Seismic reservoir characterization of potential CO2 storage reservoir sandstones in Smeaheia area, Northern North Sea

Evaluating any subsurface CO2 storage site comprises the reservoir, seal, and overburden investigation to mitigate injection storage-related complications. The Upper-Middle Jurassic Sognefjord, Fensfjord, Krossfjord formation sandstones are potential reservoirs at Smeaheia area, northern North Sea. area is located east of Troll oil gas field. Upper organic-rich Heather Draupne Formation shales main seals for sandstone reservoirs. In this study, we carried out a prestack seismic inversion obtain elastic property cubes acoustic impedance (AI), velocity ratio (Vp/Vs), bulk density (RhoB). From these cubes, obtained reservoir properties such as porosity (Phi), shaliness (Vsh), permeability (k) formations. We introduced two new equations extract shale volume from inverted in present study. These nonlinear based on AI versus Vp/Vs rock physics template. Both correlated first with well log data then applied (AI Vp/Vs) Vsh Phi cubes. An additional cube (PhiD) was generated RhoB comparison. Finally, using an empirical equation, extracted cube. derived 3D seismic, addition log, revealed vertical lateral variations porosity, shaliness, area. used infer depositional environment viability storage. environments identified were shoreface deltaic sand-body geometries. found Sognefjord possessing best properties, followed by Fensfjord secondary potential. contrast, owed lowest quality