Topic
Herschel–Bulkley fluid
About: Herschel–Bulkley fluid is a research topic. Over the lifetime, 1946 publications have been published within this topic receiving 49318 citations.
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TL;DR: In this paper , the authors developed a magnesium bromide as an effective solid-free, high-density packer fluid (HDPF) for oilfield applications, which has a low value of plastic viscosity (1.95 cP to 7.05 cP) and also exhibits a high density of 13.41 lb/gal, a specific gravity of 1.61.
Abstract:
The rheology of a packer fluid (PF) is the most crucial aspect prompting the efficacious well completion effectiveness. In the drilling industry, a high-density, solid-free, low viscosity, and alkaline pH packer fluid is a big advancement and requirement. Here, we develop a magnesium bromide as an effective solid-free, high-density packer fluid (HDPF) for Oilfield applications. We believe that investigating the rheological parameters such as shear stress, yield point, plastic and apparent viscosity, and gel strength 10 seconds and 10 minutes at a varying temperature of 84°F to 192°F is essential for optimizing the rheological performance. In order to enhance the completion efficiency, our work is more focused on overcoming the rheological and density limitations of existing traditional packer fluid. Our results show that the packer fluid has a low value of plastic viscosity (1.95 cP to 7.05 cP) and also exhibits a high density of 13.41 lb/gal, a specific gravity of 1.61. We have reported the pH at the alkaline region (pH 7.14) with solid-free. Here, we have investigated the Bingham plastic rheological model and Herschel Bulkley model parameters with experimental rheological data, and it's adaptive to novel packer fluid to predict the rheological parameters. Conspicuously, the rheological models, along with data analysis, have enormous possibilities in envisaging real-time quantification of shear stress and viscosity to enable the user to monitor and evaluate a suitable packer fluid in oilfield applications.
TL;DR: In this paper , the authors investigated the laminar-to-turbulent transition for non-Newtonian Herschel-Bulkley fluids that exhibit either a shear-thinning or shearthickening behavior.
Abstract: We investigate the laminar-to-turbulent transition for non-Newtonian Herschel–Bulkley fluids that exhibit either a shear-thinning or shear-thickening behavior. The reduced-order model developed in this study also includes the effect of yield-stress for the fluid. Within our model framework, we investigate how the Newtonian dynamics change when significant non-Newtonian effects are considered either via the flow index n or the yield-stress τ0 or both. We find that an increase in τ0 as well as a decrease in n lead to a delayed transition if a perturbation of the given turbulent intensity is injected at various radial locations. As the radial position of the injection for the perturbation is varied in this study, our reduced-order model allows for the investigation of the flow receptivity to the finite-amplitude perturbations and to their radial position of inception. We observe that, for a given mean flow profile, the same perturbation becomes more prone to induce turbulence the closer it approaches the wall because of its initial amplitude being relatively higher with respect to the local mean flow. An opposite trend is found when the perturbation amplitude is rescaled on the local mean flow.
TL;DR: In this paper, a simple theory for a non-Newtonian fluid, especially the corotational Jeffreys model, was presented, where the frequency spectrum of the strain fluctuations was paid to.
Abstract: This paper presents a simple theory for a non-Newtonian fluid, especially the corotational Jeffreys model. Particular attention is paid to the frequency spectrum of the strain fluctuations, and through this article it is found that the Jeffreys fluid will exhibit an “onset” Reynolds number, above which the effects of the non-Newtonian nature of this fluid are felt. Because time dependent behavior of the strain-strain correlation is emphasized, this study is complementary to the molecular theory.
TL;DR: In this paper, the authors studied the shear flow of a water-based magnetic fluid between concentric annuli by changing the angular velocity of the outer cylinder, and the moment acting on the inner cylinder was measured.
Abstract: We experimentally studied shear flow of a water-based magnetic fluid between concentric annuli. The experiment was carried out by changing the angular velocity of the outer cylinder, and the moment acting on the inner cylinder was measured. Experimental results were discussed in the following three ways. At first the magnetic fluid was treated as a Newtonian fluid, and a small difference in the flow curves was found. Next the power-law fluid theory was applied in order to explain these differences. Finally we examined this flow problem using the micropolar theory, which gives the theoretical relation between the moment acting on the inner cylinder and the angular velocity of the outer one. We measured the coefficient which denoted the micropolar effect, and showed the influence of the substructure on the fluid.