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在对鄯勒区域地质资料、地震数据、测井及岩芯资料分析的基础上,研究了鄯勒油田沉积特征及沉积演化模式.结果表明:鄯勒地区西山窑组发育三角洲、扇三角洲和湖泊三种沉积相类型;以北部博格达山为物源的扇三角洲沉积主要发育在研究区北部的西山窑组一段,南部以觉罗塔格山为物源的三角洲沉积在西山窑组一、二段广泛发育,而湖相沉积主要分布于西山窑组三段和四段;在南北双向物源的控制下研究区主要经历了3个沉积演化阶段,即西山窑组一段南北双向混源、湖盆充填式沉积阶段,二段南部稳定的三角洲沉积阶段和三、四段深水体、广水域的扩张沉积阶段.
Based on the analysis of geologic data, seismic data, well logging and core data in Langle area, the sedimentary characteristics and sedimentary evolution model of Langle oilfield are studied.The results show that the delta, fan delta and lake Three types of sedimentary facies; the fan delta sediments originating from the northern Bogda Mountain mainly develop in the first member of the Xishanyao Formation in the north of the study area; the delta originating from the Jueluotage Mountain in the south is deposited in the first group of Xishanyao Formation, While the lacustrine deposits are mainly distributed in the third and the fourth member of the Xishanyao Formation. Under the control of the north-south biogas source, the study area mainly underwent three stages of sedimentary evolution, ie, the first-stage two-way mixed source of Xishanyao formation, Lake basin filling sedimentary stage, the second section of the southern stable delta depositional stage and the third and fourth sections of deep water bodies, wide waters of the deposition stage.