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دوازدهمین همایش انجمن زمین شناسی ایران
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  • over/under towed streamer data acquisition, a novel method for offshore hydrocarbon exploration

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 789
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    • شماره تماس دبیرخانه رویداد: -
     we have introduced a nearly novel technique for marine seismic operation called over/under towed streamer technology. in spite of its high cost compared to other conventional techniques; however, due to many advantages that this technology has, it has become a common method for marine seismic exploration. the main idea of this technology is to use two concurrently towed streamers at two different depths which must be kept fixed in a vertical plane. using two concurrently streamer is to overcome a typical problem in marine seismic operation caused by downward reflection of our desired upgoing wavefields from the sea surface. these undesired downgoing reflected wavefields from the sea surface is well-known as “ghost”. one benefit of this technology is that we can acquire seismic data at depths deeper than conventional acquisition depths. this technology enables us to acquire data that has the high-frequency characteristics of conventional data recorded at a shallow towing depth and the low frequency characteristics of conventional data recorded at deeper towing depth. the advantages of this technology are presented and this technology is compared with other conventional methods. over/under data acquisition is also investigated. to prove the reliability of the technology some case histories briefly are studied show the superiority of the technology to other conventional technologies. the new developments of this technology as well introduced and their advantages in comparison with the premium technology are explored too.

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