This course considers the properties of carbon dioxide, contrasts its behaviour with that of methane and the interactions between CO2 and water in an aquifer. There is a review of some of the properties of CO2 that affect how different wireline logs respond to it, in particular the significant effects that the gas has on sonic and neutron log responses. The responses on resistivity logs are, however, not very different to the effects of gas or oil. The natural gamma ray tool plays a role in monitoring plumes of CO2 as it is used to assess salt precipitation near the well bore. Pulsed neutron logs provide essential information on the saturation of CO2 in observation wells as part of the process of monitoring the distribution of CO2 plumes in the reservoir. The nature and quality of the data that can be obtained from wireline logs are considered and used to design schedules for running logs in the monitoring processes.
Courses are accessed on the RPS Learning Hub, each course consists of a series of modules of up to 90 minutes learning time, including self-assessment elements. Learning materials are structured into short sections, each including interactive text and image content, animations, video and audio. An end of course quiz is scored to provide the learner with their learning progress.
- The structure of the CO2 molecule and a comparison with the behaviour of methane when injected into an aquifer.
- Use a knowledge of CO2 physical properties to predict log responses.
- Explain how and why the CO2 plume is monitored using wells.
- Appreciate the general features of wireline logs and how these limit what can be learned from wells.
- Understand the principles and application of pulsed neutron logging tools.
- Design principles for an observation well.
- Design a schedule for running monitoring logs.
- Physical Chemistry of CO2
- Petrophysics for CCUS
- Capillary Pressure for CCUS
- Monitoring CO2 plumes in the subsurface
- Pulsed Neutron Logs