Marine seismic data acquisition with short streamers

摘要

Marine seismic data is acquired using a shooting vessel 24 having one or more seismic sources 25 followed by a towing vessel 21 having a plurality of streamers 23. The two vessels preferably follow the same path and the offset between the source and the nearest receiver on the streamers may be up to 2000 metres. The streamers 23 are significantly shorter than conventional streamers, preferably less than 2000 metres in length. The towing vessel may also tow additional seismic sources 22. The distance between the sources 25 and the streamers 23 compensates for the long offsets that are lost by shortening the streamers. Using shorter streamers reduces cross line errors due to feathering and allows for more repeatable positioning of the receivers in a 4D acquisition.