Caractérisation pétrophysique du réservoir Eifelien F3-Timssite Ouest dans le Bassin du Berkine à l’aide des Méthodes Géostatistiques

Abstract

The Eifélien F3 hydrocarbon reservoir of Timissit West in Berkine East Basin belongs to the eastern province of the Algerian Sahara. The logs carried out at the level of the reservoir layer in the wells (a total of 7590 measurements) made it possible to measure the petrophysical parameters: The Permeability (K), the Porosity (PHIE), Hydrocarbons saturation (SH), water Saturation (Sw), the clay Volume (VShal), the gamma Ray (GR), the Resistivity (AT), the Psonic (DT), the Density (ROHB) and the Neutron (TNPHI). The processing of data obtained by logging tests revealed a good correlation in the main part of the reservoir. The Principal Component Analysis - PCA – performed on all data of the etrophysical parameters allowed to determine the association of the parameters representing the favorable facies to accumulation of hydrocarbons. This association is negatively correlated with the load factors F1. Finally, the eostatistical modeling by ordinary kriging of the distribution of values of individuals of F1 made it possible to determine the facies of the potential and non-potential reservoir rocks.