The depths of this formation range from 500 to 2150 meters below sealevel, so the overburden pressure varies from 7 to 35 MPa. The optimal injection rates of the five wells are such that the formation pressure builds up to the pressure limit, which was set to be 90% of the overburden pressure. An insignificant amount of leakage occurs. Thus, this storage case is categorized as "pressure-constrained".
Parts of this formation are located at depths of 6.1 kilometers below sealevel, thus the overburden pressure is as high as 114 MPa. Four wells were placed around these deep regions, according to the trapping structure of the topsurface. The induced pressure rise remains well below the pressure limit. However, the optimized storage strategy includes an amount of CO2 leakage, thus this storage case is categorized as "leakage-constrained".
The overburden pressure in this formation varies from 19 to 55 MPa. Seven wells are placed according to the trapping structure of the top surface, several of which are located within the deepest region. The optimized storage strategy includes an amount of CO2 leakage as well as a pressure rise that reaches the limit. Thus, this storage case is categorized as both "pressure- and leakage-constrained".
Published December 9, 2016