This paper presents results of analysis of changes in stress state and fault stability related to a planned geological CO2 injection at the Tomakomai offshore site, Hokkaido, Japan. Predicted slip tendency in shallow Moebetsu formations is much lower than that in deep overpressured Takinoue formations, and estimated effects of the planned injection are relatively limited in both formations. Another point is that poro-elastic stress development leads to changes in fault stability compared to that calculated based on pressure buildup alone and the initial stress state. These poro-elastic effects on fault stability are comparable to those due to pressure buildup itself.
|Number of pages||9|
|Publication status||Published - 2014|
|Event||12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014 - Austin, United States|
Duration: Oct 5 2014 → Oct 9 2014
All Science Journal Classification (ASJC) codes