Water bottom multiple

Go to old article view Advertisement. Partners Google Scholar CrossRef IBAAS VIRAL HEPATITIS CONGRESS JournalTOCs. Radon space which could be used for subtracting the. The summation process may be followed by another nonlinear step of comparing the summed output with the original e. Here are the instructions how to enable JavaScript in your web browser. Enhancement Using Parabolic Radon Transform: A portion of the down-going wavefield travels into the subsurface and provides the primary seismic data by reflecting off of subsurface formations.

We'll simply email you a link to reload your cart. Once the plumber has cut the 'female' threads into the barrel, coat the threads of the male connecter with silicone, and using your hand, screw it in as tight as you can. Figure 4 shows a comparison of a 2D marine line from the North Flemish Pass on the east coast of Canada. In Figure 2, the second order multiple right is constructed by combining a water layer raypath red with the blue raypath which is a first order multiple blue. In selecting barrel placement, make sure you take the time to look at the vegetation in the area.

Another benefit is that as it's constantly wearing away, there's no buildup of old paint, which can be a pain to remove when the time comes. Review of Radon Transform Methods 3. Some techniques are based on the fact that multiples are periodic in nature as opposed to the assumed random nature of the reflectivity series [ 2 ] , and based on their periodicity, the multiples can be predicted and then subtracted from the primaries [ 3 , 4 ] , leaving ideally seismic data that is free from multiple energy. The vents are completely separate and not connected.

Plate The reverberation in water illustrated on this sketch corresponds to persistence of a wave sound after its source has stopped, caused by multiple reflection of the wave within a closed space in this case the water layer. In this study, an attempt was successfully made to eliminate water bottom multiples by application of a specially derived parabolic radon filter on a 3D streamer seismic dataset acquired from offshore Niger Delta with the objective of improving the quality of the seismic data. For full functionality of ResearchGate it is necessary to enable JavaScript. HAASE Geo-X Systems Ltd, , st Street S. Identification and suppression of multiples in ocean bottom seismic data. The down-going wavefield is estimated by determining a difference between a portion of the pressure signal where polarity reversals exist and the portion of the velocity signal where polarity reversals exist and applying a scaling factor to the result. The primary events were reasonably flattened after the NMO correction whilst the water bottom multiples became evidently clear, showing up from the near to far offsets in the gathers.