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本文介绍了近年来大庆油田应用非稳定流恒速法测定油水相对渗透率的实验装置，并与非稳定流恒压法进行了比较。
In this paper, an experimental device for determining the relative permeability of oil and water by using unsteady flow constant velocity method in Daqing Oilfield was introduced in this paper. The comparison was made with the unsteady flow method.