Deliverable 3.7: Report on field data assessment and sensitivity
Research report
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Date
2024-12-12Metadata
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- NGI report [224]
Abstract
In our last deliverable report (DV3.5) as part of WP3 of SHARP, we discussed experimental results of laboratory triaxial deformation experiments and how coreplugs collected from different reservoir complexes in the North Sea behave mechanically and tied them with timelapse ultrasonic attributes. In this deliverable report, we are focusing on the implication and applicability of those outcome (in DV3.5) to ensure safe disposal of CO2 in a reservoir scale. We try to find out the petrophysical properties of reservoir rocks which influences the degree of velocity change and how those can be incorporated to develop a robust traffic light system to predict and in some cases, forecast stress change in the reservoir during CO2 injection. A crack development model is also proposed by benchmarking stress data with acoustic data during different stages of triaxial experiments, which might have wider applicability beyond CO2 storage applications. Finally, we conducted some novel triaxial tests to emulate CO2 injection in a critically stressed reservoir rock to see how the ultrasonic properties change in due course. We further compared the ultrasonic velocity change with acoustic emission measurements in some tests and found a very strong correlation between them. Insights presented in this deliverable report will directly be useful for developing monitoring strategies for future CCS projects in the North Sea and beyond.
Series
NGI-rapport;20210518-D3-7SHARP Storage;Deliverable 3.7