准噶尔盆地腹部地区断裂特征分析

将准噶尔盆地腹部地区断裂分为深层断裂系统（断开三叠系及以下层位）和浅层断裂系统（断开三叠系及以上层位），深层断裂系统主要形成于晚海西期，发育逆断层，易形成冲起构造；浅层断裂系统主要形成于燕山早期，发育正断层，一般形成地堑、地垒。断裂呈现多种平面展布样式，北东向和北西向断裂控制主要构造格局。断裂在剖面上呈现以正反转构造为主的叠加构造组合，在平面呈现冲起构造组合。腹部地区断裂与油气运聚配置关系良好，深层先存断裂作为油源断裂，三叠纪末形成的区域不整合面将深层断裂系统和浅层断裂系统相连接，使油气以深层断裂、不整合面为通道，运移到浅层断裂系统控制的构造圈闭中的聚集成藏。

Fault characteristic analysis for the hinterland of Junggar basin

Faults in the hinterland of Junggar basin may be divided into deep fault system and shallow fault system. Deep fault system deve loped mainly from late Hercynian movement, incising Triassic system and below strata, formed the reversed fault and thrust structure; Shallow fault system developed mainly from early Yanshan movement, forming normal fault and graben and horst. On the planes faults have all kinds of style, N E and N W faults controlled main structural framework. On the cross section faults formed the overlaid composite structures which are dominated by the positive inverted structure. Faults in the hinterland are well campatable with the migration and accumulation of oil and gas. The pre exited deep faults link to act as the oil source faults, and the regional unconformity of Triassic system, acting as transition, connected the deep faults with the shallow faults, making the deep faults, and unconformity as the pathways through which oil and gas migrated to and accumulated in the structural traps controlled by the shallow fault system.