Abstract
Validating a wellbore simulator and calibrating it to a particular well is achieved through matching analysis, the comparison of calculated downhole pressure/temperature profiles with measured data from a discharging well. For matching analysis to be effective, it is shown that any variations or discontinuities in such measurements must be examined, and appropriate matching criteria specified. A procedure for determining the suitability of downhole measurements for application to matching is presented. This procedure, termed the lower bound method, additionally provides lower bounds to the wellbore fluid's CO 2 or NaCl content. The importance of appropriately modelling secondary feed characteristics down the wellbore is also discussed, and an expression is provided for estimating the CO 2 concentration of the fluid entering the wellbore at a two-phase feed zone.
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