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奧陶系碳酸盐岩古潜山是塔里木盆地古生代的主要油气储层类型。塔中地区下奥陶统发育有三套灰岩/白云岩岩溶层,主要形成于早石炭世,单层厚几米至几十米。洞穴层的电测曲线特征表现为两高两低:低电阻和低密度,高声波时差和高自然伽玛;地震反射层表现为弱振幅、波数增多、水平反射短轴3项地震反射异常。潜山顶部古风化壳发育程度受构造条件(包括构造裂隙)、岩性、古潜水面海平面变化以及古气候等因素控制
Ordovician carbonate rock buried hill is the main oil and gas reservoir type of the Paleozoic in Tarim Basin. There are three sets of limestone / dolomite karst in Lower Tazhong area, mainly formed in Early Carboniferous, the thickness of which is several meters to tens of meters. The characteristics of electrical logging curves in the cave are two highs and two lows: low resistance and low density, high acoustic wave time difference and high natural gamma ray. The seismic reflection layer shows weak amplitude, increasing wave number and three seismic reflection anomalies of horizontal reflection short axis. The development of the ancient weathering crust at the top of the buried hill is governed by structural conditions (including structural fissures), lithology, sea level change of paleo-submersibles and paleoclimate