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7586809 |
Underwater sensor and data sensing and recording apparatus
The apparatus has a sensor disposed on the first end of an elongate connector by means of fixed interface link. A recorder unit is disposed on the second end of the connector opposite the first...
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7573781 |
Streamer cable with enhanced properties
The present invention relates to streamer cables. One embodiment of the present invention relates to a method for preparing a streamer cable. The method may comprise retrofitting the streamer cable...
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7558155 |
Optical sensor interrogation with wavelength grouping in time slots
Seismic sensor systems and sensor station topologies, as well as corresponding cable and sensor station components, manufacturing and deployment techniques are provided. For some embodiments,...
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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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7539081 |
Seabed resource exploration system and seabed resource exploration method
A seabed resource exploration system includes: a vibrator 1 for transmitting a sound wave into the sea and receiving a scattered wave in which the sound wave is reflected on a boundary surface...
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7539080 |
Grating design for use in a seismic sensing system
Seismic sensor systems and sensor station topologies, as well as corresponding cable and sensor station components, manufacturing and deployment techniques are provided. For some embodiments,...
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7535800 |
Seismic imaging and tomography using seabed energy sources
In-sea seismic energy sources, deployed at or near the seabed, generate seismic waves in earth formations beneath the seabed when activated by a triggering mechanism at a precise time synchronized...
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7518948 |
Marine seismic streamer having soluble encapsulant surrounding seismic sensors therein
A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends along the length of the streamer and is disposed inside the jacket. At least one...
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7505361 |
Method for prediction of surface related multiples from marine towed dual sensor seismic streamer data
Particle motion sensor signals and the pressure sensor signals data from a towed marine seismic streamer are combined to generate an up-going pressure wavefield component and a down-going particle...
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7483335 |
Permanently installed seismic ocean bottom cable
A seismic ocean bottom cable array is provided for use in subsurface exploration. The array includes receiver stations for measuring seismic signals, and a cable including conductors for data...
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7466627 |
System and method for wireless data collection from seismic recording buoys
A seismic data acquisition telemetry system includes a seismic vessel including a data recording system thereon. The system includes a seismic data gathering unit in operative connection with at...
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7466625 |
Noise estimation in a vector sensing streamer
A method includes recording a first set of data using a first type of sensor; recording a second set of data using a second type of sensor, the first and second sets of data being contemporaneously...
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7466624 |
Armored seabed laid seismic cable and method and apparatus for manufacturing same
A method for wrapping continuous strands of steel wire about a seismic cable including interconnected sensor sections and conductor sections where a cross sectional diameter of the sensor section...
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7463549 |
Apparatus and method for carrying out seismic surveys
A 4D seismic source comprising a series of sub-arrays of guns on flotation devices. Each flotation device has a GPS device. For firing, the guns in the e.g. three sub-arrays identified as being...
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7450468 |
Methods, systems, and computer readable media for interactively determining parameters for ocean-bottom hydrophone/geophone receiver combination deghosting
Methods, systems, and computer readable media are provided for interactively determining optimum deghosting parameter values for suppressing ghost reflections. Seismic data are obtained from...
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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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7426439 |
Method and apparatus for marine seismic data acquisition
The present invention provides a method and apparatus for seismic data acquisition. One embodiment of the method includes accessing data acquired by at least two particle motion sensors. The data...
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7409919 |
Self propelled cleaning device for marine seismic streamers
A cleaning device for a seismic streamer includes a housing placeable the exterior of the streamer. A turbine is associated with the housing and is configured to be rotationally driven by movement...
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7359283 |
System for combining signals of pressure sensors and particle motion sensors in marine seismic streamers
Signals of pressure sensors and particle motion sensors located in marine seismic streamers are combined to generate pressure sensor data and particle motion data with substantially the same broad...
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7359282 |
Methods and apparatus of source control for borehole seismic
A method and apparatus for controlling seismic sources. The method and apparatus enable firing of a seismic sources at either a precise time or a precise position of the seismic source. Controlling...
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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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7336561 |
System for attenuation of water bottom multiples in seismic data recorded by pressure sensors and particle motion sensors
An up-going wavefield and a down-going wavefield are calculated at a sensor position from a pressure sensor signal and a particle motion sensor signal. Then, an up-going wavefield is calculated at...
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7336560 |
Method for determination of sufficient acquisition coverage for a marine seismic streamer survey
Seismic data sets representative of a marine seismic streamer survey are constructed with test coverage holes in the data sets. The data sets are processed and data quality degradation in the...
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7324406 |
Sensor arrangement for seismic waves
A sensor arrangement is provided for use in the seismic investigation of geological formations below the seabed. A plurality of sensor nodes ( 20 ) are provided and are positioned gfor deployment...
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7321526 |
Method and apparatus for water velocity decomposition
The present invention provides a method for analyzing traces collected along a plurality of adjacent sail lines in a marine seismic survey area. The method comprises selecting a plurality of trace...
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7319636 |
Calibration of pressure gradient recordings
A method for computing a pressure signal gradient. The method includes recording a plurality of pressure signals at least one of a first receiver and a second receiver. The first receiver and the...
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7286442 |
Method and apparatus for seismic data acquisition
A marine seismic exploration method and system comprised of continuous recording, self-contained ocean bottom pods characterized by low profile casings. An external bumper is provided to promote...
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7257049 |
Method of seismic surveying, a marine vibrator arrangement, and a method of calculating the depths of seismic sources
A method of seismic surveying comprises emitting seismic energy at two or more different depths during a sweep. In one embodiment, the depth of a seismic source is varied during a sweep, by raising...
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7239577 |
Apparatus and methods for multicomponent marine geophysical data gathering
In one embodiment the invention comprises a particle velocity sensor that includes a housing with a geophone mounted in the housing. A fluid that substantially surrounds the geophone is included...
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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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7221620 |
Apparatus for seismic measurements
An apparatus for three-dimensional single-channel seismic measurements, wherein at least one seismic source and hydrophone devices are towed behind a vessel, and a pair of submerged deflectors are...
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7218572 |
Method of seismic source monitoring using modeled source signatures with calibration functions
Physical parameters are measured for an array of seismic sources, preferably for each activation of the seismic sources. Calibration functions are obtained and the measured physical parameters and...
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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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7164619 |
Method of processing marine seismic data and a method of seismic surveying
A method of determining seismic properties of a layer of the seabed, in particular a surface or near-surface layer ( 5 ), comprises directing seismic energy propagating in a first mode at a...
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7145833 |
Cleaning device for marine seismic streamers
A seismic streamer cleaning device includes a means for converting motion of water past a seismic streamer into movement of the device as the streamer is towed through the water. A cleaning element...
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7132952 |
Security system for a portable article
The combination of a portable article and a security system. The security system has a flexible element/tether with a length. The flexible element/tether is connected between the portable article...
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7120087 |
Electronics-carrying module
An electronic-carrying module ( 640 ), for example for use with a seismic data acquisition cable ( 400 ), is disclosed. The preferred electronic-carrying module ( 640 ) includes, first, an...
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7104728 |
Method for deploying seafloor equipment
A method for deploying and retrieving seafloor equipment modules is disclosed. A conveyor has a fixed end and a free end. The conveyor is deployed into a body of water until the free end reaches,...
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7068568 |
Method of processing seismic data
A method of de-ghosting seismic data acquired in a marine seismic survey comprises estimating ∂ z p (where p is the fluid pressure) from a time-derivative of p and a derivative of p in a...
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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...
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7042803 |
Marine seismic source towing apparatus and method
A marine acoustic source system has relativley densely packed energy sources arrayed in a tandem-like fashion along a horizontal plane. Preferably, a longitudinal axis of each source lies...
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7042801 |
System for geophysical prospecting using induce electrokinetic effect
Methods are disclosed employing seismic waves having infrasonic frequencies in the range of about 0.1–20 Hz for generating electromagnetic waves of similar infrasonic frequency in hydrocarbon...
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7031223 |
Method for correcting seismic data for receiver movement during data acquisition
A method is disclosed for processing seismic data. The method includes determining a position of a seismic energy source and seismic receivers at a time of actuation of the source. A velocity of...
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7016261 |
Deep penetrating focused array
Disclosed herein is a single point seismic system comprising an array of air guns disposed within a frame. The array includes a cluster of air guns on one of its ends and a reduction in chamber...
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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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6992951 |
Permanent seafloor seismic recording system utilizing micro electro-mechanical systems seismic sensors and method of deploying same
Provided is a permanent seafloor seismic recording system utilizing Micro Electro-Mechanical Systems seismic sensors. The system includes and expandable backbone, multiple hubs and sensor lines....
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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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6961284 |
Source array for use in marine seismic exploration
A staggered vertical marine seismic source contains upper and lower arrays ( 10, 11 ) of emitters of seismic energy (S11, S12; S21, S22). The upper array ( 10 ) is horizontally displaced relative...
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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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6906982 |
Marine time-lapse seismic surveying
A method for making a time-lapse seismic survey in a marine environment, the method designed to eliminate multiple surface reflections and changes in sea state and conditions. Seismic sources and...
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