项目名称: 基于CT扫描及数字岩心的致密油多尺度渗吸机理研究
项目编号: No.51504265
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 矿业工程
项目作者: 王庆
作者单位: 中国石油大学(北京)
项目金额: 21万元
中文摘要: 致密油藏资源潜力巨大,已成为中国非常规石油中最现实的领域之一,具有重要的开发意义;由于其低孔、低渗且天然裂缝发育,水平井体积压裂已成为其高效开发的关键技术。因此,为了取得较好的开发效果,渗吸作用就必须引起足够的重视!在这样一个缝网发育的致密油藏中进行注水开发,如果不能充分发挥渗吸作用,必然导致注入流体沿裂缝窜流,从而使基质中的原油不能被采出。项目以物理模拟技术为手段,量化表征致密储层的孔隙结构及储渗物性参数,搞清致密油藏与一般低渗超低渗油藏的不同之处;以此为基础进行基于CT扫描的静态及动态渗吸实验,研究润湿性、渗透率、边界条件、注入方式等因素对渗吸前缘动态及渗吸效率的影响,在毫米-微米尺度上分析致密油藏渗吸的机理;同时以数字岩心技术及微尺度流动格子Boltzmann方法为手段,构建三维数字岩心在纳米-亚微米尺度上分析致密油藏渗吸的机理;综合得到致密油多尺度渗吸机理。
中文关键词: 致密油;渗吸;CT扫描;数字岩心;多尺度
英文摘要: Tight oil, as a sort of unconventional hydrocarbons, is abundant in reserves, thus has great potential and is of significant importance in petroleum exploration and exploitation. Due to the characteristics of low porosity and permeability, widely existence of natural fractures, multiple-hydraulic fracturing has become the key techniques for the effective development of tight oil. oil in matrix cannot be produced due to inject water flow in fracture when the effect of imbibition is weak. In this project, we use the method of experiment to analysis structure characteristics of pore and throat and physical property parameters of formation in tight oil. We also use experiment method based on CT scan to analysis the effects of wettability and permeability to imbibition. We use digital core technology and Lattice Boltzmann Method to analysis the mechanism of imbibition in the same time. Finally, we get the multi-scale mechanism of imbibition based on CT scan and digital core technology.
英文关键词: tight oil reservoir;imbibition;ct scan;digital core technology;multi-scale