利用压恢资料确定低孔低渗气井产能方程的方法

The Method for Productivity Equation of Low-Porosity and Low-Permeability Gas Well Confirmed by Build-up of Pressure Data

采用常规产能试井方式确定低孔低渗气井产能,其测试时间长、成本偏高。从气井渗流理论出发,对比气井不稳定二项式方程在不同时间下的不同表达式,对气井产能进行研究,提出了利用压力恢复资料确定凝析气井产能的方法。该方法降低了成本,提高了确定气井产能的工作效率和经济效益。经实例分析,证明了该方法的可靠性。

Using conventional deliverability testing way to productivity of low porosity and low permeability gas well, testing time is long and cost is high. From the filtration theory, comparing the difference expression of destabilization turbulent flow equation of gas well and studying the productivity of it, the method of by build-up of pressure data the productivity to get equation of condense gas well is suggested which rises work efficiency and benefit. Analysis of field example is proved that this method is reliable.