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

Abstract

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.

Key words: horizontal well, gas reservoir, non-steady state, coupling, volume source

CLC Number:

TE375

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

Figures/Tables 8

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References 18

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参数名称	参数值	参数名称	参数值
气藏长度/m	1 828.8	标准压力/MPa	0.101 3
气藏宽度/m	3 657.6	标准温度/K	293
气藏厚度/m	15.24	空气分子量	29
x方向的渗透率 /10^-3μm²	5	气体压缩因子	0.95
y方向的渗透率/10^-3μm²	5	井筒直径/m	0.1
z方向的渗透率/10^-3μm²	5	井在x方向上的位置/m	914.4
孔隙度/f	0.3	井在y方向上的趾端位置/m	2 246
气藏的初始压力/MPa	29	井在y方向上的跟端位置/m	1 316
气体黏度/（mPa·s）	0.005	井筒粗糙度/mm	0. 05
油藏温度/K	323	井在z方向上的位置/m	7.62
气体相对密度/（g·cm^-3）	0.76	最小井底压力/MPa	26.5
最大产气量/（m³·d^-1）	40 000

A non-steady state model of gas reservoir and horizontal wellbore coupling based on volume source

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