准噶尔盆地西北缘下二叠统佳木河组沉积-岩相特征及与油气关系

Sedimentary facies and their bearings on oil and gas accumulation in the Lower Permian Jiamuhe Formation along the northwestern margin of the Junggar Basin, Xinjiang

准噶尔盆地西北缘的下二叠统佳木河组是一个油气聚集非常丰富的地区，其沉积岩相十分复杂。佳木河组下亚组为火山火山碎屑岩体系，中、上亚组是由正常碎屑岩体系和火山火山碎屑岩体系构成的复合体系。从下到上随着火山岩的大量喷发堆积及构造活动，环中拐地区不断凸起，沉积岩相不断向东迁移。

Greater hydrocarbon potential is present in the Lower Permian Jiamuhe Formation along the northwestern margin of the Junggar Basin, Xinjiang. The formation may be subdivided into three subformations. The lower subformation consists of the volcanic volcaniclastic rock series, while the middle and upper subformations represent the compound rock series including normal clastic and volcanic volcaniclastic rock series. The volcanic eruption and tectonic activity resulted in the gradual uplift of the Zhongguai region, eastward migration of sedimentary facies, and thus the eastward migration of oil and gas accumulation.