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Synthetic Simulation of Surface and VSP Distributed Acoustic Sensing (DAS) Over CO2 Storage Site, Browse Basin
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Asia Petroleum Geoscience Conference and Exhibition (APGCE) 2024, Nov 2024, Volume 2024, p.1 - 5
Abstract
Summary
We have demonstrated that we can achieve consistent simulation synthetic to produce reasonably consistent synthetic surface and DAS VSP strain rate data thorugh series of forward modelling. This gives confidence mat DAS imaging is consistently being modelled, as the ExploreDAS GUI software used to create DAS synthetic data for arbitrary geological model. This is useful to design and strength understanding regarding further data acquisition and processing for both surface and DAS VSP. The simulation system considers DAS response compared to geophone and properly created migrated image with that data. However, through this analysis we identified some differences in terms of capabilities of forward modelling method; migration algorithm, noise limitation, and velocity options. The Synthetic model used P-wave DAS strain rate response mat was able to equalize with geophone in terms of single trace and migrated imaged. Furtherly, in full paperwork model was able to assess gauge length efffect and simulate noise mat might happen in actual DAS acquisition at offshore subsurface features in certain SNR. The major benefits of ExploreDAS simulation software, mat supports quite sufficiendy creating subsurface structures, fiber geometry, and shot locations properly even with very complex geological conditions such as this synthetic Browse basin CO2 storage site.
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