单点法气井产能评价中确定产能的新思路

THE NEW THOUGHT OF ASCERTAINING THE POTENTIAL DURING THE GAS WELL SINGLE-POINT POTENTIAL TEST

因为单点法产能评价的试井操作简单方便,所以深受油田欢迎,但是单点法测试时间太短,计算结果有太大的误差。针对上述问题,本文从气井渗流理论出发,在理论上进行了推导,利用单井的储层特征参数,推导计算气井达到拟稳态的时间,再利用这个时间计算气井的产能以及无阻流量。本文利用这种方法,利用M气田的单点法测试进行了校正,校正结果符合油田生产的标准要求,为以后的开采配产作业提供了可靠的依据。

Because of the simplicity and convenience, the single-point test of the gasfield is very popular. But the single-polnt deliverability test time is very short and it will result in too much errors of the calculated results. To resolve the problems mentioned above, this paper derives the formula based on gas well transient flow equation. By using reservoir characterization parameters of the single-well, deducing the time of reaching their pseudo-steady-state of gas well in theory, deliverability and open flow potential of gas well are calculated. The rectified result meets with the standard demand of the oil and gas field, provides reliable evidence for production.