温度对西峰特低渗油藏流体渗流特征影响

针对西峰特低渗油藏由于储层压力和温度降低而导致有机垢堵塞严重的问题,在室内根据渗流力学和边界层理论,对西峰特低渗油藏不同温度下油、水两相及单相渗流特征进行了实验研究。实验结果表明:温度降低导致原油黏度升高,原油中重质组分在孔隙表面吸附量增大,流体边界层增厚,孔隙中供流体渗流空间减小;油相和水相渗流的启动压力梯度增大;油水流度比增大,油水两相区变窄,岩心润湿性由水湿向油湿转变,驱油效率明显降低,导致最终油井产能的降低。所得到的实验结果对制定与调整西峰油田生产方案具有一定的指导意义。

Influence of temperature on fluid seepage rule of Xifeng exrta-low permeability reservoir

In view of at the problem of organic scale blockage caused by the reduction of pressure and temperature at near well bore zone in Xifeng exrta-low permeability oil field,experiments of single and two phase seepage rule of different temperatures were performed indoor based on vadose and boundary layer theory,the experiment results indicats that fall of temperature causes increase of crude viscosity,increment of oil adsorbance and thickening of boundary layer which cause the vadose space of fluid decrease.The...