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RokDoc Rock Physics

Course Outline:

3 Day Course: 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.

This course will cover Gassmann dry rock modeling, elastic log analysis, cross-plotting and well ties. Further analysis is then performed in RokDoc 2D to determine the effects of seismic tuning, fluid substitutions, porosity perturbation and noise.

Show Course Outline
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
Upcoming Schedule
When Where Price  
Instructors for this Course
Tutor Andrew Snowling
Andrew Snowling
Geoscience
Tutor Dr Rob Simm
Dr Rob Simm
Visitor Instructor

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