考虑吸附影响的凝析气井试井分析

凝析气井的试井解释目前基本上仍沿用干气井的单相拟压力方法，或在解释中没有考虑多孔介质对凝析油气的吸附影响,而大量实验与理论研究表明。多孔介质吸附对凝析油、气的渗流具有较大的影响。在考虑吸附影响的凝析气井渗流微分方程和压力降落试井分析的基础上。提出了考虑吸附影响的凝析气井压力恢复试井分析方法。通过实例分析表明。多孔介质吸附的影响将使试井解释有效渗透率降低表皮系数增大，气井探测半径亦将降低。对于重烃含量较高和孔隙度较低的凝析气藏。多孔介质吸附的影响程度将大得多。多孔介 质界面现象对凝析气井的渗流与试井的影响不应忽视。

Buildup Test Analysis of Condensate Gas Well Considering Adsorption Effect

n regard to present well test interpretation for gas condensate well, single phase pseudo-pressure method for dry gaswell is still be used in general, of which the effect of porous media on adsorption of condensate oil and gas is not considered.But more and more experiments and theoretical studies indicate that porous media adsorption is of greater influences on thepercolation of condensate oil and gas.This paper proposes the method for buildup test analysis of condensate gas wellconsidering adsorption effect based on differential equation of percolation with adsorption effect of condensate gas well and draw-down test analysis.Case study shows that the effect of porous media adsorption could result in decreasing effective permeability,increasing skin factor,reducing detection radius of gas well in well test interpretation. For a condensate gas reservoir with highheavy hydrocarbon content and low porosity, the influence of porous media adsorption would be much more apparent. Hence, theinfluence of porous media interfacial phenomena on the percolation and well test in a condensate gas well can not be neglected.