关键词: 高含水期, 压力结构差异, 井底流压, 压力系数比, 注水量劈分

Abstract: Abstract：As a result of long-term water injection development and interlayer heterogeneity，reservoir at high water cut period
has serious interlayer pressure textural differences，a knowledge of which is the important basis of rational adjustment. In view
of the lack of testing pressure data of well site，and the difficulty in single pressure data acquisition，a quantitative mathematical
model of the high water-cut period stratum interlayer pressure textural difference was established with the percolation mechanics
principle. The key parameters of the model can be obtained by production data. The example in Zaoyuan Oilfield showed that：
high water cut reservoir interlayer pressure is obviously different. The method can determine the pressure differences of each
layer. And calculating results is close to the testing data. It is helpful for recognizing the development contradiction，and for
providing the technical basis for reasonable adjustment.

Key words: high water cut period, pressure textural difference, bottom hole flowing pressure, pressure coefficient ratio, waterinjection split