Resolving Key Issues of Mature Mumbai Offshore Fields Using PP-PS Seismic Interpretation

Neelam-Heera (NH) fields are located in the Panna-Bassein block of the Mumbai offshore basin and are significant contributors to India’s oil and gas production. These mature oil and gas fields are producing mainly from Eocene-Oligocene carbonate reservoirs with established carbonate plays in this area. Key challenges of NH fields include seismic imaging issues in areas perturbed by shallow gas along with faults, discrepancy in time and depth structures caused by huge lateral and vertical velocity variations, and delineation of karst/discontinuities in the Neelam Bassein Formation to improve well planning and avoid mud loss. The seismic interpretation study we conducted used recent ocean bottom node (OBN) seismic data to provide new insights to these challenges and are discussed in this paper.