Improved Rheological Model of Oil-Based Drilling Fluid for South-western Iranian Oilfields
Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JPSTR-8-3_005
تاریخ نمایه سازی: 29 آذر 1402
Abstract:
In this study, predictive capabilities of apparent viscosity of oil-based drilling fluids which is used in National Iranian South Oilfields Company (NISOC) were evaluated using Newtonian and non-Newtonian models to drive a new suitable equation. The non-Newtonian models include Bingham plastic, Power law, Herschel-Bulkley, Casson, and Robertson-Stiff. To validate the results, the calculated viscosity from rheology models was compared to the fann ۳۵ data of viscometer. The results showed that Robertson-Stiff model has the best prediction of shear stress and viscosity with an absolute average percent error of ۳.۵۸. This was followed by Herschel-Bulkley, Casson, Power law, Bingham plastic, and Newtonian with the absolute average percent error of ۳.۶۸, ۳.۷۷, ۹.۰۴, ۲۰.۰۹, and ۴۴.۰۲ respectively. Therefore, the new equation was proposed to predict the shear stress for oil-based drilling fluids which is used in Southwestern Iranian Oilfields. In comparison to the results of the experimental data of this study, it was revealed that the proposed equation has a good agreement with the real shear stress and apparent viscosities.
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Authors
Seyed Saied Bahrainian
Department of Mechanical Engineering, Shahid Chamran University of Ahwaz, Ahwaz, Iran
Amin Nabati
Department of Mechanical Engineering, Shahid Chamran University of Ahwaz, Ahwaz, Iran
Ebrahim Haji Davalloo
Department of Mechanical Engineering, Shahid Chamran University of Ahwaz, Ahwaz, Iran
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