Rock Physics

Seismic Methods
By OgbonLab

From grains and fluids to velocity: choose the model, bound the answer, calibrate it to the rock.

The physics that links rocks to seismic: elastic bounds, fluid properties, Gassmann substitution, granular and inclusion models, and calibration to a real well, ending in a Rock Physics Lab where you compose a rock and predict its velocities.

3 parts 16 sections Free, browser-native
Start reading → First up: Why Rock Physics? The Missing Link

Table of contents

Every section is a working session: text, math, code, interactive widgets. Click any title to jump in.

Part 0: Part 0: The Bridge

  1. Why Rock Physics? The Missing Link
  2. Velocity Is a Model
  3. The Rock Physics of a Reflection
  4. Scales and Frequencies
  5. The Toolkit Map

Part 1: Part 1: Elasticity and the Moduli

  1. Stress, Strain, and Hooke's Law
  2. The Moduli That Matter
  3. From Moduli to Velocities
  4. Poisson's Ratio and Vp/Vs
  5. The Minerals

Part 2: Part 2: Bounds and Mixtures

  1. The Mixing Problem
  2. Voigt and Reuss
  3. The Hill Average
  4. Hashin-Shtrikman
  5. Bounds as Diagnostics
  6. Critical Porosity

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