Abstract

The purpose of this abstract is to discuss the different acquisition challenges during streamer mode seismic operation congested oil field in Mumbai offshore and the efforts to overcome this by maintaining the good data quality. The noises from various sources like seismic interference, activities in rigs or platforms, streamer bending or by environmental impact were tested during onboard QC processing to determine the noise elimination parameters. Also special processing effort was driven on vessel itself to remove the seismic interference. The most complicated part of the project was the middle of swath-05 & SW of swath-04 where the rigs/platforms were closely placed and risky to pass with streamer. Two separate deadhead shooting program and an orthogonal swath were introduced to enhance the optimum coverage around installation complexes. Due to shallow water and presence of unknown position of stake net in NE part of the area, tidal shooting pattern was adopted for smooth & safe operation. The overall project was successfully and safely completed by efficient planning and extra processing efforts to acquire good quality data.