In order to verify whether the length of the liquid droplet entering the well under the on-site reinjection pipe flushing process meets the purpose of well flushing,a force analysis was conducted on the circulating well flushing liquid droplet.It was found that when the gravity of the liquid droplet is equal to the sum of the gas's buoyancy and drag force,the velocity at which the liquid droplet settles to the bottom of the well is the minimum velocity;By substituting it into the Bernoulli equation,the minimum length of the reinjection tube can be calculated;By comparing the calculated results with the actual length of the reinjection pipe,it was found that the 11 wells that currently require the reinjection pipe flushing process can all settle to the bottom of the well,achieving the purpose of well flushing.This formula can provide theoretical support for the well flushing process of the reinjection pipe and correctly guide the later on-site application.
关键词
延川南煤层气田/回注管洗井工艺/长度计算/应用效果
Key words
Yanchuan South Coalbed Gas Field/Reinjection pipe flushing process/Length calculation/Application effect
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