【摘要】 研究岩心观察、薄片鉴定、宏观地震断裂识别、微观裂缝测井解释,以及流体包裹体均一温度测温和埋藏史和孔隙度演化史.结果表明:沙雅隆起奥陶系岩溶类型从微观角度分为同生期岩溶、潜山岩溶(渗流期岩溶和潜流期岩溶)、浅埋藏岩溶及深埋藏岩溶.断裂对岩溶储层的发育起主导作用,主要体现在断裂为岩溶作用提供渗滤通道,同时断裂带是裂缝与岩溶发育的密集带.沙雅隆起加里东中期岩溶分为早幕和晚幕,晚幕岩溶表现为一期和二期,不同期次岩溶具有不同的特征.沙雅隆起下古生界顶部剥蚀面上下两段的镜质体反射率-埋藏深度关系直线之间存在明显错位的现象,说明早在石炭纪之前,沙雅隆起地区中下奥陶统有机质的演化程度已处于高成熟阶段.包裹体分析认为沙雅于奇地区奥陶系储层至少存在3次油气注入,依次为燕山晚期、喜山早期和喜山中期.受多期构造运动的影响,沙雅隆起奥陶系岩溶储层的成藏体系经历多期的建立-破坏-重建过程.更多还原

【Abstract】 Through the analysis of systematic core observation,determination of thin section,indication faults in seismic scale,interpretation of fracture of micro-scale in logging,homogeneous temperature testing of fluid inclusions,and studying of burial history and porosity evolutional history,it can be inferred that the types of reservoir of Ordovician karst in Shaya uplift can be divided into five categories,which are contemporaneous karst,burial hill karst(seepage karst and groundwater flow karst),shallow burial karst,and deep burial karst respectively.Fault plays an important role in the development of karst reservoir,the functions of which are that the filtering pathways of karstification are provided by faults and faulting zones are also the condensed sections of fractures and karst.The middle Caledonian karsts of Shaya uplift can be divided into early and late stages,the latter of which can be subdivided into epoch one and epoch two characterized by different features.The fact that there is a obvious dislocation between the up and down sections in the erosional interface of vitrinite reflectance-burial depth cross plot line in the top of the Lower Palaeozoic strata indicates that the evolutional degree of Lower-Middle Ordovician organisms in Shaya uplift has already been in the ultra-maturation stage before Carboniferous Period.The Ordovician reservoir of Yuqi area is characterized by three hydrocarbon emplacement through the analysis of fluid inclusion,which are the late stage of Yenshan movement,early stage of Himalayan movement,and middletage of Himalayan movement respectively.The system of hydrocarbon accumulation of Ordovician karst reservoir in Shaya uplift has been subjected to multiple establishing,destroying,reconstruction processes due to influence from multiple tectonic movements,the models of hydrocarbon accumulation of the studying area can be classified into gentle slope accumulation model and high point accumulation model on the basis of the relative location of source rock and differentiation of hydrocarbon migration pathways.更多还原