本文選題：井筒溫度　切入點(diǎn)：稠油油藏　出處：《東北石油大學(xué)》2017年碩士論文

【摘要】：隨著常規(guī)油藏儲(chǔ)量的日益枯竭,非常規(guī)油藏的高效開采已迫在眉睫,而在我國(guó)已開采的各油氣田中,還有儲(chǔ)量巨大的稠油未被有效的開采,累加起來有近二十億噸。這類油藏由于高含蠟、高熔點(diǎn),導(dǎo)致其不易于流動(dòng),大大制約了產(chǎn)出效率和產(chǎn)量,因此如何提高稠油的流動(dòng)性將是高效開采這類油藏的主要因素。深入分析稠油的物理特性,稠油的高熔點(diǎn)是引起稠油不易流動(dòng)的主要原因,如果對(duì)稠油進(jìn)行加溫,使其呈現(xiàn)出高液的狀態(tài),可以大大提高其流動(dòng)性。所以,弄清楚稠油油藏井筒內(nèi)溫度的分布規(guī)律,在此規(guī)律上使用升溫措施提高稠油的溫度,進(jìn)而使稠油更易于流動(dòng),這對(duì)高效開采稠油有著很重大的意義。本論文將對(duì)比介紹目前油田生產(chǎn)中常用的油氣舉升工藝,對(duì)比其優(yōu)缺點(diǎn)、適用性和目前油田生產(chǎn)中的使用情況,著重探討稠油油藏的各類舉升工藝的原理、所出現(xiàn)的問題和在油田中的使用條件。分析稠油油藏的特點(diǎn),深入研究油井和地層中的溫度存在狀態(tài),由熱量傳導(dǎo)的相關(guān)知識(shí),研究稠油油井中的熱存在狀態(tài),綜合考慮井筒里和地層中的熱量狀態(tài),使用多種方程相結(jié)合的方式構(gòu)建電加熱井、無輔助工藝井、摻稀井(包括油管摻稀與套管摻稀)和電潛泵井井里溫度存在情況的數(shù)學(xué)模型,對(duì)每個(gè)模型進(jìn)行求解。在構(gòu)建的模型的基礎(chǔ)上,結(jié)合大慶油田生產(chǎn)現(xiàn)場(chǎng)的實(shí)測(cè)數(shù)據(jù),制作了了井筒里溫度存在情況的曲線,同時(shí)開展了實(shí)例運(yùn)算,求解出的井口溫度和生產(chǎn)井口測(cè)量的溫度平均相對(duì)誤差在8%以內(nèi)。隨后,討論了影響機(jī)采井井里溫度存在情況的多種因素,研究結(jié)果顯示,當(dāng)井內(nèi)含水相對(duì)多的時(shí)候,井筒里的溫度慢慢上升;就電加熱井而言,加熱位置和井口之間,加熱位置離井口越遠(yuǎn),井筒里的溫度隨之下降,當(dāng)增大加熱功率時(shí),井筒里的溫度上升。就摻稀井而言,摻稀位置處溫度改變較為劇烈,當(dāng)增大摻稀量、增加摻稀位置距井口的距離,摻稀位置到井口的溫度會(huì)越高。
[Abstract]:With the increasing depletion of reserves in conventional reservoirs, the efficient production of unconventional reservoirs is imminent, and in the various oil and gas fields that have been exploited in China, there are still huge reserves of heavy oil that have not been effectively exploited. This kind of reservoir is difficult to flow because of its high wax content and high melting point, which greatly restricts the production efficiency and output. Therefore, how to improve the fluidity of heavy oil will be the main factor for high efficiency exploitation of this kind of reservoir. After analyzing the physical characteristics of heavy oil, the high melting point of heavy oil is the main reason for the difficult flow of heavy oil. If the heavy oil is heated, It can greatly improve the fluidity of heavy oil reservoir by making it appear high liquid state. Therefore, the distribution law of wellbore temperature in heavy oil reservoir is clarified, and the temperature of heavy oil is raised by means of heating measures in this rule, which makes heavy oil flow more easily. This will be of great significance to the efficient production of heavy oil. This paper will compare and introduce the oil and gas lifting technology commonly used in oil field production, compare its advantages and disadvantages, its applicability and the current situation of oil field production. The principle, problems and application conditions of various lifting processes in heavy oil reservoirs are emphatically discussed. The characteristics of heavy oil reservoirs are analyzed, and the existing state of temperature in oil wells and formations is deeply studied, and the relevant knowledge of heat conduction is studied. The heat existing state in heavy oil well is studied. Considering the heat state in wellbore and formation, electric heating well is constructed by combining many kinds of equations, and there is no auxiliary technology well. The mathematical models of the temperature in well with dilute (including tubing and casing) and electric submersible pump are solved. On the basis of the established model, combined with the measured data of Daqing oil field, The curves of the existence of wellbore temperature are made, and an example operation is carried out. The average relative error between the calculated wellhead temperature and the measured temperature of production wellhead is less than 8%. This paper discusses several factors that influence the existence of temperature in mechanically produced wells. The results show that when the water in the well is relatively high, the temperature in the wellbore rises slowly and, in the case of electric heating wells, the heating position is between the heating position and the wellhead. The farther away the heating position is from the wellhead, the lower the wellbore temperature will be. When the heating power is increased, the temperature in the wellbore will rise. Increasing the distance from the dilute position to the wellhead, the temperature from the dilute position to the wellhead will be higher.
【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)】：TE345
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本文編號(hào)：1693501