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The Impact of Time-shift Estimation and Correction on Two 4D Attributes - Amplitude Difference and Velocity Change
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
Summary
4D seismic data can provide valuable insights to the reservoir and non-reservoir interpretation. Seismic attributes like amplitude difference and velocity change are commonly used to perform such task. All these attributes are computed after correlating monitor and base datasets, where time-shifts are observed. The technique responsible to correlate monitor and base amplitudes is called warping. In this study we apply the warping technique defined in Hale (2009) to the Norne field benchmark case. We investigate how uncertainties related to the choice of parameters used in Hale’s method impact on the time-shifts computation and in two 4D seismic derived attributes: amplitude difference and velocity change. We show that the time-shifts computation and the amplitude difference after time-shift correction are robust when considering different parameter values, while the results of velocity change are affected by the parameter choice.
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