基于体积源的气藏渗流与水平井筒流动耦合的非稳态模型

谭永胜; 李海涛; 蒋贝贝; 王永清; 张楠

doi:10.13809/j.cnki.cn32-1825/te.2018.03.006

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基于体积源的气藏渗流与水平井筒流动耦合的非稳态模型
A non-steady state model of gas reservoir and horizontal wellbore coupling based on volume source
2018年8卷第3期页码：24-29
纸质出版：2018
DOI： 10.13809/j.cnki.cn32-1825/te.2018.03.006
稿件说明：

移动端阅览

谭永胜, 李海涛, 蒋贝贝, 等. 基于体积源的气藏渗流与水平井筒流动耦合的非稳态模型[J]. 油气藏评价与开发, 2018,8(3):24-29. DOI： 10.13809/j.cnki.cn32-1825/te.2018.03.006.

Tan Yongsheng, Li Haitao, Jiang Beibei, et al. A non-steady state model of gas reservoir and horizontal wellbore coupling based on volume source[J]. Petroleum Reservoir Evaluation and Development, 2018, 8(3): 24-29. DOI： 10.13809/j.cnki.cn32-1825/te.2018.03.006.

摘要

利用体积源的思想建立了水平井和气藏耦合的非稳态模型

模型考虑了井筒内的摩擦阻力、加速度以及沿井筒流入的影响。实例计算表明

该模型的计算结果与商业数值模拟软件Eclipse的计算结果十分吻合

证明了该方法的正确性。结果表明

忽略井筒压降会过高地估计水平井产量;水平井井筒流量分布受到流入、加速度和摩擦这些因素的影响;由于井筒压降的影响

非稳态阶段的井筒流入比拟稳态时更不均匀。

Abstract

Based on the volume source

we established an unstable state model of coupling the horizontal wells to the gas reservoir

considering the friction resistance of the wellbore

the acceleration pressure loss and the influence of the wellbore inflow. It is showed that the calculation results of this model fit well with the commercial numerical simulation software--Eclipse

and has proven the correctness of this simulation method. The results show that we may overestimate the production of the horizontal wells when the wellbore pressure drop is neglected. The flow distribution of the horizontal wells is affected by the factors such as the wellbore inflow

acceleration and friction. And the influence of the gas production profile in the period of the unstable state is greater than that of the quasi-steady state.