Abstract: From identified oil recovery factors and the geological and development data of 64 water drive sandstone oil fields in China most part of whose recoverable reserves are recovered,formula for estimating oil recovery factor is derived by means of multivariate stepwise regression technique.Compared with other available formulae,the new one is proved to be an empirical formula with minimum error for estimating oil recovery factor.Based on an analyses of the new formula,as discussion of the main geological and development factors that influence oil recovery factor is presented in this paper also.

摘要： 根据我国开友程度较高的64个水驱砂岩油田的标定采收率相油田地质、开发资料,由多元逐步回归方法导出了计算采收率的经验公式;经过与国内外现有的其它公式比较,表明这是目前测算我国砂岩油藏水驱采收率误差最小的经验公式;本文还通过对新公式的分析,讨论了影响水驱采收率的主要地质和开发因素。