当前位置: X-MOL 学术Int. J. Eng. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
On the application of simplified rheological models of fluid in the hydraulic fracture problems
International Journal of Engineering Science ( IF 6.6 ) Pub Date : 2020-03-19 , DOI: 10.1016/j.ijengsci.2020.103275
Michal Wrobel

In this paper a problem of a hydraulic fracture driven by a non-Newtonian shear-thinning fluid is analysed. For the PKN fracture geometry three different rheological models of fluid are considered: (i) the Carreau fluid, (ii) the truncated power-law fluid, (iii) the power-law fluid. For each of these models a number of simulations are performed. The results are post-processed and compared with each other in order to find decisive factors for similarities/dissimilarities. It is shown that under certain conditions even the basic power-law rheology can be a good substitute for the Carreau characteristics. Although for a particular fluid such a conclusion cannot be made a priori, post-processing based on average values of the fluid shear rates is a very good tool to verify credibility of the results obtained for simplified rheological models. The truncated power-law rheology is a good alternative for the Carreau model. It always produces results that are very similar to those obtained with the equivalent Carreau fluid and simultaneously provides a relative ease of numerical implementation.



中文翻译:

简化流体流变模型在水力压裂问题中的应用

本文分析了非牛顿剪切稀化液驱动的水力压裂问题。对于PKN断裂几何形状,考虑了三种不同的流体流变模型:(i)Carreau流体,(ii)截断幂律流体,(iii)幂律流体。对于这些模型中的每一个,都执行了许多模拟。将结果进行后处理并相互比较,以找到相似性/不相似性的决定性因素。结果表明,在某些条件下,甚至基本的幂律流变学也可以很好地替代Carreau特性。尽管对于特定的流体,不能事先得出这样的结论,但是基于流体剪切速率平均值的后处理是一个非常好的工具,可以验证简化流变模型所获得结果的可信度。截断的幂律流变学是Carreau模型的一个很好的选择。它总是产生与使用等效Carreau流体获得的结果非常相似的结果,并且同时提供了相对容易的数字实现方式。

更新日期:2020-03-19
down
wechat
bug