本文關(guān)鍵詞： 套管損壞 壓力平衡 注采平衡 拉伸 形變　出處：《東北石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：油水井套管損壞給油田的正常生產(chǎn)帶來很大的危害,不僅造成經(jīng)濟(jì)損失,而且影響開發(fā)效果。大慶油田采油一、二、四、六廠曾經(jīng)發(fā)生過成片套損,控制套損速度已經(jīng)成為油田開發(fā)工作的重點(diǎn)內(nèi)容之一,大慶油田套損機(jī)理研究工作從未間斷,已經(jīng)取得了一定成果。但是,機(jī)理研究仍然存在局限性和獨(dú)立性,且大多是定性的研究,研究成果推廣應(yīng)用范圍受到一定限制,致使套管保護(hù)工作還處于被動(dòng)狀態(tài)。為此,開發(fā)套損防控預(yù)警系統(tǒng)軟件,為套損預(yù)測(cè)和防治提供理論依據(jù)。本文為搞清該區(qū)塊的地下動(dòng)態(tài)變化與套損的關(guān)系,從地應(yīng)力及方位監(jiān)測(cè),大地三維形變監(jiān)測(cè)等入手,研究區(qū)塊套損成因,提出控制套損速度的有效辦法。確定嫩二段套損防護(hù)技術(shù)界限,并采取有針對(duì)性的防控措施,減緩套損速度。本文為監(jiān)測(cè)地層動(dòng)態(tài)變化對(duì)套損的影響,大慶油田在南二區(qū)西部建立了大地三維形變監(jiān)測(cè)網(wǎng)研究套損試驗(yàn)區(qū)。南二區(qū)西部地層在開發(fā)過程中進(jìn)行了15年的三維形變長期監(jiān)測(cè),通過監(jiān)測(cè)得出了油田開發(fā)中大地三維形變的基本規(guī)律。監(jiān)測(cè)結(jié)果表明:高壓注采可以造成地面高程的變化,并且這種形變與同期地層壓力變化趨勢(shì)較為一致。斷層較少的地層垂向位移量與地層壓力變化的相關(guān)性較好,而在斷層、斷塊多的地方符合程度相對(duì)較差。根據(jù)測(cè)量結(jié)果確定了防止套損的技術(shù)界限,為油田生產(chǎn)、套管保護(hù)提供理論指導(dǎo)。最后從多孔彈性理論對(duì)測(cè)量結(jié)果進(jìn)行了解釋,給出了開發(fā)過程中大地三維形變計(jì)算的數(shù)學(xué)模型。
[Abstract]:Casing damage in oil and water wells causes great harm to the normal production of oil fields, not only causing economic losses, but also affecting the development effect. Controlling casing damage rate has become one of the key contents of oilfield development, and the research work of casing damage mechanism in Daqing Oilfield has never stopped, and some achievements have been made. However, the mechanism study still has its limitations and independence. Most of them are qualitative research, and the scope of application of the research results is limited, so the casing protection work is still in a passive state. Therefore, the software of casing damage prevention and control early warning system is developed. In order to find out the relation between the dynamic change of underground and the casing damage, this paper studies the cause of casing damage from the monitoring of ground stress and azimuth, the monitoring of three dimensional deformation of the earth and so on, in order to find out the relationship between the dynamic change of underground and casing damage of the block. An effective method for controlling casing damage velocity is put forward. The technical limits of casing damage protection in Nen2 are determined, and corresponding measures are taken to slow down casing damage. In order to monitor the influence of dynamic change of formation on casing damage, In Daqing Oilfield, a three-dimensional deformation monitoring network has been established in the western part of South China, where the long-term monitoring of 3D deformation has been carried out for 15 years in the course of development. Through monitoring, the basic law of 3D deformation in oilfield development is obtained. The monitoring results show that high pressure injection and production can cause the change of surface elevation. And this kind of deformation is consistent with the change trend of formation pressure in the same period. The vertical displacement of formation with less fault has a better correlation with the variation of formation pressure, but in the fault, According to the measurement results, the technical limit of preventing casing damage is determined, which provides theoretical guidance for oil field production and casing protection. Finally, the measurement results are explained from the theory of porous elasticity. A mathematical model for the calculation of three-dimensional deformation of the earth during the development process is presented.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE931.2
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本文編號(hào)：1551629