A screening criterion for selection of suitable CO 2 storage sites

Abstract

Carbon dioxide released into the atmosphere due to anthropogenic activities has raised the alarm of global warming in the near future. CO 2 storage in suitable subsurface geologic media has, therefore, been triggered in recent years. However, identification of suitable sites to store a large quantity of CO 2 for a long period of time is not an easy and straightforward task. Although, a general criterion has already been presented based on local-scale projects in which depth, permeability, porosity, density and containment factors were considered for selection of an appropriate geologic medium, there are many other preliminary factors linked to the storage capacity, injectivity, trapping mechanisms, and containment which should not be neglected during a CO 2 storage site selection. The aim of this paper is to propose a new screening criterion for the CO 2 storage site selection based on a group of key parameters including reservoir and well types, classes of minerals, residual gas saturations, subsurface conditions, rock types, wettability, properties of CO 2 , and sealing potentials. These parameters were combined with those factors presented earlier by other scholars to provide a good insight into the suitable selection of storage sites. Although attempts were made to consider the whole parameters linked to a site selection, more studies are still required to get a final conclusion about the effective parameters which should be a part of the analysis.

Suitability of depleted gas reservoirs for geological CO2 storage: A simulation study

“…During and after injection, trapping mechanisms play their role to store (immobilize) the injected CO 2 , depending on the characteristics of the storage medium . Figure (a) indicates that the mass of CO 2 storage in different gas mediums start to increase slowly until the injection period of 5 years, which is aligned with the earlier studies .…”

“…During and after injection, trapping mechanisms play their role to store (immobilize) the injected CO 2 , depending on the characteristics of the storage medium. 46 Figure 5(a) indicates that the mass of CO 2 storage in different gas mediums start to increase slowly until the injection period of 5 years, which is aligned with the earlier studies. 47 Once injection stops, the mass of the CO 2 stored due to the residual and dissolution trappings starts to decline for a few years, but sharply increases after that.…”

Characterization of Fractured Rocks for the Design of a Pilot-Scale CO2 Injection Site in the Sulcis Basin, Italy

“…In general, the identification of a suitable site to store CO2 is a complex and long process, in which data from different disciplines merge together in order to give a model. The characterization of a geological storage site has the objective of identify the principal features of the reservoir-caprock system, such as depth, permeability, porosity, storage capacity, injectivity, containment, trapping mechanisms [15]. In this section we present a summary of the principal results of the site characterization at the Sulcis basin.…”

Microscale Research on Effective Geosequestration of CO2 in Coal Reservoir: A Natural Analogue Study in Haishiwan Coalfield, China

“…From the macroscopic view, a group of geological factors including occurrence of coal seam, subsurface condition, cap rock types, and regional tectonic condition should be analyzed and evaluated [13][14][15]. The microscopic view refers to the interactions between CO 2 and rocks (coal or cap rock) and the effects of CO 2 on the physical (structure of pore or fracture) and chemical (molecules) properties [16].…”