【摘要】：在石油行業(yè)中,注蒸汽熱采稠油油藏是一項復(fù)雜并且難度大的工程。這一過程中,油藏條件會隨時間和空間不斷變化,它涵蓋了滲流力學(xué)、采油工程、傳質(zhì)傳熱學(xué)、巖石力學(xué)等多門學(xué)科。因此要從油藏實際情況出發(fā),研究注蒸汽熱采稠油的全過程,才能夠合理、經(jīng)濟的注汽采油。本文進行了如下研究： 1、分析了蒸汽在井筒中的運動規(guī)律及傳熱過程,給出了計算井筒中壓力和干度分布的迭代算法,并對井筒進行了熱敏感性分析。 2、針對注汽熱采稠油油藏引發(fā)多孔介質(zhì)應(yīng)力、孔隙流體壓力和溫度變化的耦合問題,根據(jù)滲流力學(xué)、傳質(zhì)傳熱學(xué)和巖石力學(xué)理論,建立了單相飽和流體的熱-流-變形耦合數(shù)學(xué)模型。 3、在耦合模型建立的基礎(chǔ)上,對五點井網(wǎng)注汽驅(qū)油模式,采用COMSOL軟件進行數(shù)值模擬和對比分析。研究內(nèi)容如下：孔隙度和滲透率對溫度傳播的影響；不同的注汽溫度對巖石變形的影響；注汽時間對巖石骨架變形、溫度和壓力波及范圍的影響。計算結(jié)果顯示：巖石物性參數(shù)對溫度的傳播影響顯著；高溫會引起巖石骨架膨脹,導(dǎo)致巖石顆粒發(fā)生位移,甚至巖層的破裂；注汽時間對變形、溫度及壓力也存在較大影響。通過對比分析,更進一步說明了熱-流-變形耦合模型在熱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.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE345

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