A new application of the Godunov scheme to describe dynamic oil-well behavior is presented. The numerical model is able to capture discontinuities associated with surface flow-rate variations. The finite volume method and Riemann problems are utilized for building the unsteady discrete solution. Initial and boundary conditions are related to cases of static, steady and transient well condition. Well data used in simulation are taken from true operational conditions and well mechanical configuration. The results of Godunov’s modeling describe the behavior of transient pressure and transient flow rate inside drill pipe and annulus. These profiles are commonly caused by turning on, adjusting mud flow rate and turning off the rig pumps. The evaluated rig indicators are: back pressure, pumping pressure, bottomhole pressure and injected flow rate. Calculated transient profiles are physically consistent and in good agreement with published well data. Therefore, engineering contribution is the application of first-order Godunov method to evaluate the transient hydraulics whereas variations of mud flow rate; also, the analysis and interpretation of the dynamic pressure behavior travelling inside the well. The Godunov scheme has robust engineering applications for modeling the transient drilling hydraulics, e.g., managed pressure drilling, hydraulics of pipe connections, and foam cementing, as well.
| Published in | International Journal of Oil, Gas and Coal Engineering (Volume 5, Issue 5) |
| DOI | 10.11648/j.ogce.20170505.16 |
| Page(s) | 116-123 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2017. Published by Science Publishing Group |
Drilling Hydraulics, Godunov Scheme, Managed Pressure Drilling, Bottom-Hole Pressure
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APA Style
Rubén Nicolás-López, Angel Sánchez-Barra, Oscar Valdiviezo-Mijangos. (2017). Analysis of Wellbore Drilling Hydraulics Applying a Transient Godunov Scheme Considering Variations of Injected Flow Rates. International Journal of Oil, Gas and Coal Engineering, 5(5), 116-123. https://doi.org/10.11648/j.ogce.20170505.16
ACS Style
Rubén Nicolás-López; Angel Sánchez-Barra; Oscar Valdiviezo-Mijangos. Analysis of Wellbore Drilling Hydraulics Applying a Transient Godunov Scheme Considering Variations of Injected Flow Rates. Int. J. Oil Gas Coal Eng. 2017, 5(5), 116-123. doi: 10.11648/j.ogce.20170505.16
AMA Style
Rubén Nicolás-López, Angel Sánchez-Barra, Oscar Valdiviezo-Mijangos. Analysis of Wellbore Drilling Hydraulics Applying a Transient Godunov Scheme Considering Variations of Injected Flow Rates. Int J Oil Gas Coal Eng. 2017;5(5):116-123. doi: 10.11648/j.ogce.20170505.16
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Download@article{10.11648/j.ogce.20170505.16,
author = {Rubén Nicolás-López and Angel Sánchez-Barra and Oscar Valdiviezo-Mijangos},
title = {Analysis of Wellbore Drilling Hydraulics Applying a Transient Godunov Scheme Considering Variations of Injected Flow Rates},
journal = {International Journal of Oil, Gas and Coal Engineering},
volume = {5},
number = {5},
pages = {116-123},
doi = {10.11648/j.ogce.20170505.16},
url = {https://doi.org/10.11648/j.ogce.20170505.16},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20170505.16},
abstract = {A new application of the Godunov scheme to describe dynamic oil-well behavior is presented. The numerical model is able to capture discontinuities associated with surface flow-rate variations. The finite volume method and Riemann problems are utilized for building the unsteady discrete solution. Initial and boundary conditions are related to cases of static, steady and transient well condition. Well data used in simulation are taken from true operational conditions and well mechanical configuration. The results of Godunov’s modeling describe the behavior of transient pressure and transient flow rate inside drill pipe and annulus. These profiles are commonly caused by turning on, adjusting mud flow rate and turning off the rig pumps. The evaluated rig indicators are: back pressure, pumping pressure, bottomhole pressure and injected flow rate. Calculated transient profiles are physically consistent and in good agreement with published well data. Therefore, engineering contribution is the application of first-order Godunov method to evaluate the transient hydraulics whereas variations of mud flow rate; also, the analysis and interpretation of the dynamic pressure behavior travelling inside the well. The Godunov scheme has robust engineering applications for modeling the transient drilling hydraulics, e.g., managed pressure drilling, hydraulics of pipe connections, and foam cementing, as well.},
year = {2017}
}
TY - JOUR T1 - Analysis of Wellbore Drilling Hydraulics Applying a Transient Godunov Scheme Considering Variations of Injected Flow Rates AU - Rubén Nicolás-López AU - Angel Sánchez-Barra AU - Oscar Valdiviezo-Mijangos Y1 - 2017/10/24 PY - 2017 N1 - https://doi.org/10.11648/j.ogce.20170505.16 DO - 10.11648/j.ogce.20170505.16 T2 - International Journal of Oil, Gas and Coal Engineering JF - International Journal of Oil, Gas and Coal Engineering JO - International Journal of Oil, Gas and Coal Engineering SP - 116 EP - 123 PB - Science Publishing Group SN - 2376-7677 UR - https://doi.org/10.11648/j.ogce.20170505.16 AB - A new application of the Godunov scheme to describe dynamic oil-well behavior is presented. The numerical model is able to capture discontinuities associated with surface flow-rate variations. The finite volume method and Riemann problems are utilized for building the unsteady discrete solution. Initial and boundary conditions are related to cases of static, steady and transient well condition. Well data used in simulation are taken from true operational conditions and well mechanical configuration. The results of Godunov’s modeling describe the behavior of transient pressure and transient flow rate inside drill pipe and annulus. These profiles are commonly caused by turning on, adjusting mud flow rate and turning off the rig pumps. The evaluated rig indicators are: back pressure, pumping pressure, bottomhole pressure and injected flow rate. Calculated transient profiles are physically consistent and in good agreement with published well data. Therefore, engineering contribution is the application of first-order Godunov method to evaluate the transient hydraulics whereas variations of mud flow rate; also, the analysis and interpretation of the dynamic pressure behavior travelling inside the well. The Godunov scheme has robust engineering applications for modeling the transient drilling hydraulics, e.g., managed pressure drilling, hydraulics of pipe connections, and foam cementing, as well. VL - 5 IS - 5 ER -
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