March 16 - 31, 2020

RokDoc Rock Physics - Course

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Course Outline:

Intended for new and intermediate users who require an introduction to RokDoc and the rock physics theories behind the software. Delegates are guided through a typical RokDoc workflow, comprising data loading and QC, predicting missing data with calibrated rock physics models, blocky modeling, log-based rock physics analysis and 2D forward modeling.
Course Location
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What is RokDoc & an introduction to Rock Physics
  • What is Rock Physics?
  • A RokDoc Workflow
Workflow 1 – Project Management
  • File management
  • Configuring RokDoc
  • Global Settings
  • User Settings
  • Shortcuts
  • Plugins
  • Project level data
Workflow 2 – Creating Fluid Sets
  • Calculating fluid properties
Workflow 3 – Importing Well Data
  • LAS loading
  • Log Data
  • Markers
  • Deviation surveys
  • Checkshots
  • Discrete data
  • Importing data from RokDoc projects
Workflow 4 – Well Viewer
  • Launching the Well Viewer
  • Configuring the display
  • Right-click options
  • Color Fills
  • Working Intervals
  • Creating and using well Views
Workflow 5 – Domain Transforms
  • TVD to TWT conversions
  • QC’ing the depth-time curve
Workflow 6 - Cross-plotting
  • Launching the Cross-plotter
  • Overlays
  • Polygons
  • Data QC in cross plotter
  • Calibrating trend lines and rock physics models
Rock physics essentials
  • Data acquisition
  • Seismic essentials
  • Elastic properties and moduli
  • Density and Vs prediction
Workflow 7 – Vs Prediction
  • Creating Volume Fraction Sets - Minerals
  • Creating Saturation Sets - Fluids
  • Vs Prediction- Greenberg Castagna
  • Vp-Vs-Rho Sets
  • Case study
Workflow 8 – RHOB Prediction
  • Rho prediction - The Gardner Model
  • Vp-Vs-Rho Sets
Introduction to the Log Calculator
  • Basic functionality
Introduction to the User Programmer
  • Writing and running programs
Workflow 9 – Deriving Averages
  • Deriving averages for use in single interface models and mineral sets
  • Using working intervals and cut-offs to derive averages
Workflow 10 – Blocky Operations – AVO and Gassmann
  • Principles of AVO
  • Blocky AVO single-interface models
  • Gassmann Fluid Substitution
  • Fluid and mineral mixing
  • Elastic Bounds
  • Limitations
  • Performing blocky fluid substitutions in RokDoc
Workflow 11 – Log Fluid Substitution
  • Log Operations
  • Fluid Substitution
  • Shaley Sand Gassmann
  • Dry Rock Modeling
Workflow 12 – Loading and Viewing Seismic Data
  • Importing SEG-Y volumes
  • Importing horizon data
  • Inline and Crossline Viewers
  • Viewing time slices
Workflow 13 – Synthetic Gathers, Log Elastic Properties and Log Filtering
  • Backus Averaging
  • Creating a statistical wavelet
  • Synthetic gather generation
  • Gather manipulation
  • Gather Analysis
  • Log elastic properties
  • Angle dependent properties
  • Angle independent properties
  • Log Filtering
Workflow 14 – Advanced Cross-plotting
  • Matrix cross-plotting
  • Single-well and multi-well cross-plotting
  • Trend Lines and Overlays
  • Histogram Plot
  • Rose Diagram
  • Inversion Feasibility studies
  • Weighted stack cross-plotting
Workflow 15 – Wavelet Estimation
  • Defining wavelet estimation inputs
  • Extracting deterministic wavelets
  • Wavelet QC and editing
Introduction to RokDoc 2D
  • Resolution, interference and tuning
  • Bright, flat and dim spots
  • Navigating in RokDoc 2D
Workflow 16 – Tuning Model
  • Creating a Simple Tuning Wedge
  • Creating and filling bodies
  • Manipulating model parameters
  • Measuring attributes
  • Changing body properties
Workflow 17 – One Well Layer Cake Model
  • Creating a Simple Layer Cake Model
  • Left-to-right Filtering
  • Fluid Substitution
  • Porosity Perturbation
  • Calculators
  • Adding Noise
  • Creating pseudo-wells
Workflow 18 – Model from Seismic
  • Bringing Seismic into RokDoc 2D
  • Creating and editing horizons
  • Bulk shifts, stretch and squeeze
  • Measuring attributes
  • Bayesian Classification
  • Weighted Stack Projections
Workflow 19 – Multi-Well Model from Seismic Backdrop
  • Building the model
  • Using more than one well
  • Importing backdrops
  • Re-positioning wells and markers
  • Digitizing geologically consistent events
  • Perturbing the model

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