本文選題：SAGD + 超稠油�。� 參考：《西南石油大學》2017年碩士論文

【摘要】：隨著石油資源需求量的不斷攀升和常規(guī)油氣資源量的減少,超稠油的開發(fā)利用越來越受到人們的重視。蒸汽輔助重力驅(qū)油(SAGD)作為開發(fā)超稠油的前沿技術(shù),由于其具有較高的采收率,所以SAGD在稠油開采中應(yīng)用越來越廣泛,研究適用于稠油油藏特別是超稠油油藏的開采的重力泄油技術(shù)具有十分重要的意義。本文從理論研究和數(shù)值模擬兩個方面進行蒸汽輔助重力泄油技術(shù)的研究。隨著SAGD技術(shù)的不斷發(fā)展,對SAGD產(chǎn)量預(yù)測的模型提出了更高的要求。本文對SAGD產(chǎn)量預(yù)測模型的研究現(xiàn)狀進行了調(diào)研,首先對現(xiàn)有的產(chǎn)量預(yù)測模型進行了分析和改進,并在現(xiàn)有模型的基礎(chǔ)上建立了新的曲面產(chǎn)量預(yù)測模型。①Butler產(chǎn)量模型,應(yīng)用Butler模型計算了蒸汽腔垂向階段和側(cè)向擴展階段的產(chǎn)量,并對Butler模型進行修正,繪制了產(chǎn)量曲線。②曲面模型,在線性模型的基礎(chǔ)上,考慮蒸汽腔的實際形狀為不規(guī)則的曲面。推導出了蒸汽腔側(cè)向擴展階段的產(chǎn)量,并分析滲透率和孔隙度和油藏厚度對產(chǎn)量的影響,推導出了蒸汽腔界面交界處長度的計算方法,繪制不同階段的產(chǎn)量曲線。利用數(shù)值模擬軟件CMG建立雙水平井SAGD油藏數(shù)值模型,分析蒸汽腔不同階段的擴展,得到數(shù)值模擬產(chǎn)量預(yù)測結(jié)果,通過模擬分析油藏厚度、油藏孔隙度、油藏滲透率和隔夾層不同地質(zhì)參數(shù)對SAGD的影響,油藏厚度越大,孔隙度越高,油藏滲透率越大,SAGD產(chǎn)量效果越好,小規(guī)模的隔夾層對SAGD的影響較小;優(yōu)化注入蒸汽干度、注入蒸汽速度、注入蒸汽溫度以及采注比生產(chǎn)參數(shù),優(yōu)化得到最佳注入蒸汽干度為0.8,最佳注入蒸汽速度控制在150m~3/d至200m~3/d之間,最佳采注比為1.3,蒸汽溫度相對于蒸汽干度等影響效果較小,溫度控制在240℃以上。
[Abstract]:With the increasing demand for oil resources and the decrease of conventional oil and gas resources, people pay more and more attention to the development and utilization of super heavy oil. Steam assisted gravity drive (sagd) is a frontier technology in the development of super heavy oil. Because of its high recovery efficiency, SAGD is more and more widely used in heavy oil recovery. It is of great significance to study the gravity oil releasing technology which is suitable for heavy oil reservoir, especially for super heavy oil reservoir. In this paper, steam assisted gravity oil discharge technology is studied from two aspects: theoretical research and numerical simulation. With the development of SAGD technology, higher requirements are put forward for the model of SAGD production prediction. In this paper, the research status of SAGD yield forecasting model is investigated. Firstly, the existing production forecasting model is analyzed and improved, and a new curved surface yield prediction model. The Butler model is used to calculate the output of the vertical stage and the lateral expansion stage of the steam cavity. The Butler model is modified and the yield curve and surface model is drawn. On the basis of the linear model, the output curve and surface model are drawn. Consider that the actual shape of the steam chamber is an irregular surface. This paper deduces the output in the stage of lateral expansion of steam cavity, analyzes the influence of permeability, porosity and reservoir thickness on the output, deduces the calculation method of the length of the interface of steam cavity, and draws the output curve of different stages. The numerical model of double horizontal well SAGD reservoir is established by using the numerical simulation software CMG. The expansion of steam cavity in different stages is analyzed, and the predicted result of numerical simulation production is obtained. The reservoir thickness and reservoir porosity are simulated and analyzed. The larger the reservoir thickness, the higher the porosity, the greater the reservoir permeability, the better the effect of SAGD production, the smaller the intercalation, the less the effect on SAGD, and the better the steam dryness. The optimum steam dry degree is 0.8 and the best steam injection velocity is controlled between 150m~3/d and 200m~3/d by optimizing the steam injection speed, the injection steam temperature and the production-injection ratio production parameters. The optimum injection ratio is 1.3, the effect of steam temperature relative to steam dryness is small, and the temperature is controlled above 240 鈩，

本文編號：1785094