Sarvak and Garau Formations are a main unique reservoir in Tang-e-Bijar Gas Field. It was subdivided to 17 zones and 7 subzones. To build a reliable and realistic structure model, 4 different depth structure maps on top of Sarvak formation have been analyzed from structural geology point of view. Therefore, 4 structural models have been built in Irap-RMS software and then rock volumes were calculated. Petrophysical parameters (porosity, Sw, NTG) and GWC depth have been considered as the constant values for the structural models to demonstrate the effect of structural elements on hydrocarbon initial in place.


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