调查半径与地层损害表皮系数的关系

THE RELATION BETWEEN RADIUS OF INVESTIGATION AND FORMATION DAMAGE

调查半径与地层损害的程度及范围有关 ,文中得到了地层受到损害时的调查半径。井底附近地层渗透率降低程度、范围愈大 ,则调查半径愈小 ;地层损害表皮系数愈大 ,则调查半径愈小。井底附近地层渗透率降低比改善对调查半径的影响要大。当地层受到严重损害时 ,应考虑地层损害表皮系数或渗透率降低对调查半径的影响。

The radius of investigation for formation damage has been formulated in this paper.The radius of investigation depends on the extent and scope of formation damage.If the degree and scope of the formation permeability decreased is more,its radius of investigation is less.If skin factor of formation damage is more,its radius of investigation is less.When the formation damage is very serious,the effect of the skin factor for formation damage or permeability decreased on radius of investigation should be considered.