Journal
PETROLEUM SCIENCE AND TECHNOLOGY
Volume 33, Issue 12, Pages 1275-1285Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10916466.2011.606253
Keywords
chemical osmosis; failure criterion; poro-chemo-thermo-elastic; shale; thermal osmosis; wellbore stability
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Field evidence indicates that the thermal and chemical regimes in wellbore considerably affect the wellbore stability. This study presents a general coupled model for transport of solute, solvent and heat including their combined effects on the wellbore stability. Optimization of drilling fluid parameters is crucial for wellbore stability analysis particularly in high pressure-high temperature environments. The coupled effects of chemical potential and temperature gradients on fluid flow significantly change the pore pressure and stress around a borehole. The effects of various parameters such as mud weight, solute concentration gradient, shale properties, and temperature gradient on wellbore stability have been investigated.
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