不停抽压力计算模型及应用探讨

An Inquiry about Non-stop Pumping Pressure Computation Model and its Application

达西定律表明，油井地层压力与井筒产液量和井底流压具有相关性。因此，从矿场生产实际出发，建立了油井生产压差与井筒产液量之间的数学模型，通过历史拟合方法，求出了地层压力与井筒产液量和井底流压之间的定量关系式。该方法可在不停抽情况下，根据油井地面生产资料随时定量分析地层压力，在油田矿场动态调配方面具有一定的参考价值。对某油田B单元8口井共49个测压点应用不停抽压力计算方法，计算结果相关性较好，平均相对误差仅1．67％。此方法可以作为重点变化单元动态分析定点测压的补充手段。

Darcy's law indicates that formation pressure of an oil well has some correlativity with wellbore fluid producing volume and bottom hole flowing pressure. Proceeded from actual conditions of field production,this paper creates a mathematical model between producing pressure drop and wellbore fluid producing volume, through historymatch approach, the quantitative relational expression between formation pressure and welibore fluid producing volume,bottom hole flowing pressure is generated. Under the condition of non-stop pumping,this method may be used to quantitatively analyse formation pressure at any time in accordance with oil well surface production data,and it has certain value of reference for field dynamic control. The non-stop pumping pressure computation method was applied to 49 pressure measuring points in 8 wells of B block in a certain oilfield,the results show a nice correlativity with only 1. 67% of average relative error. So this method may be used as a supplementary means of fixed point pressure measurements for dynamic analysis of key changeable blocks.