“断凸”对金龙油田火山岩储集层的控制作用

发布时间：2018-12-21 09:24

【摘要】：准噶尔盆地西北缘中拐凸起东斜坡佳木河组"断凸"古地貌对金龙油田佳木河组火山岩储集层的发育特征有着多方面的控制作用。利用岩心、钻井、测井、地震、普通薄片及物性资料,综合分析了"断凸"对佳木河组火山岩岩性、岩相、有利储集层、圈闭和油气藏分布的控制作用,为下一步有利火山岩储集层预测和勘探部署提供依据。研究区火山岩类储集层岩性分为火山熔岩、火山碎屑熔岩、火山碎屑岩以及沉火山碎屑岩4大类,受"断凸"控制,整体上自西向东火山作用减弱,而沉积作用增强,导致了岩相上由火山口相、爆发相、喷溢相过渡为火山沉积相。"断凸"控制的岩性、岩相、构造断裂及风化淋滤作用是储集层的主要控制因素。研究区最好的储集层分布于断凸带的构造高部位。"断凸"的形成直接控制了断块、断鼻型和断凸带东部岩性尖灭型圈闭和油气藏类型分布。
[Abstract]:The "fault-convex" paleogeomorphology of Jiamuhe formation on the eastern slope of Zhongguai uplift in the northwestern margin of Junggar Basin controls the development of volcanic reservoir of Jiamuhe formation in Jinlong Oilfield in many aspects. Based on the core, drilling, logging, seismic, ordinary sheet and physical property data, the controlling effect of "fault convex" on volcanic lithology, lithofacies, favorable reservoir, trap and distribution of oil and gas reservoir of Jiamuhe formation is analyzed synthetically. It provides the basis for further favorable volcanic reservoir prediction and exploration deployment. The lithology of volcanic rock reservoir in the study area is divided into four categories: volcanic lava, pyroclastic rock and sedimentary pyroclastic rock. Controlled by "fault-convex", the volcanism is weakened from west to east, while the sedimentary process is enhanced. This has resulted in the transition of lithofacies from crater facies, eruptive facies and ejection facies to volcanic sedimentary facies. " The lithology, lithofacies, structural fracture and weathering and leaching are the main controlling factors of reservoir. The best reservoir in the study area is located in the structural high position of the fault-convex zone. The formation of "fault-convex" directly controls the distribution of fault blocks, lithologic pinnacle traps and oil-gas reservoir types in the eastern part of the fault-nose type and the eastern part of the fault-convex zone.
【作者单位】：中国地质调查局西安地质调查中心;中国石油新疆油田分公司勘探开发研究院;中国石油大学油气资源与探测国家重点实验室;
【基金】：国家973项目(2015CB250900)
【分类号】：P618.13

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