OpendTectis an open source seismic interpretation software system forprocessing, visualizing and interpreting multi-volume seismic data, andfor fast-track development of innovative interpretation tools.
Features

Horizon tracker
The new horizon tracker features various modes:

* In auto-track mode the surface grows automatically within a userspecified tracking area. The tracker can be controlled by amplitudeonly, by a step-wise amplitude difference and by similarity(cross-correlation). The stepwise tracker first tracks the areas thathave a minimal amplitude difference with the picked seeds and allows fora greater difference in subsequent steps. This results in a much betterhorizon which requires less editing.
* In line tracking mode theuser makes an interpretation on inlines and crosslines. On the elementsseeds are made and in between seeds an event is tracked orinterpolated.
* The tracking software supports various featuresfor editing tracked surfaces. Areas can be removed from the surface andre-tracked after picking new seed points, or changing trackingparameters. Holes in the data can be filled automatically with variousinterpolation algorithm.

Visualizing 2D and 3D seismic data
OpendTects3D viewer supports visualization of seismic sections (inlines,crosslines, time-slices), random lines, 2D lines, horizons, faults,wells (tracks, markers, stratigraphy, logs), objects, polygons andpicks, volume rendering, and pre-stack gathers. Seismic data can also bedisplayed in separate 2D viewers. Several commercial plugins offeradditional visualization capabilities & viewers (e.g. theHorizonCube allows sliding through a dense set of horizons, The WellCorrelation Panel (v4.2) supports a dedicated 2D viewer, as doesSpectral Bluing and Colored Inversion (v4.2)).

The main ideabehind the 3D interface is that seismic interpreters must be able toquickly scan through multiple volumes of data and combine information toget the optimal view of any geological feature of interest. For thisreason, data processing and visualization are rigorously integrated inthe system.

Visualization elements can be moved freely throughdata space to interactively analyse data from stored volumes, or datacalculated on-the-fly. Visualization elements include slices (inlines,crosslines, timeslices), horizons, random lines and cubes. For betterinterpretation of the data and analysis results, OpendTect supportsvolume rendering and stereo viewing.

Seismic Attributes

Attribute-set

* Various attributes and filters like Energy, Frequency, Similarity,Instantaneous, Band pass filters, Absorption quality factor etc¦
* Spectral Decomposition with Fourier transforms and Continuous Wavelet transforms
* Mathematical and logical expressions to create your own attributes and filters
* Movie-style parameter testing ( time gate or step out) to quickly find the optimal settings for your attributes

Attributes List

* Convolve -- Attribute that returns a filtered response
* Delta Resample -- Attribute that enables residual alignment of seismic volumes
* Energy -- Attribute that returns the energy of a trace segment
* Event -- Attribute that quantifies an events shape or distance relative to a next event
* Fingerprint -- Attribute that computes the similarity between auser-defined vector of attributes and the equivalent vector taken ateach position in a cube.
* Frequency -- Attribute that returns frequency properties
* Frequency Filter -- Attribute that returns filtered data using FFT or Butterworth filter types
* GapDecon -- Attribute that aims to attenuate repetitions of primary reflections (multiples).
* Horizon -- Attribute that enables advanced calculations on horizons
* Instantaneous -- Attribute that returns an instantaneous attribute
* Match Delta -- Attribute that extracts time shifts between similar events in different seismic volumes
* Mathematics -- Attribute that returns the result of a user-defined mathematical expression
* Position -- Attribute that returns any attribute calculated at thelocation where another attribute has its minimum, maximum or medianwithin a small volume.
* Prestack attribute -- This attribute enables you to load, display, use and manage pre-stack data
* Reference -- Attribute that returns the definitions of the extraction position
* Reference shift -- Attribute that moves the extraction position in 3D space
* Scaling -- Attribute used for scaling of amplitude
* SEG-Y checklist -- SEG-Y loading checklist
* Similarity -- Attribute that returns trace-to-trace similarity properties
* Spectral decomposition -- Attribute that returns the amplitude spectrum (FFT) or waveletcoefficients (CWT)
* Velocity Fan Filter -- Attribute that returns energy with apparent velocities inside a specified Min/Max range.
* Volume statistics -- Attribute that returns statistical properties

Plugin - Attributes

* Attributes with steering
o Curvature
o Dip
o Dip angle
o Position
o Reference shift
o SimilarityVolume Statistics

* SSB
* SCI
* MPSI
o 3D Model builder (Wells and Zones)
o 2D Error grid
o Deterministic Inversion
o Stochastic Inversion
o Utilities

* Default attribute sets
o Evaluate Attributes
o dGB Evaluate Attributes
o NN Chimney Cube
o NN Fault Cube
o NN FaultCube Advanced
o NN Salt Cube
o NN Slump Cube
o Unsupervised Waveform Segmentation
o Ridge-Enhancement Filter
o Dip-Steered Median Filter
o Dip-Steered Diffusion Filter
o Fault Enhancement Filter
o Fault Enhancement Attributes
o Seismic Filters Median-Diffusion-Fault-Enhancement