Anisotropic casing solids and fluids identification system and method using shear and flexural acoustic waves

A system for evaluation of a sheathing behind a casing of a wellbore, the system comprising:

• one or more wave generators, wherein each generator of the one or more generators is to provide asymmetric lamb (AL) waves through a casing having an anisotropic property in a first mode of the system and is to provide at least shear horizontal acoustic (SHA) waves, from the AL waves, through the casing in a second mode of the system, the first mode and the second mode to operate concurrently;
• a receiver to receive indications associated with the SHA waves and the AL waves;
• and
• at least one processor adapted to determine a quality of the sheathing behind the casing based in part on the indications associated with the SHA waves and the AL waves, wherein the indications comprise baseline values associated with the anisotropic property of the casing and comprise deviations from the baseline values, the deviations associated with the quality of the sheathing.