CoViz 4D offers a rapid, easy to use, first-look geomechanical analysis for assessing reservoir thickness changes that could lead to well integrity issues.
Geomechanical analysis is critical to understanding reservoir thickness changes that occur due to production and injection. With an accurate understanding of subsurface mechanical responses, geologists and engineers gain greater confidence in planning and operational decisions. Leveraging a geomechanics workflow for reservoir analysis can lead to a more efficient way to guide all phases of a reservoir’s development and production.
The Benefits of Leveraging a Geomechanics Workflow
Geomechanics modeling can involve significant volumes of input data and often requires many iterations, varying parameters with each iteration, before reaching a conclusion. CoViz 4D, an industry-leading software package for dynamic reservoir visualization and analysis offers an optional 4D geomechanics workflow module that simplifies and accelerates the reservoir analysis by providing a formal, consistent method for:
- inputting the subsurface data sources used to create the geomechanical models
- selecting the attributes of the cellular grid used to calculate volume change
- defining the parameters relating to deformation, strain, and stress changes
- controlling aspects of the seismic velocity change and time-shifts
- performing the calculations and visualizing the results in 3D or 4D (time-series)
A More Efficient Reservoir Analysis
The CoViz 4D geomechanics workflow consists of four steps. Here’s a brief description of each:
- Indicate the types of calculations (deformation, strain & stress changes and ⁄ or velocity change & time-shift) and inputs (reservoir simulation cellular grid with attributes such as dynamic pressure, net-to-gross ratio, porosity, and pore volume multiplier, and initial velocity grid to sample the volume change and compute the deformation).
- Select the attributes of the cellular grid, time steps, and effective stress coefficient (α) to calculate volume change.
- Define the parameters related to deformation, strain and stress change (Poisson’s ratio, overburden Young’s modulus value, displacement grid vertical spacing).
- Determine aspects of the seismic velocity change and time-shifts (method to define the R-factor).
Customized Scripts for Geomechanics Workflow Efficiency
CoViz 4D, a data visualization analytics software from Dynamic Graphics, Inc., enables geologists and reservoir engineers to efficiently assess geomechanical effects in instances where finite element modeling would be prohibitively time-consuming and expensive. To learn more about CoViz 4D contact our team.