Class / Patent application number | Description | Number of patent applications / Date published |
367019000 | Transducer cable location determination | 37 |
20080304358 | Method of Assisting The Deployment/Retrieval of Linear Acoustic Antennas Towed By A Vessel, During The Course of Which Distance-Measuring Means Carried By The Antennas Communicate with One Another - A method of assisting the deployment/retrieval of linear acoustic antennas towed by a vessel, said linear antennas each having geophysical data sensors, means for measuring the distance of at least one adjacent linear antenna, during the course of which at least one of said linear acoustic antennas has at least longitudinal mobility in relation to said vessel, including: at least one phase for configuring cells (Cn) each defined by a central position corresponding to a distance-measuring means (T), and by at least one peripheral position corresponding to another distance-measuring means (T) in proximity to said distance-measuring means (T) for said central position, reference distances between said central positions and said peripheral positions being predetermined; and at least one phase for controlling said central and peripheral positions with respect to said reference distances, by establishing communication between at least some of said distance-measuring means (T). | 12-11-2008 |
20090092005 | CONTROLLING SEISMIC SOURCE ELEMENTS BASED ON DETERMINING A THREE-DIMENSIONAL GEOMETRY OF THE SEISMIC SOURCE ELEMENTS - To control a seismic source having plural seismic source elements, a three-dimensional geometric shape of the plural seismic source elements is determined. Timings of activation of the plural seismic source elements is adjusted according to the determined three-dimensional geometric shape. | 04-09-2009 |
20090092006 | SEISMIC STREAMER PLATFORM - A technique includes designing a streamer, which includes a cable and seismic sensors based at least in part on a relationship between vibration noise and a bending stiffness of the cable. | 04-09-2009 |
20090097355 | METHOD FOR SIMULATING THE POSITIONING OF AT LEAST ONE STREAMER COMPRISING A STEP FOR PREDICTING THE CURRENT ON AT LEAST TWO DISTINCT POINTS OF THE STREAMER - A method for simulating the positioning of at least one acoustic linear antenna towed in a study zone is provided. The method includes at least one simulation step of at least one future position of at least one point of the acoustic linear antenna(e), at least one step for predicting the temporal and spatial variations of at least one marine current likely to interact with the acoustic linear antenna(e) and at least one step for determining the form of the acoustic linear antenna(e) by the resolution of a hydrodynamic model. The prediction step(s) include an upstream phase for determining a current at at least two determined points of the zone; a simulation phase of at least one future position of the determined points; a temporal projection phase of the current determined during the upstream phase at each future position; and a spatial projection phase of the currents at at least two distinct points of the acoustic linear antenna(e) occupying future position(s) of the simulation step. | 04-16-2009 |
20090231953 | 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 of the rigid floating body to determine 3D offset in the coordinate reference frame of the first point to any point on or rigidly attached to the body; applying a 3D coordinate shift from the first point to a second point rigidly attached to the body, thus determining coordinates of the second point in the desired reference frame; determining a distance from the second point to one or more devices that are components of a seismic acquisition spread, by comparing transmission times of a signal to recording times of transmitted signals and multiplying by a signal propagation rate; and determining relative positions of components of the spread to each other and to devices rigidly attached to the rigid body. | 09-17-2009 |
20090268552 | Methods of Range Selection for Positioning Marine Seismic Equipment - A method for selecting a signal arrival for determining an accurate position of seismic equipment includes the steps of transmitting a signal from a pinger; predicting a direct arrival and a reflected arrival of the signal at a receiver, wherein each arrival is the time between the transmission of the signal to reception of the signal; measuring arrivals of the signal at the receiver; selecting the measured signal arrival that is similar to the predicted direct arrival as a preliminary signal arrival; defining a confidence interval for the actual direct arrival of the signal based on the predicted direct arrival and the predicted reflected arrival; and finalizing the signal arrival, wherein the selected preliminary signal arrival is the finalized signal arrival if it is within the confidence interval. | 10-29-2009 |
20090285051 | SENSING AND ACTUATING IN MARINE DEPLOYED CABLE AND STREAMER APPLICATIONS - Methods and related systems are described for use with hydraulic fracturing and other oilfield applications. A tool body is positioned in a wellbore at a location near a subterranean rock formation being fractured. The tool body contains a plurality of deployable continuous fibers. At least some of the deployable continuous fibers are deployed into fractures within a subterranean rock formation. Each deployed fiber is continuous from the tool body to the rock formation. The number of deployable continuous fibers provides sufficient redundancy to make at least a target measurement relating to the fracturing process. | 11-19-2009 |
20090290447 | Measuring Electromagnetic Source Geometry - An electromagnetic source for electromagnetic survey of a subsea formation includes a towfish configured to be towed by a surface vessel; a plurality of electrodes attached to the towfish; and an acoustic ranging system having acoustic components individually attached to each of the towfish and the plurality of electrodes, wherein the acoustic ranging system is configured to determine a geometry of the plurality of electrodes. | 11-26-2009 |
20090296519 | DETERMINING POSITIONING OF SURVEY EQUIPMENT USING A MODEL - To performing positioning of survey equipment, measurements of acoustic signals reflected from at least one boundary of a marine environment are received. The reflected acoustic signals are reflected from the at least one boundary in response to acoustic signaling originated by an acoustic source. A positioning model is updated based on the measurements of the acoustic signals, wherein the positioning model contains information relating to positions of components of a positioning system that includes the acoustic source and acoustic receiver | 12-03-2009 |
20090316525 | MARINE SEISMIC STREAMER SYSTEM CONFIGURATIONS, SYSTEMS, AND METHODS FOR NON-LINEAR SEISMIC SURVEY NAVIGATION - Methods for determining by acoustic ranging relative positions of marine seismic streamers in a network of streamers are described, as well as streamer configurations and systems which overcome weak or non-existent acoustic positioning signals. The acoustic network includes a plurality of acoustic transceiver pairs, and the methods include implementing a network solution-based reconfiguration of the acoustic transceiver pairs. When the network of streamers changes more than a critical amount, the network is reconfigured, the critical amount being when the network solution-based reconfiguration is no longer adequate to provide enough acoustic signals to give reasonable relative positions of the acoustic transceiver pairs in the network due to their spatial relation. | 12-24-2009 |
20090323467 | 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 measurements, a shape of the streamer while in tow is determined. | 12-31-2009 |
20100002537 | PERFORMING QUALITY CONTROL WITH RESPECT TO POSITIONING OF SURVEY HARDWARE - To perform quality control with respect to positioning of survey hardware, survey navigation data is acquired regarding components of the survey hardware used to perform a survey operation with respect to a subterranean structure. Error statistics according to the survey navigation data are determined in real time. An action is effected in response to the error statistics. | 01-07-2010 |
20100002538 | DETERMINING THE STRUCTURE OF A TOWED SEISMIC SPREAD ELEMENT - A technique includes obtaining a plurality of sets of measurements of distances between nodes located on a seismic spread element while the element is in tow. Each set is acquired in response to the operation of a different set of sources. The technique includes determining a three-dimensional structure of the seismic spread element while in tow based at least in part on the sets of measurements. | 01-07-2010 |
20100074050 | Determining a Position of an Object of a Positioning Network Associated with a Marine Survey Arrangement - To determine a position of an object in a positioning network associated with a marine survey arrangement, images of targets on the object in the positioning network are captured with a plurality of cameras. Based on known positions of the plurality of cameras and known separation between the targets, positions of the targets are computed by processing the images. A position of the object is derived based on the positions of the targets. | 03-25-2010 |
20100172207 | DETERMINING THE INLINE RELATIONSHIP OF NETWORK NODES IN A SUBTERRANEAN SURVEY DATA ACQUISTION NETWORK - A system includes a subterranean survey data acquisition network and a processor. The network has first nodes that are distributed along a length of the network between a first end of the network and a second end of the network. Each of the first nodes is capable of being either in a state in which the first node is transparent to the network or in a state in which the first node is visible to the network. The processor is adapted to communicate with the closest visible first node relative to the first end, and the processor is adapted to, based on the communication, determine whether the closest visible first node is the closest first node of all of the first nodes relative to the first end. | 07-08-2010 |
20100202249 | PARTICLE MOTION SENSOR-BASED STREAMER POSITIONING SYSTEM - A technique includes disposing a particle motion sensor on a spread of at least one streamer and using the particle motion sensor to acquire a measurement of a signal, which is transmitted from an acoustic transmitter. The technique includes determining a heading of the particle motion sensor based at least in part on the measurement. | 08-12-2010 |
20100329075 | METHOD FOR ASSISTANCE IN THE LOCALIZATION OF TOWED STREAMERS COMPRISING A STEP FOR DEFINING AND A STEP FOR GENERATING DISTINCT ACOUSTIC CYCLES - A method for assistance in the localization of streamers towed by a vessel including at least one onboard acoustic controller, each streamer having: geophysical data sensors; acoustic means for measuring distance from at least one adjacent linear antenna; and means for the absolute localization of said antennas. The method includes at least one phase for the generating an acoustic cycle determining sequences and at least one phase for defining at least two distinct acoustic cycles representing a theoretical geometry capable of representing the shape of said streamers; at least one step for determining the real geometry of said streamers; at least one step for detecting a change in real geometry followed by a step for generating a new acoustic cycle, selected from among those defined during said phase for defining and adapted to said change in real geometry. | 12-30-2010 |
20110116343 | Positioning a Seismic Acquisition System Using Electromagnetic Signals - An apparatus includes a towed seismic acquisition system and a ranging system. The ranging system is adapted to use electromagnetic ranging signals to indicate a location of one or more points on the towed seismic acquisition system. | 05-19-2011 |
20110122724 | POSITION DETERMINATION OF A SEISMIC SOURCE ARRAY - A method of obtaining information about the positions of sources in a marine seismic source array that has N seismic sources, including at least N | 05-26-2011 |
20110122725 | POSITION DETERMINATION OF A SEISMIC SOURCE ARRAY - A method of obtaining information about the positions of sources in a marine seismic source array, comprises: determining respective notional signatures for m selected seismic sources, where m05-26-2011 | |
20110149682 | Method and apparatus for positioning of seismic cables - The present invention provides a method and apparatus for determining the position of a seismic cable being used to perform a marine seismic survey. The apparatus includes at least one seismic sensor and a plurality of sources deployed in a manner that is structurally independent of the seismic sensors and adapted to provide a positioning signal distinguishable from a seismic survey signal to the seismic sensors. | 06-23-2011 |
20120134234 | Declination Compensation For Seismic Survey - In seismic survey for icy waters, streamers are towed behind a vessel under the water's surface to avoid ice. GPS readings may not be consistently obtained because the ice prevents a tail buoy with a GPS receiver from trailing from streamer at the surface. Instead, a device tows on the streamer under the water's surface. The streamer's absolute position is tracked by intermittently bringing the towed device toward the surface so GPS readings can be obtained. The streamer's absolute position can then be used in conjunction with compass readings and can correlate various seismic sensor signals obtained along the streamer during the survey. The compass readings can be corrected for declination using declinometer readings, which can be compensated for iron effects from the vessel or other device carrying the declinometer. | 05-31-2012 |
20120147700 | Determining Streamer Depth and Sea Surface Profile - A technique includes receiving data indicative of acoustic measurements acquired by receivers disposed on a seismic receiver spread including at least one streamer. The technique includes processing the data in a machine to determine a depth and/or shaped of the spread. | 06-14-2012 |
20120195163 | Determining a Streamer Position - A technique includes receiving data acquired by a seismic sensor on a spread of at least one streamer. The data are indicative of a seismic source signature that is produced by a source seismic to penetrate into the Earth to acquire geophysical information in connection with a seismic survey. The technique includes processing the data to determine a position on the streamer relative to a reference position not disposed on the streamer. | 08-02-2012 |
20120230150 | Method for determining positions of sensor streamers during geophysical surveying - The geodetic position of a point on a streamer towed by a vessel in a body of water may be determined. Geodetic positions of a plurality positions along at least two of a plurality streamers towed in the body of water may be determined. Positions may be selected from the plurality of positions. Distances between pairs of the selected positions and between each of the selected positions and the point may be determined. Geodetic position of the point may be determined using the geodetic positions and distances. | 09-13-2012 |
20120300582 | SYSTEM FOR DOPPLER POSITIONING OF SEISMIC SENSORS AND METHOD - Method and system for determining positions of underwater sensors. The method includes sending a Doppler variant signal from a moving source; recording the signal with the at least one seismic sensor; evaluating a frequency drift of the recorded signal; and determining a position of the at least one seismic sensor based on the evaluated frequency drift and a source movement relative to the at least one sensor. | 11-29-2012 |
20120327741 | DATA COLLECTION SYSTEM, MARINE SEISMIC SURVEY SYSTEM AND METHOD OF ESTIMATING A CORRECTED SOUND SPEED - A data collection system | 12-27-2012 |
20130121107 | DEVICE AND METHOD FOR DETERMINING SEISMIC OFFSET IN MARINE ACQUISITION - Computing device and method for generating an image of a subsurface. The method calculates an offset shift of measured offsets between a seismic source and plural receivers of a streamer. The method includes receiving seismic data recorded underwater by the plural receivers; selecting two pairs of traces from the plural traces and for each pair, calculating a quantity Y that depends on measured offsets of receivers for which the traces were selected, and a quantity X that depends on travel-times and the measured offsets of the receivers for which the traces were selected; calculating a linear relation Y=aX+b, where “a” is a constant and “b” is related to the offset shift; estimating the offset shift from “b”; correcting the measured offsets of the receivers based on the offset shift; and calculating the image of the subsurface based on the corrected offsets. | 05-16-2013 |
20130155807 | METHOD FOR DETERMINING POSITIONS OF SENSOR STREAMERS DURING GEOPHYSICAL SURVEYING - A method for determining geodetic position of at least one point on a geophysical sensor streamer towed by a vessel in a body of water includes determining geodetic positions of a plurality of locations along a first geophysical sensor streamer towed at a first depth in the body of water. A lateral offset is caused between the first geophysical sensor streamer and a second geophysical sensor streamer towed at a second depth in the body of water. A distance is measured between at least two selected points along the first geophysical sensor streamer and a selected point along the second geophysical sensor streamer. A depth is measured at at least one point along the second geophysical sensor streamer. A geodetic position is determined at a selected point along the second geophysical sensor using the depth measurement, a direction of the lateral offset and the measured distances. | 06-20-2013 |
20130155808 | Method and Device for Estimating an Inter-node Distance Between Nodes Arranged Along Towed Acoustic Linear Antennas - A method and apparatus are provided for estimating an inter-node distance between a sender node and a receiver node belonging to a network comprising a plurality of nodes arranged along towed acoustic linear antennas. An acoustic signal is transmitted from the sender node to the receiver node through an underwater acoustic channel. The method includes estimating the inter-node distance as a function of an estimate of a sound speed profile of the underwater acoustic channel, the sound speed profile depending on depth. | 06-20-2013 |
20130155809 | Method and Device for Managing the Acoustic Performances of a Network of Acoustic Nodes Arranged Along Towed Acoustic Linear Antennas - A method and apparatus are provided for managing the acoustic performances of a network of acoustic nodes arranged along towed acoustic linear antennas. The network of acoustic nodes is adapted to determine inter-node distances allowing to locate the acoustic linear antennas. The method includes: obtaining a determined layout of the network of acoustic nodes; obtaining at least one marine environment property relating to an area of performance of a survey with the network of acoustic nodes; and quantifying the acoustic performances of the network of acoustic nodes, using a sound propagation model, the at least one marine environment property and the determined layout. | 06-20-2013 |
20130188451 | BUOY BASED MARINE SEISMIC SURVEY SYSTEM AND METHOD - A seismic survey system for recording seismic data underwater. The system includes first plural buoys configured to descend to a first predetermined depth (H | 07-25-2013 |
20130208565 | METHODS AND SYSTEMS FOR CORRECTION OF STREAMER-DEPTH BIAS IN MARINE SEISMIC SURVEYS - Computational systems and methods, to be carried out by the computational systems for determining streamer-depth bias during exploration-seismology experiments are disclosed. An exploration-seismology vessel tows a number of streamers that form a smoothly varying data acquisition surface located beneath a fluid surface. In one aspect of this disclosure, the method determines a set of image points that represent a profile of the fluid surface above each streamer. The image points are determined based on pressure and velocity wavefields measured at dual sensors of the streamer. The method then determines an elevation parameter of the image points that minimizes DC offset in a spectral domain of the image points. The elevation parameter corresponds to the streamer-depth bias and can be used to correct for the streamer-depth bias in subsequent calculations of a fluid-surface profile. | 08-15-2013 |
20140029381 | METHOD AND APPARATUS FOR POSITIONING A CENTER OF A SEISMIC SOURCE - The present invention provides a method and apparatus for positioning a center of a seismic source. The method includes determining a desired center-of-source of the seismic source and selecting one of a first and a second plurality of guns to form the seismic source based upon the desired center-of-source, a center-of-source of the first plurality being different than a center-of-source of the second plurality. | 01-30-2014 |
20140064026 | WAVE GLIDER WITH STREAMER ORIENTATION SENSOR - A wave glider system includes a float having geodetic navigation equipment for determining a geodetic position and heading thereof. The glider includes an umbilical cable connecting the float to a sub. The sub has wings operable to provide forward movement to the float when lifted and lowered by wave action on the surface of a body of water. At least one geophysical sensor streamer is coupled to the sub. The at least one geophysical sensor streamer has a directional sensor proximate a connection between the sub and one end of the at least one geophysical sensor streamer to measure an orientation of the streamer with respect to a heading of the float. | 03-06-2014 |
20140153360 | HEAD-FLOAT AND METHOD - Method and streamer/source head-float system for connecting to a head portion of a streamer or to a lead-in or providing information about a source. The system includes a head-buoy configured to float in water and connected through a cable to the head portion of the streamer or to the lead-in; a head-float configured to float in water; a connector connecting the head-float to the head-buoy; and positioning equipment attached to the head-float and configured to determine a position of the streamer or the source. | 06-05-2014 |
20150117148 | MARINE STREAMER INERTIAL NAVIGATING DRAG BODY - A sensor streamer drag body system. At least some of the example embodiments include a system having a sensor streamer towable behind a vessel in a body of water, the sensor streamer defining a defining a distal end and a proximal end, the proximal end nearest the vessel. The system further includes a drag body coupled to the distal end of the sensor streamer, wherein the drag body remains submerged while the sensor streamer is deployed. The drag body includes an inertial navigation system. The inertial navigation system is configured to determine a position of the drag body, the drag body lacking an internal GPS. | 04-30-2015 |