基于试井的稠油注蒸汽开采周期优化研究

发布时间：2018-04-25 16:52

本文选题：稠油 + 热采　；参考：《西安石油大学》2016年硕士论文

【摘要】：稠油是我国重要的油气资源,如何高效的开发利用稠油资源,对缓解我国资源短缺现状有着重要意义。蒸汽吞吐技术是开采稠油的重要手段,合理的注采周期能够有效提高蒸汽吞吐井的产量。但国内外对确定合理注采周期的研究较少,目前的研究大多从理论角度出发,对实际情况的结合不够深入。针对以上问题,本文以新疆某稠油油田为例进行研究。首先,通过考虑注采周期中各影响因素之间的关系,应用试井拟合正演、数值试井反演以及模型中各参数敏感性分析三种方法,确定适合蒸汽吞吐井的试井模型,并运用试井拟合方法确定加热区域半径。在此基础上,修正前人加热半径公式,并根据稠油流动范围的变化,提出可流动半径概念,推导可流动半径计算公式。同时,考虑可流动半径与焖井时间、注汽量之间的关系,根据可流动半径公式推导焖井时间计算公式。运用历史生产资料分析方法,研究关键注汽参数在实际生产中的最优值,优化注汽时间。通过经济极限的方法,确定合理生产时间。根据上述各方法的综合,为蒸汽吞吐井提供了一种基于试井分析的注采周期优化方法。最后运用试井拟合出的可流动半径与优化的注汽参数进行实例计算,与多指标优化方法进行优选后的结果对比。结果表明本文方法计算时间短,计算精度满足该区实际要求,对稠油现场开采有一定指导作用。
[Abstract]:Heavy oil is an important oil and gas resource in China. How to develop and utilize heavy oil resource efficiently is of great significance to alleviate the current situation of resource shortage in China. Steam huff and puff technology is an important means of heavy oil recovery. A reasonable injection and production cycle can effectively improve the production of steam huff and puff wells. However, there are few studies on the determination of reasonable injection and production cycle at home and abroad. Most of the current studies are based on the theory, and the combination of the actual situation is not deep enough. In view of the above problems, this paper takes a heavy oil field in Xinjiang as an example. First of all, by considering the relationship between the influencing factors in the injection-production cycle, three methods of well test fitting forward modeling, numerical well test inversion and sensitivity analysis of each parameter in the model are used to determine the well test model suitable for steam stimulation well. The well-test fitting method is used to determine the radius of heating area. On this basis, the former formula of heating radius is revised, and according to the change of flow range of heavy oil, the concept of flow radius is put forward, and the formula for calculating flow radius is deduced. At the same time, considering the relationship between flowing radius and stew time and steam injection rate, the calculation formula of braised well time is deduced according to the formula of flow radius. By using the method of historical production data analysis, the optimum value of key steam injection parameters in actual production is studied, and the steam injection time is optimized. Through the economic limit method, determine the reasonable production time. According to the synthesis of the above methods, a method of injection and production cycle optimization based on well test analysis is provided for steam huff and puff wells. Finally, the flow radius and the optimized steam injection parameters are calculated by well test, and the results are compared with those obtained by multi-index optimization method. The results show that the calculation time of this method is short and the accuracy of calculation meets the practical requirements in this area, which can be used to guide the field production of heavy oil.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE345

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