Hele-Shaw Cell模型中粘性指进现象的研究Ⅱ.流度比和表面粗糙度对粘性指进的影响

Studies on viscous fingering Phenomenon in a hele-shaw cell model Ⅱ.Effec of mobility ratio and surface roughness on viscous fingering

前文[1]曾指出，影响粘性指进现象的因素除了与时间有关之外，还与其它参数有关。仍以排出率（Se）为目标函数，研究了油溶液和水溶液两种流体的流度比（M）、模型的玻璃表面粗糙度（ε）对粘性指进的影响。得出结论：在该条件下，M≤1时指进现象不明显，Se大；M＞1时指进现象明显，Se小。ε增大后接触角（θ）增大，润湿作用增强，因此M减少可使Se增大。这些现象对研究聚合物驱油机理，提高驱油效率有一定意义。

A previous paper has pointal out that besides time other process parameters, can also effect the viscous fingering. Keeping discharge rate (Se) as the target function, studies have been canied out on effects of the mobility rations of two kinds of fluids(petroleum solutions and aqueous ployacrylamide solutions) and sur face roughness(ε) of the model glass on the viscous fingering was not significant, when M≤1, Se were big,viscous fingering was significant when M> 1,Se were small, Increase in s caused the contact angle（θ) to increase with enhanced wetting,M decrease and Se increased. Above condusions have a significance in studiesr on polymer displacing oil and improve the efficiency of displacement.