TomoXPro. Crosshole Survey Design, Modeling, Data Processing, Tomography, and Migration

Transcription

1 TomoXPro Crosshole Survey Design, Modeling, Data Processing, Tomography, and Migration

2 TomoXPro Complete Crosshole Seismic Application Crosshole survey design for complex geology Synthetic and wavefield simulation Raytracing for direct, reflections, and conversions Nonlinear tomographic imaging Data processing Pre-stack migration

3 Survey Design and Modeling Jointly developed by GeoTomo and Baker Hughes Building complex model easily Raytracing and full wavefield simulation valid for any complex structures Software development - a successful case of simultaneous engineering

4 Model Building Example

5 Model Building Example

6 Model Building Example

7 Model Building Example

8 Model Building Example

9 Model Building Example

10 Model Building Example

11 Model Building Example

12 Model Building Example

13 Model Building Example

14 Model Building Example

15 Model Building Example

16 Ray Tracing Example

17 Ray Tracing Example

18 Ray Tracing Example

19 Ray Tracing Example

20 Ray Tracing Example

21 FD Wavefield Snapshot

22 FD Wavefield Snapshot

23 FD Wavefield Snapshot

24 FD Wavefield Snapshot

25 Flow of Tomography Method First Break Picks Initial Velocity Model Raytracing Travel Time Inversion Update Model Final Tomographic Velocity Model

26 GeoTomo s Nonlinear Tomography Forward: Rapid wavefront raytracing Combining eikonal solver and graph method No sorting involved Inversion: Continuum inverse theories Fitting continuum data and continuum model Independent of starting model

27 GeoTomo s Tomography Users Saudi Aramco ExxonMobil Unocal Baker Hughes OYO Geospace TomoSeis M.I.T.

28 Synthetic Example

29 Synthetic Example

30 OYO Geospace Orbital Vibrator P- and S-Wave Sources, Three-Component Receiver

31 Case History Michigan Basin

32 Case History Imaging Fracture Zone, Italy TomoSeis Acquired Data, GeoTomo Processed Data

33 Case History Image Buried Concrete This is a geophysical engineering application. A concrete object was buried under a paved road. Crosshole imaging between two holes with 30-feet separation was performed to locate the object. Golder Associates performed field work and tomographic imaging with TomoXPro

34 Data PreProcessing Band-pass filter remove noise Median filter remove tube waves Floating filter remove vibrator ghosts Muting remove first arrivals

35 Complex Structure Synthetic Model 10,000 fps 10,500 fps 9,500 fps

36 Reflection Migration

37 Prestack Migration 1 Shot Kirchoff Migration Poststack

38 Prestack Migration: Vertical Reflector

39 Prestack Migration: Horizontal Reflector Faults

40 TomoXPro Summary Survey design and modeling Raytracing and tomography Data pre-processing Migration

41 TomoXPro New Features Windows 64-Bit New Picker with Tracker and Fully Automatic Picker New Pre Process with CSG, CRG, Common Mid-Depth (CMD), and Common Interval Depth (CID) Options, Upgraded Signal Processing Modules, and Allowing Users to Select Any Function in Any Sequence Improved Migration Algorithm with Antialiasing Filter, Diffraction Imaging Weighting, and Source Compensation New Time-Lapse Traveltime Tomography Time-Lapse Processing between Baseline and Monitor Surveys Improved Post Process with Added Modules Improved Raytracing with Multi-Component Options