Modified isochronal well test plays an important role in productivity evaluation of gas field .

修正等时试井在气田产能评价中发挥了相当重要的作用.

In this song , each measure is isochronal , namely , four beats per measure .

这首歌每一小节都是等长的，也就是说一小节四拍。

Productivity equation serves as the basis for gas reservoir engineering calculation . To derive jingbian gasfield productivity equation , correction isochronal testing and systematic well testing are normally used at early stage of development .

产能方程是进行气藏工程计算的基础,靖边气田在求解产能方程时,前期主要采用修正等时试井、系统试井方法。