WIDE AZIMUTH SEISMIC DATA ACQUISITION METHOD AND SYSTEM SKIPPING LINES

摘要

Wide azimuth data acquisition systems using at least three streamer sets achieve shorter survey time and enhanced angular coverage relative to conventional systems using two streamer sets. Various techniques such as high-density seismic source activation and alternating surveyed bands with skipped bands lead to data quality similar to the conventional system, while maintaining the increased productivity advantage.

主权项

1. A method for wide azimuth seismic data acquisition, the method comprising:
towing, in an inline direction, a seismic data acquisition system including
seismic sources distributed along a cross-line direction with a predetermined step, the cross-line direction being substantially perpendicular to the inline direction,a first streamer set and a second streamer set towed behind a first and a second outer seismic source of the seismic sources, respectively, anda third streamer set towed behind a middle seismic source among the seismic sources; activating the seismic sources; and acquiring seismic data using detectors carried by the first, second and third streamers.