SISMAGE-CIG: FROM GEOSCIENCES INTEGRATION TO RESERVOIR SIMULATION
Extending Sismage-CIG (Geoscience and Reservoir Integrated Platform) into the reservoir environment is the latest development for Total's EP interpretation platform, which is shared by all geosciences and reservoir disciplines. By enabling the connection with flow simulations, the platform will help optimize updates to the reservoir model and facilitate the uncertainty quantification process during operations. These advantages, along with many others, demonstrate the improved solidity and reliability of our modeling workflows and thus of our development plan.
From geological models to dynamic simulations
Reservoir modeling is the final component of Sismage-CIG (Geoscience and Reservoir Platform). With this last piece in place, the platform has become a vector for full integration between the 2G&R disciplines and the tools that they use, acting as an interface with the flow simulator (not a part of Sismage-CIG).
By orchestrating the back-and-forth between the static model and dynamic simulation, the platform centralizes the tools used to:
Tool for interpreting multi-well pressures. Sismage-CIG.
- build the dynamic model, using the geological model and the configuration and parameterization of faults, wells, fluid and rock properties, etc.
- monitor the quality of data going to and coming from a simulation process
- visualize and analyze the simulation results, thanks to the innovative tools that enable all geoscientists to contribute to the reservoir model updating process
Centralizing many different interpretation, synthesis and analysis tools on the same platform prevents the workflow from being spread across many different tools, thereby streamlining the work of reservoir engineers.
A streamlined, expedited history match loop
One of the benefits of performing reservoir modeling on the Sismage-CIG platform is the proprietary software for viewing very different types of data at the same time, made possible by the full integration of the geosciences chain. In this way, we are able to compare the simulated results to those measured in the field, whether these are data from well tests or 4D seismic data. This is a considerable plus when it comes to calibrating the model!
The tools used to help calibrate the reservoir model with the historical production data were developed specifically for Sismage-CIG for the purposes of streamlining and expediting this step.
Several assisted calibration and uncertainty management techniques exist side-by-side, enabling users to choose the one that is best suited to the focus of their study: the classic, manual “trial and error” method to test the sensitivity of one or two parameters; the experimental design method to handle up to around one hundred uncertain parameters; or the most advanced, automated assisted calibration using the Ensemble Methods tool developed by Total R&D, which can handle billions of uncertain parameters.
As geologists and geophysicists work in a shared space with reservoir engineers, they can more easily contribute to this strategic activity and help ensure that the properties of the reservoir model remain consistent and unaltered during the calibration.
Supporting a fully integrated 2G&R picture of our fields from geophysical interpretation up through the update to the reservoir model, Sismage-CIG improves the efficiency of the development plans designed to ensure cost-effectiveness, value maximization for projects and hydrocarbon recovery.
Sismage-CIG and INTERSECT, looking ahead to gigamodels with one billion cells
In 2012, Total joined the INTERSECT consortium to help develop a next-generation reservoir simulator. That is how we became co-owners of this computing code and a stakeholder in its development. Our ownership of Sismage-CIG and co-ownership of INTERSECT give us total control over their development, which helps ensure their optimal integration. Thus, the optimization of fault modeling in flow simulations, which we are currently working on, was designed at the overall Sismage-CIG/INTERSECT level to ensure full consistency between the modeling and dynamic simulation tools.
Tool for visualizing historical production data. Sismage-CIG.
In addition, this level of control enables us to develop tools and workflows that are capable of making the best use of our existing computing assets, namely Pangea, one of the most powerful supercomputers in the world (6.7 petaflops).
Developing code that optimizes parallelization enables us to overcome the challenges of simulating and visualizing increasing large models, up to gigamodels with one billion cells for very large fields. The mass parallelization of calculations is also a precondition for highly complex physical phenomena, such as those involved in performing EOR (Enhanced Oil Recovery) in a timely and cost-effective manner.