METHOD OF INJECTING CARBON DIOXIDE

摘要

A method of storing CO 2 in a porous and permeable hydrocarbon reservoir having at least one injection well and at least one production well penetrating said reservoir, which method comprises the steps of:
(a) recovering a produced fluid stream comprising produced hydrocarbons, produced water, and produced CO 2 from the production well;
(b) passing the produced fluid stream to a production facility where a produced vapour stream comprising carbon dioxide and volatile hydrocarbons is separated from the produced fluid stream;
(c) compressing the produced vapour stream to above the cricondenbar for the composition of the produced vapour stream;
(d) cooling the compressed stream thereby forming a cooled stream that is in a dense phase state;
(e) importing a CO 2 stream to an injection facility wherein the imported CO 2 is either in a liquid state or a supercritical state;
(f) mixing the cooled stream from step (d) with the imported CO 2 stream thereby forming a co-injection stream; and
(g) injecting the co-injection stream into the hydrocarbon bearing reservoir from said injection well.