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8183868 |
Method to maintain towed dipole source orientation
Apparatus and method for a steerable horizontal electric dipole source system for underwater deployment as a moving source in electromagnetic surveying of subsurface regions for hydrocarbons....
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8175765 |
Controlling movement of a vessel traveling through water during a seismic survey operation
To perform control of movement of a marine vessel traveling through water during a seismic survey operation, input information relating to factors that affect a speed of the marine vessel is...
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8050139 |
System and method for towing acoustic source arrays
A technique facilitates the production of acoustic pulses used in marine seismic surveys. A source array system comprises a plurality of acoustic sources suspended from a float in a plurality of...
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8014228 |
Marine seismic sources and methods of use
Marine seismic sources and methods of use are described, one source comprising a first set of source arrays and a second set of source arrays, each source array of the first set alternates in...
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8004930 |
Methods and systems for determining coordinates of an underwater seismic component in a reference frame
A method comprising determining coordinates of a first point rigidly attached to a rigid body floating on the sea surface in a desired coordinate reference frame; measuring orientation parameters...
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7965583 |
Method and apparatus for guiding seismic acquisition equipment
The invention relates to a method for acquiring seismic data at a plurality of positions spread out over a zone on the seabed which includes transmitting acoustic waves in the water layer above the...
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7957220 |
Active steering for marine seismic sources
A seismic survey system having a source array (11) coupled to a deflector device (15) that controls the position of the source array. A positioning system unit (16) is mounted on the source array...
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7944774 |
Method for determining adequacy of seismic data coverage of a subsurface area being surveyed and its application to selecting sensor array geometry
A method for marine seismic surveying includes towing seismic sensors in a plurality of streamers in the water, actuating a seismic energy source in the water at selected times and detecting...
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7933163 |
Method and system for controlling the position of marine seismic streamers
A method and control device for controlling the position of a marine seismic streamer spread and the ability for controlling individual marine seismic streamers both in shape and position relative...
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7881152 |
Active steering for marine sources
A seismic survey system includes a winch having a winch cable coupleable to a source array towable between two deflected lead-ins, a positioning system for determining a current position of the...
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7835223 |
Removing noise from seismic data obtained from towed seismic sensors
A technique includes obtaining different sets of data, which are provided by seismic sensors that share a tow line in common. Each data set is associated with a different spatial sampling interval....
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7804738 |
Active steering systems and methods for marine seismic sources
Systems and methods for automatic steering of marine seismic sources are described. One system comprises a marine seismic spread comprising a towing vessel and a seismic source, the seismic source...
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7800976 |
Single foil lateral force and depth control device for marine seismic sensor array
A lateral force and depth control device for a marine streamer includes a housing configured to be coupled within the streamer. A control surface is mounted to the housing such that a rotary...
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7778109 |
Current prediction in seismic surveys
A method for use in seismic surveying includes determining the shape of a seismic cable during a seismic survey; determining the tension on the seismic cable at a plurality of points along the...
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7755970 |
Methods for controlling marine seismic equipment orientation during acquisition of marine seismic data
Methods are described for actively steering a towed marine seismic component using one or more actively controllable control members; reducing the actively steering of the control members during...
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7755971 |
Sensing system
The present invention relates to a sensing system, in particular to sensing system for sensing undersea seismic events. A vibration sensor is provided for sensing seismic vibrations on the sea bed...
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7738317 |
Apparatus and methods for controlling position of marine seismic sources
Apparatus and methods are described for remotely controlling position of marine seismic equipment. One apparatus comprises a source connected to a tow member; and an adjustment mechanism connected...
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7701803 |
Underwater acoustic positioning methods and systems based on modulated acoustic signals
Methods and systems for moving seismic streamer steering devices to target positions are disclosed. One method comprises calculating forces required to steer one or more seismic streamer steering...
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7660191 |
Methods and apparatus for acquisition of marine seismic data
Methods and apparatus for acquiring marine seismic data are described. One method comprises selecting tow depth of one or more marine seismic streamers based at least in part on lack of or presence...
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7660190 |
Deflector devices
A deflector device (22) for use with a tow line between a seismic survey vessel and a tow, in particular a seismic streamer or streamer array, in the water behind the vessel comprises a vertically...
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7660192 |
Seismic streamer receiver selection systems and methods
Systems and methods for determining inline skew of one or more seismic streamers are disclosed. One system embodiment includes a seismic streamer including a plurality of receivers, a skew detector...
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7623411 |
Stabilized streamer connection system
A connection system for connecting external devices to a streamer. The connection system comprises three outer collars maintained collinearly aligned by a stabilizing member, such as a lightweight,...
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7599249 |
Cable motion detection
The present invention provides for cable motion detection. In one aspect of the instant invention, a method is provided for cable motion detection using orientation sensor. The method includes...
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7577060 |
Systems and methods for steering seismic arrays
Marine seismic survey systems and methods are presented. One system comprises a source array, a tow vessel, one or more source tow members, one or more deflecting members operatively connected to...
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7554880 |
Marine surveys
A method generates at least one route traversing a plurality of predetermined survey paths in a marine survey. The method includes generating a plurality of routes traversing a subset of the...
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7499373 |
Apparatus and methods for seismic streamer positioning
Apparatus, systems and methods for connecting two seismic streamers are disclosed that enable two streamers to be towed in a desired arrangement. One apparatus comprises an elongate member having a...
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7457193 |
Seismic source and source array having depth-control and steering capability
A marine seismic energy source includes a seismic tow cable configured to be towed by a vessel from one end and at least one seismic source coupled proximate another end of the tow cable. The at...
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7450467 |
Apparatus and methods for seismic streamer positioning
Systems and methods for positioning seismic streamers are disclosed that enable two or more streamers to be positioned in over/under configuration. One system comprises first and second pluralities...
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7443763 |
Full wave seismic recording system
The present disclosure generally relates to systems and methods for acquiring seismic data. In one exemplary embodiment, a method for acquiring seismic data is described in which recorder...
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7433264 |
Methods and systems for determination of vertical correction of observed reflection seismic signals
Methods and systems for determining position of seismic sources and receivers are disclosed. Signals received by a first antenna are processed to determine its 3D coordinate position. Signals...
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7400552 |
Methods and systems for efficiently acquiring towed streamer seismic surveys
Methods and systems for efficiently acquiring towed streamer marine seismic data are described. One method and system comprises positioning a plurality of source-only tow vessels and one or more...
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7391673 |
Method of wide azimuth seismic acquisition
According to a preferred aspect of the instant invention, there is provided a system and method for acquiring seismic data in a marine environment, wherein at least two source vessels are used in...
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7339852 |
Seismic acquisition system
A seismic acquisition system comprising a remote-controlled buoy for conducting seismic acquisition operations. The buoy comprises an operating system for operating a seismic wave production device...
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7313495 |
Method of processing marine magnetic gradient data and exploration methods using that data
A method of processing marine magnetic data is disclosed which comprises towing first and second magnetometers M1 and M2 behind a ship (10). Raw magnetic gradient data is obtained from the sensors...
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7224641 |
Sensor arrangement and method for the installation and moving of this
Arrangement for use for seismic surveys of geological formations in a seabed, where a plurality of such arrangements, which are provided with sensor units 26, are placed on the seabed for...
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7222579 |
Control system for positioning of marine seismic streamers
A method of controlling a streamer positioning device (18) configured to be attached to a marine seismic streamer (12) and towed by seismic survey vessel (10) and having a wing and a wing motor for...
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7221619 |
Fiber optic strain gauge and cable strain monitoring system for marine seismic acquisition systems
A method for operating a marine seismic survey system includes deploying from a seismic vessel at least two lead-in cables each functionally coupled at one end thereof proximate a respective...
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7206254 |
Underwater cable arrangements and devices
The present invention provides an underwater cable arrangement includes an underwater cable having one or more external devices mounted on the cable. In one form of the invention, the external...
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7203130 |
Methods for deriving shape of seismic data acquisition cables and streamers employing a force model
Methods and systems for determining position of one or more portions of a seismic streamer, which portions may be seismic receivers, are disclosed. One method includes measuring one or more...
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7196634 |
Systems for predicting earthquakes and methods of employing such systems
A method of predicting earthquakes includes the step of positioning a first transducer array adjacent to a seismically active region and below the water table, i.e., within the zone of saturation....
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7184365 |
Unitary multi-cable towing system
In one aspect the invention comprises a system and a method for marine geophysical exploration, which includes a first cable connected to a vessel and a plurality of streamer cables connected to...
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7167412 |
Apparatus for steering a marine seismic streamer via controlled bending
A marine seismic streamer steering device comprises at least two hinged sections pivotally coupled to each other and connected between two adjacent sections of the seismic streamer, and a bend...
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7050355 |
Determining the orientation of a seismic receiver, a seismic receiver, and a method or seismic surveying
The invention provides a method of determining the orientation of a seismic receiver (4, 6) from seismic data acquired at the receiver (4, 6). The determined orientation can be taken into account...
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7016260 |
Seismic data acquisition system using acquisition stations set on the sea bottom
The invention is a system designed for acquisition of seismic data by means of acquisition stations set on water bottom of a water body. The system comprises acquisition stations (DSAU) combining a...
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6985403 |
Control device for controlling the position of a marine seismic streamer
A control device (1) for controlling the position of a marine streamer comprising; an annular aerofoil (2), a mount (3) for mounting the annular aerofoil onto and around the streamer; and control...
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6975560 |
Geophysical method and apparatus
A method and apparatus is disclosed for performing a seismic survey below the surface of a body of water and on the seabed. In one embodiment, a plurality of seismic data receivers are removably...
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6932185 |
Acquisition method and device for seismic exploration of a geologic formation by permanent receivers set on the sea bottom
A method and device for seismic exploration of a subsea geologic formation by pickups set on the sea bottom and intermittently connectable to active data acquisition stations (11) brought nearby....
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6898146 |
Screwless inner race for streamer cable connector
An inner race for a streamer cable connector. The inner race includes first and second curved sections with a screwless fastener for clamping the two sections together about the streamer cable. The...
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6879542 |
Device for controlling navigation of a towed submarine object
A device that allows control of the navigation of a towed underwater device, such as a linear acoustic antenna. The device is equipped with a pair of horizontal wings and a pair of vertical wings....
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6775203 |
Seismic seabed cable with sensor units
A preferred seismic survey system includes a cable having a sensor unit. The sensor unit includes sensors for detecting acoustical energy (e.g., shear and/or pressure waves) and is disposed in a...
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