Geophysical Insights at EAGE 2017 in Paris, Booth #350
Rocky Roden and Ching Wen Chen in May edition of First Break - Interpretation of DHI Characteristics using Machine Learning
Deborah Sacrey wins the 2016 RMAG Best Speaker Award
Seismic interpretation and machine learning by Rocky Roden and Deborah Sacrey, GeoExPro, December 2016
Deborah Sacrey Speaking at the CAPA Technical Symposium, November 4, 2016
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Workflow Page Banner V2.jpg

Seismic Interpretation l Machine Learning for Attribute Analysis


  

  

   

 

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Seismic Interpretation l Machine Learning for Attribute Analysis


  

  

   

 

Guided Workflows: A Step-by-Step Process

Scroll through the steps below to gain a sense of how straightforward Paradise is to use, starting from screens that show how data is loaded in Paradise, and proceeding through the analysis and interpretation process.  While Paradise is a class of learning machines, it has been designed to be used by any interpreter who seeks to obtain greater information from the seismic response.  

Click here to start the tour

Loading SEGY data for Seismic Interpretation


Loading SEGY data for Seismic Interpretation


Load Data & Generate Attributes

 

 
  

Use the new Attribute Generator in Paradise to calculate all your attributes within Paradise for convenient loading.  Leveraging the world-class attributes routines from the AASPI Consortium at the University of Oklahoma, the Attribute Generator produces over 80 attributes types, including amplitude, geometric, and spectral decomposition.  Attributes are straightforward to generate and apply using guided thought-flows in Paradise.

Paradise has been designed to make data import efficient and straightforward.  Once a few parameters are set for the seismic and attribute volumes within a survey, multiple SEGY files can be loaded with a single command.  As the loading proceeds, Paradise creates bricking files called PDM that are designed for fastest processing efficiency.  This is just one example of how data management in Paradise has been optimized to work with all interpretation software packages.  

 

Principal Component Analysis for Analyzing Seismic Attributes


Principal Component Analysis for Analyzing Seismic Attributes


Create a PCA

 

Principal Component Analysis (PCA) is a linear process that helps to determine those attributes that contribute most of the information to the study area.  Use PCA on a superset of attributes to quantify the relative contribution of each attribute based on its variance. 

The attributes within a region analyzed using PCA can be set according to inline, crossline, time range, between horizons, or above and below a horizon.   Constrained around production zones, for instance, PCA can be used to obtain a better understanding of the attributes that highlight geobodies.   Apply PCA before running a Self-Organizing Map (SOM) to distill those attributes that are most meaningful, then run a SOM on those attributes to highlight geobodies.  

 
 

 

Principal Component Analysis for Seismic Interpretation


Principal Component Analysis for Seismic Interpretation


View Results of a PCA

 

PCA produces an Eigenvalue per inline across the user-defined area in the form of a bar chart (top) and a set of Eigenvectors (bottom left) that indicate the direction and magnitude of greatest variance among the set of attributes.  Each Eigenvalue reflects the extent of variance of the set of attributes in the PCA and can be selected at any inline to reveal its corresponding set of Eigenvectors.  The chart at the top can be used to understand how the variance among the selected set of attributes changes across the survey. 

Select each Eigenvector to expose the relative contribution of each attribute for that Eigenvector, as shown in the chart on the lower right.  In this way, use the PCA process to quantify those attributes that are most significant to the region prior to running a SOM.  Often, the first and second Eigenvectors are most significant to the geology.  

 

 
  

 

Self-Organizing Maps for Seismic Interpretation


Self-Organizing Maps for Seismic Interpretation


 

Create a SOM

 
 

The SOM process is a powerful, non-linear data classification process that is sensitive to subtle changes in the volume.   Using the straightforward, left-to-right guided workflows, run multiple SOM’s with different configurations to analyze the region in detail. 

A good practice is to run a SOM having a 5X5, 8X8 and 10X10 neural map to see how classification results change at different resolutions, i.e., 25, 64, and 100 classes of data respectively.  Since Paradise is both a batching and interactive technology, multiple SOM’s can be queued and run while the interpreter is away.   Use the Task Manager with Paradise to set job priorities and the number of processors to be dedicated to Paradise. 

 

Visualization of seismic data with a self-organizing map


Visualization of seismic data with a self-organizing map


 

Interpret Results of a SOM

Once the SOM results are available, use the interactive 2D Colormap in Paradise to analyze the results.  The 2D Colormap, which is unique to Paradise, presents a logical map of the classes of data in the Universal Viewer.  Each hexagonal object (neuron) in the 2D Colormap can be selected to highlight the corresponding class of data in the Universal Viewer.  The SOM process can reveal geologic and stratigraphic features, fracture trends and sweet spots in unconventional settings, and direct hydrocarbon indicators (DHI’s) such as flat spots.  The types of features and geobodies revealed depend on the selected attributes analyzed by the SOM process.

Being able to identify/quantify the appropriate attributes for the region and highlight geobodies deserving further investigation promises to accelerate the interpretation process and reduce exploration risk.  And, quantifying the attributes that respond to a given geobody, as shown in the screen on the right, will dramatically alter the interpretation workflow altogether.

 

 

Free Trial of Seismic Interpretation Software


Free Trial of Seismic Interpretation Software


 

Paradise 30-Day Trial

Contact us to explore how the advanced pattern recognition workflows in Paradise can reduce exploration risk and learn more about the Paradise 30-Day Trial.