回归分析确定递减期气藏参数方法

A METHOD OF DETERMINING LOW PERMEABILITY GAS RESERVOIR PARAMETERS WITH REGRESSION TECHNIQUE

确定气藏参数的方法常常是关井测压。然而，我国有许多气藏渗透率特别低，压力恢复所需的时间特别长，有时长达几个月。因此，有必要研究根据气井生产史确定气藏参数的方法，避免关井给生产带来的损失。在 Ｆｒａｉｍ 提出的适合低渗气藏图版拟合方法基础上，用回归分析，提出了根据生产史确定低渗气藏地层参数计算公式。应用它们无需进行人为图版拟合，就可以确定气藏的储量与气层其它参数。该方法编程容易，参数确定快速准确，且实际操作无需关井，特别适合关井压力恢复需很长时间的低渗气藏。

Usually, gas reservoir parameter determination must shut down gas well. In order to avoid loss,it is necessary to study a method in the light of production decline history to determine gas reservoir parameters. On the basis of Fraim work and by using regression analysis, the paper presents a set of formula which can be used to estimate the low permeability gas reservoir parameters . The formula are easy to be programmed and able to determine gas reservoir parameters rapidly and accurately.