Abstract

Hydrocarbon Prospectivity Perception (Play Fairway) maps are an excellent mode of depicting variation of hydrocarbon prospectivity across a given sedimentary Basin. These maps divide Basinal area into zones having equal probability of success or equal exploratory risk. These maps are immensely helpful to petroleum geoscientists and managers in comprehensive exploration of petroliferous sedimentary Basin. In this study a simple GIS based methodology for preparing Prospectivity zonation (play fairway) maps is described. The present study involved preparation of Hydrocarbon Prospectivity perception (Play fairway) Maps for four major play groups identified and established in Mumbai Offshore Basin viz. Paleocene-E. Eocene (PannaDevgarh), Mid-Eocene-Lower Oligocene (BasseinMukta-Heera), Oligocene to Lr. Miocene (MahuvaDaman) and Oligo-Miocene (Panvel-MumbaiBandra) plays. As an input to the study charge effectiveness, entrapment effectiveness and reservoir effectiveness factor maps, equivalent to CRS (Common risk segment) maps, were prepared in QGIS environment. The Effectiveness factor maps were then integrated and Hydrocarbon Prospectivity Perception (play fairway) maps were prepared for each play discussed above.