基于区域地质背景，以岩心特征、测井资料等为依据，通过系统分析岩性特征、沉积构造及测井解释 结果，对柴达木盆地昆北油田切 16 井区路乐河组下段（Ⅰ-6—Ⅱ-2 小层）沉积相进行了研究，认为目的 层段发育冲积扇相，并进一步识别出扇根、扇中 2 个亚相及泥石流、流沟、沟间滩、辫流线、辫流砂岛及漫 流带 6 个微相。 通过编绘单井沉积相柱状图及沉积相平面展布图，揭示了沉积相纵向及平面的展布特征， 认为目的层段表现出退积式冲积扇的沉积特征，并以此为依据建立了研究区的沉积相模式，对有利微相 带展开了评价，为切 16 井区目的层进一步的勘探开发提供了理论依据。

Based on the regional geologic backgrounds, combined with core features and well logging data, this paper studied the facies of the lower Lulehe Formation in Qie 16 well block of Kunbei Oilfield by systemic analysis of the lithologic characteristics, structures and logging interpretation. The alluvial fan was developed in the target stratum, which could be further divided into two sub-facies of top-fan and middle-fan, and six microfacies of mud-rock flow, stream ditch, ditch beach, braided stream line, braided stream sand island and overflow belt. The distribution characteristics of facies were revealed by the lithologic column and plane distribution diagram of facies about single well. The target stratum shows the features of retrogradation alluvial fan. The depositional pattern was built up and the favorable microfacies belt was evaluated, which provides theory foundation for the further exploration and development in the target stratum of Qie 16 well block.