COST COMPARISON AMONG CONCEPTS OF INJECTION FOR CO_2 OFFSHORE UNDERGROUND SEQUESTRATION ENVISAGED IN JAPAN

摘要

In connection with CO_2 sequestration into offshore aquifers, one of the basic considerations is how the CO_2 can be brought economically from the coast to the intended geological formations. Here, RITE, in cooperation with oil industry experts, implemented a preliminary study in which several possible methods were assessed using CAPEX and OPEX, with demolition costs included. Although which method is superior varies, depending on geological, geographical, environmental and several other conditions applicable to each specific project, the outcome of the study explicitly indicates that "extended reach drilling (ERD) from onshore" and "subsea completion" are worth considering when those hypothetical parameters employed in the study are applicable.