Abstract: 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.

Key words: Junggar basin, Wuerhe-Xiazijie (Wu-Xia) area, accommodation zone, formation mechanism, hydrocarbon accumulation