SISMAGE-CIG: INTEGRATING ADVANCED GEOLOGICAL MODELING TOOLS
As a new platform for all the tools used to build geological models, Sismage-CIG, Geoscience and Reservoir Integrated Platform substantially improves the workflow for this type of modeling.
By enhancing the synergy between all the experts involved in this strategic process, the platform drives the optimization of our understanding of geological objects, which can be quite complex, and our ability to represent them in 3D.
Structural model of horizons and faults. Sismage-CIG.
Facies model: turbidity lobes. Sismage-CIG.
Petrophysical model: water saturation of reservoir rocks. Saturation lower than 1 indicates that the rock contains hydrocarbons. Sismage-CIG.
Geological models, a strategic combination of areas of expertise
Building geological models is a cornerstone of petroleum engineering expertise. This 3D representation of a prospect or a field presents our full understanding of its geology, makes it possible to evaluate the existing hydrocarbon volume and streamlines the modeling of its dynamic behavior. This is a key tool for making assessment strategy or development strategy decisions, as well as any others that must be made during the life of the field.
Created using all available information (seismic data, well data, core data, analogous data, production data, etc.), the geological model is the result of the effort to ensure consistency across interpretations from a wide range of specializations (seismic stratigraphy, structural geology, sedimentology, biostratigraphy, mineral geochemistry, etc.) at levels ranging from thin slices in the laboratory to the basin as a whole.
One of the main challenges of the process is indexing all the geological heterogeneities, with the goal being to understand which ones will have a decisive impact on the dynamic behavior of the reservoir.
Sismage-CIG, better results through integration
Given the increasingly complex targets involved, there was a need for better integration of the interpretations. This has become a necessary part of controlling the uncertainties stemming from the subsurface geometry and what it contains, as this is only partially revealed by the collected data. Sismage-CIG (Geoscience and Reservoir Integrated Platform), is the optimal solution for integrating the workflow for a geosciences and reservoir study and constitutes a major step forward. This platform, which facilitates and enhances sharing among various disciplines (geophysics, geology, reservoir and geo-information), is also used to optimize the integration of the geosciences expertise involved in building geological models.
Carried out after the seismic interpretation and before the reservoir simulation, the geological model is built in three stages:
- constructing the structural model from the information provided by the seismic interpretation (geological markers, faults),
- completing the model gridding process,
- performing the infill for the cellular model by describing each cell and attributing specific values to all the parameters that govern the dynamic behavior of the reservoir (type of facies, permeability, porosity, etc.).
Today, Sismage-CIG is used for every stage of the process, which was previously fragmented across several different software programs. The most obvious benefit is decreasing the number of data transfers between platforms, which cost time and may introduce errors.
Proprietary geosciences techniques that make the difference
Another benefit of having access to a proprietary geosciences interpretation platform is the ability to regularly update it with new innovations from our R&D. Designed to meet the concrete needs of users, these new tools constitute a set of bespoke solutions that deliver a more efficient modeling workflow.
For instance, the WakeUp tool, developed in-house over the past several years, is able to handle the delicate step of changing scales between well data (measured in decimeters) and the model's cells (measured in decameters to hectometers) while maintaining overall coherence. It is now available on the Sismage-CIG platform.
Sismage-CIG features other highly advanced proprietary tools for creating and handling structural and meshed models, which constitute the optimal approaches to the most complex structural models, particularly those of reservoirs with many faults or compartments. By improving the way geological complexity is represented, these new techniques (stair-step meshes today and unstructured hybrid meshes in the future) render the reservoir simulations performed after geological modeling more accurate.
Sismage-CIG also sets itself apart from the competition with its cutting-edge facies modeling techniques used across a wide range of geological contexts. These new methods, which can be implemented in multi-scenario and multi-realization studies, utilize much more stringent constraints (both seismic and geological) than commercially-available tools in order to represent heterogeneities in specific depositional contexts.
These original, innovative solutions are perfectly suited to our workflows and our geological targets, putting Total at the cutting edge of key technologies that deliver the most relevant and accurate models.