稠油微观孔隙流动数值计算

发布时间：2018-04-27 21:14

本文选题：稠油 + 启动压力梯度　；参考：《东北石油大学》2015年硕士论文

【摘要】：本文分两部分进行稠油微观流动规律研究,一是运用物理实验的方法,选取辽河油田具有代表性的杜84区块稠油油样,分别进行稠油脱水、粘温关系测定、岩心制备、稠油启动压力梯度等实验过程,最后进行实验数据分析。通过分析渗透率、粘度等影响因素,得出渗透率变化与启动压力梯度之间的关系,根据所得数据绘制出二者之间的关系曲线,得出流量越大压力梯度越大。稠油所处的介质渗透率越低,启动压力梯度越大。测试管径尺寸越大,测得的启动压力梯度越大,测试管径长度越长,启动压力梯度越大。另一部分是分析微观孔隙内稠油流动影响因素,结合两相流模型,应用FLUENT软件进行数值模拟,得出微观孔隙内稠油的的流动情况,分别从粘度、密度、润湿角、倾角等方面考虑,分析这几种情况下稠油流动规律,以及与启动压力之间的关系,得出随着粘度、密度、润湿角等数值变化,稠油的启动压力梯度相应变化。其中模型倾角发生变化,揭示重力在稠油流动过程中与压力复合起到的作用。根据数值模拟结果,绘制出粘度、密度、润湿角与启动压力梯度间的关系曲线。上述模拟实验及数值模拟两个过程的研究,实现了计算结果与流动规律相吻合,可直观展示出微观孔隙内稠油的流动规律,并揭示重力与压力的复合作用结果,为研究微观孔隙内的流动提供依据。
[Abstract]:This paper is divided into two parts to study the micro flow law of heavy oil. One is to select the heavy oil samples of the representative du 84 block in Liaohe Oilfield by using physical experiment method, and carry out the heavy oil dehydration, viscosity and temperature relationship measurement, core preparation, respectively. Heavy oil starts the experimental process such as pressure gradient, and finally carries on the experimental data analysis. By analyzing the influence factors such as permeability and viscosity, the relationship between permeability change and starting pressure gradient is obtained. According to the obtained data, the relationship curve between them is drawn, and the bigger the flow rate is, the greater the pressure gradient is. The lower the medium permeability, the greater the starting pressure gradient. The larger the diameter of the test tube, the greater the starting pressure gradient, the longer the diameter of the test tube, the greater the starting pressure gradient. The other part is to analyze the influencing factors of heavy oil flow in micro-pore, combined with two-phase flow model, using FLUENT software to simulate the flow of heavy oil in micro-pore, respectively, from viscosity, density, wetting angle. Considering the angle of inclination, this paper analyzes the flow law of heavy oil under these conditions and the relationship between heavy oil flow and starting pressure. It is concluded that with the change of viscosity, density, wetting angle and other numerical values, the starting pressure gradient of heavy oil varies accordingly. The variation of model inclination reveals the role of gravity in heavy oil flow. According to the results of numerical simulation, the relationship curves between viscosity, density, wetting angle and starting pressure gradient are drawn. The simulation experiment and numerical simulation have realized that the calculation results are consistent with the flow law, which can show the flow law of heavy oil in micro pore directly, and reveal the compound effect of gravity and pressure. It provides a basis for the study of the flow in micro pores.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE31

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