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塔里木盆地中寒武统蒸发台地白云岩具有良好的勘探前景。在野外露头、普通薄片、扫描电镜、阴极发光及地球化学资料分析的基础上,对塔里木盆地肖尔布拉克剖面中寒武统白云岩储层特征进行了研究。结果表明:研究区中寒武统岩石类型多样,储集空间以溶蚀孔、垮塌孔洞(垮塌遮蔽孔)为主;结合孔洞分布特征、伴生矿物和地球化学特征,探讨了储层成因机理,认为研究区储层成因包括同生期大气水溶蚀、浅埋藏期垮塌堆积和深埋藏期热液溶蚀3种机理,其中前两者受海平面变化控制,分布范围广,埋藏期热液溶蚀作用纵向上与深大断层伴生,其溶蚀范围平面上呈层状分布,存在改造早期溶蚀孔洞的现象。
The Middle Cambrian evapotranspiration platform dolomite in the Tarim Basin has a good exploration prospect. The characteristics of the Middle Cambrian dolomite reservoirs in the Shoballak section of the Tarim Basin have been studied based on the outcrop, ordinary thin slices, SEM, cathodoluminescence and geochemical data. The results show that there are many types of rocks in the middle Cambrian in the study area, and the reservoir space mainly consists of dissolution holes and collapsed holes (collapsed sheltered holes). Based on the distribution characteristics of the holes, associated minerals and geochemical characteristics, the formation mechanism of the reservoirs is discussed. The reservoir causes of the study area include three mechanisms: atmospheric water erosion during the same period, collapse and accumulation during the shallow burial period, and hydrothermal dissolution during the deep burial period. The first two are controlled by the sea level changes with a wide range of distribution, and the hydrothermal dissolution during the burial period is vertical Upper faults are associated with the deep faults, and their dissolution ranges are layered on the plane. There is a phenomenon of reforming the early erosion holes.