Speaker(s): Nicolas Clausolles
Date: Thursday 16th of May 2019
Location: room G201, ENSG, Nancy
Abstract:
Salt welds are surfaces or zones resulting from the (nearly) removal of salt from an initial layer or diapir, putting in contact originally separated sedimentary layers. They are still poorly known and few sudies and data are available in the scientific literature, although their impact on reservoir sealing is globally recognized.
This seminary is the occasion to present my recent works on the modeling of salt welds, starting from an initial implicit structural model where salt geobodies have already been interpreted. The first step consists in detecting the isolated salt volumes in the model that require to be connected. Then the weld surface is extracted from the scalar field defining the structural model using an image segmentation method, the watershed segmentation. This segmentation defines a semi-infinite plane through the model. This plane is finally truncated using some visibility criteria to obtain the final weld surface.