Abstract

North Cambay Basin had undulating basin floor topography with a number of highs and lows of varying amplitudes at the beginning of Palaeocene. The fault controlled negative areas were seats for subsequent deposition. Olpad Formation comprising of thick synrift sediments derived from Deccan Trap escarpments were deposited concomitant to subsidence and thus intrabasinal irregularities were reduced. The sequence represents dominantly a period of lacustrine conditions of sedimentation. The oil bearing sands within Olpad sequence indicated in the recently drilled deep well in Santhal field has rejuvenated the pursuit for hydrocarbons in synrift sediments. The comprehension of depositional and palaeo-structural conditions therefore is imperative to locate prospective areas. The prevalence of three distinct play types in Olpad Formation discerned by assimilation of available geoscientific data defines the hydrocarbon prospectivity which at this juncture appears subtle and is characterized by moderate risk-moderate gain.