Patent ID: 9678230
Date: 2017-06-13
CPC Classifications: G01V

Claim:
1. A method for seismic data acquisition comprising: towing plural streamers with a streamer vessel; towing a source with the streamer vessel; towing first and second front sources, each located in front of the plural streamers along a traveling path of the streamer vessel, with corresponding first and second front towing vessels; and towing first and second large offset front sources, each located in front of the first and second front sources along the traveling path, with corresponding first and second large offset front towing vessels, wherein the first and second front sources, the source and the first and second large offset front sources are actuated simultaneously or sequentially during the survey, and wherein a cross-line distance between the first and second large offset front sources, along a cross-line direction which is substantially perpendicular on the traveling path, is larger than a cross-line distance between the first and second front sources.