Computational Fluid Dynamics Modeling of Pipe Eccentricity Effect on Flow Characteristics of Newtonian and Non-Newtonian Fluids

Date

2011-01-01

Author

SORGUN, MEHMET

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

163
views

0
downloads

The prediction of accurate drilling fluids behavior inside an annulus is especially important in drilling engineering during hydraulic program design. The flow characteristics of Newtonian and non-Newtonian fluids drastically change in the annuli when the inner pipe is eccentric. In this study, the fluid flow inside concentric, partially eccentric, and fully eccentric annuli are modeled using computational fluid dynamics. Computational fluid dynamics simulations are performed to investigate the effect of pipe eccentricity on frictional pressure loss, tangential velocity, axial velocity, and effective viscosity of water and non-Newtonian fluids for two horizontal wellbore sections (0.074-0.046 m, 0.0185-0.0117 m). Computational fluid dynamic software predictions of pressure losses are verified with experimental data as well as basic theoretical calculations. Predicted and experimental pressure drop values are in good agreement with each other almost for all cases. It emerged that pipe eccentricity drastically decreases frictional pressure loss but significantly increases the tangential velocity and effective viscosity in annuli, if all other parameters are kept constant. Nevertheless, as the fluid viscosity is increased, the pipe eccentricity effect on tangential velocity becomes more severe.

Subject Keywords

Fuel Technology, Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, Nuclear Energy and Engineering

URI

https://hdl.handle.net/11511/64101

Journal

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS

DOI

https://doi.org/10.1080/15567036.2010.492381

Collections

Department of Petroleum and Natural Gas Engineering, Article

Suggestions

OpenMETU
Core

Trajectory Estimation in Directional Drilling Using Bottom Hole Assembly Analysis Dogay, S.; Ozbayoglu, E.; Kök, Mustafa Verşan (Informa UK Limited, 2009-01-01) The aim of this study is to put together the basic concepts of mechanics on drill string which are related to directional drilling, thus finding a less complicated and more economical way for drilling directional wells. Slick bottom hole assembly, which has no stabilizers attached, and single stabilizer bottom hole assembly are analyzed through previously derived formulas gathered from the literature that are rearranged for this study. An actual directional well is re-drilled theoretically with a slick asse...
Predicting Frictional Pressure Loss During Horizontal Drilling for Non-Newtonian Fluids SORGUN, MEHMET; Ozbayoglu, M. E. (Informa UK Limited, 2011-01-01) Accurate estimation of the frictional pressure losses for non-Newtonian drilling fluids inside annulus is quite important to determine pump rates and select mud pump systems during drilling operations. The purpose of this study is to estimate frictional pressure loss and velocity profile of non-Newtonian drilling fluids in both concentric and eccentric annuli using an Eulerian-Eulerian computational fluid dynamics (CFD) model. An extensive experimental program was performed in METU-PETE Flow Loop using two ...
Analytical and Numerical Modeling of CO2 Sequestration in Deep Saline Aquifers Ozgur, E.; Gumrah, F. (Informa UK Limited, 2010-01-01) The analytical and numerical modeling of CO2 sequestration in deep saline aquifers having different rock and fluid properties was studied under diffusion and convection mechanisms. In a diffusion dominated system, an aquifer with 100 m thickness was saturated with CO2 after 10,000,000 years. It was much earlier in a convective dominant system. In the diffusion process, the dissolution of CO2 in aquifer increased with porosity increase; however, in a convection dominant process dissolution of CO2 in aquifer ...
Integrated analysis of pressure response using pressure-rate convolution and deconvolution techniques for varied flow rate production in fractured formations Al-Rbeawi, Salam (Elsevier BV, 2018-03-01) This paper introduces an integrated analysis for pressure transient behavior of conventional and unconventional multi-porous media reservoirs considering varied flow rate conditions. It focuses on the applications of pressure-rate convolution and deconvolution techniques for analyzing pressure records of homogenous single porous media, double porous media, and triple porous media reservoirs. The tasks covered in this paper are: Deconvloving pressure response, characterizing and developing analytical models ...
Determination of Rheological Models for Drilling Fluids (A Statistical Approach) Kök, Mustafa Verşan (Informa UK Limited, 2004-01-16) 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....

Citation Formats

M. SORGUN, “Computational Fluid Dynamics Modeling of Pipe Eccentricity Effect on Flow Characteristics of Newtonian and Non-Newtonian Fluids,” ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, pp. 1196–1208, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64101.