Modelling of Depth Dependent 3D Time-Lapse Seismic Noise

M. Alajmi¹, A. Bona², and R. Pevzner²

Abstract

One of the first on-shore projects in the world of CO₂ sequestration is located on-shore in Australia, Victoria. This is the Otway project of Cooperative Research Centre for Greenhouse Gas Technologies (CO₂CRC) that has been divided into two stages. Since the detectability of a plume is given by the signal to noise ratio, the ability to model a realistic time-lapse noise plays a crucial role in any feasibility study.

There are two possible approaches to modeling time-lapse noise. The first approach is based on detailed understanding of all possible noise types in seismic data and their effect on time-lapse signal. The second approach is an empirical one, where the time-lapse noise model is based on observed time-lapse data and we will focus in this work on this type of the modeling. This is possible, since we have two 3D time-lapse data available from stage I of the Otway project.

AAPG Search and Discovery Article #90188 ©GEO-2014, 11th Middle East Geosciences Conference and Exhibition, 10-12 March 2014, Manama, Bahrain