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长6储层是魏家楼地区的主力产油层,储层物性差,注水开发见水快,开发难度大。为弄清地层见水快、油井含水高的原因,利用利用扫描电镜、铸体薄片和压汞试验方法,研究地层微观结构、储层孔喉分布、储层物性、岩石学特征和储层润湿性。结果表明:长6油藏属低孔超低渗油藏;储层以细-中粒长石砂岩为主;孔隙填隙物以绿泥石为主,绿泥石的垂直孔壁生长模式是储层低孔、低渗的主要原因;岩心主要为若亲水岩心;根据岩心压汞曲线特征,将储层孔隙机构分为三类。
Chang 6 Reservoir is the main oil production area in the Weijialou area, poor reservoir properties, water development, see water fast, difficult to develop. In order to find out the reasons why the water in the formation is fast and the water content in the well is high, the microstructure of the stratum, pore-throat distribution, reservoir physical property, petrological characteristic and reservoir run are studied by means of scanning electron microscopy, cast sheet and mercury intrusion test Wet. The results show that the Chang 6 reservoir is a low-porosity and ultra-low permeability reservoir; the reservoir is mainly fine-medium feldspar sandstone; the pore-filling material is mainly chlorite; and the vertical pore wall growth mode of chlorite is The main reason for the low porosity and low permeability of the reservoir is that the core of the core is mainly hydrophilic core. According to the characteristics of core mercury injection curve, the pore mechanism of reservoir is divided into three types.