百58井区地震数据高分辨率成像与断裂带构造特征

准噶尔盆地西北缘百口泉地区百58井区是一个被多条断裂切割的复杂断块区，地层倾角变化大；现有的三维地震资料成果剖面上地震波组连续性差，断裂带附近资料成像模糊，地层接触关系不清楚，很难进行精细构造解释。为获得研究区沉积盖层精细结构，在详细分析原始地震资料特点和存在问题的基础上，有针对性地采用叠前多域去噪和非线性叠前时间偏移等多种处理技术，对已有的三维地震资料进行了高分辨率精细成像处理。新的成果剖面揭示出该区百－乌断裂带发育特征、空间展布及平面组合关系。根据地层厚度、构造特征、地震反射波组特征等，划分该区地层为二叠系、三叠系、侏罗系－白垩系三大构造层，以三大构造层不同的构造特征为依据确定了研究区分为西部推覆构造带、中部断阶构造带和东部斜坡构造带3个构造单元。

High-Resolution Seismic Data Imaging and Structural Characteristics of Fault Zone in Bai-58 Well

Bai-58 well of Baiquan area on the northwestern margin of Junggar basin is a complex fault-block area cut by multiple faults with variable dip of layers and the distribution of multiple faults. The old 3D seismic data section in the Bai-58 well region show the poor continuity of seismic events, poor imaging data near the fault zone, the unclear contact relationship between strata. And it is difficult to explain fine structure. In order to obtain the fine structure of sedimentary in the study area, we use various processing technologies such as pre-stack multi-domian noise attenuation and non-linear pre-stack time migration for doing high-resolution 3D seismic reflection data on base of the analysis of the raw seismic data and problems. New results reveal the development characteristics, spatial distribution patterns and the relationship of surface composition of Bai-Wu fault. According to the section showing the strata thickness, structural feature, and characteristics of the seismic reflection wave group, the study area is divided into the three major structural layers, which are Permian, Triassic, Jurassic-Cretaceous structural layer. The different tectonic feature of the three major structural layer, is divided the study area into the western thrust belt, central fault-step zone, and eastern slope tectonic zone.