Determination of Rheological Models for Drilling Fluids (A Statistical Approach)

Date

2004-01-16

Author

Kök, Mustafa Verşan

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A rheological model conventionally characterizes non-Newtonian drilling fluids. Parameters of the rheological models are estimated by explicitly solving the required number of equations simultaneously. Rheological models are stochastic and this study considers only the deterministic part of the model. Observed data is accepted as arising from randomness due to the system. A nonlinear least squares method is applied to readings of 6 standard Fann viscometer speeds in order to estimate the models' parameters. Forty-five KCl/polymer data sets of varying compositions are prepared. The best-fitting model is chosen according to the box-plot comparison of residual mean squares (RMS) values of 5 candidate mostly used rheological models. The RMS analysis resulted in the Power Law Model to be acceptably defining the behavior of KCl/polymer type drilling fluids. R2 analysis, which gives only a rough indication, is also performed and observed to support the model selection.

Subject Keywords

Fuel Technology, Energy Engineering and Power Technology, General Chemical Engineering

URI

https://hdl.handle.net/11511/34407

Journal

Energy Sources

DOI

https://doi.org/10.1080/00908310490258533

Collections

Department of Petroleum and Natural Gas Engineering, Article

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Citation Formats

M. V. Kök, “Determination of Rheological Models for Drilling Fluids (A Statistical Approach),” Energy Sources, pp. 153–165, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34407.