Marine seismic acquisition gets improvements

摘要

Broader frequency spectrums and increased fold are providing better data than ever. Marine geophysical contractors are continuing to push the technology envelope to find ways to improve the imaging of the subsurface and increase oil and gas exploration and development success. Wide-azimuth (WAZ) marine surveys have become commonplace in areas requiring subsalt images, and today's surveys are now using full-azimuth shooting using ocean-bottom nodes/cables or coil shooting with towed streamers. But those areas not hampered by salt or other imaging obstructions are in need of improved seismic data as well. Two new technologies are allowing us to dramatically improve the quality. The first is broadband marine seismic, which produces a broader frequency spectrum in the recorded signal and improves stratigraphic and structural detail in the final processed and imaged section. The second, simultaneous shooting, produces higher quality data through increased fold without a linear increase in acquisition costs.