CleanTech Geomechanics Inc. (CTG) is a Canadian company dedicated to the development of technologies for sustainable resource & energy development. CTG’s primary area of expertise is geomechanics and using this field to address issues related to sustainable resource & energy development. CTG maintains a collaborative technology development relationship with Terralog Technologies Inc. (TTI) and the University of Waterloo (Dept. of Earth and Environmental Sciences). CTG developed the concept of Cased-Wellbore Compressed Air Storage (CWCAS). CWCAS is an advanced type of Compressed Air Energy Storage (CAES) solution that maintains the advantages of existing CAES processes and mitigates the disadvantages.