Layering for geomodeling

A non-transitory data storage medium having recorded thereon a computer program comprising instructions for performing a computer-implemented method of geomodeling, the method comprising:

• providing a pseudo-stratigraphic grid representing a reservoir having geological units, the pseudo-stratigraphic grid having pillars, each pillar including respective cells, each geological unit being represented by a respective portion of the pseudo-stratigraphic grid and having a respective top, a respective base, and a respective stratigraphic style;
• for at least one geological unit:
• computing a top 2D map representing the respective top and a base 2D map representing the respective base;
• defining a gridding constraint depending on the respective stratigraphic style;
• and
• for each cell of the respective portion, calculating a respective local stratigraphic layering index based on the top 2D map, on the base 2D map, on the gridding constraint and on the respective stratigraphic style;
• providing, for each cell of the respective portion, a respective initial stratigraphic layering index;
• and
• replacing the respective initial stratigraphic layering index:
• wherein:
• at least one of the top and the base has a first region and a second region complementary to the first region,
• at least one of the top and the base 2D map outputs, for each cell of at least one of the top and the base, a respective local stratigraphic value, and the computing of at least one of the top and the base 2D map includes:
• for each first cell of the first region, determining a respective first stratigraphic layering index based on the respective initial stratigraphic layering index;
• and
• for each second pillar intercepted by the second region, determining a respective second stratigraphic layering value by interpolating first stratigraphic layering values;
• the non-transitory data storage medium being configured to be used in a process, the process comprising performing one or more iterations of the method and performing one or more physical actions on a geological environment based on a result of the one or more iterations of the method.

A system comprising a processor coupled to a memory, the memory having recorded thereon a computer program comprising instructions for performing a computer-implemented method of geomodeling, the method comprising:

• providing a pseudo-stratigraphic grid representing a reservoir having geological units, the pseudo-stratigraphic grid having pillars, each pillar including respective cells, each geological unit being represented by a respective portion of the pseudo-stratigraphic grid and having a respective top, a respective base, and a respective stratigraphic style;
• for at least one geological unit:
• computing a top 2D map representing the respective top and a base 2D map representing the respective base;
• defining a gridding constraint depending on the respective stratigraphic style;
• and
• for each cell of the respective portion, calculating a respective local stratigraphic layering index based on the top 2D map, on the base 2D map, on the gridding constraint and on the respective stratigraphic style;
• providing, for each cell of the respective portion, a respective initial stratigraphic layering index;
• and
• replacing the respective initial stratigraphic layering index;
• wherein:
• at least one of the top and the base has a first region and a second region complementary to the first region,
• at least one of the top and the base 2D map outputs, for each cell of at least one of the top and the base, a respective local stratigraphic value, and
• the computing of at least one of the top and the base 2D map includes:
• for each first cell of the first region, determining a respective first stratigraphic layering index based on the respective initial stratigraphic layering index;
• and
• for each second pillar intercepted by the second region, determining a respective second stratigraphic layering value by interpolating first stratigraphic layering values;
• the system being configured to be used in a process, the process comprising performing one or more iterations of the method and performing one or more physical actions on a geological environment based on a result of the one or more iterations of the method.