Amplitude vs Frequency: Finding Hydrocarbons Without Going Pre-Stack AVO (Amplitude vs Offset) Intercept × Gradient is a well-established technique in seismic exploration for hy...
Amplitude vs Frequency: Finding Hydrocarbons Without Going Pre-Stack
AVO (Amplitude vs Offset) Intercept × Gradient is a well-established technique in seismic exploration for hydrocarbon detection. However, its reliance on carefully processed pre-stack gathers often limits practical application.
In 2021, Mandong et al. introduced an alternative post-stack approach: AVF (Amplitude vs Frequency) Intercept × Gradient. This method leverages a key property of seismic wave propagation in hydrocarbon-bearing reservoirs—higher frequencies attenuate more rapidly than lower ones. By applying spectral decomposition and computing Intercept × Gradient on frequency components, AVF captures this diagnostic energy loss without the need for pre-stack data.
Recently, a client asked if OpendTect supports AVF analysis. We were proud to say: Yes, it does!
This reflects OpendTect’s versatility and advanced functionality: 🌍Full support for spectral decomposition 🌍Pre-stack AVO attribute calculations 🌍Workflows for Intercept × Gradient from post-stack, multi-component data
👉The short video attached demonstrates the full workflow and a practical example on a pre-stack dataset.
dGB Earth Sciences #OpendTect #geology #geophysics #seismic
