两种IPR方程在渤海油区的应用与评价

在油藏工程中 ,对于评价油井产能 ,稳定试井是一个重要的工具。油井的产能测试包括确定油井的绝对无阻流量qAOF和预测油井的流入动态曲线 (IPR曲线 )。而确定qAOF和预测IPR曲线 ,可以使用多点测试和单点测试两种方法。单点测试包括Vogel(沃格 )方程和陈氏方程 ,这两种单点测试法在渤海油区的应用表明 ,对于未饱和油藏 (pR>pb) ,陈氏方程比Vogel方程更为可靠 ;但对于饱和油藏 (pR=pb) ,当无因次井底流动压力 (pD =pwf pR)大于 0 .7时 ,Vogel方程的预测结果明显偏高 ,而当pD<0 .7时 ,两者的预测结果比较接近。

The Application and Evaluation of Two IPR Equations on Bohai Oil Area

The state steady testing is an important tool for evaluating productivity of oil well in petroleum reservoir engineering.The productivity testing of oil well includes to determine absolute open flow rate and to forecast inflow performance relationship curve.However,the methods of determining absolute open flow rate and forecasting inflow performance relationship curve can be divided into the multiple-point testing and the single-point testing.At present,there are two-single-point testing in practical field.They are Vogel's equation and Chen's equation.The applications of these two single-point testing methods on Bohai oil area indicate that Chen's equation is more reliable than Vogel's equation for under saturated oil reservoir.But for saturated oil reservoir,when flowing bottom hole pressure dimensionless p_D=p_ wf /p_R<0.7,the forecasting results of Vogel's equation are obviously on the high side than Chen's equation.When p_D<0.7,the forecasting results of two single point methods are approached.