Evaluation of CO2 storage sites in geological basins:Part3
Speaker: Yang Chien-nan
Abstract
Careful site characterization is critical for successful geologic storage of carbon dioxide (CO2) because of the many physical and chemical processes impacting CO2 movement and containment under field conditions. Traditional site characterization techniques such as geological mapping, geophysical imaging, well logging, core analyses, and hydraulic well testing provide the basis for judging whether or not a site is suitable for CO2 storage.Numerical modeling plays a central role in integrating geological, geophysical, and hydrological field observations. At the Frio brine pilot, in addition to traditional site-characterization techniques, that can help us to monitor both the injection well and observation well. And then, can calibrate the numerical model result.
Geologic storage of CO2 is expected to produce plumes of large areal extent, and some leakage may occur along fractures, fault zones, or improperly plugged preexisting wellbores. The numerical simulations presented here confirm this expectation, but reveal self-limiting features
as well. It seems unlikely that CO2 leakage could trigger a high-energy run-away discharge, a so-called ‘‘pneumatic eruption,’’ but present understanding is insufficient to rule out this possibility.
Reference
Doughty C, Freifeld B.M, Trautz R.C, Site characterization for CO2 geologic storage and vice versa: the Frio brine pilot, Texas, USA as a case study, ENVIRONMENTAL GEOLOGY? ?Volume: 54 Issue: 8 Pages: 1635-1656 (2008).
Karsten Pruess(2007), On CO2 fluid flow and heat transfer behavior in the subsurface, following leakage from a geologic storage reservoir, ENVIRONMENTAL GEOLOGY?? Volume: 54 Issue: 8 Pages: 1677-1686 (2008).