Patent ID: 8800651

Claim:
A method for estimating a downhole wellbore parameter, comprising: adjusting a characteristic of an input fluid to a wellbore through a first range of input values of the input fluid; measuring, in the wellbore, a first plurality of output values of the input fluid that vary in response to the first range of input values, the first plurality of output values representative of a downhole condition of a downhole system; based on the measured first plurality of output values, calibrating at least one downhole sensor operable to measure the first plurality of output values; subsequent to the calibration, adjusting the characteristic of the input fluid to the wellbore through a second range of input values; measuring, in the wellbore, a second plurality of output values of the input fluid that vary in response to the input values in the second range, the second plurality of output values representative of the downhole condition; and estimating a wellbore parameter distinct from the downhole condition based on the measured second plurality of output values.