Junyan Liu1, Ju Liu1, Yan Wang1, Shuang Liu1, Qiao Wang1, Yihe Du2,*
FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.1, pp. 205-218, 2024, DOI:10.32604/fdmp.2023.030645
Abstract The variation of the principal stress of formations with the working and geo-mechanical conditions can trigger
wellbore instabilities and adversely affect the well completion. A finite element model, based on the theory of
poro-elasticity and the Mohr-Coulomb rock damage criterion, is used here to analyze such a risk. The changes
in wellbore stability before and after reservoir acidification are simulated for different pressure differences. The
results indicate that the risk of wellbore instability grows with an increase in the production-pressure difference
regardless of whether acidification is completed or not; the same is true for the instability area. After acidizing, the… More >
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