准噶尔盆地南缘齐古背斜复杂构造模式研究

Complex Tectonic Model Research of Qigu Anticline in Southern Margin of Junggar Basin

齐古背斜位于准噶尔盆地南缘山前冲断带齐古断褶带,属南缘第一排构造。由于地表及地下地质结构复杂,地震资料品质较低,构造落实难度较大。运用综合地质建模技术,通过地面地质露头标定、钻井倾角资料及构造样式等分析,认为该背斜为深层断裂冲断、地层褶皱宽缓、中浅层被反冲断裂切割的双重构造模式。据新的构造模式重新认识齐古背斜构造成藏特征。

Qigt, anticline is located in the Qigu fault fold belt of piedmont thrust belt in southern margin of Junggar basin,belonging to the first row of the southern border tectonic.Due to the double complexity of surface and underground geological structure,the seismic data quality is more poor to do well in structure implementation.In this paper, we imple- ment a comprehensive analysis of ground geological outcrop calibration,drilling dip angle data and structural style, fol- lowed by the integrated geological modelling technology, and recognized that the Qigu anticline has the dual structure pattern of deep fault thrust,stratum fold leniency, and middle shallow layer cut by recoil fault.According to the new tectonic model to Re-recognise the accumulation characteristics of Qigu anticline.