对Main经验方法的再扩展及应用
——对陈元千《对Main经验公式的推导、扩展和应用》的补充

Additional expansion and application to Main empirical
method:supplement for ’Inferential reasoning, expansion
and application toMain empirical formula’of Chen Yuanqian’s
thesis

王念喜；张健

Wang Nianxi Zhang Jian.

 华北分公司勘探开发研究院，河南郑州450006

(Exploration and Development Research
Institute of North China Company,SINOPEC,Zhengzhou
450006,China),

随着我国探明的低渗致密砂岩气藏类型地质储量增加和逐步开发动用，适用的气藏工程
研究方法相对较少的矛盾日益突出。为更好地开展此类气藏开采井生产动态预测和开发指标评估，基于
渗流力学的基本理论，研究了气井定产量生产条件下的井底或井口压力随时间变化的关系，以及气井流
量不稳定时的压力叠加计算方法，对Main 方法的应用范围进行了进一步扩展。按照该方法，可开展气井
产量、压力均不稳定试采条件下的生产历史拟合，生产动态预测和开发指标评估。通过在鄂尔多斯盆地
大牛地气田的实际应用，证实了此方法的可靠性，为此类气井生产动态研究和开发指标评估提供了新的
思路和方法手段。

As the OOIP of low permeability sandstone gas reservoir
increases gradually and the gas reservoir is developed,the
contradiction of few research on it is more obvious. In order to
predict the reservoir production performance and appraise the
development index,this paper studies the change of bottom-hole
and wellhead pressure vs time and pressure superimposition
computational method at unstable gas flow to expand the application
of Main method based on the transfusion mechanics theory.
According to this method,we may make a production history
matching and performance prediction and development appraisal.
Field application shows this method is reliable.