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Abstract

Summary

A key task in 4D seismic analysis is to resolve changes in subsurface velocity ΔV/V that affect both imaging in the monitor data and our interpretation of time-lapse amplitudes. This study introduces a new approach to recover ΔV/V using a Gaussian mixture model. The Gaussians are found to be better representative of the property fields than other choices such as B-splines. This approach is tested by application to a North Sea field, where geomechanical effects are active. Recovery of ΔV/V from three different time-shift estimates, using three approaches is firstly compared with Gaussian reconstruction. A second comparison estimates ΔV/V directly from the trace data. In these tests, the new approach compares favourably in the presence of noise, and is relatively simple to implement.

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/content/papers/10.3997/2214-4609.201701204
2017-06-12
2024-04-19

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References

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201701204
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Estimation of Time-Lapse Velocity Changes Using Gaussian Reconstruction
Conference Proceedings 2017, 1 (2017); https://doi.org/10.3997/2214-4609.201701204
/content/papers/10.3997/2214-4609.201701204
/content/papers/10.3997/2214-4609.201701204
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