试井资料早期解释的新方法

A New Method Interpreting Well Test Data at Early Times

基于Gladfelter提出的校正压力恢复曲线续流段资料的基本关系式及井筒储集阶段分析理论，建立了一种利用续流段校正进行油井压力恢复曲线早期解释的新方法。该方法应用井底恢复压力随关井时间的变化率计算关井初期的续流量。应用该方法，不但不需要实测关井后的续流量，而且续流量的计算也大大简化。该方法与Honer法相比，不仅半对数直线段出现时间大大提前，而且也使地层参数的计算精度提高。

In this paper,a new method correcting afterflow rates is presented to interpret pressure build up data from oilwells at early times. The method is based on the essential formula and theory about afterflow analysis andcorrection donated by Gadfelter. In term of the methed, calculated afterflow rates at early shut-in times canbe well obained wtth a great simplification using build up paces of pressure vs. time where there are no praticalafterflow rates to be required. To compare with Horner's method, this may not only ahead the occurrence ofsemilog straight line but also improve the analysis of formation parameters in field application.