TY - JOUR
ID - 4603
TI - Effect of non-Darcy Flow on induced stresses around a wellbore in an anisotropic in-situ stress Field
JO - Scientia Iranica
JA - SCI
LA - en
SN - 1026-3098
AU - Tohidi, Amin
AU - Fahimifar, Ahmad
AU - Rasouli, Vamegh
AD - Department of civil and environmental Engineering, Amirkabir University of Technology
AD - Department of Petroleum Engineering, University of North Dakota, Grand Forks, ND, USA
Y1 - 2019
PY - 2019
VL - 26
IS - 3
SP - 1182
EP - 1193
KW - Non-Darcy flow
KW - Wellbore induced stresses
KW - Analytical solution
KW - Numerical Models
KW - sensitivity analysis
DO - 10.24200/sci.2017.4603
N2 - After drilling a well, the stresses will be altered and the induced stresses present the new state of stress. These induced stresses which result in geomechanical problems. The studies indicate that the flow of hydrocarbon into the wellbore influences the induced stresses. Darcy equation has been used in the past; however, the laminar flow assumption embedded in this equation cannot correctly model the flow of fluid when a non-Darcy flow dominates near a wellbore. Example of such situation includes the gas wells. In this study, analytical equations are developed to incorporate the effect of non-Darcy flow on the induced stresses around a wellbore. These equations developed based on Forchheimer flow equation. Then the simplified solutions were presented by considering the second term of Forchheimer flow equation. It was found that the difference between the results from Darcy and non-Darcy flow models is proportional to the drawdown pressure. Further studies included numerical simulation of non-Darcy fluid flow in a typical reservoir. Comparison of the results with the analytical models indicated that the magnitude of stresses in non-Darcy flow is larger than of Darcy flow. Finally, sensitivity of the reservoir properties on the induced stresses in the non-Darcy flow regime was investigated.
UR - http://scientiairanica.sharif.edu/article_4603.html
L1 - http://scientiairanica.sharif.edu/article_4603_25494228b6e375366bfc5db609a72458.pdf
ER -