injeção de fluido

A method of injecting CO 2 into an aquifer or a depleted hydrocarbon reservoir via at least one injection well provided with an injection tubing that is in sealing engagement with the injection well, which method comprises operating an injection facility to inject a CO 2 stream down the injection tubing of the injection well at above the critical pressure of CO 2 , characterised in that the injection tubing is provided with a fluid injection control valve at or near the bottom thereof which is closed or closes when the pressure above the valve is less than a pre-set pressure value and opens or reopens when the pressure above the valve is at or greater than said pre-set pressure value.