二氧化碳驱油技术研究.docVIP

摘 要 通过对芳48注气驱油试验区的原油及注入气的高压物性试验，掌握试验区原油及注入气的物性，油藏烃类的组成的基础上，通过大量实验现象和数据，分析了气驱油原理，通过岩心驱油实验确定了特低渗透油藏气驱油，水驱油渗流规律和油气，油水相对渗透率曲线通过长岩心实验得出了气驱，吞吐，水驱转气驱等不同注气方式的驱油效率和注入能力；研究了注气机理及影响气驱效果的因素，掌握了特低渗透率油藏的开发特点及采油生产规律。 研究表明，对于像芳48试验区这样的特低渗透率油藏，因地层油相对密度较高，油中含轻组分和中间组分较少，注CO2能实现混相驱油。可以通过注CO2驱油提高油藏的采收率并通过合理的设计和精细的经济预算，便可以取得较好的经济效益。 关键词：注气开发；特低渗透油藏；二氧化碳 Abstract According to the crude oil and injection gas’s high pressure physics experiment in Fang 48 pilot,we know the crane oil and injection gas’s physics.On the Reservoir hydrocanbon’s base,a lot of experiment phenomenon and data, has analyzed when the gas oil displacement in the oil layer, it appears gas oil displacement principle, through the core sample drove oil experiment to determine the especially low seepage oil reservoir gas displacement oil ,water-oil displacement transfusion rule and oil gas and oil –water relative permeability curve. through the long core sample experiment, It can reach a conclusion which contains the different gas injection way of water driven, injection gas and so on of oil efficiency and the injectivity ; Has studied the gas injection mechanism and the factor of influence gas driven effect, has grasped the special low permeability oil reservoir development characteristic and the production rule. The research indicated that regarding to the Fang 48 pilot areas which is such special low permeability oil reservoir, Because the initial oil in place relative density is high, in the oil the light component and among the component are few,CO2 injection can realize the miscible displacement oil. May through CO2 injection to drive oil to enhance the recovery of the oil reservoir and through the reasonable design and the fine economical budget, then may obtain the good economic efficiency. Key words: Gas injection development；Especially low permeability oil reservoir 目 录 第1章 概 述 1 第2章 低渗透油藏注气开发实践调研总结 4 2.1 国外低渗透油田注气开发的研究与实践[3] 4 2.2 国内低渗透油田注气开发的研究与应用现状[4] 5 2.3注气驱油方式 6 第3章 注气采油机理 10 3.1 二氧化碳驱油 10 3.2 气水交替注入驱油机理