Screen anomalies with RMS amplitude

For a faster way of screening anomalies to confidently interpret your geology, GeoTeric incorporates RMS amplitude calculations in the iso-proportional slicing tool and also allows the creation of a volumetric RMS cube using processes and workflows.  Learn more and follow our step by step guide to c...

Validate Part 2: Fluid Substitution and ...

This is the second part of a two-part (part 1) blog post focusing on ‘Validate’, GeoTeric’s seismic ...

Validate Part 1: Creating a Simple Forwa...

This will be a two-part blog post focusing on ‘Validate’, GeoTeric’s Seismic Forward Modelling modul...

Tips for Enhancing Your Data in GeoTeric

As part of GeoTeric’s Data Conditioning workflow, the Spectral Expression Tool is used to shape your...

How to optimise frequencies in a RGB col...

RGB Blends of Frequency Decomposition results are very powerful in revealing fine details of the sub...

Adaptive Geobodies Part 2 – High Definit...

In the previous Geobodies instalment, a geobody was created using a Standard Frequency Decomposition...

Adaptive Geobodies Part 1 – Standard Fre...

The Adaptive Geobodies tool tool is based on generating delineating geological deposits from data va...

Frequency Decomposition Part 3 - HDFD (H...

The previous two blog posts looked at 'standard' frequency decomposition techniques which applied co...

Frequency Decomposition Part 2 - Constan...

This weeks blog post continues to look at frequency decomposition techniques available in GeoTeric. ...

Frequency Decomposition Part 1 - Constan...

The Standard Frequency Decomposition module uses bandpass filters to carry out decomposition with pr...

Bedform Blends

RGB Frequency Decomposition Blends are extremely useful in identifying both structural and stratigra...

HD Frequency Decomposition Using a Horiz...

High Definition Frequency Decomposition (HDFD) is one of the many unique tools and workflows availab...

Validate Part 2: Fluid Substitution and Rock Properties Settings

Posted by Andrew Pomroy on 25 Jul 2018

This is the second part of a two-part (part 1) blog post focusing on ‘Validate’, GeoTeric’s seismic forward modelling module that recently became available with the release of 2018.1. The tool is meant for interpreters to be able to easily test hypotheses by creating models that can be matched back to frequency decomposition results as well as reflectivity data.

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Topics: Blog, Validate, GeoTeric 2018.1, Fluid Substitution, test hypotheses, Frequency Decomposition, Forward Modelling

Validate Part 1: Creating a Simple Forward Model to Test Depositional Scenarios

Posted by Andrew Pomroy on 13 Jul 2018

This will be a two-part blog post focusing on ‘Validate’, GeoTeric’s Seismic Forward Modelling module that recently became available with the release of 2018.1. The tool is intended for interpreters to be able to easily test hypotheses by creating models that can be matched back to frequency decomposition results as well as reflectivity data.
This week’s post works through a simple example of testing a hypothesis using Validate. In the next post, we will go over some more advanced topics.

We begin by focusing on the Eskdale reservoir in offshore Australia’s Exmouth Basin. This field is comprised of deepwater channel sands compartmentalized by faults. We’ll be looking at the first exploration well, Eskdale-1 (Fig. 1), which found only residual oil in a 75-meter-thick sand package.

Figure 1: Gamma Ray and acoustic logs over the Eskdale reservoir in the Eskdale-1 well. Note the change in acoustic impedance at the “Intra_reservoir” marker.

Figure 2 shows a map view of the frequency decomposition RGB colour blend draped 10ms below the top of the Eskdale member. The Eskdale-2 well was drilled in a separate fault block and found economic oil, so the task of defining the reservoir extents both in terms of reservoir quality sand and fluid content becomes critical if the field is to continue to be appraised and developed. As evidenced by the map below, GeoTeric’s Frequency Decomposition attributes reveal many aspects of the depositional system. But the question has always been, “what do the colours mean?”. Validate can help answer that question.

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Topics: Blog, Validate, Forward Modelling, Frequency Decomposition, RGB Blend, GeoTeric 2018.1

Tips for Enhancing Your Data in GeoTeric

Posted by Rachael Moore on 09 Feb 2018

As part of GeoTeric’s Data Conditioning workflow, the Spectral Expression Tool is used to shape your spectrum to increase the frequency content in your data in order to improve the vertical resolution of your data. 

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Topics: Blog, Frequency Decomposition, Spectral Expression

How to optimise frequencies in a RGB colour blend

Posted by Peter Szafian on 29 Jan 2018

RGB Blends of Frequency Decomposition results are very powerful in revealing fine details of the subsurface, but the amount of information that can be extracted from such blends depends on which band-limited response magnitude volumes are used as an input. Selection of the right frequencies depends on the interval, amount of detail and objective of the analysis.

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Topics: Blog, High Definition Frequency Decomposition, Frequency Decomposition, RGB Blend

Adaptive Geobodies Part 2 – High Definition Frequency Decomposition Based

Posted by Ryan Williams on 07 Sep 2017

In the previous Geobodies instalment, a geobody was created using a Standard Frequency Decomposition (FD) blend as this technique is useful in identifying subtle changes within a geological feature. In this post, an Adaptive Geobody will be created using a High Definition Frequency Decomposition (HDFD) blend. The matching pursuit techniques used in GeoTeric’s HDFD blending generates frequency decomposition results as close to seismic resolution as possible. This improvement in vertical/temporal resolution is traded off in terms of accuracy of frequency resolution.

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Topics: Blog, Adaptive Geobodies, Frequency Decomposition, Spectral Decomposition

Adaptive Geobodies Part 1 – Standard Frequency Decomposition Based

Posted by Ryan Williams on 31 Aug 2017

The Adaptive Geobodies tool tool is based on generating delineating geological deposits from data values using model based delineation. It is a powerful and flexible tool which can be used in multiple ways. The basic techniques will be shown below and in this instalment the benefits of using a Standard Frequency Decomposition blends for creating geobodies.

The benefits of the different Blending techniques were outlines in the previous blog posts and here we will look at using the Standard blending method to extract geological features.  The Constant Bandwidth and Uniform/Exponential Constant Q are useful reconnaissance blends as they have very good frequency resolution but poorer temporal resolution. As a result it is possible to identify subtle frequency differences within these blends and subsequently extract them with the Adaptive Geobodies workflow.

 

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Topics: Blog, Adaptive Geobodies, Frequency Decomposition, Spectral Decomposition

Frequency Decomposition Part 3 - HDFD (High Definition FD)

Posted by Chris Han on 20 Jun 2017

The previous two blog posts looked at 'standard' frequency decomposition techniques which applied convolution of the trace with bandpass filters in a traditional manner.  This post focuses on the High Definition Frequency Decomposition or HDFD.

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Topics: Frequency Decomposition, Spectral Decomposition

Frequency Decomposition Part 2 - Constant Q

Posted by Chris Han on 24 Apr 2017

This weeks blog post continues to look at frequency decomposition techniques available in GeoTeric. We previously looked at the Constant Bandwidth technique, we now look at another Standard Frequency Decomposition technique, the Constant Q.

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Topics: Frequency Decomposition, Colour Blending, Blog, Spectral Decomposition

Frequency Decomposition Part 1 - Constant Bandwidth

Posted by Chris Han on 19 Apr 2017

The Standard Frequency Decomposition module uses bandpass filters to carry out decomposition with properties similar to either a Fast Fourier Transform (FFT) or to a Constant Wavelet Transform (CWT).  Due to the nature of the waveform transformation between the frequency and time domains there is resulting uncertainty, as defined by uncertainty principle. Therefore, the different frequency decomposition methods show differences between the frequency resolution and temporal resolution with the two being traded off against each other.

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Topics: Frequency Decomposition, Colour Blending, Spectral Decomposition, Blog

Bedform Blends

Posted by Ryan Williams on 25 Nov 2016

RGB Frequency Decomposition Blends are extremely useful in identifying both structural and stratigraphic events. These are best observed in the Z domain as the effects of vertical smearing are minimized.  When observed along the inline or crossline it can be harder to trace the stratigraphic events.

Bedform Indicator is designed to skeletonize the seismic response to highlight the relationship between seismic strata within the data set. It highlights bedform features such as onlaps and clinoforms. So, by combining the Bedform Indicator volume with the RGB volume it will be possible to map and track sratigraphic features in 3D.

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Topics: Bedform Indicator, Frequency Decomposition, Blog

HD Frequency Decomposition Using a Horizon Preview

Posted by Jacob Smith on 06 May 2016
High Definition Frequency Decomposition (HDFD) is one of the many unique tools and workflows available within GeoTeric. When combined with the standard frequency decomposition methods that are available, this provides the user with a powerful tool for rapidly visualising and extracting meaning from their data. As with all methods there are strengths and weaknesses of HDFD, and understanding this allows us to make the best use of these tools. In this post we will look at one approach that can give us the ability to create HDFD blends using a horizon preview, allowing us to tailor our blends while focussing on key geomorphologies.
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Topics: Blending, Frequency Decomposition, HDFD, horizon, preview, Blog, Spectral Decomposition