According to thackney the CO2 doesn’t stay in the ground with this method.
I think they could but at the end of the day its still pointless because we’re talking about a harmless gas.
You pump the co2 in the well and push it into the formation to create a flow path for the gas/oil. Just like any other fracturing fluid, it is going to come back out the well. There is nothing to hold it back and it is mostly “in front” of the oil/gas you want to produce.
“According to thackney the CO2 doesn’t stay in the ground with this method.”
the process works by pumping the fluid, in this case CO2, into the ground to create fractures.
Then upon flowback, the pumped frac fluids are produced back.
Typically, not 100% of the pumped frac fluids are recovered as some are absorbed or otherwise retained in the formation.
In no case are the pumped frac fluids 100% remain in the formation or “sequestered”.