准噶尔盆地西北缘风城组湖相喷流岩致密油储层特征
首发时间:2017-05-16
摘要:准噶尔盆地西北缘乌尔禾地区二叠系风城组致密油储层属于典型的湖相"白烟型"喷流岩。在岩芯观察和薄片鉴定基础上,结合物质组分和物性分析等资料,探讨了风城组喷流岩致密油储层特征和储层发育控制因素,确定云质喷流岩类是储层主要岩石类型,储层发育同时受沉积相、成岩作用、构造和异常高压复合控制,并受断裂带和斜坡区两个不同构造背景性质的小区块控制,其中断裂带主要发育裂缝型和孔隙-裂缝型储层,斜坡区以裂缝-孔隙型储层为主。在上述研究基础上,提出半深湖-深湖相沉积环境是喷流岩储层发育的背景条件,云质和凝灰质喷流岩是储层发育的物质基础,破裂和溶蚀作用是提高致密油储层级别和形成好储层的必要过程,而裂缝发育带和异常高压区往往是致密油储层中"甜点"的产出位置。
关键词: 沉积学 白烟型 喷流岩 致密油储层 控制因素 二叠系风城组 准噶尔盆地西北缘
For information in English, please click here
Tight Oil Reservoir in Lacustrine Exhalative Rock of the Permian Fengcheng Formation
Abstract:The Permian Fengcheng Formation lacustrine "white smoke type" exhalative rock in Urho area, Junggar Basin is typical tight oil reservoir. Based on core description, thin section identification, comprehensive data of sedimentology and physical property, the reservoir characteristics and their controlling factors of the Fengcheng Formation were discussed in detail. It's believed that dolomitized rocks are the main reservoirs, and the reservoir development is multiply controlled by sedimentary facies, diagenesis, tectonism and overpressure. The reservoir type is controlled by two small blocks with different tectonic settings, fault zone and slope area. Fracture reservoir and pore-fracture reservoir are mainly developed in fault zone, and fracture-pore reservoir is mainly developed in slope area. At the base of above-mentioned research, it is proposed that the semi-deep to deep lacustrine facies is background condition, argillaceous dolomite and dolomitized mudstone is the material foundation, fracturing and dissolution is necessary to improve reservoir quality and generate superior reservior, overpressure is usually "sweet spot" in tight oil reservoir.
Keywords: sedimentology
论文图表:
引用
No.4733414114164914****
同行评议
共计0人参与
勘误表
准噶尔盆地西北缘风城组湖相喷流岩致密油储层特征
评论
全部评论0/1000