Abstract:
The reservoir modeling gives detail information about stratigraphy, petrophysical properties distribution, and hydrocarbon prospects distribution in the field. Sawan Gas Field lies on the Khairpur High which is a north to south-dipping regional high and provides for important trapping mechanism for the reservoir hydrocarbons at the field. The purpose of this study is to do geostatistical reservoir modeling and to give a probable well location for exploration. The data for this project include 3D seismic data over Sawan field in SEGY and well logs of the block. OpendTect was used for 3D Seismic Interpretation and Seismic Attribute Analysis, Petrophysical Analysis and for Static Reservoir Modeling. The stratigraphic model was constructed through fine-scale stratigraphic well correlation. The structural model was constructed using interpreted horizons. The petrophysical analysis is used for derivation of porosity, water, and hydrocarbon saturation. Reservoir characterization studies were carried out using different seismic attributes. Sweetness attribute provides very high values as hydrocarbon indicator. It is used for static reservoir modeling. High porosity values even greater than 21 percent are observed in producing wells. Net to gross value range between 70 to 80 percent with high sweetness values indicating prospective gas zones.
