binomial equation

Therefore, steady productivity binomial equation can be applied in gas well productivity evaluation in compound formation, in which permeability in outer zone is much higher than inner one.

通过分析证明，稳定产能方法适用于外区渗透性高于内区渗透率的复合地层中气井产能评价，而对于外区渗透性变差的气井，用稳定产能方法很难指导现场气井生产。

Based on the radial transient flow equation and the superposition principle, a corrected formula for calculating the unstabilized and stabilized binomial equation is obtained by analyzing the whole procedure of the modified isochronal test.

根据气井早期不稳定渗流理论和渗流叠加原理，对修正等时试井的全过程进行理论分析，推导出确定不稳定及稳定二项式产能方程的校正公式。

A simple method for establishing binomial deliverability equation of gas well

建立气井二项式产能方程的一种简单方法

An Easy Way to Ascertain Binomial Equation of Well Productivity

一种确定油井二项式产能方程的简单方法

Based on superposition principle, steady productivity binomial equation of gas well in compound formation is developed. Two steady productivity binomial equations and open flow rate calculations are obtained.

根据试井渗流理论中的叠加原理对复合地层中气井的稳定产能方程进行推导，得到了两个不同渗透区域的稳定产能方程和无阻流量计算公式。方程则不能得到正确的结果。

In this paper, some especial higher power equation be enumerated, just like Binomial equation or Reciprocal equation, for people cannot fine common extract roots formula about five and above power equation.

基于五次或五次以上方程没有一般通用的求根公式，本文列举了一些特殊的高次方程的解法。

RESULTS: The binomial equation of the influencing factors and the optimized formula of roxatidine sustained-release tablet were available through spherical symmetric design, and the experimental result was in line with the predicted data.

结果采用球面对称设计法，可得到影响因素的二项式方程和优化处方，且试验值与预测值非常接近。