准噶尔盆地乌夏地区构造调节带特征及成因

Characteristics and Origin of Structural Accommodation Zone in Wu-Xia Area, Junggar Basin

构造调节带的有关问题在我国东部伸展盆地中研究较多,而在西部挤压盆地中研究相对较少。通过研究,把准噶尔盆地乌夏地区调节带分为3种类型:同向接近型、同向叠覆型和同向共线型。同向接近型调节带主要分布在夏子街地区,同向叠覆型调节带分布在乌尔禾地区,同向共线型调节带分布在乌尔禾、乌夏及夏红3个区块的过渡带。由于调节带控制砂体展布,而紧邻的断层又可作为油气运移的通道,因此调节带是油气运聚的有利场所。研究指出,百乌断裂和乌南断裂之间、夏59井断裂和夏红南断裂之间以及乌尔禾断裂带和乌夏断裂带、乌夏断裂带和夏红断裂带之间的调节带,是该区形成油气藏的有利地区。

Structural accommodation zones are usually studied in extensional basins in eastern China, but less studied in compressional basins in western China. In this paper, the accommodation zone in Wu-Xia area in Junggar basin is divided into three types such as synthetic approaching type found in Xiazijie area, synthetic overlapping type in Wuerhe area and synthetic collinear type in transitional zones of Wuerhe, Wu-Xia and Xia-Hong areas. The sand distribution could be controlled by accommodation zone, and its adjacent faults may serve as channels for oil-gas migration, so the accommodation zone is a favorable place for oil-gas migration and accumulation. The study shows that the accommodation zones between Baiwu fault and Wunan fault, Xia-59 Well fault and Xiahongnan fault, Wuerhe fault and Wu-Xia fault, as well as between Wu-Xia fault and Xiahong fault should be favorable areas for forming oil-gas reservoirs.