井间示踪剂分析技术

根据现有示踪剂解释方法存在的问题 ,提出了描述示踪剂运移规律的半解析法的数学模型。该模型考虑了两类示踪剂的弥散、吸附滞留以及分配示踪剂滞后等特点 ,并吸收了示踪剂解析法和数值法的优点 ,将三维问题转化为一维问题。由于用解析法求解浓度不存在任何截断误差 ,且浓度的解总是位于合理解的范围内 ,故采用解析法求解产出液浓度。该方法可用于模拟任何可能的地层分布情况 ,不存在辅助算法的不稳定性等问题。利用计算机完成繁杂的解释任务 ,可以避免人为的反复调参过程。运用所建立的解释方法对开发试验区资料进行了解释 ,解释结果与取心井资料的解释结果基本一致 ,且解释结果已应用于后续的开发调整。

ANALYSIS TECHNOLOGY OF INTERWELL TRACER

According to the present problems in tracer interpretation, a new mathematical model for describing the law of tracer migration is presented. The features, such as dispersion, adsorption hysteretic of two types of tracer, are considered in the model which takes the advantages of analytical method and numerical method. On the other hand, it turnes three dimensional problems into one dimensional ones. The production concentration is obtained by analytical method which had no truncation error and rational concentration. The new method can simulate any formation distribution as possible, and has no instability of auxiliary algoriethm. Complex interpretation can be accomplished on high speed computer, which avoids artificial adjustment of complex parameters. The interpretation results of pilot test area are identical with that of coring well data.