稠油油藏渗流

发布时间：2018-03-14 07:34

本文选题：稠油油藏　切入点：三场全耦合　出处：《东北石油大学》2016年硕士论文　论文类型：学位论文

【摘要】：我国稠油资源丰富,稠油资源在各主要油田都得到了有效的开发利用,纵观各油田的稠油开采,大多数还是以热采为主要开采方式。高温蒸汽、热水的注入,剧烈地改变油层的温度系统,也改变油层和流体的其他物性。稠油热采过程中温度的剧烈变化对岩层骨架和流体的影响不能被忽视,油藏将处于渗流场、变形场、温度场三场耦合作用状态。为了搞清三场耦合作用下的地层情况,本文通过一系列物理试验研究温度对岩石强度特性(抗压强度特性和抗剪强度特性)、岩石变形特性、孔隙度、渗透率的影响以及温度对地层流体物性的影响。通过单轴、三轴压缩试验测定不同温度下的岩心物性参数,运用同轴圆筒旋转流变仪测定流体粘度随温度的变化,应用岩石压缩系数仪和岩心流动试验仪测定温度和有效应力对岩石孔隙度、渗透率的影响。在物理试验的基础上,建立流体和固体参数的状态方程,依据质量守恒定律、能量守恒定律,结合温度影响下的岩石应力-应变关系、流体运动方程等建立稠油油藏三场耦合数学模型(包括应力场控制方程、渗流场控制方程、温度场控制方程、定解条件和初始条件),模型为全耦合数学模型,各场控制方程中都有其他两场的体现。通过三场耦合数学模型有效性验证之后,本文以数值模拟方法为手段,深入探讨三场耦合的规律。通过改变流体的注入温度、注入压力、地层渗透率来观察三场的分布,分析温度场、应力场、质点位移、孔隙压力的变化,研究三场之间的相互作用。本文对比了三场耦合和流固耦合两种生产条件(实质是考虑温度的影响和不考虑温度的影响),预测各生产条件下的生产指标,分析温度场对于稠油开采的利弊,为现场工程问题提供理论基础。
[Abstract]:Our country is rich in heavy oil resources, heavy oil resources have been effectively developed and utilized in all major oil fields. Throughout the production of heavy oil in various oilfields, most of them are mainly produced by thermal recovery, high temperature steam and hot water injection. The temperature system of reservoir and other physical properties of reservoir and fluid are changed dramatically. The influence of temperature on rock skeleton and fluid can not be ignored during thermal recovery of heavy oil, and the reservoir will be in seepage field and deformation field. In order to find out the formation situation under the coupling of three fields, a series of physical experiments were conducted to study the relationship between temperature and rock strength (compressive strength and shear strength, deformation, porosity). The influence of permeability and temperature on the physical properties of formation fluid. The physical properties of cores at different temperatures were measured by uniaxial and triaxial compression tests, and the variation of fluid viscosity with temperature was measured by means of coaxial cylinder rotary rheometer. The influence of temperature and effective stress on the porosity and permeability of rock was measured by rock compressibility coefficient meter and core flow tester. Based on the physical test, the state equations of fluid and solid parameters were established, and the law of conservation of mass was used to determine the effect of temperature and effective stress on the porosity and permeability of rock. The law of conservation of energy, the stress-strain relation of rock under the influence of temperature, the equation of fluid motion and so on, are used to establish the coupled mathematical model of three fields in heavy oil reservoir (including stress field control equation, seepage field control equation, temperature field control equation, etc.). The model is a fully coupled mathematical model, and there are two other fields in each field control equation. After the validity of the three-field coupled mathematical model is verified, the numerical simulation method is used in this paper. By changing the injection temperature, injection pressure and formation permeability of the fluid, the distribution of the three fields is observed, and the changes of temperature field, stress field, particle displacement, pore pressure are analyzed. The interaction between the three fields is studied. In this paper, we compare the three field coupling and fluid-solid coupling conditions (in essence, considering the effect of temperature and not considering the effect of temperature), and predict the production indexes under different production conditions. The advantages and disadvantages of temperature field for heavy oil recovery are analyzed, which provides a theoretical basis for field engineering.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE345

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