About six months ago I realized that this is the end game in putting aside objections to both carbon dioxide and energy exploration. Once a viable technique has been developed to frack using CO2 on a mass scale, then there can be no remaining arguments against turning the US into the world’s largest energy producer.
I hope that most people understand that co2 are air sans oxygen
Why would you think that fracturing using CO2 is a good idea?
Liquid is used to carry the sand. The sand is necessary to hold open the cracks after the fracturing fluid is removed. The fracturing fluid must be removed to allow the oil/gas to flow back out the well head.
Your method, if it could even work, does not sequester the CO2. It would come back out before the production would start. Methods of CO2 flood as described in this article have been used successfully in Texas for many years. CO2 flood leaves the CO2 in the reservoir.