Petroleum Systems Modeling in Central Iranian Sedimentary Basin: New Strategy for Old Hydrocarbon Exploration Activities

The integrated Petroleum Systems Modeling Study was carried out with the software PetroMod, with the main aim to determine prediction and reconstruction of the thermal history, hydrocarbon generation and source rock maturity over geological time, exploration prospect ranking for future exploration strategy in the Central Iranian Sedimentary Basin. The structural evolution, which is partly complex involving salt movement and inverse faulting, has been reconstructed. Detachment folding in Alborz and Sarajeh during Miocene has led to hydrocarbon reservoirs since the end of Miocene. These were accumulated in the paleo-anticlines. The target ranking shows that the essential risk in the CIB is the sealing risk. Optimistic constructed scenarios, interpreted with a shale sealing lithology at the base of the URF (sealing the top of Qom Formation), show hydrocarbon charges in the reservoirs at the top of Qom Formation. The target ranking is based on realistic petroleum charge scenarios with a combination of different sealing features was carried. Finally petroleum system outputs used to reconstruction of Sarajeh gas field in Gas injection project and condition of reservoir for type of gas will be injected.