SKUA-GOCAD Modeling while Interpreting
A geologically coherent structural and stratigraphic interpretation in one click.
In order to validate the structural interpretation by looking at fault contact geometry, fault displacement maps, and fault seal potential, a 3D structural model must be built. Using the SKUA™ UVT Transform™-based modeling system, interpreters can rapidly construct such a model using all interpretation data. Past modeling limitations made maintaining synchronization between the model and the current interpretation difficult; plus, users lacked the time and expertise to perform these workflows efficiently. Paradigm® has succeeded in simplifying the process while preserving the complexity and fidelity of the subsurface interpretation. This breakthrough provides geoscientists with the full range of benefits to be gained by modeling.
SKUA is able to honor all interpretation data and build a geologically coherent structural model in "one click". The one-click button between SeisEarth™ and SKUA enables users to send their interpretation to SKUA, and to retrieve the fault network, the stratigraphically consistent horizons extended to the fault planes, and the associated fault polygons.
SKUA UVT Transform-based modeling lets users validate their stratigraphic interpretation by displaying the seismic volume in paleo-space, in order to check if all seismic events appear as when deposited. If not, SKUA allows re-interpretation of the stratigraphy in both the XYZ space and paleo-space.
AUTOMATING INTERPRETATION: GLOBAL INTERPRETATION
SKUA enables a semi-automatic global interpretation workflow depicted in the diagram below:
Starting from a seismic volume, faults are auto-picked using a fault-likelihood attribute computed in SKUA, horizon patches are picked in the entire volume (thousands in minutes), and included in a SKUA model to compute a geological time volume used to restore the seismic data in paleo-space. SKUA has the unique ability to automatically pick faults and compute a geological time volume from this information.
Modeling while Interpreting benefits
- Saves time in the prospect generation process and seismic-to-simulation workflow by using a single model for all steps in the asset cycle.
- Improved quality of interpretation and prospect maps results in higher confidence in prospective wells.
- Rapid modeling while retaining the complexity of the actual subsurface enhances understanding, leading to optimal well placement.
- Accelerating the seismic-to-simulation workflow while improving production estimates with more realistic models reduces time to first oil or gas.
Modeling while Interpreting features
- Enables users to perform a more complete interpretation of the fault network.
- The fault network can be validated using different quality control tools such as displacement map or displacement vs. length crossplots.
- All horizons are constructed inside a consistent fault network. The fault polygons are therefore consistent from map to map, which is impossible to guarantee when creating maps one horizon at a time.
- Horizons are interpolated using geological rules that honor the stratigraphic column and associated layering structure (e.g. conformable horizons should behave similarly).
- Horizons are properly truncated against fault, salt, and erosion surfaces.
- Well marker misties are integrated as part of either the velocity QC or structural interpretation validation step.
All Epos™-based applications enable interoperability with third-party data stores, including:
- RESQML 2.0.1
- OpenWorks® R5000.10
- Petrel* 2017 & 2016
- Recall™ 5.4.2
(*is a mark of Schlumberger )