幂律液体在偏心环空的流动规律及其应用

FLOW LAW OF POWER LAW FLUID IN ECCENTRIC ANNULUS AND ITS APPLICATION

根据相似原理,研究了幂律液津在偏心环空作层流流动时的流动规律,并建立了有关水力参数式及流态判别式。液体在偏心环空中流动的最大特点,在于不同间隙处流速、流量的较大差异,从而引起水泥返高在不同间隙井段内也有很大的差别,影响其封固质量。文中应用该液体的流动规律及水泥浆与泥浆流变性能的相互关系,提出了保证固井注水泥时泥浆被驱替流动的基本条件和水泥浆在不同间隙处返至预定位置的方法。

In the light of similarity principle,the flow law of power law fluid doing laminar flowing in eccentric annulus is studied and the concerned hydraulic parameters and flow pattern discriminate are set up. The big discrepances of velocity and capacity of flow in different clearances make the slurry upflow to influence the quality of well cementing. By use of the flow of the fluid and the relations between the flurry and its reheological behavior,the basic conditions of making the flurry displaced and flow and the method of making the flurry in different clearances upflow to the predetermined position are presented.