气藏水平井水平段压力分布研究

根据气藏内气体的流动模型和水平井井简内流体的流动模型,建立了耦合模型,通过该耦合模型对气藏中的水平井井简内单相流动特性进行了数值计算研究。由于所用气藏模型压力分布较为复杂,使得水平井的流动计算变得相当复杂,应用表征流动特性的非线性方程对空间进行迭代计算,再向时间推进。通过编制实用计算程序计算气藏水平井压力分布,为水平井的设计开采提供一定 的依据。

Pressure Distribution of Horizontal Section of Horizontal Drilling in Gas Reservoir

Based on the gas flow model in gas reservoir and the fluid flow model in horizontal well,a couple model is developed and used for numerical computing study of single flow performance in horizontal borehole.The complex pressure distribution in the model makes the fluid flow computation of horizontal well be fairly complicated,so the non-linear equation describing fluid flow performance has been applied for space iterative computation followed by time iterative computation.This paper provides applicable computation procedure to calculate the pressure distribution of horizontal well in gas reservoir,and could be as a guide for design and production of horizontal wells.