本文選題：注采井 + 注采關系�。� 參考：《成都理工大學》2015年碩士論文

【摘要】：試井技術是油藏開發(fā)的一種重要手段,目前對于單井試井的方法和技術都比較成熟,但是對于認識多井井間影響存在著局限性。目前大部分油田的井網完善程度都很高,井間的相互影響問題越來越突出。因此研究井間的相互關系就顯得尤為重要,為此本文進行了注采井間的滲流問題研究。本文通過詳細調研前人的滲流理論及試井理論,發(fā)現(xiàn)目前的試井分析多是針對單井產量、壓力、流線等的分析研究,而通過注采比、油水粘度比、滲透率及井距等參數(shù)對多井系統(tǒng)的注采井間問題研究較少。因此建立了無限大地層單一介質一注一采不穩(wěn)定滲流模型、無限大地層雙重介質一注一采不穩(wěn)定滲流模型,運用拉氏變換的方法對所建立的模型進行求解,得到了模型的拉氏空間解。通過反演得到空間的近似解,應用疊加原理建立注采井間的壓力關系式,以注水井為中心分析討論在注采井分別提前工作的情況下,壓力方程的簡化問題尤其是冪積分函數(shù)項簡化,并用簡化的公式進行壓力特征曲線圖的繪制。分析提前工作時間、油水粘度比、注采比、彈性儲容比、生產井含水率、地層滲透率、注采井距等因素對注采井井底壓力特征影響。對注水井而言,提前注水時間越長,生產井開始生產后井底壓力越大,注水井井底壓力越大;提前注水時間一定,油水粘度比越大,注水井井底壓力越大,生產井井底壓力越小,即油相粘度大小影響驅使油流動的啟動壓力大小;生產井含水率越高,注水井井底壓力越小,生產井井底壓力越大,即含水率大小反映含油飽和度大小;產量一定,注采比越大,注水井井底壓力越大;注入量一定,注采比越大,井底壓力越大,即注采比大小反映油藏能量的虧空與補充的大小。井距越大,注水井井底壓力越大,生產井井底壓力越小;生產井提前生產時間越大,注水井和生產井井底壓力越小;彈性儲容比越大,注水井井底壓力越小,生產井井底壓力越小,即彈性儲容比的大小反映裂縫的發(fā)育程度;注采井滲透率越大,注水井井底壓力越小,生產井井底壓力越大。通過對已完成的簡化公式、單一因素分析的井底壓力特征曲線分析,認為簡化的近似解用于描述井間滲流的開始階段還存在著局限性。對于確定壓力波及到鄰井的時間以及滲流早中晚期的特征,需要從精確解著手,進行進一步研究。
[Abstract]:Well testing technology is an important means of reservoir development. At present, the methods and techniques of single well testing are relatively mature, but there are some limitations in understanding the influence of multiple wells. At present, the perfection of well pattern is very high in most oilfields, and the problem of interaction between wells is more and more prominent. Therefore, it is very important to study the interwell relationship, so the seepage problem between injection and production wells is studied in this paper. By investigating the percolation theory and well testing theory of predecessors in detail, this paper finds that the current well test analysis is mostly aimed at single well production, pressure, streamline, etc., but through injection-production ratio, oil-water viscosity ratio, etc. There is little research on the cross-well problem of multi-well system such as permeability and well spacing. In this paper, the model of unstable percolation in infinite formation with one injection and one production is established, and the model of unstable percolation with one injection and one production in infinite formation is established. The model is solved by the method of Laplace transform. The Laplace space solution of the model is obtained. By inversion, the approximate solution of the space is obtained, and the pressure relation between injection-production wells is established by using the superposition principle. Taking the injection well as the center, the paper discusses the situation that the injection-production well is working ahead of schedule, respectively. The simplified problem of pressure equation, especially the simplification of the term of power integral function, is used to draw the characteristic curve of pressure. Factors such as working time ahead of time, oil / water viscosity ratio, injection-production ratio, elastic storage / capacity ratio, production well water cut, formation permeability, injection-production interval and other factors affecting bottom hole pressure characteristics of injection-production well are analyzed. For a water injection well, the longer the injection time is, the greater the bottom hole pressure is after the production well begins production, the greater the bottom hole pressure of the injection well is, and the greater the oil / water viscosity ratio is, the greater the bottom pressure of the water injection well is. The lower the bottom hole pressure of production well, that is, the viscosity of oil phase affects the starting pressure of oil flow, the higher the water cut of production well, the smaller the bottom pressure of water injection well, the greater the bottom pressure of production well, that is, the size of water cut reflects the oil saturation. The bigger the injection-production ratio is, the greater the bottom hole pressure is, and the larger the injection-production ratio is, the greater the bottom hole pressure is, that is, the size of injection-production ratio reflects the deficit and replenishment of reservoir energy. The greater the well spacing, the greater the bottom pressure of water injection wells, the smaller the bottom pressure of production wells, the greater the production time, the smaller the bottom pressure of water injection wells and production wells, the greater the ratio of elastic storage and capacity, the smaller the bottom pressure of water injection wells. The smaller the bottom hole pressure of production well is, the greater the ratio of elastic reservoir capacity is to the development degree of fracture, and the greater the permeability of injection-production well is, the smaller the bottom pressure of water injection well is, and the greater the bottom pressure of production well is. Through the analysis of the simplified formula and the characteristic curve of bottom hole pressure by single factor analysis, it is considered that the simplified approximate solution is still limited in the initial stage of describing the seepage flow between wells. In order to determine the time of pressure spreading to adjacent wells and the characteristics of percolation in early, middle and late stages, it is necessary to further study the exact solution.
【學位授予單位】：成都理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE353

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