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

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