梨树断陷小宽断裂带构造特征及演化

The structural characteristics and evolution of Xiaokuan Fracture Zone in Lishu Rift

运用三维高精度地震剖面,绘制构造演化剖面,结合前人研究成果,研究梨树断陷小宽断裂带的构造特征及其演化过程。研究结果表明,小宽断裂为一走滑断裂,对火石岭组地层沉积无控制作用,但对沙河子—泉头组地层沉积控制作用比较明显。小宽断裂自沙河子期开始发育,经历了营城期的右旋走滑作用,泉头早期的左旋走滑作用,至泉头晚期停止活动;其活动时间与生烃时间吻合,对该地区的油气运移和聚集起到了极其重要的作用。

To study the structural characteristics and evolution of Xiaokuan Fracture Zone in Lishu Rift. Seismic profile, structural evolution section are adopted. Xiaokuan fault is a strike-slip fault, it controlles the deposition style of Shahezi period-Quantou period. Xiaokuan Fault began developed in Shahezi period and stopped in the end of Quantou period, the active time of Xiaokuan Fault was same as hydrocarbon generation, which played a decisive role for the hydrocarbon migration and accumulation in this region.