When working with color blends of any type, it is best practice to interpret directly in GeoTeric to maintain quality and color intensity. As third-party software differs, quality and visualization will often be impacted following blend transfer. However, we do understand there is often a requirem...
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.
The Report View window is included among the many new features of GeoTeric 2018.1, such as Validate and the Master Project. It can be used to rapidly send items in the 3D Scene to a plan view for PowerPoint or other reporting documents. The value of this tool is most evident when dealing with large data as no time needs to be spent waiting for data to be extracted all over again. Whatever is in the 3D Scene will be sent to the Report View.
Managing the display of markers and well logs within GeoTeric is now easier in GeoTeric 2018.1!
Validate has been developed as part of a three year project with industry partners and is a forward modelling tool that will help you understand what the colors mean in the RGB Blends.
It allows you to validate your interpretation by:
On demand Webinar - See What's New in GeoTeric 2018.1
GeoTeric’s Master Project functionality allows the user to transfer data from a Master Project containing all key data into a Client Project which can be worked on individually. It also allows for project items such as horizons and faults to be seamlessly transferred between Client Projects.
The Master Project will be available with the release of GeoTeric 2018.1.
With the upcoming release of GeoTeric 2018.1, a variety of enhancements to the Adaptive Interpretation tools will be added. This is in addition to a Master Project option, a Report View and the release of the Validate module.
One of the interpretation enhancements in GeoTeric 2018.1 will be the ability to edit horizons in the Base Map by polygon – either those picked previously in GeoTeric or newly picked in the Base Map. The polygons can be used to fill horizon interpretations or delete them.
GeoTeric allows seamless connectivity to your existing interpretation platform through GeoTeric’s core Interpret module. The links included with GeoTeric are: Link for Petrel1 and the Link to DecisionSpace2. A Link for Paleoscan3 is available as a separate module.
One of the least known features within GeoTeric is the option for importing multiple well deviation files at once. This can be used for rapidly loading data from mature fields that may already have significant well control. This feature is built into the normal well loading process and is easy to use. The key to rapidly loading multiple deviation files is that all files must be in the same directory and must have the same format. Single cell values, such as well name, must be in the same location, and all data must be in the same columns in all files.
GeoTeric’s Adaptive Fault Interpretation is a powerful data driven and interpreter guided method of structural interpretation. Since the Graph Theory algorithm is used by the Adaptive Interpretation System to generate data following results, not many fault sticks are required to generate an accurate fault plane in GeoTeric. This allows for an efficient method of interpretation.
Dip and Azimuth volumes are used in several ways in GeoTeric, from processes such as Noise Cancellation (SO FMH & SO Noise filters) to attribute generation (SO Semblance, SO Dip Derivative, SO Discontinuity, Flexure, etc...). The majority of these filters/attributes have the symbol SO in front of them, indicating they are Structurally Oriented.
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.