Inversion simultanée des données sismiques et des données de production

Coupled Matching of the Production Data and the Seismic Data — Matching procedures are often used in reservoir production to improve geological models. In reservoir engineering, history matching leads to update petrophysical parameters in fluid flow simulators to fit the results of the calculations with observed data. In the same line, seismic parameters are inverted to allow the numerical recovery of seismic acquisitions. However, it is well known that these inverse problems are poorly constrained. The idea of this original work is to match simultaneously both the permeability and acoustic impedance of the reservoir, for an enhancement of the resulting geological model. To do so, both parameters are linked using either observed relations and/or the classic Wyllie (porosity-impedance) and Carman- Kozeny (porosity-permeability) relationships. Hence, production data are added to the seismic match, and seismic observations are used for the permeability recovery. The work consists in developing numerical prototypes of a 1D fluid flow simulator and a 1D seismic acquisition simulator. Then, in implementing the coupled inversion loop of the permeability and acoustic impedance of the two models, we can test our theory on a 1D case. Comparison of the coupled matching with the two classical ones demonstrates the efficiency of our method. We reduce significantly the number of possible solutions, and then the number of scenarios. In addition, the augmentation of information leads to a natural improvement of the obtained models,