Which Python libraries are required for this skill?

The workflow relies on several specialized libraries: lasio and welly for well log management, bruges for rock physics and AVO equations, and segyio for seismic data handling.

Does this skill support AVO classification?

Absolutely. It calculates intercept (R0) and gradient (G) values to help you classify seismic anomalies into standard AVO Classes I, II, III, or IV.

Can I perform analysis if I am missing a shear sonic (Vs) log?

Yes, the skill includes implementation patterns for estimating Vs from Vp logs using empirical relationships like the Castagna mudrock line or Greenberg-Castagna methods.

How does it handle Gassmann fluid substitution?

The workflow provides a step-by-step process: calculating dry rock moduli, performing the fluid replacement (e.g., brine to gas), and updating the saturated bulk modulus and density to predict new seismic velocities.

Rock Physics & AVO Workflow

Name: Rock Physics & AVO Workflow
Author: SteadfastAsArt

bySteadfastAsArt

•

データサイエンスとML

Performs end-to-end rock physics analysis and AVO feasibility studies using specialized geoscience Python libraries.

The Rock Physics & AVO Workflow skill provides a structured pipeline for geophysicists and data scientists to conduct comprehensive seismic reservoir characterization. It automates the transition from raw well log preparation (LAS/DLIS) to advanced elastic property calculation, Gassmann fluid substitution, and AVO modeling. By orchestrating tools like bruges and lasio, it enables users to predict seismic responses to fluid changes, classify AVO anomalies (Classes I-IV), and generate synthetic seismograms for precise well-seismic ties, making it an essential tool for exploration prospecting and quantitative interpretation.

主な機能

01Gassmann fluid substitution for seismic fluid replacement modeling

02AVO response modeling using Shuey and Zoeppritz equations

03Automated well log loading and QC using lasio and welly

04Synthetic seismogram generation with wavelet extraction

0512 GitHub stars

06Comprehensive elastic moduli and impedance calculations

ユースケース

01Predicting seismic amplitude changes during reservoir production

02Optimizing well-seismic ties for structural and stratigraphic interpretation

03Performing AVO feasibility studies for exploration prospects

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add steadfastasart/geoscience-skills rock-physics-avo

For use in Claude.ai and ChatGPT

Download Skill