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珠江口盆地珠一坳陷惠陆油区具有3个经油气勘探证实的含油气系统,分别是惠西、惠东、惠中北含油气系统。惠西与惠东含油气系统烃源岩为始新统文昌组中深湖相;而惠中北含油气系统烃源岩为下渐新统恩平组煤系。惠陆油区油气运聚成藏模式存在2种类型即:古近系半地堑洼陷自源型油气运聚成藏模式与三角洲砂岩及生物礁外源型油气运聚成藏模式。前者油气运聚成藏的主控因素,主要取决于半地堑洼陷内生烃灶充足的烃源供给、优质储盖组合及圈闭的良好配置。这种油气藏分布于半地堑洼陷之内,具有自生自储近源运聚成藏特征,由于此类油藏埋深较深,深部储层物性优劣是油气成藏的关键;后者油气运聚成藏主控因素,则主要取决于富生烃洼陷及其附近的油源断裂和输导砂体及不整合面组成的复合运聚疏导体系与浅层不同类型有效圈闭的连通配置和相互衔接耦合。
There are three proven petroleum systems in the Hui Lu oil-field of Zhu 1 Depression in the Pearl River Mouth Basin, namely Huixi, Huidong and Huizhongbei oil and gas systems. The source rocks of the Huixi and Huidong hydrocarbon-bearing systems are middle-deep and deep-lacustrine from the Eocene Wenchang Formation, while the source rocks of the Huizhong-Peiche reservoirs are the Lower Permian Enping Formation coal measures. There are two types of hydrocarbon accumulation and accumulation in the Hui Lu area, namely, the self-source hydrocarbon accumulation and accumulation model in the Paleogene semi-graben sag and the extrinsic hydrocarbon migration and accumulation model in the deltaic sandstone and reef. The main controlling factor for the former hydrocarbon accumulation and accumulation mainly depends on the sufficient source of hydrocarbon in the semi-graben sands and the good configuration of high-quality reservoir-cap combination and trap. These reservoirs are distributed within semi-graben sags and have the characteristics of spontaneous self-accumulation and accumulation of near-origin hydrocarbon. Due to the deep burial depth of these reservoirs, the reservoir properties of deep reservoirs are the key to the hydrocarbon accumulation. The main controlling factors of hydrocarbon migration and accumulation are mainly oil-source fracture and oil-bearing sand bodies and unconformities in the pros and cons of the hydrocarbon-rich hydrocarbon depressions and the complex transport and drainage systems with different effective traps Connected configuration and mutual coupling coupling.