R. Pevzner

The use of depleted gas fields for CO2 storage as well as CO2-based enhanced gas recovery are of global importance. Thus, the CO2CRC Otway Basin Pilot Project provides important experience in establishing whether such scenarios can be monitored by geophysical techniques, in particular seismic time-lapse methodology.Injection of CO2 into a depleted gas reservoir (with residual gas in the Otway case)

Abstract The CO2CRC Otway Project conducted under the Australian Cooperative Research Centre for Greenhouse Gas Technologies is the first of its kind, where CO 2 is injected into a depleted gas reservoir. The use of depleted gas fields for CO 2 storage and or enhanced ...

ABSTRACT In this study, we have presented a workflow to analyze the uncertainties related to the estimation of orthorhombic anisotropy parameters from P-wave slowness data that can be measured in a 3D VSP experiment. We have also presented an example of orthorhombic parameter estimation and associated uncertainties from a 3D VSP dataset in Otway basin, Australia.

ABSTRACT Hard rock seismic exploration normally has to deal with rather complex geological environments. These types of environments are usually characterized by a large number of local heterogeneities (e.g., faults, fracture zones, steeply dip interfaces). The seismic data from such environments often have a poor signal to noise ratio because of the complexity of hard rock geology. In such situations, the processing algorithms that are capable of handling data with a low signal/noise ratio are essential for a reflection seismic exploration. In this paper we describe a modification of the 3D Kirchhoff post-stack migration algorithm that utilizes coherency attributes obtained by the diffraction imaging algorithm in 3D to weight or steer the main Kirchhoff summation. We apply the method to a 3D synthetic model with a presence of high level of random noise; and test the algorithm on the 3D seismic volumes acquired at a mine sites located in Australia.