焉耆盆地四十里城地区八道湾组全油气系统成藏特征与模式
王国臻 , 唐勇 , 潘春年 , 皮定成 , 唐贵 , 张佳
地学前缘 ›› 2026, Vol. 33 ›› Issue (5) : 423 -434.
焉耆盆地四十里城地区八道湾组全油气系统成藏特征与模式
The characteristics and reservoir formation models of the whole petroleum system of the Badaowan Formation in the Sishilicheng blocks of the Yanqi Basin
全油气系统理论能够解释常规-非常规资源有序共生机理。焉耆盆地四十里城地区八道湾组包含了页岩油、致密油与常规油3种类型资源,具备全油气系统特征。基于全油气系统理论,对区内八道湾组常规-非常规资源开展了成藏静态要素匹配与成藏动态要素演化分析,明确了各类型资源成藏特征,建立了全油气系统成藏模式。研究表明:研究区八道湾组构造油藏、致密油藏、页岩油藏序列共生,各类型油气成藏特征差异明显;研究区八道湾组全油气系统成藏条件良好,烃源岩供应了充足的油气、多类型储集层提供了有利储集空间、区域盖层封闭性能较强、地层产状与断层控制了油气运移与圈闭、常规-非常规资源成藏要素具有时间匹配性;在研究区低部位凹陷区,非常规油藏具有滞留成藏、源储紧邻、超压驱动特征;而在斜坡带高部位西北缘,常规油藏具有源储分离、长距离运移、浮力驱动特征。
The theory of the whole petroleum system (WPS) can explain the orderly coexistence mechanism of conventional and unconventional resources. The Badaowan Formation in the Sishilicheng area of the Yanqi Basin contains three types of resources: shale oil, tight oil, and conventional oil, exhibiting characteristics of a whole petroleum system. Based on the theory of the whole petroleum system, a static element matching analysis and a dynamic element evolution analysis of reservoir formation were conducted for the conventional and unconventional resources in the Badaowan Formation within the area. This analysis clarified the reservoir formation characteristics of each type of resource and established a reservoir formation model for the whole petroleum system. The research indicates that in the study area, the Badaowan Formation features a sequential coexistence of structural oil reservoirs, tight oil reservoirs, and shale oil reservoirs, with significant differences in the reservoir formation characteristics of various types of oil and gas. The whole petroleum system in the Badaowan Formation of the study area has favorable reservoir formation conditions, with source rocks supplying sufficient oil and gas, multiple types of reservoirs providing favorable storage space, strong sealing performance of regional cap rocks, stratigraphic occurrence and faults controlling oil and gas migration and entrapment, and time matching of reservoir formation elements for conventional and unconventional resources. In the low-lying sag area of the study area, unconventional oil reservoirs exhibit characteristics of retention and accumulation, close proximity of source and reservoir, and overpressure driving. In the high-lying northwest edge of the slope zone, conventional oil reservoirs exhibit characteristics of source-reservoir separation, long-distance migration, and buoyancy driving.
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新型油气勘探开发国家科技重大专项“准噶尔盆地全油气系统与新领域勘探技术(2025ZD1400300)”
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