Method for combining the results of ultrasound and x-ray and neutron cement evaluation logs through modality merging

A method comprising:

• causing a first logging tool to generate ultrasonic measurement data using ultrasound energy, the first measurement data characterizing a first property of a cement volume surrounding a borehole with respect to depth;
• causing a second logging tool to generate non-ultrasonic measurement data using non-ultrasonic radiant energy, the non-ultrasonic measurement data characterizing a second property of the cement volume with respect to depth, wherein the first and second properties are different;
• quantizing ultrasonic log data comprising the ultrasonic measurement data by automatically assigning discrete values from a first set of discrete values for the first property to the ultrasonic log data as a function of depth to generate a first dataset that characterizes the first property of the cement volume with respect to depth;
• quantizing non-ultrasonic log data comprising the non-ultrasonic measurement data by automatically assigning discrete values from a second set of discrete values for the second property to the non-ultrasonic log data as a function of depth to generate a second dataset that characterizes the second property of the cement volume with respect to depth;
• and
• processing the first dataset and the second dataset using a modality merging technique to generate a third dataset that characterizes integrity of the cement volume with respect to depth, wherein processing the first and second datasets using the modality merging technique comprises informing an inversion of the ultrasonic measurement data using the non-ultrasonic measurement data as a function of depth.