Abstract: The development of deformed structures in shale oil reservoirs will change the physical characteristics of local rocks，resulting in flow barrier and inhibiting fluid flowing capacity，which further reduces the fracturing effect. The upper and lower sweet spots of Permian Lucaogou Formation are developed in Jimsar Sag of Junggar Basin，and contemporaneous deformation structures are widely developed in shale reservoirs. Traditional study methods are mainly based on the surface observation and the description of cores，but study on the extension mode of deformation structures in the strata and the information on adjacent strata is insufficient. In this study，a 134-meter whole shale core from a well section of Lucaogou Formation in Jimsar Sag was scanned using whole core CT to obtain its three-dimensional CT images，which were then observed for the development of deformation structure in the core，genetic type and distribution pattern. This method facilitates the identification and evaluation of geological and engineering sweet spots in shale reservoirs in the study area.

Key words: contemporaneous deformation structure, whole core CT scanning, sweet spot section, Lucaogou Formation, Jimsar Sag

摘要： 页岩油储层中变形构造的发育会改变局部岩石的物理特性，造成渗流屏障、抑制流体的渗流能力，进一步降低压裂效果。准噶尔盆地吉木萨尔凹陷二叠系芦草沟组发育上、下两个甜点段，且在页岩储层段广泛发育同生变形构造。传统研究方法主要基于岩心的表面观察和描述，对于变形构造在地层内部的延展方式、邻层情况等研究不足。采用全直径岩心CT（电子计算机断层扫描）对吉木萨尔凹陷芦草沟组某井段的134 m全直径页岩岩心进行扫描，获取全直径岩心三维CT图像，观察岩心内部变形构造发育程度、成因类型以及展布规律，对研究区页岩储层地质甜点和工程甜点的识别和评价提供帮助。

关键词: 同生变形构造, 全直径CT扫描, 甜点段, 芦草沟组, 吉木萨尔凹陷