低渗透髙含硫气藏硫沉积的渗流理论研究

摘要

针对低渗透高含硫气藏硫以固相析出污染地层严重影响气井产能的问题,运用渗流理论、达西、非达西流体运动方程并引进地层含硫饱和度参数,推导出气流满足达西和非达西运动条件时的含硫饱和度随时间变化的数学模型。该模型可以预测硫沉积的径向分布情况以及硫沉积量随时间变化对地层渗透率和孔隙度的影响。通过该模型的预测对此类高含硫气藏安全生产有着一定的指导作用。%In this paper,low-permeability gas reservoirs with high sulfur content of sulfur pollution by solid-phase precipitation formation seriously affect the gas capacity problems,the use of percolation theory,darcy,non-darcy fluid equations of motion and the introduction of sulfur saturation of formation parameters derived flow to meet darcy and non-darcy movement conditions,the sulfur saturation with time-varying mathematical model.The model can predict the radial distribution of sulfur deposition as well as time-varying the amount of sulfur deposited on the formation permeability and porosity effects.Predicted by the model for such high sulfur gas reservoir safety in production has an important guiding role.