川中磨溪-高石梯地区天然气成藏过程研究

发布时间：2018-03-16 09:34

本文选题：磨溪-高石梯　切入点：龙王庙组　出处：《西安石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：以安岳气田龙王庙组气藏为研究对象,综合运用天然气地质学、地球化学、盆地模拟等多种学科方法与技术手段,以沥青和古油藏为切入点,以成藏历史的恢复为主线,明确了其成藏过程,对深化川中古隆起下古生界天然气的成藏规律、推动发现更多的天然气储量有重要意义。研究区储层沥青分布广、种类多,大部分沥青以热演化型为主,成熟度高,沥青量与原油裂解产气量成一定的正比关系,沥青来源于来自下寒武统筇竹寺组。古油藏具有一定规模,成熟度高,多为正常油-轻质油,古油藏主要以层状分布,与现今气藏有着很好的对应关系。根据包裹体赋存的矿物、与沥青的接触关系,结合流体包裹体的均一温度,将龙王庙组储层中流体充注划分为4期:前3期形成于持续埋深阶段,在此阶段中三个温度等级代表着三期捕获,第4期形成于构造抬升阶段。根据前人研究的古油藏规模,结合包裹体均一温度区间数据、典型井的烃源岩热演化史,明确了气藏形成的四个阶段:古隆起形成阶段;古油藏大面积层状形成阶段;古油藏裂解阶段;晚期构造抬升气态烃充注阶段。
[Abstract]:Taking the Longwangmiao formation gas reservoir in Anyue gas field as the research object, comprehensive use of natural gas geology, geochemistry, basin simulation and other disciplinary methods and technical means, taking asphalt and paleoreservoir as the breakthrough point, taking the recovery of reservoir forming history as the main line, It is of great significance to deepen the law of gas accumulation in the lower Paleozoic and promote the discovery of more natural gas reserves in the middle and Paleozoic uplift of Sichuan. The reservoir asphalt in the study area is widely distributed and has many kinds, most of which are thermal evolution type. With high maturity, the amount of bitumen is proportional to the amount of gas produced by crude oil cracking, and the asphalt comes from the Qiongzhusi formation of the Lower Cambrian. The paleo-reservoir has a certain scale and high maturity, most of which are normal oil-light oil, and the paleoreservoirs are mainly stratified. According to the contact relationship between inclusions and bitumen and the homogenization temperature of fluid inclusions, The fluid filling in the reservoir of Longwangmiao formation is divided into four periods: the first three phases were formed in the stage of continuous burial depth, in which three temperature grades represented three stages of capture and the fourth stage was formed in the stage of tectonic uplift. Based on the homogeneous temperature interval data of inclusions and the thermal evolution history of hydrocarbon source rocks in typical wells, four stages of gas reservoir formation are defined: paleouplift formation stage, paleoreservoir stratiform formation stage, paleoreservoir pyrolysis stage, paleo-uplift formation stage, paleoreservoir pyrogeny stage, paleo-uplift formation stage, Late tectonic uplift gas hydrocarbon charging stage.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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