川西北地区中二叠统栖霞组研究成果较多，但在沉积相特征和模式等的认识上存在较大差异，严重制约了其勘探效益。为了深化对研究区栖霞组沉积相特征的认识，提高油气勘探效益，在对9 口井的岩心描述和15 条野外剖面测量的基础上，结合测井相与地震相等资料，对其沉积相特征进行了研究，编制了栖霞组沉积早期和晚期的沉积相平面展布图，认为栖霞组主要发育开阔台地、台地边缘与前缘缓斜坡 等3 种沉积相带及6 种亚相和11 种微相。结合相对海平面变化，沉积微相、亚相和相带的展布特征及其纵、横向演化规律，建立了川西北地区栖霞组缓斜坡台地沉积演化模式，协调了碳酸盐台地模式与碳酸盐缓坡模式之间的关系。

There are many research results about the Middle Permian Qixia Formation in the northwestern Sichuan Basin, however, the great differences in the cognition of the sedimentary facies characteristics and models have seriously restricted its exploration. In order to deepen the understanding of the characteristics of sedimentary facies of Qixia Formation and improve the efficiency of hydrocarbon exploration, based on the data of core description,field profile measurement, logging and seismic data, the characteristics of sedimentary facies were studied. The maps of sedimentary facies of the early and late Qixia Formation were compiled. It is considered that Qixia Formation mainly developed three types of sedimentary facies including open platform, platform edge, foreland gentle slope,as well as six types of subfacies and 11 types of microfacies. According to the relative sea level changes, the distribution characteristics of the sedimentary microfacies, subfacies and facies and their sedimentary evolution rule, the evolution model of gentle slope platform of Qixia Formation was established, which coordinates the relationship of carbonate platform model with carbonate slop model.