In-Situ Mechanical Characterization Of Cement Sheath Exposed To Chemical Species

A method comprising:

• introducing an ultrasonic tool into a wellbore comprising a composite cement sheath wherein the composite cement sheath comprises an unmodified portion and a chemically modified portion;
• transmitting an ultrasonic wave into the composite cement sheath using the ultrasonic tool;
• measuring an ultrasonic response using the ultrasonic tool;
• determining, based at least in part on the ultrasonic response, at least one dynamic cement physical property;
• and
• inputting the dynamic cement physical property and a volume fraction of water utilized to prepare the composite cement sheath into a composite cement property model and calculating a dynamic cement physical property.

A method comprising:

• preparing a plurality of cement slurries, wherein the plurality of cement slurries each comprise a cement and volume fraction of water;
• curing the plurality of cement slurries to form a plurality of set cement samples;
• exposing the plurality of set cement samples to a chemical species;
• allowing the chemical species to at least partially modify the plurality of set cement samples to form a plurality of composite cement samples;
• measuring a dynamic physical property of each of the plurality of composite cement samples to generate a dynamic physical property dataset;
• measuring a static physical property of each of the plurality of composite cement samples to generate a static physical property dataset;
• correlating the static physical property dataset as a function of the dynamic physical property dataset and volume fraction of water to generate a composite cement property model;
• introducing an ultrasonic tool into a wellbore comprising a composite cement sheath wherein the composite cement sheath comprises an unmodified portion and a chemically modified portion;
• transmitting an ultrasonic wave into the composite cement sheath using the ultrasonic tool;
• measuring an ultrasonic response using the ultrasonic tool;
• determining, based at least in part on the ultrasonic response, at least one dynamic cement physical property of the composite cement sheath;
• and
• inputting the at least one dynamic cement physical property of the composite cement sheath and a volume fraction of water utilized to prepare the composite cement sheath into the composite cement property model and calculating a dynamic cement physical property of the composite cement sheath.