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鄂尔多斯盆地寒武系海相碳酸盐岩沉积特征和储层发育模式研究

The Sedimentary Characteristics and Reservoir Development Patterns of Cambrian Marine Carbonate Rocks in the Ordos Basin

卿山, 夏青松

Environment and Resource / 2026,8(2): 204-208 / 2026-04-29 7 2

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• Information:

  西南石油大学，成都

• Keywords:
  Ordos Basin; Cambrian; Marine carbonates; Sedimentary characteristics; Reservoir development model
  鄂尔多斯盆地; 寒武系; 海相碳酸盐岩; 沉积特征; 储层发育模式
• Abstract: Cambrian marine carbonates in the Ordos Basin are important target strata for deep oil and gas exploration. Studying their sedimentary characteristics and reservoir development patterns is of key significance for exploration planning. Based on new drilling, seismic data, and facies identification techniques, this study systematically analyzes the petrological characteristics, sedimentary facies types, and sedimentary environment evolution of Cambrian marine carbonates in the basin, clarifies the reservoir rock types, storage space characteristics, and physical properties, and explores the controlling mechanisms of reservoir development by sedimentary, diagenetic, and tectonic processes, ultimately establishing a reservoir development model. The study shows that Cambrian marine carbonates are dominated by oolitic limestone and powder-fine crystalline limestone, developing sedimentary facies types such as platform-margin shoals and platform-interior shoals, with sedimentary environments controlled by the “three uplifts and four depressions” paleogeographic pattern; reservoirs are mainly characterized by low porosity and low permeability, with storage spaces including residual intergranular pores and dissolution cavities; dolomitization, karst modification, and ancient uplift tectonic background are the core controlling factors for reservoir development. 鄂尔多斯盆地寒武系海相碳酸盐岩是深层油气勘探的重要目标层系，其沉积特征与储层发育模式的研究对勘探部署具有关键意义。基于新钻井、地震资料及岩相识别技术，系统分析该盆地寒武系海相碳酸盐岩的岩石学特征、沉积相类型、沉积环境演化规律，明确储层岩石类型、储集空间特征及物性表现，探讨沉积、成岩和构造作用对储层发育的控制机制，最终建立储层发育模式。研究表明，寒武系海相碳酸盐岩以鲕粒云岩、粉—细晶云岩为主，发育台缘滩、台内滩等沉积相类型，沉积环境受“三隆四坳”古地理格局控制；储层以低孔隙度—低渗透率为主要特征，储集空间包括残余粒间孔、溶蚀孔洞等；白云石化作用、岩溶改造及古隆起构造背景是储层发育的核心控制因素。
• DOI: 10.35534/er.0802027 (registering DOI)
• Cite: 卿山，夏青松．鄂尔多斯盆地寒武系海相碳酸盐岩沉积特征和储层发育模式研究［J］．环境与资源，2026，8（2）：204-208.