Some preliminary results are presented in this site, which will be presented in detail on forthcoming publications (Bourgeois et al., in prep; Le Carlier et al., in prep; Ford et al., in prep).
The 3D model was based on geological surface map and well database (courtesy of BRGM) and about 30 seismic cross-sections (courtesy of Enterprise Oil).
The geometrical modelling was performed using the gOcad 3-D visualisation and modelling software, specifically adapted to geosciences applications. Thus, the construction of the 3-D model is based on two stages: (i) the first step consists of the introduction of data, that represent partial and local information indicating the location of geological structures (boreholes, structural maps or seismic data); (ii) the second stage (construction of a surface model) aims to link these data by using continuous or discontinuous triangulated surfaces, that represent the boundaries of geological objects (faults, contacts).
The surface model is one of the key-points of the work. The construction of surfaces from the data is performed using the Discrete Smooth Interpolator. This interpolator is completed by a large set on constraints that ensure geological and geometrical consistency of relationships between objects (faults, horizons, ..).
Several horizons were picked in the seismic cross-section in TWT. The horizons were migrated into depth using a quadratic polynomial Z = f(t), and then corrected at the wells. Finally, the horizons were cut by the faults.
