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公开(公告)号：US20220066060A1
公开(公告)日：2022-03-03
申请号：US17005784
申请日：2020-08-28
申请人： Magseis FF LLC
发明人： Graham GILLOTT
摘要： A system to detect and control noise in seismic surveys is provided. The system receives, responsive to a seismic wave generated by a source, seismic data detected by a sensor component of a seismic data acquisition unit. The system generates, for windows of the seismic data, Hough tensors for seismic data transforms in multiple dimensions. The system detects, based on a comparison of an eigenvector and eigenvalue of a canonical matrix of the Hough tensors with a historical eigenvector and eigenvalue of a historical canonical matrix of historical Hough tensors of historical seismic data, a first presence of noise in the seismic data. The first presence of noise can correspond to a noisy spectra pattern in a seismic data transform of the seismic data. The system provides, responsive to detection of the first presence of noise in the seismic data, a notification to adjust a characteristic of the seismic survey.
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12.发明申请公开(公告)号：US20220057539A1
公开(公告)日：2022-02-24
申请号：US16996639
申请日：2020-08-18
发明人： Abdullah A. Theyab
摘要： Methods and systems, including computer programs encoded on a computer storage medium can be used to preserve edges while performing Gaussian grid smoothing of noise components in subsurface grids to generate geological maps. A subsurface grid is generated from data indicating properties of subsurface formations. A weighting grid is generated by: i) receiving seismic data representing the subsurface formations; ii) generating seismic attributes associated with discontinuities in the subsurface formations; and iii) assigning a particular weight value to weighting grid points that the seismic attributes associated with discontinuities in the subsurface formations indicate the presence of a discontinuity. The subsurface grid is processed by iteratively computing local averages of grid points in the subsurface grid using a compact Gaussian filter weighted by values in the weighting grid. A geological map of subsurface formations is generated based on the filtered subsurface grid.
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公开(公告)号：US11226427B1
公开(公告)日：2022-01-18
申请号：US16815055
申请日：2020-03-11
发明人： Anthony A Ruffa
摘要： A lift based acoustic source is towable in an undersea environment by a towing vessel. A controller provides a combined lift control signal and an acoustic source signal. A control cable is joined between the towing vessel and a towed depressor having an active lift control system. The combined signal is used to control the towed depressor active lift control system. The towed depressor lift fluctuates in response to the source signal to generate the undersea acoustic signal. A hydrophone or hydrophone array can be provided for measuring the generated acoustic signal for feedback and monitoring.
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公开(公告)号：US11204434B2
公开(公告)日：2021-12-21
申请号：US15767485
申请日：2015-12-16
发明人： Mikko Jaaskelainen
摘要： A system and method for seismic monitoring of large area subsurface reservoirs, for instance, the system comprising: multiple electro acoustic technology assemblies comprising seismic sensing elements, electronic circuits for converting the seismic sensing signals to frequencies, amplification circuitry to amplify the frequencies, an acoustic source that converts the amplified frequencies to an acoustic frequency signal; a fiber optic acoustic sensing system comprising a fiber optic cable deployed in a subsurface reservoir, where the multiple electro acoustic technology assemblies are proximate to and/or acoustic coupled with the fiber optic cable of the fiber optic acoustic sensing system, and a surface based distributed acoustic sensing interrogator connected to the fiber optic cable.
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公开(公告)号：US11169291B2
公开(公告)日：2021-11-09
申请号：US16282077
申请日：2019-02-21
发明人： Yaniv Hollander , Orhan Yilmaz
摘要： A system and method for interpolating seismic data collected by a set of geophones arranged in an irregularly spaced grid by: transforming the collected seismic data by a Radon transform; pre-computing a set of basis function correlation factors by geometrically scaling a spatial geometry of each temporal frequency slice of the transformed seismic data independently by its temporal frequency; computing, solely in the transformed domain, an anti-leakage Radon transform of the seismic data by computing each Radon coefficient independently for each temporal frequency slice using the pre-computed basis function correlation factors, until a relative error between the collected seismic data and an approximation of the collected seismic data based on the Radon coefficients is less than a predetermined convergence threshold; and simulating seismic data collected in a regularly spaced grid by interpolating the anti-leakage Radon transform of the collected seismic data in the irregularly spaced grid.
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公开(公告)号：US20210333427A1
公开(公告)日：2021-10-28
申请号：US17369440
申请日：2021-07-07
申请人： Magseis FF LLC
发明人： Roger L. Fyffe , Etienne Marc
摘要： The present disclosure is directed to systems and methods of facilitating a seismic survey and locating seismic data acquisition units in a marine environment. The system can include a first seismic data acquisition unit. The first seismic data can include a cleat ring to couple the first seismic data acquisition with a second seismic data acquisition unit. The system can include a rope having a first end coupled to a first portion of the first seismic data acquisition unit and a second end coupled to a second portion of the first seismic data acquisition unit. The system can include a cavity formed by the cleat ring. The system can include a telltale component coupled to a portion of the rope. The rope and the telltale component can be stored in the cavity of the first seismic data acquisition unit.
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公开(公告)号：US20210278556A1
公开(公告)日：2021-09-09
申请号：US16811323
申请日：2020-03-06
发明人： Bruce Gordon Elmegreen , Oki Gunawan , Wang Zhou
IPC分类号： G01V1/18
摘要： Aspects of the invention include arranging two cylindrical magnets with transverse magnetization to be parallel to each other along their longitudinal axis. The two cylindrical magnets have a space between them and are prevented from moving relative to one another. An exemplary method includes disposing a diamagnetic object in the space between the two cylindrical magnets, wherein the object levitates above the space. A motion detector is arranged to identify relative movement between the two cylindrical magnets and the object, and an infrasound wave is identified based on the relative movement.
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公开(公告)号：US11079506B2
公开(公告)日：2021-08-03
申请号：US15830103
申请日：2017-12-04
申请人： PGS Geophysical AS
发明人： Øyvind Hillesund
摘要： A seismic streamer includes an outer sheath that forms an interior region of the seismic streamer of which a portion is filled with a gel or liquid. The streamer also includes at least one stress member placed off-center in the interior region, and multiple sensors mounted proximate to a center of the interior region, where the sensors include a pressure sensor and a motion sensor. The streamer further includes multiple tilt sensors mounted along the interior region. A method of manufacturing a seismic streamer includes placing at least one stress member off-center along a first direction, mounting multiple spacers along the stress member, and affixing sensors to respective spacers, where the sensors include a pressure sensor and a motion sensor. The method further includes mounting tilt sensors along the first direction and affixing an outer sheath to the streamer that forms an interior region of the seismic streamer.
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公开(公告)号：US11047230B2
公开(公告)日：2021-06-29
申请号：US16586091
申请日：2019-09-27
发明人： Andreas Ellmauthaler , John L. Maida, Jr. , Ira Jeffrey Bush , Michel Joseph LeBlanc , Glenn Andrew Wilson
摘要： A distributed acoustic system (DAS) with an interrogator, an umbilical line attached at one end to the interrogator, and a downhole fiber attached to the umbilical line at the end opposite the interrogator. A method for optimizing a sampling frequency may begin with identifying a length of a fiber optic cable connected to an interrogator, identifying one or more regions on the fiber optic cable in which a backscatter is received, and optimizing a sampling frequency of a distributed acoustic system (DAS) by identifying a minimum time interval that is between an emission of a light pulse such that at no point in time the backscatter arrives back at the interrogator that corresponds to more than one spatial location along a sensing portion of the fiber optic cable.
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20.发明授权公开(公告)号：US10992099B1
公开(公告)日：2021-04-27
申请号：US16634522
申请日：2018-07-24
申请人： THALES
发明人： François - Xavier Launay , Raphael Lardat , Gérard Roux , Christophe Oubaiche , Romain Barreau , Thomas Pastureaud
摘要： A holder and at least one terminal element that are configured and arranged with respect to one another so as to form a cavity of length ΔL bounded axially by two walls the relative position of which with respect to each other varies in the opposite direction to the variation in ambient temperature, an increase in temperature causing the walls to move closer together and vice versa. A linear structure incorporating the device sees its length decrease when temperature increases and vice versa. Electro-optical transducers comprising a piezoelectric actuator of linear structure that acts on the length of a segment of optical fiber that forms the laser source of the transducer, and having such a device incorporated into the actuator in order to compensate, by modifying the length of the segment of fiber, for the variations in wavelength induced in the laser by the variations in temperature.
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