Energy Transition

Participants will learn to:

1. Evaluate well integrity with respect to CO2.
2. Consider the challenges that CO2 gas versus dense phases present and undertake PVT calculations.
3. Assess the corrosive impacts of CO2 including the impact of stress corrosion at low temperatures.
4. Formulate stress calculations for the liner, production casing and tubing.
5. Analyse the issues of cement design for CO2 wells, including both legacy and new well designs.
6. Examine the issues involved in repurposing existing wells with reference to existing casing designs and cement evaluation.
7. Construct risk assessments and understand monitoring technology and regulatory frameworks.

The self-paced e-learning elements of this course are

• Fundamentals of CCS
• Behaviour of CO2 in Reservoirs
• Monitoring CO2 Storage

Seminar Topcis

Topic 1

• Overview, global and subsurface perspective
• Well integrity perspective with respect to CCS - Short vs. long-term and existing vs. new design 

 Topic 2

• The volume challenge with CO2 and facilities challenges, including calculations – gas vs. dense phase
• PVT Properties of CO2 with phase envelope and enthalpy
• Associated thermal calculations for CCS - the potential for large cooling
• Worked Example using PVT and enthalpy calculations
• Example using demo software (Oliasoft WellDesign)

Topic 3

• Corrosion and material selection with specific reference to CO2
• Wet vs. dry CO2
• Stress corrosion cracking at low temperatures
• Worked example using partial pressures and corrosion experimental data
• Tubular material properties and asymmetry/ anisotropy as well as temperature dependent yield and coefficient of thermal expansion

Topic 4

• Working stress calculations and well design
• Formulate hand calculations and software input
• Simple hand calculations using Session 2 temperatures for the liner, production casing and tubing
• Worked Example demo using software of tubing, liner and production casing
• The specific difficulties with the VME / Design limit plot
• Well design with reference to the cap rock and cap rock fracturing and cap rock strength reduction

Topic 5

• Equipment and tubular connections.  CAL III and CAL IV ISO testing and connection envelopes
• Cement design for CCS – legacy vs. new well designs

Topic 6

• Repurposing existing wells with reference to existing casing designs and cement evaluation
• Managing offset to injection legacy suspended and abandoned wells
• Example from Goldeneye
• Risk assessments, monitoring technology and regulatory framework

Attendees should be capable well engineers (completions or drilling) or technical specialists such as chemists, geomechanics, or material specialists.