Structural analysis and seismic stratigraphy for delineation of Neoproterozoic-Cambrian petroleum system in central and eastern part of Bikaner–Nagaur basin, India

Abstract Bikaner–Nagaur basin is located in the northwestern part of India and lies on rising flank Punjab platform Middle Indus Pakistan. Existence Neoproterozoic-Cambrian petroleum system was confirmed by exploration activities western periphery basin, whereas vast areas central eastern parts remain unexplored. Knowledge this unexplored limited due to non-availability data. Recently, 2525 line km regional 2D seismic data acquired for first time Government under National Seismic Program (NSP) unlocks opportunity comprehensive understanding subsurface geology basin. Present work aims interpret recently integrate with available surface (outcrop) data, gravity well (drilled basin) unfolding elements, structural configurations stratigraphic features hitherto central-eastern Two hydrocarbon plays: (1) Jodhpur (2) overlying Bilara/Hanseran Evaporite Group (HEG) were envisaged. Both plays depicted distinctive characteristics, alignment distribution reservoir, source seal. Fluvio-deltaic sandstone within group shallow marine fractured dolomites Bilara/HEG showed potential reservoir characteristics organic rich laminated dolomites, stromatolites argillaceous litho-units have been predicted as prospective source. The Halite layers HEG considered effective seals. Fault bounded anticlinal structures associated Cambrian compression identified main entrapment accumulation. witnessed long tectonostratigraphic history two major compressional phases Structures formed are likely be charged maturity peak expulsion later, during early Mesozoic period. Overall, study indicates new opportunities accumulation