Cutting-edge marine seismic technologies — some novel approaches to acquiring 3D seismic data in a complex marine environment
First Break - Nov 2017 - Special Topics
Azizur Rahman Khan, Turki M. Al-Ghamdi and Fuad A. Al-Somali
The use of streamer or Ocean Bottom Cable (OBC) techniques for a seismic survey in a complex marine environment present major operational challenges owing to islands, large variations in water depth within a few kilometres from the shore and a complex sea floor because of canyons, pinnacles, steep reef flanks, rugose sea floor, and corals. Salt-dominated provinces, too, present a complicated geological setting — deep targets below salt layers of variable thickness, salt mounds, massive halite and anhydrite layers in the overburden, a highly rotated post-salt section, steep geological dips at the target level, and a complex fault system. Complexity of the survey area requires novel approaches and customized seismic data acquisition technologies for a cost-effective imaging solution. We present four innovative marine seismic technologies, tested to assess their efficacy in acquiring long offset wide azimuth data, in a logistically complex marine environment.
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Kietta is present at SEG International Exhibition and Annual Meeting in Houston. Our CTO Luc Haumonté will present two abstracts on FreeCable technology. Do not hesitate to attend if you are the conference! The first abstract compares FreeCable vs. legacy acquisition techniques. The second abstract presents real survey acquisition results for the first time! Kietta will also be present at booth No. 2227. Results comparing FreeCable vs. Seabed will be presented there.
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Traditional marine seismic acquisition methods (streamer, OBC) have reached some inherent limitations that are difficult to overcome. Some new methods such as nodes have been recently introduced but lead to a significant cost increase in opex due to their low productivity...
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The use of streamer or Ocean Bottom Cable (OBC) techniques for a seismic survey in a complex marine environment present major operational challenges owing to islands, large variations in water depth within a few kilometres from the shore and a complex sea floor because of canyons, pinnacles, steep reef flanks, rugose sea floor, and corals...
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The world economy is demanding an increasing volume of oil and according to oil market specialists this trend is not expected to decrease in the next decades. The easy oil is gone and oil companies currently seek either increasing the existing production, which will last for some limited period of time, or continuing exploration for new discoveries...
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This paper was presented at the 2016 EAGE/SPE Sub-Salt Imaging Workshop. It describes the FreeCable system and how it delivers value to improve sub-salt imaging.