孔隙介质中滞留聚合物分子的粘弹效应系数

本文在文献1]的基础上做了进一步的试验研究,发现慢速降压过程流速对时间的依赖关系呈指数曲线形式,同时进行了慢速升压试验,同样发现流速与时间的指数关系。文中对文献1]定义的附加残余效应系数提出了修改,重新定义为滞留分子粘弹效应系数,对降压过程和升压过程的粘弹效应系数进行了对比。通过岩心出口液浓度数据,证实了文中描述的粘弹效应机理和分子构象改变的物理模型的可靠性。

VISCOELASTIC EFFECT COEFFICIENT OF THE RETAINED POLYMER MOLECULES IN POROUS MEDIA

Further experimental studies have been made on the viscoelastic effect of retained polymer molecules based on the results reported in Reference (1).The exponential correlation between velocity and time has been found in the pressure draw-down process.Pressure duildup tests have also been conducted and the same correlation has been shown. The definition of the additional residual effect factor in Reference (1) has been modified and redefined as viscoelastic effect coefficient(α)of retained polymer molecules. Comparison has been made between a for the two processes. The effluent concentration data have shown that the physical model for describing the viscoelastic effect mechanism and the comformation changes of the retained polymer molecules is reliable.