不同经验公式预测原油采收率的精度分析

PRECISION ANALYSIS OF OIL RECOVERY FACTORS ESTIMATED BY DIFFERENT EMPIRICAL FORMULAE

在油田开发初期,利用现有的经验公式,可以简便地预测油田的原油采收率。由于各经验公式所依据的油田资料和地质背景不同,用国外公式预测我国砂岩油田的水驱采收率,其测算值的误差往往比国内公式的大10—20％。本文通过对国内外公式测算结果的精度分析,就如何运用经验公式预测我国砂岩油田的采收率提出了建议。

During early stage of oilfield development,recovery factor of a field can be estimated by empirical formulas.Each formula is derived from data based on corresponding field geologic background.Errors of recovery factors of 39 oilfields in China estimated by 4 foreign formulas are more than 10—20%,as compared with these by 3 Chinese formula.A discussion on the different empirical formula is presented and suggestions about how to use these form- ula to estimate the recovery factors of oilfields in China are offered in this paper.