PowerLog
Low Frequency Modeling with EarthModel FT
Complex Structural Modeling for Geophysical Studies
EarthModel® FT bridges the gap between geologic modeling for reservoir simulation and model building required to support geophysical workflows in the Jason® suite. EarthModel FT supports complex faulting and geology, horizontal wells, model building in the time domain and use of velocities as trends.
Improved Fault Editing
UpdateAbility handles situations where updated information must be cascaded through the model to bring it up to date. In combination with EarthModel FT’s editing capabilities, this is even more powerful. You do not have to go back to the seismic interpretation system to correct problems in the interpreted surfaces.
In this example, a fault was interpreted in a seismic workstation environment. Truncation of surfaces to faults was a problem. The original fault surface was recreated with fault sticks, and subsequent editing of the nodes along with UpdateAbility allowed easy iteration to a solution.
Horizontal / Highly Deviated Wells
Deviated wells, including horizontal wells, are handled properly in the EarthModel FT approach. Wells are not “verticalized” in each layer. Each well data point is mapped to a cell in the geologic model so that the spatial relationship between the well tracks is correctly calculated.
Well Interpolation
EarthModel FT uses a deterministic distance-based algorithm with distance and power parameters to populate the reservoir models from the well logs. There is also a Fast mode for easier parameter testing.
Secondary variables can be used on the interpolation process. There is no separate calibration, and no additional calculations are needed. In the above example, a velocity horizon is used as a secondary variable to guide the interpolation of acoustic impedance.
Comparison with EarthModel
EarthModel FT has the following advantages vs. the basic EarthModel product:
- EarthModel FT has much greater capability for creating structurally complex models.
- EarthModel FT has better integration with other geomodeling software (Petrel, Roxar, EDS) through RockScale.
- EarthModel FT is required for StatMod® MC and RockMod® workflows, and optional for InverTrace®Plus and RockTrace® workflows. However, in a workflow where the InverTracePlus/RockTrace result will be used as input to the StatMod MC/RockMod process, it is best to start with EarthModel FT as the more detailed structural and stratigraphic model will be of high value.
- EarthModel FT has better functionality for using velocities as trends.
- EarthModel FT provides additional flexibility for RockTrace low frequency model building through the use of different modeling parameters for the elastic properties (VP, VS, Density).
- Deviated wells, including horizontal wells are handled fully in the EarthModel FT approach. In the EarthModel approach, the deviated wells are verticalized within zones, which may occasionally cause difficulties if the model is used for more than the low-frequency trends in InverTracePlus and RockTrace.
EarthModel FT – The fastest way to build (and maintain) your geologic model. Available on either Linux or Windows®.
