Reservoir stress path/interpretation of fault systems

Purpose

• To conduct research related to the reservoir stress path during both depletion and re-pressurisation and apply this knowledge to Naylor Field and Iona Gas Storage Facility. This issue is important in terms of reservoir compaction/expansion, surface movement, failure of intact rock, near wellbore deformation and it is necessary to identify maximum sustainable pressures for fault stability.
• Interpreting fault systems in the eastern Gippsland Basin and assessing impact on tectonic evolution and trap integrity with application to potential carbon dioxide storage sites.

Summary

Better understand the reservoir response to fluid injection by determining the reservoir stress path through:

• Literature review.
• Calculation of the reservoir stress path impact into 2D and 3D fault stability analysis applied to the CO2CRC Otway Project data by developing simple codes in Matlab.
• First activity report to demonstrate that the reservoir stress path is one of the key points to any fault reactivation analysis.

Interpreting fault systems and assessing impact on tectonic evolution and trap integrity via:

• Testing seismic variance cubes.
• Regional seismic interpretation of study area.
• Report writing.