A new simulator to determine thermal disturbance and recovery processes during wellbore drilling: Experimental validation with a scaled-down wellbore prototype

摘要

In the present study, a novel simulator is developed. The simulator is built upon the model presented by (Wong et. al. 2017) but considering a Robin boundary condition at the interphase between the rock formation and the bottom-hole. Additionally, simulation results are compared against experiments in a scaled-down bore-hole setup, emulating the most relevant aspects of a real perforation, such as: behaving as a semi-infinite media and considering sequential circulation and shut-in times with varying durations. Moreover, all thermal parameters are independently estimated, such as to diminish cross-correlation between model parameters. Deviations between experiments and the simulations of the proposed model are below 1.2%, for all cases. Deviations for the present model are about an order of magnitude smaller than those obtained by Wong et. al. 2017).