f Logical object model and derived exchange format for 3D subsurface model data

In the Oil and Gas Exploration and Production Industry many data are being exchanged or traded. For many object classes commonly agreed data exchange formats exist (e.g. SEGY. LIS. UKOOA. OLG. etc.). An important object class without any standard exchange format is the class of 3D geological or geophysical data. In the Geoscience Research Programme funded in part by the EC (OG XII) a logical model has been developed for objects describing 3D subsurface modeis. From the logical object model three types of implementations and a exchange format can be derived.