4D Geomechanics Workflow
CoViz 4D offers a 4D Geomechanics workflow, which calculates displacement, strain, stress, and seismic time-shifts in the overburden due to thickness change in the reservoir resulting from production and injection.
The 4D Geomechanics workflow utilizes analytical solutions to displacement based on reservoir compaction and enables rapid, first-order screening of overburden deformation and time-shifts. Hence, for example, the workflow can offer quick-look feasibility modeling to see the potential effects of reservoir subsidence in the 4D seismic signature.
This agile workflow enables teams to assess 4D geomechanical effects and determine if further, more detailed study is required; the workflow also provides value in cases where finite element modeling could be prohibitively expensive and time-consuming. Furthermore because of the ease of the workflow, a Geomechanics specialist is not required, and due to the fast calculation time, new well information can be easily included, as necessary.
Overview of 4D Geomechanics Workflow. Input properties include: POROSITY, NET-TO-GROSS, PRESSURE, or PORE VOLUME MULTIPLIER. Compute: THICKNESS CHANGE.
Geomechanics Workflow Features:
- Computes vertical and horizontal components of stress and strain
- Uses a spatially varying R-factor approach for time-shift calculations
- Integration of path length and velocity changes into 4D seismic workflows
- Calculations are quickly parameterized based on an input reservoir simulation grid
- Utilizes CPU and GPU resources for fast analytical computations, even for very large reservoirs
- Allows for rapid sensitivity analysis and scenario ⁄ feasibility testing
CoViz 4D 13.0
offers vastly expanded support for DGI multigrid files; On-the-fly arithmetic in reservoir simulation time-series plots; New options for effective stress treatment in Sim2Pem; Cloud-native data loading support for select file types; Extensive new features and performance around LiDAR data.
ARTICLES & PAPERS
Hesham Ebaid, Kanglin Wang, Marcelo Seixas, Gautam Kumar, Graham Brew and Tracy Mashiotta examine enhanced workflows and solutions for optimizing the utility of Permanent Reservoir Monitoring data in a deepwater setting.
Graham Brew, Dynamic Graphics, Inc., USA, and Jane Wheelwright, Dynamic Graphics, Ltd, UK, discuss the integration of 4D seismic data into the reservoir management workflow.
A solution that offers a dynamic, temporal visualization environment for data fusion and integrated reservoir surveillance.
Dynamic Graphics has developed a tool which can visualize multiple datasets from an oil field simultaneously in 3D and 4D—from an overall view of the basin to a view of the individual wells and reservoirs—and you can see how it changed over time as well.