CCS well design

Integrated, model-driven well design

Designing CO₂ injection and monitoring wells requires more than conventional well construction and completions planning—it demands a thorough understanding of the complex interactions between CO₂ injection, reservoir dynamics, and well completion configurations. Transient modeling techniques that assess sensitivity to well injectivity indices, reservoir pressures, and CO₂ injection pressure and temperature under varying seasonal conditions enable more accurate CCS well designs to support intended injection rates and avoid near-wellbore damage that could impair injectivity.

SLB CCS well engineering experts use the Sequestri™ digital ecosystem to model steady-state injection and transient well pressure and temperature conditions. The process includes simulating diverse scenarios to validate key completion component choices (e.g., subsurface safety valves, slotted liners) and surface and downhole equipment material selections. It also encompasses modeling uncontrolled CO₂ leaks at the tree level within various volume containment parameters to help derisk the life of your CCS field.

Keeping regulatory compliance in mind

To support your project’s monitoring and verification strategy, seamless integration of measurement technologies is a core element of our CCS well design workflows. Our completion designs account for optimal placement, efficient deployment and installation, and compatibility of monitoring tools. Additionally, surface equipment and data management platforms are carefully selected to ensure reliable data acquisition, transmission, and analysis—so you can make informed decisions and provide transparency throughout the life of your well.

Design for the unique challenges of CO₂ injection and legacy well environments

• Greenfield CO₂ injection wells: Optimize completion designs based on simulations of reservoir response, temperature transients, and pressure profiles.
• Legacy well remediation: Design workovers or interventions to restore the integrity of existing wells transitioning into injector or monitoring roles.
• Challenging service conditions: Engineer for high-pressure, low-temperature, and corrosive fluid environments encountered with carbon storage.

Enhance site performance, reduce well integrity risk, and increase stakeholder confidence

End-to-end well design tailored for CCS-specific completions

• Trajectory optimization: Well paths that meet surface and subsurface constraints, including anticollision, directional drilling performance, and completion requirements
• Casing and tubing design: For long-term exposure to CO₂ under pressure and temperature extremes
• Completion hardware selection: Upper and lower completion components, such as Integrity™ CCS subsurface safety valves, validated for CO₂ service to reduce risk
• Material selection and validation: In collaboration with SLB metallurgy experts to select materials compatible with CCS well chemistry and stress profiles
• Cementing and fluids strategy: Definition of compressive strength, thickening time, and necessary additives to improve mud and solids removal, ROP, cement bond quality, and cement coverage
• Instrumentation integration: For real-time monitoring tools such as Metris Evolve™ permanent PT gauges and Optiq™ fiber‑optic solutions that enable continuous surveillance