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Multi-Sensor Microseismic Monitoring of the Quest CCS site, Alberta, Canada

Description: 

Nowadays, Carbon Capture and Storage appears as one of the solutions to reduce the amount of CO₂ in the atmosphere. At the Quest CCS site in Alberta, Canada, injection of CO₂ started in 2015 with one million tonnes per year and ongoing until 2040. Microseismic monitoring has been part of the MMV plan since the beginning of the project, aiming to mitigate the potential risks associated with the injection. The closer area around Quest has been seismically quiet before injection operation started. A string of eight 3-component geophones was installed in a deep monitoring well. In addition, 153 surface nodes arranged in mini-arrays were temporarily deployed and a DAS cable installed in one of the injection wells was interrogated during a period of six months.

More than 600 microseismic events of magnitude ranging from -2 to 0.8 were detected and located within the area of review. All events have been located in the Precambrian basement below the reservoir causing no containment threat. This rich dataset allows for the comparison of the different monitoring technologies against each other both in terms of detectability and locatability of events. We demonstrate how signal processing and array processing techniques can significantly lower the event detection threshold. Event location uncertainties can be reduced by combining various data.

Session: Induced Earthquakes: Source Characteristics, Mechanisms, Stress Field Modeling and Hazards - III

Type: Oral

Date: 5/1/2024

Presentation Time: 02:45 PM (local time)

Presenting Author: Nadège

Student Presenter: No

Invited Presentation: 

Authors