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川东是天然气生产的主战场，气田（气井）类型多，整装气田多，由于近几年川东勘探有新突破，新气田也较多。对于不同气田（气井）如何进行科学、合理配产和预测，对新气田又如何在较短的试生产阶段弄清气藏（气井）产能，从而使气田早日投放正规开发，是现场技术人员考虑的主要问题，为了对气田（气井）进行科学合理配产和预测，常规做法是要进行专门的产能测试，求出产能方程。这对于新气田来说，在试采阶段既要进行不稳定试井又要

A NEW WAY TO DETERMINE CAPACITY EQUATION BY UNSTABLE TESTING

The general way for allocating and forecasting gas field (well) reasonablely and scientifically is doingspecially capacity testing to get the capacity equation. But in new gas fields, this way delays the period of productiontest. Moreover,the general capacity testing way is difficult to low permeability gas field (well) and some special wells which can't be shut off for a long term. So a new way of using unstable testing data to determin copacity equationis discussed in theory and practical application. The way is proved to be reliable and practical.