靖边气田高桥－杏河地区马五1+2段储层发育特征及其主控因素

为查明靖边气田高桥－杏河地区马五1+2段储层的发育特征及主控因素，通过岩心、薄片进行观察及压汞实验分析储层物性，结合沉积、成岩及构造要素分析孔隙空间发育控制因素。结果表明:马五1+2段主要发育形状不规则的膏溶孔和构造缝，吼道宽度较大，原生晶间孔少量发育，孔吼细小，储层主要以低部渗透性为主，裂缝发育段渗透率明显增高。储层主要储集空间为后期膏溶孔和溶缝，储层物性差，马五1亚段储层孔隙度和渗透率之间为简单的线性关系，马五2亚段储层孔隙度和渗透率之间关系不明显。沉积作用是储层发育的物质基础，后期白云化作用及石膏的溶解作用等建设性成岩作用有助于储集空间的形成，石英和方解石充填作用等破坏储层空间的形成，构造作用产生的微裂缝为石膏的溶解提供通道的同时也加大储集空间，沟通孤立孔隙，是后期溶蚀孔隙发育的主要因素。

Reservoir development characteristics and main controlling factors of Ma5 1+2 section in Gaoqiao-Xinghe area, Jingbian gasfield

In order to ascertain the development characteristics and main controlling factors of the Ma5 1+2 member in the Gaoqiao-Xinghe area of the Jingbian gas field, the physical properties of the reservoir were analyzed through observation of cores and thin slices and mercury intrusion experiments, combined with sedimentary, diagenetic and structural elements Analyze the controlling factors of pore space development. The results show that: Form Ma 51+2 mainly developed gypsum-dissolved pores and structural fractures with irregular shapes. The width of the roar channel is large, the primary intercrystalline pores are few developed, and the pore roar is small. The reservoir is mainly low permeability and fractures. The permeability of the developmental section is significantly increased. The main storage space of the reservoir is the late gypsum dissolution pores and dissolution fractures, and the physical properties of the reservoir are poor. The relationship between the surface degree and permeability of the Ma 51 sub-member is a simple linear relationship, while the relationship between the surface degree and the permeability of the Ma 52 sub-member is not obvious. Sedimentation is the material basis for the development of reservoirs. Constructive diagenesis such as late dolomitization and dissolution of gypsum contribute to the formation of reservoir space. The filling of quartz and calcite destroys the formation of reservoir space and the formation of tectonics. Micro-cracks provide channels for the dissolution of gypsum, while also increasing the storage space and communicating isolated pores, which are the main factors for the development of later dissolution pores.