过热蒸汽吞吐水平井加热半径及产能预测模型

发布时间：2019-02-13 02:46

【摘要】：以稠油油藏为研究对象,针对过热蒸汽区加热半径及吞吐产能计算问题,通过建立过热蒸汽区瞬时能量平衡方程,运用拉氏变换及逆变换求得过热蒸汽区加热半径解析解,同时结合考虑重力的产能公式,建立了完整的加热半径及产能预测模型。研究了过热蒸汽区外边界温度对加热半径的影响、不同周期过热蒸汽区半径变化规律、重力对产能的影响以及不同生产制度下的过热蒸汽热利用率。研究表明:过热蒸汽区外边界温度增加,加热半径减小;吞吐周期增加,加热半径增加。实例中,总产油量中的重力驱出油量所占比重较大,且随着定产量的增加,过热蒸汽热利用率增加。新模型对油藏选取合理注采参数以及分析加热区热损失规律具有一定的指导意义。
[Abstract]:Taking heavy oil reservoir as the research object, aiming at the calculation of heating radius and stimulation capacity of superheated steam zone, an analytical solution of heating radius of superheated steam area is obtained by establishing instantaneous energy balance equation of superheated steam area and using Laplace transform and inverse transformation. At the same time, combined with the productivity formula considering gravity, a complete model of heating radius and productivity prediction is established. The influence of the outer boundary temperature of superheated steam zone on the heating radius, the variation law of superheated steam radius in different periods, the influence of gravity on productivity and the thermal utilization ratio of superheated steam under different production systems were studied. The results show that the outer boundary temperature of superheated steam region increases and the heating radius decreases, and the period of huff and puff increases and the heating radius increases. In an example, the proportion of gravity flooding oil in the total oil production is large, and with the increase of the fixed output, the heat utilization ratio of superheated steam increases. The new model has certain guiding significance for selecting reasonable injection-production parameters and analyzing heat loss law in heating area.
【作者单位】：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”(2011ZX05030-005-04) 中海油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”(2015-YXKJ-001)
【分类号】：TE345

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