苏里格地区盒8段流体包裹体特征及成藏期次研究

发布时间：2018-04-20 00:17

  本文选题：苏里格地区 + 盒8段　； 参考：《西南石油大学》2017年硕士论文

【摘要】：鄂尔多斯盆地作为我国重要的含油气盆地,油气资源非常丰富。本论文以中石油长庆油田分公司2014长研招号039号项目《鄂尔多斯盆地上古生界盒8流体包裹体特征及其在储层成岩研究中的应用》为依托,以鄂尔多斯盆地苏里格地区上古生界盒8段储层为研究对象,借助岩心观察、铸体薄片、常规薄片、扫描电镜、阴极发光、冷—热台、激光拉曼探针等分析化验手段,重点分析了储层流体包裹体的岩相学、均—温度及成分,并将之结合盆地热演化史和埋藏史等资料,对研究区油气藏的形成时间和成藏期次,以及成岩—成藏耦合关系做了研究和说明。研究结果表明,研究区储层发生过一系列成岩作用,经历了长时间的成岩演化,现如今处于中成岩阶段B期。其储层内砂岩颗粒的粒度、分选、磨圆等参数有其特有的属性。流体包裹体可见赋存于四种矿物类型和产状,即切穿石英颗粒及其加大边的微裂隙和石英颗粒及其加大边的微裂隙切穿石英颗粒加大边的微裂隙和石英颗粒加大边的微裂隙,切穿石英颗粒的微裂隙和石英颗粒的微裂隙,以及方解石胶结物及其微裂隙里。根据其组分特征可将其分为四种包裹体,即无机盐水包裹体、含气态烃盐水包裹体、气态烃包裹体、C02包裹体。流体包裹体的均一温度分布于60℃～230℃,主峰介于100℃～130℃。研究区包含三次包裹体捕获事件,第一次是压实作用期间,第二次是胶结(石英加大)作用期间;第三次是胶结(铁方解石胶结)作用期间。通过成岩孔隙演化,可以发现储层在石英自生加大作用之后达到致密,依托此时期捕获的流体包裹体温度,可得出储层致密时间是175-165Ma,即中侏罗世,同样地,通过流体包裹体的均一温度,可得到其油气充注时期是175-135Ma,即中侏罗世-早白垩世。因此成藏模式为在175-165Ma时期储层边致密边成藏及165-135Ma时期储层先致密后成藏;
[Abstract]:As an important oil-gas basin in China, Ordos Basin is rich in oil and gas resources. This paper is based on the project No. 039 of Changyangzhao No. 2014 of PetroChina Changqing Oilfield Branch < the characteristics of fluid inclusions in Upper Paleozoic Box 8 of Ordos Basin and its application in reservoir diagenesis study. Taking the Upper Paleozoic Ke 8 reservoir in Sulige area, Ordos Basin as the research object, with the aid of core observation, casting thin plate, conventional slice, scanning electron microscope, cathodoluminescence, cold-hot stage, laser Raman probe and other analytical and laboratory means, The lithofacies, homogenization temperature and composition of fluid inclusions in reservoir are analyzed emphatically, and combined with the data of thermal evolution history and burial history of the basin, the forming time and time of reservoir formation in the study area are analyzed. And the diagenesis-reservoir coupling relationship is studied and explained. The results show that a series of diagenesis took place in the reservoir in the study area, which has undergone a long period of diagenetic evolution and is now in the B stage of the middle diagenetic stage. The grain size, sorting, grinding and other parameters of sandstone grains in the reservoir have their unique properties. Fluid inclusions can be seen in four mineral types and occurrences, namely, microfissures that cut through quartz particles and their increasing edges, and micro-fissures that cut through the edges of quartz particles and those of quartz particles on the edges of the increasing edges of quartz particles, and micro-fissures on the sides of quartz particles. The microfractures of quartz particles and quartz particles, as well as calcite cements and microcracks are cut through. According to its composition characteristics, it can be divided into four types of inclusions, namely, inorganic salt water inclusions, gaseous hydrocarbon brine inclusions, gaseous hydrocarbon inclusions and gaseous hydrocarbon inclusions. The homogenization temperature of fluid inclusions is distributed at 60 鈩，

本文编号：1775388