Matches 1 - 50 out of 158 1 2 3 4 >


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US20130077436 DEVICE AND METHOD TO DETERMINE SHAPE OF STREAMER  
A method for determining a shape of a streamer to be towed under water for collecting seismic data. The method includes receiving a velocity model for the subsurface; selecting a first profile for...
US20110182140 SEISMIC SYSTEM WITH GHOST AND MOTION REJECTION  
An underwater seismic system for reducing noise due to ghost reflections or motion through the water from seismic signals. The system includes two motion sensors. One sensor has a first response...
US20080043573 Generalized 3D Surface Multiple Prediction  
A method and apparatus for predicting a plurality of surface multiples for a plurality of target traces in a record of seismic data. In one embodiment, the method includes creating a file...
US20130329521 VARIABLE DEPTH STREAMER SRME  
Methods and systems for variable wavelet correction are described. A variable depth dataset is deghosted before presentation to a multiples prediction step of multiples elimination model. In...
US20130176818 VARIABLE DEPTH STREAMER SRME  
Methods and systems for variable wavelet correction are described. A variable depth dataset is deghosted before presentation to a multiples prediction step of multiples elimination model. In...
US20130121109 METHOD AND SYSTEM FOR SEPARATING SEISMIC SOURCES IN MARINE SIMULTANEOUS SHOOTING ACQUISITION  
Seismic data are obtained by recording simultaneously in seismic streamers, acquired by activating approximately simultaneously two or more seismic sources towed at two positions in the vicinity...
US20110176385 DUAL-SENSOR NOISE-REDUCTION SYSTEM FOR AN UNDERWATER CABLE  
A system and a method for rejecting noise in an underwater sensor cable, such as a towed streamer or an ocean-bottom cable. An adaptive hydrodynamic model of the cable produces an estimated sensor...
US20130148468 NOISE REDUCTION SYSTEMS AND METHODS FOR A GEOPHYSICAL SURVEY CABLE  
A disclosed geophysical survey cable includes a signal amplifier coupled between two electrodes spaced apart along the length of the geophysical survey cable (the electrodes being coupled to the...
US20110038228 METHOD OF MARINE TIME-LAPSE SEISMIC SURVEYING  
A method of marine time-lapse seismic surveying of a subsurface formation, comprises providing a baseline survey, providing a monitor survey that includes information about changes in the...
US20140198613 SYSTEM AND METHOD FOR THE REMOVAL OF SHALLOW WATER MULTIPLES USING A HYBRID MULTI-CHANNEL PREDICTION METHOD  
A system and method are provided for determining shallow water multiples when seismically exploring a geographical area of interest under a body of water. The system and method estimate a...
US20120026830 METHODS AND SYSTEMS TO ELIMINATE UNDESIRABLE VARIATIONS IN TIME-LAPSE SEISMIC SURVEYS  
Device and method for processing 4-dimensional (4-D) seismic traces. The method includes receiving at least two vintages of seismic traces recorded by seismic receivers for a same subsurface area,...
US20130322205 Seismic Surveying Techniques with Illumination Areas Identifiable from Primary and Higher-Order Reflections  
Techniques are disclosed relating to determining or executing a survey pattern for a marine seismic survey vessel. The survey pattern may be determined based on a determined subsurface...
US20150241585 ADJUSTABLE SENSOR STREAMER STRETCH SECTION FOR NOISE CONTROL FOR GEOPHYSICAL SENSOR STREAMERS  
A sensor streamer stretch section includes at least one spring. A means for coupling the spring at each end to at least one of a sensor streamer and a lead in cable is included. A cable is coupled...
US20140288891 SYSTEM AND METHOD FOR MODELLING THREE DIMENSIONAL SHALLOW WATER MULTIPLES USING PREDICTIVE SEA FLOOR RECONSTRUCTION  
A method for modeling shallow water multiples modeling using a predicted sea floor reconstruction is provided. A seafloor reflectivity image is reconstructed using acquired seismic data. Surface...
US20120259553 Method for eliminating spectral constraints of acquisition system and earth filtering effects  
Recorded seismic data are represented as a convolution of operators representing a reflectivity series of the earth and a seismic wavelet. The recorded seismic wavelet is represented as a...
US20130201791 METHOD AND SYSTEM FOR DETERMINING SOURCE SIGNATURES AFTER SOURCE GHOST REMOVAL  
Seismic data are acquired using a seismic source comprising a plurality of seismic sub-sources disposed in a body of water at a plurality of depths and activated with different time delays....
US20130343155 SYSTEM AND TECHNIQUE TO SUPPRESS THE ACQUISITION OF TORQUE NOISE ON A MULTI-COMPONENT STREAMER  
A technique includes distributing particle motion sensors along the length of a seismic streamer. Each particle motion sensor is eccentrically disposed at an associated angle about an axis of the...
US20110103181 System and Technique to Suppress the Acquisition of Torque Noise on a Multi-Component Streamer  
A technique includes distributing particle motion sensors along the length of a seismic streamer. Each particle motion sensor is eccentrically disposed at an associated angle about an axis of the...
US20140153363 SYSTEMS AND METHODS FOR REMOVAL OF SWELL NOISE IN MARINE ELECTROMAGNETIC SURVEYS  
Methods and systems for determining and removing swell noise from electric field data collected from streamers towed at different are disclosed. In one aspect, a first set of streamers called...
US20100074049 MARINE SEISMIC ACQUISITION METHOD AND SYSTEM  
An elongate body for parenteral injection at low velocity from a device is described. The body has at least one pointed end and comprises at least one active material. In addition, the body has a...
US20110063948 Method for combining signals of pressure and particle motion sensors in marine seismic streamers  
A cross-line slowness is determined for each sample in the signals in towed marine seismic streamers. A range of assumed cross-line slownesses is selected. Vertical wavenumbers are determined...
US20130329520 Surface-Related Multiple Elimination For Depth-Varying Streamer  
Techniques are described for predicting surface-related multiples from measurements performed at varying depths. One or more operations, such as wavefield decompositions and/or extrapolations, may...
US20090323467 SYSTEM AND TECHNIQUE TO OBTAIN STREAMER DEPTH AND SHAPE AND APPLICATIONS THEREOF  
A technique includes obtaining first measurements acquired by sensors of a towed seismic streamer, which are indicative of an inclination of the streamer. Based at least in part on the...
US20090238036 DETERMINING DIRECTIONAL PROPAGATION ATTRIBUTES OF A SEISMIC EVENT  
A technique includes obtaining seismic data acquired by at least one seismic sensor. The technique includes processing the seismic data to determine a value that is indicative of a...
US20140064027 HORIZONTAL STREAMER BROADBAND MARINE SEISMIC ACQUISITION CONFIGURATION AND PROCESSING  
A method for de-ghosting marine seismic trace data is described. A reference seismic trace and a candidate seismic trace are selected from acquired seismic data. The acquired seismic data is...
US20090222211 METHOD, PROGRAM PRODUCT, AND SYSTEM FOR SUPPRESSION OF RESIDUAL WATER BOTTOM ENERGY IN SURFACE SEISMIC DATA  
Systems, program product, and methods of suppressing residual water bottom energy in seismic data, are provided. An example of a system, program product, and method can be applied to post-stack...
US20110103183 System and Technique to Increase the Spacing of Particle Motion Sensors on a Seismic Streamer  
A technique includes receiving data indicative of non-uniformly spaced samples of particle motion wavefield acquired by particle motion sensors while in tow. The samples are spaced apart by an...
US20120033527 FAST 3-D SURFACE MULTIPLE PREDICTION  
A method and apparatus for predicting a plurality of surface multiples for a plurality of traces in a record of seismic data. In one embodiment, the method includes providing a plurality of target...
US20130322208 METHODS AND SYSTEMS FOR IMAGING SUBTERRANEAN FORMATIONS WITH PRIMARY AND MULTIPLE REFLECTIONS  
Systems and methods for imaging subterranean formations using primary and multiple reflections are described. An exploration-seismology vessel tows a seismic source, a receiver acquisition surface...
US20100124149 Method of wavefield extrapolation for single-station, dual-sensor towed streamer signals  
A time-dependent arrival angle is determined at a single receiver station in a towed streamer. Up-going and down-going pressure wavefields are calculated from pressure and vertical particle...
US20140286128 SYSTEMS AND METHODS FOR PERFORMING DUAL-SCALE INTERPOLATION  
Systems and methods are provided for processing seismic data and displaying an output associated with the seismic data. A method includes: separating the seismic data into a fine-scale dataset and...
US20130100767 SEISMIC ACQUISITION USING SOLID STREAMERS  
An embodiment of the disclosed invention includes a method for attenuating noise during acquisition of marine seismic date. The method includes placing a seismic streamer in a body of water. The...
US20150241588 Determining An Orientation Angle of A Survey Sensor  
Measurement data acquired by at least one sensor in a cable structure towed through a body of water is received. A torsional vibration noise component in the measurement data is estimated. The...
US20130028050 DETERMINING AN ORIENTATION ANGLE OF A SURVEY SENSOR  
Measurement data acquired by at least one sensor in a cable structure towed through a body of water is received. A torsional vibration noise component in the measurement data is estimated. The...
US20120039149 Method for separating seismic sources in marine seismic surveys  
An operator is applied in a frequency domain to multiple source seismic data acquired in a marine survey, with multiple sources substantially horizontally collocated and at different depths, to...
US20130279291 ACQUIRING NEAR-ZERO OFFSET SURVEY DATA  
To acquire near-zero offset survey data, a survey source and a first streamer attached to the survey source are provided, where the first streamer has at least one survey receiver. A second...
US20060133202 Motion sensors in a marine seismic streamer  
An apparatus is disclosed for determining particle motion in a body of water. The apparatus includes a cable adapted to be towed in the water by a vessel. A first sensor responsive to particle...
US20090296521 NOISE REDUCTION IN PARTICLE MOTION SENSING SEISMIC STREAMER  
An apparatus includes particle motion sensors and a streamer that contains the particle motion sensors. The streamer is to be towed in connection with a seismic survey, and the towing of the...
US20130294195 SEISMIC STREAMER SYSTEM AND METHOD  
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...
US20130182533 ATTENTUATING NOISE ACQUIRED IN AN ENERGY MEASUREMENT  
A technique includes receiving data corresponding to at least one measurement of energy produced by a shot of an energy source; and transforming the received data to a domain that is sensitive to...
US20110085414 Flexural Wave Attenuation  
A seismic information processing method and apparatus includes attenuating flexural wave noise information from seismic information. Flexural wave information removal includes receiving the...
US20140369164 REMOVING NOISE FROM A SEISMIC MEASUREMENT  
A technique includes spatially filtering a signal that is derived from a seismic acquisition. The filtering is associated with a filter length, and the filtering includes varying the filter length...
US20110103182 Removing Noise from a Seismic Measurement  
A technique includes spatially filtering a signal that is derived from a seismic acquisition. The filtering is associated with a filter length, and the filtering includes varying the filter length...
US20100135114 WAVEFIELD EXTRAPOLATION MODELING FOR INTERNAL MULTIPLE PREDICTION  
Methods for attenuating multiple reflections in seismic data by predicting the multiples using wavefield extrapolation modeling, which uses one-way wavefield propagation in both the up and down...
US20110051551 Sensor grouping for dual sensor marine seismic streamer and method for seismic surveying  
A method for marine seismic surveying includes towing a streamer in a body of water. The streamer includes a plurality of spaced apart sensor groups, each including a plurality of longitudinally...
US20120163119 COMBINATION MOTION AND ACOUSTIC PIEZOELECTRIC SENSOR APPARATUS AND METHOD OF USE THEREFOR  
Sensors used in mapping strata beneath a marine body are described, such as used in a flexible towed array. A first sensor is a motion sensor including a conductive liquid in a chamber between a...
US20150198730 SEISMIC IMAGE ACQUISITION USING GHOST COMPENSATION IN KIRCHHOFF MIGRATION  
Methods and systems for ghost compensation of seismic data in conjunction with Kirchhoff migration are described. Input traces are deghosted by applying a deghost operator thereto across a range...
US20140198612 GHOST COMPENSATION IN BEAM MIGRATION  
Methods and systems for ghost compensation which are embedded in beam migration are described. The ghost compensation is based on the fact that the beam migration is performed in the slant-stack...
US20090251992 Method for deghosting marine seismic streamer data with irregular receiver positions  
Seismic data are obtained for each seismic source activation in a marine streamer and for each frequency, after being transformed to a spectral domain. An iterative conjugate gradient scheme,...
US20100124148 Method for optimum combination of pressure and particle motion sensors for a 3-D spread of dual-sensor marine seismic streamers  
A method for determining upgoing pressure components of seismic signals from signals detected by combined pressure responsive sensors and motion responsive seismic sensors disposed in a plurality...

Matches 1 - 50 out of 158 1 2 3 4 >