Westerngeco L.l.p.

Other

Schlumberger Technology Corporation

Rohitashva Singh

Martin N Howlid

Johan O A Robertsson

John A Kerr

Ottar Kristiansen

Randall A Shepler

Sarah Elizabeth Ryan

Eric Smedstad

Rory MacKenzie

A seismic survey system having a source array () coupled to a deflector device () that controls the position of the source array. A positioning system unit () is mounted on the source array to provide a signal to a controller, informing the controller of the current position of the source array so that the controller can control the position of the deflector device () and the coupled source array. A seismic source () on the source array may be triggered when the source array is at a desired location as measured by the positioning system unit. The deflector device () comprises one or more wings () in a generally vertical or, alternatively, in a generally horizontal arrangement disposed adjacent to a central body (). The streamlined central body has connection points that allow the deflector device () to be connected to a tow cable () from the tow vessel () and to the source array ().

Active steering for marine seismic sources

A seismic streamer system for acquiring seismic data includes a plurality of first cable sections each employing a first sensor configuration therein, and at least one second cable section operatively connected to one or more of the first cable sections and employing a second sensor configuration therein. In various embodiments of the streamer system, one or more of the second cable sections are sparsely integrated into a streamer, a streamer array, and/or a seismic spread. The first sensor configuration may, e.g., include a conventional hydrophone distribution, and the second sensor configuration may, e.g., include multicomponent sensors such as at least one of a particle velocity sensor, a pressure gradient sensor, an accelerometer, and a combination thereof. The present invention is useful for attenuating noise in the measured seismic data as well as deghosting the data. A particular deghosting process includes decomposing the up- and down-going parts of the vertical component of particle velocity associated with the acoustic wave reflections from the strata.

Seismic streamer system and method

A technique is provided for control of subsea well systems. The technique utilizes a subsea controller coupled to a plurality of subsea well system components to allow localized control of the subsea well system. The subsea controller can be used in a variety of functional applications, such as balancing power distribution to subsea components.

System and method for controlling subsea wells

Apparatus and methods for positioning seismic streamers are described, one apparatus comprising a body, the body adapted to be connected to a seismic streamer, the body defining at least one flow passage there through, and a diverter adapted to selectively adjust flow through the flow passage. This abstract is provided to comply with the rules requiring an abstract, which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Apparatus and methods for seismic streamer positioning

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Houston, TX, United States of America

Rohitashva Singh