关键词: 水驱特征曲线, 油水渗流特征, 推导, 形状, 端点, 分析, 适用性

Abstract: The 8 important water drive curves are recommended,and water saturation vs.water cut relation which show their characteristics of oil-water seepage flow were derived,so their substance for water drive characteristics understand comprehensivrly.Due to derivation is invertible,in this sense,one have already completed the derivation for all 8 important water drive curves.The Kathakov water drive curve is a general form.The Yu Qitai water drive curve 1,the Sipachev water drive curve and the Sathonov water drive curve are its particular case.Yu Qitai water drive curve 1,Sipachev water drive curve and Kathakov water drive curve at m>0 all are rational in whole process of water drive,but Kathakov water drive curve at m=0 i.e.Sathonov water drive curve can not be applied under high water cut.YU Qitai water drive curve 2 is a general form.Nathalov water drive curve,which is its particular case at m=1,can not be applied under low water cut.By Kathakov water drive curve and YU Qitai water drive curve 2,a combination of generalized water drive curve which can be applied in oil fields of two large types in Chian-water flooding bedded oil fields and bottom water drive carbonate rock oil fields has been made of.The combination of generalized water drive curve has very large theoretical sence and useful value,but judgement of users intervene obtaining parameters much in its application,so their general forms-Sipachev water drive curve and Nathalov water drive curve which obtaining parameters are easy to have very large useful value.Maksimov-Tong Xianzhang water drive curve can not be applied under much high or much low water cut,but it can describe performance of water drive very well in middle water cut,so its useful value is also very large.Attentions should be paid to its applicability of water cut boundary line,the curve type is too rare to practically use.

Key words: water drive curve, characteristics of oil-water seepage flow, derivation, shape, end point, analysis, applicability