Novel orbital seismic sources at a CO2 storage monitoring site, Newell County, Alberta

Novel orbital seismic sources at a CO2 storage monitoring site, Newell County, Alberta

ABSTRACT

Time-lapse seismic surveys are often performed on large time scales and can suffer from repeatability problems arising from variations in source and receiver geometries. Novel orbital seismic sources have been developed and were permanently installed along with a permanent receiver array at a small carbon sequestration site in Newell County, Alberta. Baseline datasets encourage the use of these sources in conjunction with both geophone and fibre optic receivers by confirming the relationship between signal to noise ratio and source effort. Initial testing of the sources indicates promising transfer of the theoretical source signature through the subsurface to surface receivers. Due to the absence of a measurement of the true source signature, pre-processing workflows were developed incorporating pilot trace correlation and Gabor deconvolution. Resultant corridor stacks are comparable to baseline datasets. Testing of surface vibrator sources reveal severe issues with the current source deployment.

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