关键词: 水驱特征曲线, 渗流特征, Welge方程, 油田注水开发, 储量标定

Abstract: The average water saturation and the water saturation at exit end of core are the different functions.The Welge equation was combined with above functions to derivate the most primary and the common four types of water-drive characteristic curves during oilfield development.These characteristic curves were usually applied to appraisement of water-flooding oilfield development and determination of the recoverable reserves in domestic,including Maksimov-Tong Xian-zhang water-drive characteristic curve(first curve),В.Ф.Сазонов water-drive characteristic curve(second curve),generalized Н.В.Сипачев water-drive characteristic curve(generalized third curve or А.А.Казаков curve) and generalized С.Н.Назаров water-drive characteristic curve(generalized fourth curve or Yu Qitai curve).The study provided theoretical bases for further revealing the ratio of oil and water permeability in these water characteristic curves.

Key words: water drive characteristic curve, fluid percolation characteristic, Welge equation, water flooding oilfield development, reserves determination