Inversion of Borehole Temperature Data Using Surrogate Model

Jia Wang , Fabian Nitschke , Emmanuel Gaucher & Thomas Kohl
The undisturbed or static formation temperature (SFT) is a key objective of the borehole measurements analysis. Conventional methods to estimate SFT require borehole temperature data measured during thermal recovery periods. As such, shut-in conditions should prevail for temperature logging, which can be both economically and technically prohibitive in actual operational conditions, especially for high-temperature boreholes. This study investigates the use of temperature logs obtained under injection conditions for SFT determination by applying a Bayesian inference...
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