A four-parameter rheological model and its hydraulic calculation formulas

作者：Fan Honghai^*; Wang Guo; Zhang Hui; Liu Yang

来源：Acta Petrolei Sinica, 2010, 31(3): 511-515.

• Assessment models
• Flow behavior index
• Flow regimes
• Generalized Reynolds number
• Pressure drop calculations
• Rheological models
• Rheological parameter

A four-parameter rheological model was proposed for accurately describing any time-independent drilling fluid. A variety of data from literatures were used to evaluate the fitting effect of the four-parameter model to different fluids. A generalized hydraulic calculation model was developed, which was applicable to any time-independent non-Newtonian fluid. The laminar flow pressure loss computing model was built using the characteristic parameter method of pipe flow. The turbulent pressure loss was calculated by using the semi-empirical formula. The flow regime method was established by quoting a generalized flow behavior index and the generalized Reynolds number. The computer program of the four-parameter model was developed. The predictions of the developed method were compared with several sets of experimental hydraulic data from different sources. The tested cases include laminar and turbulent flows of various drilling fluids in both pipe and annular geometry. The generalized hydraulic calculation method is superior to currently available standard techniques.

• 出版日期2010
• 单位中国石油大学（华东）