SISMAGE-CIG: ONE-OF-A-KIND INTERPRETATION SOLUTIONS
Sismage®, Total's long-standing geophysical interpretation platform, is without equal in the oil industry. The advanced interpretations that it enables are also enhanced by a continuous flow of innovations that have helped break down barriers between geophysics, geology and reservoir engineering over the past thirty years. These attributes have made Sismage® the foundation of the Sismage-CIG, Geoscience and Reservoir Integrated Platform, at Total’s E&P.
Sismage-CIG is used to extract geological surfaces from seismic information: pictured is a twisting channel.
Image processing reveals areas where drilling new wells involves greater uncertainty.
Powerful Sismage-CIG algorithms are used to view the geometry of faults and sedimentary objects in three dimensions.
Sismage®, a tailor-made seismic interpretation platform
The first link in the geoscience and reservoir integrated platform, seismic interpretation involves converting seismic images into geological information. More specifically, this involves identifying geological elements that will be used to build the structural 3D model for an exploration prospect or a deposit slated for development: the horizons (interfaces between different lithologies), faults, tectonic deformations and sedimentary bodies.
To successfully complete this step, we have set ourselves apart from the competition by developing Sismage®, a proprietary interpretation station without equal in the oil industry. This platform owes its remarkable performance, which has been widely recognized by the industry, to its unique positioning: the application of image processing techniques—from the medical field in particular—to seismic imaging. By automating the search process for geological elements and objects in seismic images, Sismage® enables geoscientists to focus on the more complicated aspects of the interpretation process. The station also draws on its highly original development process, which has always been user-driven. Our desire to efficiently meet their needs has been the guiding principle for the research process, which began thirty years ago and continues to add to the list of platform features. The ongoing integration of bespoke tools, tailored to the specific challenges of the O&G assets business line of the Group's Exploration & Production branch, is one of the platform's crucial competitive advantages.
An integrated geosciences chain used by 600 individuals worldwide
The seismic interpretation features make up the “long-standing” core of the Sismage-CIG platform. The most important of these are:
- the geological horizon propagator: using small “seeds” left in the seismic images, the machine explores the seismic cube in every direction and automatically propagates the horizons
- fault picking and automatic detection: specific algorithms automatically detect and align points of discontinuity in the seismic images, which are at times barely visible to the naked eye and which reveal the existence of faults
- detecting sedimentary bodies: neural network technology is utilized to automatically create an inventory and map many objects, including turbidity channels
- Geotime: this tool, which automatically estimates the geological period of sedimentary deposits at every point in the seismic image, is very useful for understanding complex depositional sequences.
These tools have made Sismage® a great success. Implemented at the head office and at 35 subsidiaries, the interpretation station is now used by around 600 individuals for 90% of the seismic interpretation work conducted at Total Exploration & Production.
From Sismage® to Sismage-CIG, Geoscience and Reservoir Integrated Platform
Enhanced with new tools from our R&D efforts, Sismage® has progressed beyond seismic interpretation to become Sismage-CIG, a platform shared by many disciplines and a powerful tool for integrating expertise. The scope in the field of geophysics has also grown to include processes upstream of seismic interpretation (helping create velocity models for seismic imaging, quality control for seismic processing, etc.) as well as downstream (contributing to the seismic characterization of the reservoir).
The tools for well design, for geosteering (monitoring and optimizing drilling trajectories using seismic data during drilling) or for predicting abnormal pressure before the wells are drilled have helped bring geologists and drilling specialists closer together. The advanced 4D seismic interpretation modules have made this technology an integral part of the effort to optimize the interpretation of production monitoring for O&G fields.