Porosity Modeling Using Simultaneously Seismic Attribute and Electrofacies Data in Sarvak Reservoir of an Iranian Oil Field

In this study, 3D model of effective porosity in heterogeneous Sarvak reservoir in one oil filed located in Dezful Embayment has been constructed. Therefore, geostatistics method has been applied for porosity propagation along with using trend maps of seismic attributes as well as seismic cube as secondary variable for Collocated co-kriging. Thus, the different seismic attributes including Attenuation, Envelope, RMS amplitude, Sweetness and Acoustic impedance attributes have been provided. The multiple attribute property has been used for preparing the related trend maps to be used in porosity modeling. Moreover, electrofacies analysis has been done via applying MRGC algorithm in order to control porosity distribution in 3D reservoir model. In this study, we tried to consider the trend maps, electrofacies, and seismic acoustic impedance cube along with applying geostatistics algorithms for 3D porosity propagation. Based on this study, the lower Sarvak has better reservoir quality than the Upper Sarvak due to developing of good reservoir facies. According to this study, the accuracy of the porosity model increases when it is used simultaneously seismic data and electrofacies, resulted in decreasing uncertainty of porosity distribution.