【摘要】：套損的預(yù)防與控制一直是國(guó)內(nèi)外各大油田致力研究與迫切想要解決的問題,套損不僅造成儲(chǔ)量可動(dòng)用程度和開發(fā)效果的下降。而且阻礙油田穩(wěn)產(chǎn)與提高采收率措施的應(yīng)用。我國(guó)每年在補(bǔ)鉆更新井和套損井的修復(fù)上投入了龐大的資金,套損嚴(yán)重阻礙了油田開發(fā)經(jīng)濟(jì)效益的提高。導(dǎo)致套管損壞的主要原因有三方面:地質(zhì)條件、工程條件和套管腐蝕。而且鋼材的質(zhì)量、防砂的方式和射孔方式等因素也可能致使套管損壞。對(duì)于稠油熱采井,致使套管發(fā)生損壞的原因更為復(fù)雜。國(guó)內(nèi)外專家在熱采井的套損機(jī)理方面做了大量的研究工作并取得了豐碩的成果,但是大多數(shù)研究均是針對(duì)單物理場(chǎng)進(jìn)行研究,而熱-流-固三場(chǎng)耦合作用下的熱采井套損機(jī)理及影響因素還有待完善。因此本文針對(duì)歡西油田系統(tǒng)的研究了熱-流-固三場(chǎng)耦合作用下熱采井套損機(jī)理及其影響因素,主要進(jìn)行了以下幾個(gè)方面的研究工作:(1)綜合固體力學(xué)、流體力學(xué)和熱力學(xué)知識(shí)得到熱采井應(yīng)力、滲流、溫度方程和邊界條件,首先建立了熱采井固-流與固-熱耦合方程,然后建立了熱采井熱-流-固三相耦合方程,并對(duì)熱采井套管的受力情況進(jìn)行了分析,為有限元模擬奠定理論基礎(chǔ);(2)利用有限元模擬仿真軟件,建立了注汽井套管-水泥環(huán)-地層有限元模型,對(duì)注汽井套管受力和變形規(guī)律進(jìn)行了模擬研究,并對(duì)比分析了注汽前后套管的有效應(yīng)力和徑向位移變化。(3)分析了注汽后套管-水泥環(huán)-地層系統(tǒng)徑向和軸向上溫度分布規(guī)律,并模擬研究了注汽濕度、注汽速度、注汽溫度和井底壓力對(duì)套管有效應(yīng)力和徑向位移的影響規(guī)律,為油田預(yù)防套損提供了理論依據(jù)。
[Abstract]:The prevention and control of casing damage is always the problem that each big oil field at home and abroad devotes to research and urgent want to solve. Casing loss not only causes the decrease of reserves availability and development effect. It also hinders the application of measures to stabilize oil production and enhance oil recovery. A huge amount of money has been invested in the repair of replacement wells and casing damaged wells in China every year. The casing damage seriously hinders the improvement of economic benefits of oilfield development. The main causes of casing damage are geological conditions, engineering conditions and casing corrosion. The quality of steel, sand control and perforation may also cause casing damage. For heavy oil thermal recovery wells, the causes of casing damage are more complicated. Experts at home and abroad have done a great deal of research on the casing damage mechanism of thermal recovery wells and achieved fruitful results, but most of the studies are focused on the single physical field. However, the casing damage mechanism and influencing factors of thermal recovery wells under thermal-fluid-solid coupling still need to be improved. Therefore, in this paper, the mechanism of casing damage and its influencing factors under thermal-fluid-solid coupling in Huanxi Oilfield system are studied. The main research work is as follows: (1) Comprehensive solid mechanics; The stress, seepage, temperature equation and boundary conditions of thermal recovery well are obtained by the knowledge of fluid mechanics and thermodynamics. At first, the solid-heat coupling equation of thermal recovery well is established, and then the thermal-fluid-solid three-phase coupling equation of thermal recovery well is established. The stress of casing in thermal recovery well is analyzed to lay a theoretical foundation for finite element simulation. (2) the finite element model of steam injection well casing cement ring and formation is established by using finite element simulation software. The stress and deformation of steam injection well casing are simulated, and the effective stress and radial displacement of casing before and after steam injection are compared and analyzed. (3) the radial and axial upward temperature distribution of casing cement ring-formation system after steam injection is analyzed. The effects of steam injection humidity, steam injection velocity, steam injection temperature and bottom hole pressure on casing effective stress and radial displacement are simulated and studied, which provides a theoretical basis for preventing casing damage.
【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】：2015
【分類號(hào)】：TE358

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李敬元，李子豐，馬興瑞，黃文虎，吳德華，，黃躍芳，芮松云;熱采井注汽管柱力學(xué)分析[J];工程力學(xué);1998年03期

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