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洛伊地区三叠系沉积体系是近年来研究的重点,利用岩心、录井、测井及野外露头资料,并结合前人研究成果,对其进行分析.通过研究发现:洛伊地区三叠系沉积时期主要发育3种沉积体系类型,分别是曲流河沉积体系、三角洲沉积体系及湖泊沉积体系.中下三叠统主要发育曲流河沉积,上三叠统发育湖泊三角洲沉积,且从上三叠统沉积早期到晚期伴随着湖水面的上涨和湖盆面积的扩大.三叠系的沉积体系演化主要受控与中三叠世末印支运动的影响,印支运动造成扬子板块向华北板块俯冲,使洛伊地区周边隆起成山,并在洛伊地区形成深水湖盆.在对比洛伊地区与鄂尔多斯盆地上三叠统沉积特征及圈闭特征基础上,认为洛伊地区有较大的勘探潜力.洛伊地区沉积特征及演化规律的研究,为该地区未来的勘探提供了较为有利的地质依据.
The Triassic sedimentary system in the Loi area is the focus of recent studies, and the core data of the Triassic sedimentary system in the Loi area are analyzed by using core data, logging data, logging data and field outcrop data, and combining with previous research results. There are three types of sedimentary system mainly developed in the sedimentary period, namely, meandering river sedimentary system, deltaic sedimentary system and lacustrine sedimentary system, mainly developed meandering river sediments in the middle and lower Triassic and lacustrine delta deposition in the Upper Triassic, The early to late Triassic sediments were accompanied by the rise of lake surface and the enlargement of the lake basin.The evolution of Triassic sedimentary system was mainly controlled by the Indo-China movement at the end of Middle Triassic, Plate subduction, so that the surrounding area of the Ley area is uplifted into a mountain and a deep-water lake basin is formed in the Loi area.Based on the sedimentary characteristics and trap characteristics of the Upper Triassic in the Bayilu and Ordos basins, Exploration potential.The study of sedimentary characteristics and evolution law in the Loi area provides a more favorable geological basis for future exploration in this area.