SUITABILITY ASSESSMENT AND STORAGE CAPACITY ESTIMATES OF RAMBUTAN COAL SEAMS FOR CO2 STORAGE

Abstract

Coal seams are an alternative storage options besides depleted oil and gas reservoirs and deep saline
formations. They are suitable to different degrees for CO2 geological storage as a result of various intrinsic
and extrinsic. The potential use of this geological media requires suitability assessment and the amount
of CO2 can be stored. This paper presents the fi rst attempt to evaluate the characteristics of coal seams in
Rambutan Field, South Sumatera, in terms of their suitability for CO2 storage and the potential storage
capacity. A set of 5 semi-qualitative criteria has been developed for the assessment of 4 seams that includes
permeability, coal geometry, structure, homogeneity and depth. CO2 adsorption capacity estimates were
derived from laboratory experiment by employing Isothermal Langmuir. The results show the 4 seams in
general are suitable for CO2 storage. The adsorption capacity from seam 2, 3, 5 and P are 22.18, 25.09,
24.53, and 34.12 m3/t dry-ash-free basis respectively. The highest CO2 storage capacity can be stored at
seam P enabling the CO2 in dense phase (supercritical).