As interest in carbon capture and storage continues to grow, evaluation of the effect of CO2 injection on the reservoir is increasingly important. Among various technical challenges faced in this effort, formation damage is a critical factor influencing reservoir integrity and long-term injectivity. The complete paper presents laboratory testing methods and evaluation criteria designed to improve understanding of both the origin and extent of formation damage associated with CO2 injection.
Background
The work described in this paper is part of a broader study investigating important considerations for CO2 sequestration. Initial research efforts focused on evaluating seal properties and methods for determining entry pressure. As part of this effort, samples from four carbon capture, usage, and storage reservoir seals and one proxy formation were exposed at static conditions to CO2-saturated brine at 150°F and 1,500 psi for periods of 1, 3, and 6 months.
