基于R-K-S方程的同心双管注多元热流体传热特征研究

发布时间：2018-11-28 07:05

【摘要】：为了解同心双管注多元热流体的传热特征,获得最优的井底蒸汽参数,基于实际气体R-K-S状态方程和质量、能量与动量守恒方程,结合经典地层内瞬态传热模型,建立了同心双管注多元热流体井筒传热数学模型。在验证模型的基础上,分析了井筒内混合汽/气典型传热特征,近井口处无接箍油管和内油管环空之间的温差较小,会导致流体热物性参数剧烈变化,但温度梯度快速趋于一致。应用该模型对非凝结气含量和注汽温度进行了优化计算,结果表明,非凝结气含量增大,井底过热度减小;随着无接箍油管注汽温度升高,井底过热度增加。研究结果表明,注汽参数对井筒内热参数分布有明显影响,现场作业时要根据井眼实际情况优选注汽参数。
[Abstract]:In order to understand the heat transfer characteristics of concentric double-tube multi-component heat fluids and obtain the optimal bottom hole steam parameters, based on the actual gas R-K-S state equation and mass, energy and momentum conservation equations, combined with the classical transient heat transfer model, A mathematical model of heat transfer in concentric double-tube multi-element heat fluid wellbore is established. Based on the verification model, the typical heat transfer characteristics of mixed steam / gas in wellbore are analyzed. The temperature difference between the tubing without coupling and the annulus of inner tubing near the wellhead is small, which will lead to drastic changes in the thermal properties of the fluid. But the temperature gradient tends to be consistent rapidly. By using this model, the uncondensed gas content and steam injection temperature are optimized and calculated. The results show that the underhole superheat decreases when the uncondensed gas content increases, and the bottom hole superheat increases with the increase of steam injection temperature of uncoupled tubing. The results show that steam injection parameters have an obvious influence on the distribution of thermal parameters in wellbore, and steam injection parameters should be selected according to the actual conditions of borehole.
【作者单位】：中国石油大学(北京)石油工程学院;油气资源与探测国家重点实验室(中国石油大学(北京));
【基金】：国家科技重大专项“西非、亚太及南美典型油气田开发关键技术研究”子课题“西非深水油田注采参数优化及单井产能预测研究”(编号:2011ZX05030-005-04)资助中国海洋石油总公司海洋石油高效开发国家重点实验室第三批开放基金课题“稠油热采流动规律主要影响因素分析”(编号:2015-YXKJ-001)部分研究内容
【分类号】：TE357.44

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