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EARTHWORKS reservoir
3D Seismic Volume Detuning

DT-AMP

Earthworks is pleased to announce a remarkable new product DT-AMP™ DT-AMP™ is a new and novel post-inversion processing product suitable for applying to relative/coloured impedance or deterministic inversion results. DT-AMP™ is designed to remove residual amplitude/thickness tuning effects that will be present in relative/coloured or deterministic inversion. DT-AMP™ may be applied to any pre- or post-stack inversion output or to the results of EEI inversion, or reflectivity data after integration to bandlimited impedance. DT-AMP™ offers a number of advantages over conventional inversion products: • Amplitude de-tuning is performed allowing extracted amplitudes to be used more reliably during seismic interpretation. By removing thickness effects, the visible amplitudes can be directly interpreted in terms of litho-facies or property changes. • Multiple products are supplied, with and without tuning corrections, allowing rapid comparison of results with just single interpretation horizon picks. Thicknesses, in time or depth, together with Seismic Net:Gross and sand thickness estimates are also immediately available as attributes on the workstation. • Amplitude extraction is rapid for the interpreter as picking is more robust and only a single pick (not a top and base zero crossing) is required in order to display amplitudes and de-tuned amplitudes or seismic net pay or sand thickness estimates. • Relative/coloured and deterministic inversion seismic cubes are not suitable for input as seismic conditioning for reservoir models due to tuning. By processing with DT-AMP™, the volumes are detuned and ready for reservoir model conditioning directly, in 3D, without the need for generating 2D seismic property maps picked between zero crossings and subsequently detuned. Our DT-AMP™ workflow can be applied with or without well calibration data, can be applied to existing inverted volumes supplied by the client or can added to our existing workflow and services to provide additional value added products toany relative/coloured or deterministic inversion processing. DT-AMP v3.2 New Features: New density plotting on amplitude – thickness crossplots allows the user to see the density of clustered point data in the crossplot viewer. This makes for more detailed analysis and assists in identifying potential DHI anomalies through simultaneously inspecting amplitude dimming/brightening and velocity decrease. A suite of bandwidth curves have been added so that the user can build a tuning curve from both modelled data as well as empirically fitting the curve. This allows for a smoother and less biased curve to fit to the events, especially for the thicker event in the tuning profile. New ‘probes’ act as filters on the crossplot so that the user can display only points that intersect a selected horizon or for a map based polygon. These could for example allow you to see where your seismic DHI sits on the crossplot. New interactive highlight tools in the crossplot. Highlight on a range of larger thickness, amplitude or constant rock property curves (derived from the tuning curve profile). Select this data on the crossplot and see where it is located on your map and seismic viewers. Article published by Geo ExPro Issue 5 October 2015

So you’ve run your inversion? Have you detuned it? 

We hope you found this overview of DT-AMP™ interesting and useful. If you have any further queries or wish to find out about the software release status, licensing or pricing please send an e-mail to:                                                    or call +44 (0) 1722 343 990
Input Coloured Impedance ( hard sands in purple )
Detuned Coloured Impedance
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