基于热—流—变形耦合模型的稠油热采数值模拟研究
发布时间：2018-07-30 06:39
【摘要】：在石油行业中,注蒸汽热采稠油油藏是一项复杂并且难度大的工程。这一过程中,油藏条件会随时间和空间不断变化,它涵盖了渗流力学、采油工程、传质传热学、岩石力学等多门学科。因此要从油藏实际情况出发,研究注蒸汽热采稠油的全过程,才能够合理、经济的注汽采油。本文进行了如下研究： 1、分析了蒸汽在井筒中的运动规律及传热过程,给出了计算井筒中压力和干度分布的迭代算法,并对井筒进行了热敏感性分析。 2、针对注汽热采稠油油藏引发多孔介质应力、孔隙流体压力和温度变化的耦合问题,根据渗流力学、传质传热学和岩石力学理论,建立了单相饱和流体的热-流-变形耦合数学模型。 3、在耦合模型建立的基础上,对五点井网注汽驱油模式,采用COMSOL软件进行数值模拟和对比分析。研究内容如下：孔隙度和渗透率对温度传播的影响；不同的注汽温度对岩石变形的影响；注汽时间对岩石骨架变形、温度和压力波及范围的影响。计算结果显示：岩石物性参数对温度的传播影响显著；高温会引起岩石骨架膨胀,导致岩石颗粒发生位移,甚至岩层的破裂；注汽时间对变形、温度及压力也存在较大影响。通过对比分析,更进一步说明了热-流-变形耦合模型在热采稠油油藏研究中的重要性。
[Abstract]:In petroleum industry, steam injection thermal recovery heavy oil reservoir is a complex and difficult project. In this process, reservoir conditions change with time and space. They cover many subjects, such as seepage mechanics, oil production engineering, mass transfer and heat transfer, rock mechanics and so on. Therefore, it is necessary to study the whole process of steam injection thermal recovery of heavy oil in order to reasonable and economical steam injection production. In this paper, the following studies are carried out: 1. The movement and heat transfer process of steam in wellbore are analyzed, and an iterative algorithm for calculating the distribution of pressure and dryness in wellbore is given. The thermal sensitivity of wellbore is analyzed. 2. According to the theory of seepage mechanics, mass transfer heat transfer and rock mechanics, the coupling problem of stress, pore fluid pressure and temperature change caused by steam injection heat recovery heavy oil reservoir is discussed. The thermal-fluid-deformation coupling mathematical model of single-phase saturated fluid is established. 3. On the basis of the coupled model, the steam flooding model of five-spot well pattern is simulated and contrasted with COMSOL software. The main contents are as follows: the effect of porosity and permeability on temperature propagation; the influence of different steam injection temperature on rock deformation; and the influence of steam injection time on rock skeleton deformation, temperature and pressure sweep range. The results show that the physical parameters of rock have a significant effect on the propagation of temperature; the high temperature will cause the rock skeleton to expand and lead to the displacement of rock particles and even the fracture of rock layer; the steam injection time also has a great effect on deformation temperature and pressure. The importance of thermal-fluid-deformation coupling model in the study of thermal recovery heavy oil reservoirs is further illustrated by comparative analysis.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE345
本文编号：2154153
[Abstract]:In petroleum industry, steam injection thermal recovery heavy oil reservoir is a complex and difficult project. In this process, reservoir conditions change with time and space. They cover many subjects, such as seepage mechanics, oil production engineering, mass transfer and heat transfer, rock mechanics and so on. Therefore, it is necessary to study the whole process of steam injection thermal recovery of heavy oil in order to reasonable and economical steam injection production. In this paper, the following studies are carried out: 1. The movement and heat transfer process of steam in wellbore are analyzed, and an iterative algorithm for calculating the distribution of pressure and dryness in wellbore is given. The thermal sensitivity of wellbore is analyzed. 2. According to the theory of seepage mechanics, mass transfer heat transfer and rock mechanics, the coupling problem of stress, pore fluid pressure and temperature change caused by steam injection heat recovery heavy oil reservoir is discussed. The thermal-fluid-deformation coupling mathematical model of single-phase saturated fluid is established. 3. On the basis of the coupled model, the steam flooding model of five-spot well pattern is simulated and contrasted with COMSOL software. The main contents are as follows: the effect of porosity and permeability on temperature propagation; the influence of different steam injection temperature on rock deformation; and the influence of steam injection time on rock skeleton deformation, temperature and pressure sweep range. The results show that the physical parameters of rock have a significant effect on the propagation of temperature; the high temperature will cause the rock skeleton to expand and lead to the displacement of rock particles and even the fracture of rock layer; the steam injection time also has a great effect on deformation temperature and pressure. The importance of thermal-fluid-deformation coupling model in the study of thermal recovery heavy oil reservoirs is further illustrated by comparative analysis.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE345
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