Injection and Reservoir Hazard Management: The Role of Injection-Induced Mechanical Deformation and Geochemical Alteration at In Salah CO2 Storage Project (Status Report, Quarter End, December 2009)
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
The objective of the work performed at LLNL is to integrate LLNL core strengths in geochemistry and geomechanics to better understand and predict the fate of injected CO2 in the field. The mechanical, chemical and transport properties of the reservoir-caprock system are coupled. We are using LLNL-developed quantitative tools to assess the potential for CO2 migration / leakage caused by injection-induced deformation. The geomechanical work is focused upon fault activation, fluid induced fracturing of the caprock and permeability field evolution of the fractured reservoir. These results will be used in concert with reactive transport calculations to predict the ultimate fate of the CO2. We will integrate laboratory and reactive transport modeling to assess CO2 plume migration and partitioning between different trapping mechanisms. Geochemical reactive transport modeling will be used to address multiphase flow (supercritical CO2 and water), CO2 dissolution, mineral sequestration, and porosity/permeability changes. The reactive transport portion of the work ultimately couples with geomechanical modeling. In particular, the distribution of the pressure perturbation induced by injection drives the geomechanical response. Subsequently, the geochemical work determines if water-rock interactions eventually enhance or suppress fractures.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48; AC52-07NA27344
- OSTI ID:
- 1129998
- Report Number(s):
- LLNL--TR-422949
- Country of Publication:
- United States
- Language:
- English
Similar Records
Coupled Flow and Deformation Modeling of Carbon Dioxide Migration in the Presence of a Caprock Fracture during Injection
Impact of layer thickness and well orientation on caprock integrity for geologic carbon storage