The Cambrian system in the Ordos Basin has good exploration potential, and the Zhangxia Formation and the Sanshanzi Formation of the Middle and Upper Cambrian are important targets for the exploration of the Cambrian system. In this paper, the characteristics, genesis and main controlling factors of the Zhangxia Formation and the Sanshanzi Formation reservoir are studied through field section observation, thin section observation, drilling and geophysical logging data combined with experimental analysis data. The reservoir space types of the Cambrian carbonate rocks in the Ordos Basin mainly include intercrystalline pores, intercrystalline dissolution pores, dissolution pores, dissolution sutures and dissolution fractures, among which intercrystalline dissolution pores, dissolution pores and dissolution fractures constitute the most important reservoir space type. There are three reservoir types: pore type, fracture - dissolution cavity type and fracture type. The development of Cambrian strata in Ordos Basin is mainly controlled by three factors: high-energy sedimentary facies zone, epigenetic diagenesis and tectonic movement. Granular beach facies and dolomite tidal flat facies are favorable zones for reservoir development in Zhangxia Formation and Sanshanzi Formation. The fault zone in the basin provides a migration channel for late hydrothermal fluid, which can significantly improve reservoir performance. Tectonic fracture itself is an effective pore system, which becomes the migration channel of geological fluid, and also plays a role in communicating pores, which plays a positive role in reservoir.

鄂尔多斯盆地寒武系具有良好的勘探潜力，中上寒武统张夏组和三山子组是寒武系勘探的重要目标。本文通过现场剖面观测、薄片观测、钻井和地球物理测井资料结合实验分析资料，对张夏组和三山子组储层特征、成因及主控因素进行了研究。鄂尔多斯盆地寒武系碳酸盐岩储集空间类型主要包括晶间孔、晶间溶孔、溶孔、溶蚀缝合带和溶蚀裂缝等，其中晶间溶孔、溶孔和溶蚀裂缝是最重要的储集空间类型。储层类型可分为孔隙型、裂缝-溶洞型、裂缝型三种。鄂尔多斯盆地寒武系地层发育主要受高能沉积相带、表观成岩作用和构造运动三个因素控制。颗粒滩相和白云岩潮坪相是张夏组和三山子组储层发育的有利区带。盆地断裂带为晚期热液提供了运移通道，可显着改善储层动态。构造裂缝本身是一种有效的孔隙系统，成为地质流体的运移通道，同时还起到连通孔隙的作用，对储层发挥着积极的作用。