Cavitation, dissolver, and sand integration for wellbore descaling

A system comprising:

• a treatment fluid comprising sand and a chemical dissolver configured to react with and dissolve wellbore scale, wherein the chemical dissolver comprises a chelating agent comprising ethylenediamine tetraacetic acid;
• a pump configured to flow the treatment fluid into a wellbore formed in a subterranean formation;
• and
• an ultrasonic probe configured to generate ultrasound energy within the wellbore to generate cavitation in the treatment fluid to facilitate dislodging action on the wellbore scale and to generate vibrations in the sand of the treatment fluid to provide abrasive and dislodging action on the wellbore scale.

A method comprising:

• flowing a treatment fluid into a wellbore formed in a subterranean formation, the treatment fluid comprising sand and ethylenediamine tetraacetic acid configured to react with and dissolve wellbore scale;
• generating ultrasound energy within the wellbore;
• generating cavitation in the treatment fluid in response to generating the ultrasound energy within the wellbore to facilitate generation of fractures in the wellbore scale and dislodging the wellbore scale;
• generating vibrations in the sand of the treatment fluid in response to generating the ultrasound energy within the wellbore to facilitate abrasive and dislodging action on the wellbore scale;
• flowing the sand into the generated fractures in the wellbore scale to hold open the generated fractures and increase an exposed surface area of the wellbore scale to facilitate contact of the ethylenediamine tetraacetic acid with the wellbore scale;
• and
• contacting the ethylenediamine tetraacetic acid with the wellbore scale for a specified time duration causing the ethylenediamine tetraacetic acid to react with and dissolve the wellbore scale within the wellbore.