocarbon distribution and controls on the middle submember of the 3rd member of the Shahejie Formation in the Dongxin Oil Field,Dongying depression |
CHEN Xiu-yan, JIANG Zai-xing, SHI Jing, XU Jie |
(1. School of Energy Resources, China University of Geosciences, Beijing 100083, China; 2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China) |
Abstract: |
The lithologic oil pools and lithologic-structural pools oil are well developed in the slide turbidite fans,slump turbidite fans,distal turbidites and fluvial submarine debris flows deposits in the middle submember of the 3rd member of the Shahejie Formation in the Dongxin Oil Field,Dongying depression.Vertically,the prolific horizons mainly are involved in the parasequence sets PS7 to PS5 within the early regressive systems tract,followed by PS8 within the transgressive systems tract.By and large,the hydrocarbons are better enriched in the western parts than in the eastern parts.The hydrocarbon reservoirs are dominantly hosted to the slump turbidite fans,distal turbidites and slide turbidite fans.The main controlling factors contain macroscopic sedimentary facies zones,tectonism,microscopic physical properties and diagenesis. |
Key words: Dongxin Oil Field gravity flow deposits lithologic oil pool hydrocarbon accumulation controlling factor |