Brine Extraction and Storage Test (BEST):
Field Demonstration at Plant Smith Generating Station Assessment of Opportunities for Optimal Reservoir Pressure Control, Plume Management and Produced Water Strategies
The overall objective of the EPRI-led BEST project to be performed at the Lansing Smith electric generating station near Panama City, Florida, is to help develop cost-effective pressure control, plume management and produced water strategies that can be used to improve reservoir storage efficiency and capacity, and demonstrate safe, reliable containment of CO2 in deep geologic formations with CO2 permanence of 99% or better. In addition, operational experience gained from implementing the field demonstration at a power plant site will provide realistic and practical learnings that can be incorporated into future updates of the United States Department of Energy (DOE) best practice manuals.
In collaboration with EPRI, ARI, and Southern Company, LBNL will evaluate cost effective CO2 injection, brine production and brine treatment strategies for the control of subsurface pressures and plume movement.
Preliminary simulation and optimization studies were conducted in Phase I of the project to: (1) design optimized water production strategies that meet the pressure management goals while minimizing the volume of extracted brine; (2) query the reservoir response to the proposed injection and extraction schemes; and (3) to demonstrate that detectable monitoring signals are generated for measuring pressure buildup, differential pressure plume evolution, and injected fluid plume migration.
Currently in Phase II, the project involves a field demonstration to implement and test the strategies at the host site Plant Smith near Panama City, Florida, operated by Gulf Power Company. No structural risks for leakage such as faults and fracture zones were identified during the screening effort at Plant Smith. For the purpose of demonstration, the pressure management scenarios included a purely hypothetical and critically stressed fault near the planned injection area. The Phase II field demonstration site includes a recently drilled injection well (TIW-INJ), a monitoring and extraction well (TIW-5), and an existing injection well (TIW-1) that is repurposed as monitoring and passive relief well. The project plans to inject low-salinity water and extracted brine through TIW-INJ into isolated sandstone layers of the Lower Tuscaloosa Massive sand at about 1500 m depth by testing and applying “active” extraction and “passive” pressure relief strategies for pressure control. Injection is planned to start by mid-2021.
This field demonstration project will use advanced simulation and optimization tools to implement an adaptive pressure management scheme for the control of subsurface pressures produced by injected waste water that is tailored to the management goals and geologic conditions at the field site. During the field demonstration, the monitoring program has the following principal objectives: (1) To track the position of the pressure front and low-salinity plume created by injected wastewater with sufficient spatial and temporal resolution such that adaptive pressure management strategies can be demonstrated; and (2) to validate predictions of pressure, fluid movement, and differential pressure plumes in the reservoir. This will be accomplished using monitoring methods over a range of spatial scales and at a number of time steps. Continuous and time-lapse borehole measurements of fluid pressure, flow rate, temperature, and/or conductivity will be used to provide high-resolution, ground-truth measurements at the three project wells. In addition to borehole-based measurements, the monitoring plan relies heavily on time-lapse geophysical methods, which provide broad spatial coverage and are sensitive to subsurface pressure and fluid salinity changes.
LBNLs PROJECT TEAM MEMBERS