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通过对鄂尔多斯盆地下奥陶统马家沟组主要合气层段岩心的地质测量和显微镜图象自动扫描分析，建立了３个用于定量描述裂缝发育状况的地质参数，并进而将研究层段中的微细裂缝细分为４种成因的１０种类型。研究结果表明，构造裂缝及岩溶裂缝是马家沟组储气层中最重要的裂缝类型。平面上，构造剪切缝主要分布在盆地边缘，构造张性缝主要分布在陕８井、陕１１井和陕１６井附近；垂向上，马五４段是构造裂缝的主要发育层段。岩溶裂缝与古岩溶地貌关系密切，往往集中分布于古岩溶洞穴附近。
Through the geological survey and microscopic image automatic scanning analysis of the core of the main gas bearing section of the Lower Ordovician Majiagou Formation in the Ordos Basin, three geological parameters for quantitatively describing the fracture development status are established, and then the research interval The fine cracks are subdivided into 10 types of 4 causes. The results show that structural fractures and karst fractures are the most important types of fractures in the Majiagou Formation. In the plane, the structural shear seams are mainly distributed at the margin of the basin. Tensile seams are mainly distributed around Shaan 8, Shan 11 and Shaan 16 wells. In the vertical direction, Ma 5 4 is the main development interval of structural fractures. Karst fractures and ancient karst landforms are closely related, often concentrated in ancient karst cave near.