Print this pageQuantitative HC Potential Evaluation Using 3D Basin Modeling
SCHNEIDER, F., O. BREVART, and J. M. GAULIER
1D and 2D basin modeling tools have been used within oil companies for exploration purposes since approximately 10 years.
1D basin models are useful for: (1) the reconstruction of the thermal history of the basin, and (2) the evaluation of the maturation of the organic matter. In sedimentary basin context, the 1D approach is satisfactory for these purposes because the thermal transfers are mostly vertical. Indeed, thermal convective transfers are most frequently negligible.
2D basin models furthermore provide the possibilities of (1) performing an evaluation of the pressure history, and (2) appreciating the hydrocarbons migration and reservoir filling. However, these evaluations can only be qualitative because fluid (water, oil, and gas) migration is mainly convective and therefore sensitive to 3D geometry and an isotropy.
For these reasons, a basin modeling tool has been developed. This tool allows to simulate in 3D the thermal history, as well as pressure evolution and multiphase flow migration.
The 3D effects will be demonstrated on real cases by comparing results from 3D simulations with results coming from 2D simulations.
Furthermore, the 3D approach allows to perform a quantitative evaluation of the hydrocarbons produced in the source rocks and trapped within the reservoirs.