Atmospheric tomography as a tool for quantification and localisation of CO2 emissions: Otway Stage 2B  

Authors / CoAuthors

Kuske, T.J. | Jenkins, C.J. | Feitz, A.J. | Zegelin, S.

Abstract

Abstract for a Poster for the CO2CRC Symposium 2013: Atmospheric tomography is a CO2 quantification and localisation technique that uses an array of sampling points and a Bayesian inversion method to solve for the location and magnitude of a CO2 leak. Knowledge of a normalized three-dimensional dispersion plume is required in order to accurately model a leak using many meteorological parameters. A previous small scale (~20 m) study using a high precision Fourier Transform Infrared found that the emission rate was determined to within 3% of the actual release rate and the localisation within 1 m of the correct position. The technique was applied during the CO2CRC Otway Stage 2B residual saturation and dissolution test in August-October 2011. A network of eight independent CO2 sensors (Vaisala GMP343 CO2 probes) were positioned at distances ranging from 154 to 473 m from the well. A 3D sonic anemometer within the measurement area collected wind turbulence data. The results of the study indicate that, through careful data processing, measurements from the reasonably inexpensive (but lower accuracy and lower precision) CO2 sensor array can provide useful data for the application of atmospheric tomography. Results have found that the low precision of the sensors over time becomes a problem due to sensor drift. A reference measurement of CO2 helps to resolve this problem and improves the perturbation signal during data processing. Preliminary inversion modeling results will be shown to show the best estimation of locating a CO2 leakage source for the Otway Stage 2B residual saturation and dissolution test. CO2CRC Symposium 2013, Hobart

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nonGeographicDataset

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77045

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Keywords

• External PublicationAbstract

( Theme )

• atmosphere

( Theme )

• environmental

( Theme )

• geological storage of CO2

Australian and New Zealand Standard Research Classification (ANZSRC)

• Atmospheric Sciences

• Published_Internal

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2013-01-01T00:00:00

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environment

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CO2CRC Symposium 2013, Hobart