| 摘要: |
| 以渤海湾盆地潜山油气勘探实践为基础,综合前人研究成果,系统对比分析不同凹(坳)陷潜山油气成藏条件、油气富集差异性,并探讨其主要控制因素。研究表明:前古近纪构造演化造就了Ⅰ、Ⅱ、Ⅲ型三类基底,新生代构造差异演化形成了早期型、继承型和晚期型三类凹陷,凹陷演化的差异性控制了烃源岩层系由盆地外围早期型凹陷到中心晚期型凹陷逐步变浅,由Ⅰ类基底向Ⅲ类基底,优质储层规模逐渐减小,输导条件逐步变差;潜山油气的宏观分布受前古近纪与新生代演化共同控制,主要富集在Ⅰ、Ⅱ类基底与继承型、早期型耦合的富油气凹陷中;潜山油气的富集程度受凹陷的富油气性、烃源岩层系、优质储层发育规模以及供油窗口等综合因素控制;对不同成藏条件进行定量化,建立潜山油气藏形成的“源-储-导”三元耦合控藏模式,储集条件为首要控制因素。 |
| 关键词: 潜山油气藏 成藏条件 富集特征 控制因素 定量评价 渤海湾盆地 |
| DOI：10.3969/j.issn.1673-5005.2015.03.003 |
| 分类号::TE 122.1 |
| 基金项目:国家油气重大专项课题(2011ZX05006-003) |
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| Enrichment characteristics and main controlling factors of hydrocarbon in buried hill of Bohai Bay Basin |
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JIANG Youlu1, YE Tao2, ZHANG Shanwen3, LIU Hua1
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(1.School of Geosciences in China University of Petroleum, Qingdao 266580, China;2.China National Offshore Oilfield Corporation Limited-Tianjin, Tianjin 300452, China; ;3.Shengli Oilfield Company Limited, SINOPEC, Dongying 257015, China)
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| Abstract: |
| Based on exploration results and previous studies, the hydrocarbon accumulation conditions were summarized and the differences were compared in different sags of the Bohai Bay Basin. The results show that the pre-Cenozoic tectonic evolution created three types of basement. Evolution of the Cenozoic formed three types of sags:basin of early rift, basin of inheritance rift and basin of lately rift. Evolution differences controlled the distribution of source rock in the sag. The source rock gradually migrated to shallow depth from the periphery to the center of basin. The distribution of reservoir and transport condition became poor gradually from type Ⅰ basement to type Ⅲ basement. Hydrocarbon enrichment is controlled by the pre-Cenozoic and Cenozoic evolution. Hydrocarbon mainly gathered in those sags with type I or type II basement and also with evolution type of inheritance or early rift basin. The hydrocarbon enrichment is controlled simultaneously by the source rock horizon, the scale of high quality reservoir and the formation of oil supplying window. Our study quantifies different hydrocarbon accumulation conditions, and suggests that three factors, including "source-reservoir-migration" which couple with each other, control the mode of the buried hill reservoirs, and the reservoir conditions are the main controlling factors. |
| Key words: buried hill reservoir formation condition enrichment characteristic controlling factor quantitative evaluation Bohai Bay Basin |
