Abstract: A control device or “bird” for controlling the position of a marine seismic streamer is provided with an elongate, partly flexible body which is designed to be electrically and mechanically connected in series with a streamer. In its preferred form, the bird has two opposed wings which are independently controllable in order to control the streamer's lateral position as well as its depth.
Abstract: A technique includes obtaining data indicative of images of a marine seismic source event, which are acquired by underwater cameras and processing the data to determine an attribute (a seismic bubble volume or motion, as non-limiting examples) that is associated with the seismic source event.
Abstract: A method for generating synthetic seismic traces. The method includes receiving a hybrid model that includes geological and seismic data, where the geological data corresponds to a zone of interest and the seismic data corresponds to the zone of interest and adjacent areas of the zone of interest. The method may determine a plurality of reflection properties along a path for a trace location using data from the hybrid model. The method may then generate a synthetic seismic trace for the trace location using the plurality of reflection properties.
Abstract: Propagation of wavefields are simulated along paths in a survey environment, where the simulated propagation includes an influence of a reflection at an interface that causes ghost data in measured survey data. Deghosting of the measured survey data is performed using the simulated wavefields.
Abstract: An embodiment of the invention includes simultaneous drive signals whose respective phase angle offset(s) varies over a portion or duration of the simultaneous sweeps. Other embodiments are discussed herein.
Abstract: A method of analysing seismic data from a geological volume is provided. The geological volume is divided into a plurality of voxels. For each voxel a respective neighbourhood is defined which includes that voxel and a predetermined arrangement of neighbouring voxels. For each voxel, the respective normal vectors of a seismic attribute vector field derived from the seismic data are calculated. For each voxel, a respective local structure tensor based on the normal vectors of the voxels of the respective neighbourhood is calculated. For each voxel, the value of an expression which includes one or more of the eigenvalues (?1, ?2, ?3) of the respective local structure tensor is calculated. The method can be used for seismic surveying, or to manage operation of or drilling of a subterranean well.
Type:
Grant
Filed:
July 29, 2013
Date of Patent:
May 17, 2016
Assignee:
WESTERNGECO L.L.C.
Inventors:
Aicha Bounaim, Oda Roaldsdotter Ravndal, Jarle Haukås
Abstract: A method of processing seismic data acquired consequent to actuation of a seismic source is described. The method comprises taking the result of the following process into account when processing the seismic data where the process comprises estimating the effect of uncertainty in the position and/or orientation of the seismic source relative to the measuring receiver on processing the seismic data by estimating a source wavefield from data acquired by a near-field measuring receiver and from a first parameter set including at least one parameter indicative of the position and/or orientation of the seismic source relative to the measuring receiver, varying the value of at least one parameter of the first parameter set, estimating the source wavefield from the data acquired by the measuring receiver and from the varied first parameter set and obtaining information about the uncertainty in the estimate of the source wavefield.
Type:
Grant
Filed:
February 24, 2010
Date of Patent:
May 17, 2016
Assignee:
WESTERNGECO L.L.C.
Inventors:
Clement Kostov, Jon-Fredrik Hopperstad, Philip Kitchenside, Johan Olof Anders Robertsson, Karin Schalkwijk
Abstract: An embodiment of the invention includes combining pseudorandom sweeps with an independent, or nearly independent, survey acquisition technique. Targeted design of pseudorandom sweeps can direct the majority of cross-correlation noise to lie outside key time-lags of the record (i.e., windows of interest). Embodiments of the invention are described herein.
Type:
Grant
Filed:
March 22, 2012
Date of Patent:
May 17, 2016
Assignee:
WesternGeco L.L.C.
Inventors:
Timothy James Dean, Kambiz Iranpour, Pieter Leonard Vermeer, Claudio Bagaini
Abstract: Various implementations described herein are directed to a seismic survey using an augmented reality device. In one implementation, a method may include determining current location data of an augmented reality (AR) device in a physical environment. The method may also include receiving placement instructions for a first seismic survey equipment in the physical environment based on the current location data. The method may further include displaying the placement instructions in combination with a view of the physical environment on the AR device.
Type:
Grant
Filed:
October 2, 2014
Date of Patent:
May 3, 2016
Assignee:
WesternGeco L.L.C.
Inventors:
Robert Hughes Jones, Emmanuel Coste, Guillaume Daniel Tamboise, Dorin Rosu
Abstract: There is provided a method of interpolating wave signals, particularly seismic signals acquired through a seismic survey, using the steps of obtaining time series of measured wave signals; and selecting iteratively basis functions to represent said measured signals with a basis function being fully defined by n parameters, wherein in each iteration one or more basis functions are combined with the selected basis functions such that the residual between the measured signals and a representation of the measured signal by the combined basis functions is minimized at the locations of the measurement at each iteration.
Abstract: This invention discloses methods of processing data using a computer to separate out geophysical exploration response at receivers corresponding to one source among many sources by determining at least one spatio-temporal variant directional propagation attribute of the responses at receivers corresponding to the one source and by decomposition or filtering process using the determined attribute.
Abstract: A technique includes generating a data stream that contains data acquired by nodes of a subterranean survey data acquisition network and introducing data into the data stream, which describes an equipment failure that occurred in the network.
Abstract: Translational data acquired by at least one translational survey sensor is received, and rotation data is received. A representation of wavefield velocity based on the translational data and the rotation data is determined.
Abstract: An apparatus includes an array of seismic sensor units that are adapted to acquire measurements in connection with a land surface-based seismic survey. Each seismic sensor unit includes a particle motion sensor and a rotation sensor.
Abstract: A technique facilitates collection and use of data on subterranean formations. The technique comprises obtaining gravity measurements through the use of seismic streamers. At least one streamer is provided such that each streamer has multiple sensors, e.g. accelerometers. The at least one streamer is towed with a tow vessel, and gravity data are accumulated via the multiple sensors during towing.
Type:
Grant
Filed:
November 3, 2010
Date of Patent:
March 29, 2016
Assignee:
WESTERNGECO L.L.C.
Inventors:
Everhard Muyzert, Philip A. F. Christie, Nicolas Goujon, Julian Edward (Ed) Kragh, Johan O. A. Robertsson
Abstract: 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 streamer produces a turbulent flow. The streamer includes an inner cable that contains the particle motion sensors and a fluid containing layer to surround the inner cable to reduce noise otherwise sensed by the particle motion sensors due to the turbulent flow.
Type:
Grant
Filed:
April 17, 2009
Date of Patent:
March 22, 2016
Assignee:
WESTERNGECO L.L.C
Inventors:
Patrick Perciot, Lars Borgen, Oeyvind Teigen, Nicolas Goujon
Abstract: A technique includes estimating propagation parameters that are associated with a towed seismic survey based at least in part on seismic signal measurements and noise measurements.
Type:
Grant
Filed:
July 18, 2007
Date of Patent:
March 8, 2016
Assignee:
WesternGeco L.L.C.
Inventors:
Ahmet Kemal Ozdemir, Philippe Caprioli, Ali Ozbek, Johan Olof Anders Robertsson
Abstract: A method for use in a land-based seismic survey includes: transmitting a plurality of source control commands to a plurality of seismic sources over a VHF/IP network; and managing congestion on the VHF/IP network while transmitting the source control commands. In other aspects, a program storage medium encoded with instructions that, when executed by a processor, perform such a method and a computer programmed to perform such a method.
Type:
Grant
Filed:
November 8, 2008
Date of Patent:
March 1, 2016
Assignee:
WesternGeco L.L.C.
Inventors:
Guillaume J. D. Tamboise, Christin Rendalen, Tristan Hollande
Abstract: A technique includes receiving sensor acquired data, which includes pressure data representative of at least one pressure measurement of a wavefield and particle motion data representative of at least one particle motion measurement of the wavefield. The technique includes filtering the pressure data and the particle motion data with a plurality of directional filters to provide a plurality of filtered datasets. The filtered datasets are associated with different directional ranges. The technique includes estimating an angle of incidence for at least one of the directional ranges based at least in part on at least one of the filtered datasets; and processing the acquired data to determine at least one of an upgoing component of the wavefield and a downgoing component of the wavefield based at least in part on the at least one estimated angle of incidence.
Type:
Grant
Filed:
January 11, 2013
Date of Patent:
March 1, 2016
Assignee:
WesternGeco L.L.C.
Inventors:
Massimiliano Vassallo, Dirk-Jan Van Manen, Susanne Rentsch-Smith, Philip A. F. Christie
Abstract: 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 seismic streamer includes a streamer body having a length and a channel, a seismic sensor disposed within the channel, and a gel disposed within the channel. The gel has a complex viscosity of at least 50 Pascals and includes a concentration of a polymer between the range of about 5% and about 25% by weight. The method also includes placing a source in the body of water. The seismic streamer and the source are towed through the body of water and the source is fired while being towed through the body of water. Data is collected from the seismic streamer as it is towed through the body of water.
Type:
Grant
Filed:
December 14, 2012
Date of Patent:
February 23, 2016
Assignee:
WesternGeco L.L.C.
Inventors:
Gary John Tustin, Steven Antony Gahlings, Robert Hughes Jones