Inject tubular well system is take care of inject efficiency improvement in the supercritical carbon dioxide stratum

摘要

PURPOSE: An inject tubular well system for improving the efficiency of injection in a supercritical carbon dioxide stratum is provided to maximize the efficiency of the injection by reducing a pressure in a tubular well hole and a surrounding stratum. CONSTITUTION: A tubular well hole is bored to a supercritical carbon dioxide injection target stratum(1). The density of carbon dioxide is that of liquid, and the viscosity of the carbon dioxide is that of gas. A surface layer(3) includes a blocking stratum(2) which is formed on the upper side of the injection target stratum. A grouting part(10) is formed to the boundary of the injection target stratum. An injecting part(20) is formed form the lower side of the grouting part to the lower side of the tubular well hole, and carbon dioxide passes through the injecting part. An outer packing part(30) is formed between the injecting part and the grouting part in order to block the tubular well hole. A casing part(40) is in contact with the inner side of the grouting part. A bottom grouting part(50) is formed at the bottom of the tubular well hole. A screen part(60) is in contact with the inner side of the injecting part. A cap(70) covers the upper side of the casing part.