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This paper presents the effects of a planned CO2 injection on fault stability at Tomakomai offshore, Hokkaido, Japan. Using slip tendency scheme, the artesian reservoir is estimated to be naturally at moderate slip level around 0.5 at assumed faults optimally oriented for slip. The analysis results indicate that the planned injection has limited effects on fault stability at the site and the increased...
Heterogeneity in mudstone/shale layers has significant effects on seal integrity. The presence of intra-layer sandstone channels in a seal layer may allow the buoyant CO2 to escape from the reservoir, even if the globally- averaged permeability of the seal layer seems sufficiently low. We carried out numerical simulations to study the effects of seal discontinuity on the long-term behaviour of CO2...
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