High resolution seismic survey of the proposed Beenyup wastewater injection site

Abstract

The Beenyup wastewater treatment plant is situated in close proximity to residential properties approximately 20 km north of the central business district of Perth, Western Australia. It is proposed that treated wastewater from the plant will be injected into the sub-surface in preference to releasing it to the ocean. In order for this to occur over a long period of time a good understanding of the connectivity of the sub-surface aquifers in the vicinity of the injection site is required. High resolution surface seismic together with vertical seismic profiling data were collected at the site using a high-power impact source. The resulting sub-surface images correlate well with geophysical well-logs and clearly show the injection zone and confining seals.