FWP-FEW0191 Task 1
Lawrence Livermore National Laboratory's Research Activities to Support DOE's Carbon Storage Program
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Performer:  LLNL - Lawrence Livermore National Laboratory
Figure 1: Some of the complementary techniques
required to adequately monitor and understand
subsurface behavior as part of pressure management.
Website:  Lawrence Livermore National Laboratory
Award Number:  FWP-FEW0191
Project Duration:  10/01/2014 – 09/30/2017
Total Award Value:  $2,892,500
DOE Share:  $2,892,500
Performer Share:  $0
Technology Area:  Geologic Storage (GS)/Monitoring, Verification, Accounting, and Assessment (MVAA)
Key Technology:  Task 1 – GS: Geochemical Impacts
Task 2 – GS: Mitigation
Task 3 – GS: Fluid Flow, Pressure, and Water Management
Task 4 – GS: Fluid Flow, Pressure, and Water Management
Task 5 – MVAA: Subsurface Monitoring
Location:  Livermore, California

Task 1 - CO2 Storage Carbonate Reservoirs

The objective is to assess the storage potential of CO2 in carbonate reservoirs as a consequence of mineral dissolution since the storage potential of carbonate reservoirs is poorly understood compared to sandstone reservoirs. Recent experimental results suggest that in many carbonate reservoirs CO2 injection and transport is dominated by fracture flow. The empirically constrained reactive transport model (RTM), which captures the evolution of permeability in both porous and fracture-dominated carbonate cores from two sites in Kansas, is being tested and validated and the NMR permeability equation is being refined using carbonate core from one or two other sites where CO2 storage is planned. Predictions of the evolution of porosity and permeability are being compared against experimental results. Additional work includes: (1) calibration of the NMR tool to estimate permeability, (2) calibration of the RTM and the refined NMR permeability equation using cores from the Big Sky Partnership, and (3) the analysis of Midwest Regional Carbon Sequestration Partnership cores for CO2 enhanced porosity and permeability.