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通过大量的岩心观察、薄片鉴定与实验研究,对该区储层岩石学特征进行研究。研究表明:该区岩石类型为长石岩屑砂岩和长石岩屑粉砂岩,重矿物主要为锆石,其次为白钛石、绿帘石,砂岩粒度一般为0.03～0.15mm,多数为宽峰,少数尖峰分布和宽平峰分布,磨圆度为次圆状,砂岩支撑类型整体上为颗粒支撑,碎屑颗粒接触方式以线接触为主,有少数点接触,未见缝合线接触,颗粒胶接类型以孔隙式胶结为主。
Through a large number of core observation, thin slice identification and experimental research, the petrological characteristics of the reservoir are studied. The results show that the rock types in this area are feldspar lithic sandstone and feldspar lithic siltstone, the heavy minerals are mainly zircon, followed by white titanium stone and epidote, the grain size of sandstone is generally 0.03 ~ 0.15mm, the majority is wide Peak, spikelet distribution and broad flat peak distribution. The roundness of the sandstone was sub-circular, and the sandstone support type was particle support as a whole. The contact of detritus particles was mainly line contact with few points of contact, no suture contact, Bonding type to the main type of porous cement.