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南翼山油田位于柴达木盆地西部北区,是在南北两翼同生断层挟持下形成的同沉积背斜,整体岩性较细,是目前柴达木盆地主要的难采储量分布区。为实现南翼山浅层低孔、低渗油田油藏的有效开发,开展了南翼山地区储层岩石类型及沉积模式研究。在系统总结前人对南翼山浅层油藏岩石类型认识的基础上,通过薄片观察、岩心描述、碳酸盐岩分析资料,综合分析认为南翼山浅层岩性主要以半深湖相泥质纹层与粉砂纹层互层为主,并针对研究区岩性的特殊性,结合南翼山岩石类型的实际情况,建议该区岩石命名采用成分命名原则。
The Nanyishan Oilfield is located in the northern part of the western Qaidam Basin. It is a co-sedimentary anticline formed under the co-occurrence of symbiotic faults between the north and south flanks. Its overall lithology is relatively small. It is the main hard-to-find reserves distribution area in the Qaidam Basin. In order to realize the effective development of the low-porosity and low permeability oilfields in the Nanyishan area, reservoir rock types and sedimentary models in the Nanyishan area have been studied. Based on the systematic understanding of the previous understanding of the rock types of the Nanyishan shallow reservoir, the shallow lithologies of the Nanyishan are mainly determined by thin-slice observation, core description and carbonate analysis. The semi-deep lake facies According to the peculiarity of lithology in the study area and the actual situation of the rock types in the Nanyishan area, it is suggested that the nomenclature of the composition of rocks should be adopted in this area.