三塘湖盆地马朗凹陷二叠系芦草沟组裂缝性储层特征与油气产能关系

根据岩心、铸体薄片观察及测井、试井资料等,研究了新疆三塘湖盆地马朗凹陷二叠系芦草沟组储层裂缝类型及特征,分析了控制裂缝产生和发育的地质因素,主要为构造应力、岩石类型、岩石厚度及匹配关系.详细分析了不同构造区裂缝的发育程度和裂缝类型,得出本研究区储层为裂缝-孔隙型,裂缝起着渗流通道和储集空间的双重作用.而碳酸盐岩厚度、裂缝类型配置、基质与裂缝的渗透率关系控制了油气产能高低.

Relationship between oil-production capacity and fracture reservoir characterization of the Permian Lucaogou Formation in the Malang depression, Santanghu basin, Xinjiang, China

According to the observations of cores and cast thin sections as well as the data of testing well and well logging, this paper studies the fracture types and characterization of the Permian reservoir in the Malang depression in the Santanghu basin of Xinjiang, and analyses the geological factors controlling the generation and development of the fractures. These factors contain the tectonic stress, the rock type and thickness, and the fracture matching relation. Based on the developing degree and types of fractures in various tectonic areas, the paper concludes that the studied reservoir is characterized by fracture-pore. In addition, the fractures act as seepage channels and reservoir spaces. Moreover, the oil-production capacity is controlled by the thickness of the carbonate rock, the matching relation of fracture types and the relation between matrix and permeability of fractures.