METHOD AND DEVICE FOR DETERMINING GROUPS OF GEOLOGICAL FACIES

摘要

This invention relates to a method comprising a determination of a first group of facies as a function of the local values of proportion of the groups of facies for each mesh cell of the model. If said first group is among the first set of groups, the neighbouring mesh cells are the current virgin mesh cells neighbouring the set of connected mesh cells, otherwise they are the current virgin mesh cells neighbouring mesh cells associated with a group. A second group is determined for each neighbouring mesh cell as a function of the local values of proportion of the groups of facies for said current virgin mesh cell and if the second determined group of facies corresponds to the first group of facies, identification of said current virgin mesh cell as a candidate mesh cell.

主权项

1. A method for determining groups of geological facies among a first set of groups of facies and a second set of groups of facies in a meshed geological model, with the geological model comprising:
a set of virgin mesh cells; a set of connected mesh cells, the connected mesh cells are associated with a group of facies among the first set of groups of facies; each mesh cell of the model being associated with a local value of proportion for each facies of the first set of groups of facies and of the second set of groups of facies; wherein the method comprises: /a/ determining a first group of facies among groups of facies of the first set of groups of facies and of the second set of groups of facies as a function of the local values of proportion of the groups of facies for each mesh cell of the model; /b1/ if said first group of facies is a group of facies among the first set of groups of facies, for each current virgin mesh cell neighbouring the set of connected mesh cells, determining a second group of facies among groups of facies of the first set of groups of facies and of the second set of groups of facies as a function of the local values of proportion of the groups of facies for said current virgin mesh cell and if the second determined group of facies corresponds to the first group of facies, identifying said current virgin mesh cell as a candidate mesh cell; /b2/ if said first group of facies is a group of facies among the second set of groups of facies, for each current virgin mesh cell neighbouring mesh cells associated with a group of facies, determining a second group of facies among groups of facies of the first set of groups of facies and of the second set of groups of facies as a function of the local values of proportion of the groups of facies for said current virgin mesh cell and if the second determined group of facies corresponds to the first group of facies, identifying said current virgin mesh cell as a candidate mesh cell; /c/ associating said first group of facies with a virgin mesh cell selected among the candidate mesh cells.