Tracking buried ancient rivers with 3D Seismic MOL Plc., Exploration and Production Division Exploration projects, MOL Tamás György Krusoczki and Marcell Lux HC exploration geologists ISZA 2013, Békéscsaba, 2013.04. 5-6.

Contents of presentation Some information about „Time Slice” on 3D seismic data cube Practical examples from real world „Alone” river Time slices animation Interpretation and Visualization(Surfer) Incised Valley(4xGut) Time slices Cross section Riverbed analysis Animation Amplitude analysis Complex floodplain (Time slices animation) Summary

„Time Slice(s)” What is this? Source of picture: internet

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Visualization Riverbed(1. Step)

Visualization Riverbed(1. Step)

Visualization Riverbed(2. Step)

Visualization Riverbed(2. Step)

Analogy Source of picture: internet

Analogy Source of picture: internet

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Cross section (Incised Valley(s)) Riverbeds

Analogy Source of picture: internet

Analogy Source of picture: internet

Seismic Interpretation(By hand) Source of picture: internet

Seismic Interpretation(By Comp.) Source of picture: internet

3D visualization

3D visualization

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Interpretation Source of picture: internet

Interpretation Source of picture: internet

Amplitude Analysis (Above 24ms, Below 0 ms) Average Reflection Strength Amplitude Analysis (Above 24ms, Below 0 ms) Source of picture: internet

Amplitude Analysis (Above 24ms, Below 0 ms) Maximum Trough Amplitude Amplitude Analysis (Above 24ms, Below 0 ms) Source of picture: internet

Amplitude Analysis (Above 24ms, Below 0 ms) Average Instantaneous Phase Amplitude Analysis (Above 24ms, Below 0 ms)

Amplitude Analysis (Above 24ms, Below 0 ms) Average Instantaneous Phase Amplitude Analysis (Above 24ms, Below 0 ms)

Amplitude Analysis (Above 24ms, Below 0 ms) Average Instantaneous Phase Amplitude Analysis (Above 24ms, Below 0 ms)

Why doesn’t it work? Because rivers of my presentation are Too thin Too flat No significant change of seismic wave velocity and density Sand-sand instead of sand-clay formation Seismic resolution λ/4 resolution Not constant, depend on vertical depth and velocity We can do „blueing” to improve resolution More finest seismic wave Less „long” seismic wave

Source of picture: internet TWT: 1196 1196 ms Complex system

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Summary Conception Time Slices & Imagination Seismic sections Confidence Amplitude analysis Conception Geology principals Admiration

„Perfect” Example Source of picture: Visualization of Horizon Attributes By Geoffrey A. Dorn

Thank You for Attention! Source of picture: http://www.zazzle.com/geologists_geology_evolution_rockhound_geological_bumper_sticker-128098345464248945