油水两相渗流压力脉动的实验及数值分析

Experiments and Numerical Analysis of Pressure Pulsation for Oil and Water Two Phase Flow in Porous Media

本文用高精度的压差传感器和高速度的数据采集设备同时测量出油水两相流体在多孔介质流动时产生的较大压力降和微小压力脉动 ,应用自行研制的大型数据处理软件对恒流速水驱油的两相渗流压力脉动实验数据进行了分析 ,发现不同阶段压力脉动具有明显的频谱特性和时间相关特性的不同 ,在第三阶段 (油为主 ,水增加阶段 )谱能增加最大 ,时间正相关程度最强 .

The pressure difference and pressure pulsation for the oil and water phase flow in porous media were measured by means of differential pressure transducers with high accuracy and data acquisition system of high speed. The test data for the pressure pulsation of the two phase flow with constant flow rate were analyzed with a software developed by the authors. It is found that the frequency apectrum characteristics and the time correlation characteristics of pressure pulsation were obviously different at flowing stages, and at the third stage (fluid is mainly oil) the spectrum energy and time correlation coefficient increased greatly.