Abstract
In 2018 TenzorGEO carried out a trial in the North Sea to acquire passive seismic data (LFS – low frequency seismic technology) as part of a blind test with an unnamed operator. The result from the trial is a hydrocarbon probability map showing data informed zones with delineated hydrocarbons. To further test the acquired data and the level of sensitivity of the model used in the analysis, a sensitivity test was performed to assess the level of model misfit and validate the vertical resolution of the technology. The results from the sensitivity tests was able to show how the hydrocarbon probability map will respond to: changes in depth, presence of other hydrocarbon layers within the study area, and the exclusion of sensor observation points should the sensors be affected or damaged during installation. Overall, the tests were able to validate the capability and potential of the LFS technology in identifying and delineating multiple hydrocarbon reservoirs with a predetermined interval spacing between the reservoirs across a field. The sensitivity tests provide an opportunity to test and fine-tune the application of LFS in detecting and delineating deeper structures with potential hydrocarbons and also monitoring CO2 storage reservoirs.
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