World-class training for the modern energy industry

Seals, Containment and Risk for CCS and Hydrogen Storage (E570)

  • TypeType: Virtual
  • TypeDiscipline: Carbon Capture and Storage, GeoEnergy Transition
  • TypeDuration: 14 hrs, 2:00pm-5.30pm BST

Tutor(s)

Richard Swarbrick: Manager, Swarbrick GeoPressure

Overview

This course examines the nature and properties of seals as they relate to containment for permanent storage of CO2 and cyclical storage of hydrogen and/or compressed air. The course will provide a grounding in the geomechanics of seals and how seals and their properties are created in the subsurface. While most data and analysis relating to seals has been acquired from and applied to the containment of oil and gas, this course will show how such data can be applied to CCS and gas storage. Particular attention will be given to the different sealing requirements of CO2 and hydrogen relative to oil/gas and water.

Duration and Logistics

Classroom version: A 2-day course comprising a mix of lectures, case studies and exercises. The manual will be provided in digital format and participants will be required to bring a laptop or tablet computer to follow the lectures and exercises.

Virtual version: Four 3.5-hour interactive online sessions presented over 2 or 4 days comprising a mix of lectures and exercises. The course manual will be provided in digital format.

Level and Audience

Advanced. This course is aimed at geoscientists and engineers working in energy transition with responsibility for projects to assess and manage gas storage

Objectives

You will learn to:

  1. Evaluate the nature of containment seals and their properties in the deep earth (>1km/0.62 miles below surface).
  2. Apply knowledge of seal integrity to estimates of column heights and associated storage volumes.
  3. Assess the concepts of seal integrity and how to predict risk of seal breach / failure.
  4. Appraise current knowledge of seal behaviour.
  5. Manage the requirements for permanent CO2 storage using CCS with short-term / cyclic storage for hydrogen / air.
  6. Characterize data requirements and limitations to assess seal integrity and risk (mainly sourced from oil / gas boreholes).
  7. Evaluate different trapping requirements for gas storage (currently data-poor) relative to oil / gas (historically data-rich).

Course Content

Sessions 1 and 2

  • Objectives and overview of seals in context of CO2 and hydrogen / compressed air
  • Containment – membrane seals: principles and relationship with gas column height and storage volume
  • Containment – hydraulic seals: principles and relationship to regional and local stress fields; difference between regional top seal and fault seal behaviour
  • Geomechanics of seals
  • Rock type and rock properties that make satisfactory seals
  • Seal integrity: relationships between rocks and fluid stresses; identification of seals, including use of pore fluid pressure; evidence of seal failure; and timescales of sealing contrasting geological and human timescales
  • Seal capacity: modelling seal behaviour; mechanical earth models; and relationship with storage volumes
  • Seal failure: failure criteria and migration mitigation

Sessions 3 and 4

  • Data used to identify seals, including knowledge of rock properties. Use of borehole and seismic data, and data that can be used for calibration of earth models
  • Seal risk – safe operating limits: regulatory frameworks and public perception
  • Seal risk case study
  • CCS – saline aquifers and case studies
  • CCS – depleted fields and case studies
  • Hydrogen (and compressed air) storage and case studies
  • Many sessions include short exercises to emphasise learnings
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