CARBON CAPTURE AND STORAGE

One of the first phases in a project is screening and selecting sites for CO2 storage. In this initials stage, we review available data for a preliminary characterization of the geological structures and their properties. To complement existing data we may acquire additional information from

• regional and local geological surveys
• exploration seismic surveys
• wire line logs and fluid samples
• laboratory measurements
• field experiments

Our site-specific screening methodology also considers other more general social, economic and environmental criteria.

After a site is selected, extensive subsurface characterization establishes whether the reservoir meets geological and another requirements for long-term storage of CO2, We build high-resolution geologic models to assess reservoir capacity, injectivity and containment criteria. With geochemical and geo mechanical processes taken into account, these models simulate sc enarios for injection rates, fluid displacement, CO2 trapping, and containment performance.
We are able to integrate interpretations from there and other sources to evaluate storage performance, monitoring, and mitigation strategies.

We have access to proven technologies to design site-specific injection and monitoring systems for efficient, long-term CO2 storage. our Goal in design and eventual construction is to ensure

• enhanced safety and performance in all operations
• assurance that all delivered CO2 can be injected economically
• control of the CO2 containment, avoiding fracturing of cap rock, reactivation of faults, and leakage
• effective monitoring of the environment (aquifer, surface, atmosphere) to Confirm storage integrity

We have access to sensors and measurement techniques to provide a comprehensive approach to monitoring CO2 storage. Our objective is to manage performance and mitigate risks associated with all phases of the storage project.

• INJECTION: Monitoring of gas composition, pressure, temperature and subsurface geomechanics during CO2 injection tracks.
  
• PERFORMANCE OBJECTIVES: Containment, Monitoring CO2 displacement and distribution in the subsurface verifies the quality of the containment. Data are also uses to benchmark and to calibrate simulation tools.
  
• ENVIRONMENT: Surface monitoring for water quality control or CO2 detection involves installation of sensors and a site-specific monitoring proto.
  

At the end of active operations, when the CO2 supply finishes or the design capacity of the store is reached, the decommissioning phase begins. Legislation will demand a number of years monitoring of the storage site before certification that all the requirements for safe long-term stewardship of the site have been met. Approved technologies and procedures for well abandonment will ensure long-term isolation and CO2 storage integrity.