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公开(公告)号：US20020060952A1
公开(公告)日：2002-05-23
申请号：US09795478
申请日：2001-03-01
申请人： GEOSERVICES
发明人： Fabio Cecconi , Louis Soulier
IPC分类号： G01V001/00
CPC分类号： G01V1/52 , G01V2200/12
摘要： Seismic waves are recorded twice by a reference sensor (8) above ground and by a sensor (18) located in the drill hole (1). Measurements are synchronized by a clock system, the clock associated with sensor (18) being designed specifically for providing such synchronization in spite of operating conditions prevailing at the bottom of a drill hole (vibrations, shocks, temperature).
摘要翻译： 地震波被地面上的参考传感器（8）和位于钻孔（1）中的传感器（18）记录两次。 测量由时钟系统同步，与传感器（18）相关联的时钟被设计为专门用于提供这样的同步，尽管在钻孔的底部（振动，冲击，温度）存在操作条件。
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公开(公告)号：US11905826B2
公开(公告)日：2024-02-20
申请号：US16346416
申请日：2018-05-31
发明人： Imran Sharif Vehra , Zinovy B. Krugliak , Randal T. Beste , Matthew Chase Griffing , Christopher A. Golla , Wenhao Chen , Rameez Balagamwala
CPC分类号： E21B47/12 , G01V3/34 , G01V11/002 , G01V13/00 , G01V2200/12
摘要： A method for calibrating a downhole tool may comprise disposing a downhole tool in a borehole, transmitting a signal from a master module disposed on the first device to a module disposed on the second device, transmitting a return signal from the module to the master module, receiving the return signal with the master module, measuring a tone enabled delay for the signal to travel from the master module to the module, and determining a time delay of a return signal to travel from the module to the master module. A well measurement system may comprise a downhole tool. The downhole tool may further comprise a first device and a master module disposed on the first device, wherein the master module may comprise a master transmitter and a master receiver. In examples, the downhole tool may further comprise a second device and a module disposed on the second device.
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83.发明授权公开(公告)号：US11719839B2
公开(公告)日：2023-08-08
申请号：US16977193
申请日：2019-03-01
申请人： inApril AS
发明人： Oistein Aanensen
CPC分类号： G01V1/247 , G01V1/26 , G01V1/226 , G01V2200/12
摘要： A method of correcting clock drift in at least one slave clock in a seismic node. The method comprises obtaining a number of clock drift measurements of the at least one slave clock in the at least one seismic node. A clock drift correction function as a function of time is calculated by curve fitting the number of clock drift measurements to a 2nd order polynomial. A time of reference of the recorded seismic sensor data is corrected by the 2nd order polynomial clock drift correction function.
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公开(公告)号：US20190235127A1
公开(公告)日：2019-08-01
申请号：US16380619
申请日：2019-04-10
申请人： Magseis FF LLC
摘要： A wireless seismic data acquisition unit with a wireless receiver providing access to a common remote time reference shared by wireless seismic data acquisition units in a seismic system. The receiver can replicate local version of remote time epoch to which a seismic sensor analog-to-digital converter is synchronized. The receiver can replicate local version of remote common time reference to time stamp local node events. The receiver can be placed in a low power, non-operational state over periods of time during which the unit continues to record seismic data, thus conserving unit battery power. The system corrects the local time clock based on intermittent access to the common remote time reference. The system corrects the local time clock via a voltage controlled oscillator to account for environmentally induced timing errors.
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公开(公告)号：US20180203142A1
公开(公告)日：2018-07-19
申请号：US15558560
申请日：2016-03-23
发明人： John Gerard Bouska
CPC分类号： G01V1/26 , G01V1/307 , G01V2200/12
摘要： A method includes receiving data indicative of outputs of first and second seismic sensors. The outputs include components corresponding to the detection by the first and second seismic sensors of first and second seismic signals. In addition, the method includes identifying, relative to a first clock in the first seismic sensor, a first time associated with a time of arrival of the first seismic signal at the first seismic sensor, and a second time associated with a time of arrival of the second seismic signal at the first seismic sensor. Further, the method includes identifying, relative to a second clock in the second seismic sensor, a third time associated with a time of arrival of the first seismic signal at the second seismic sensor, and a fourth time associated with a time of arrival of the second seismic signal at the second seismic sensor. Still further, the method includes determining an offset of the first clock relative to the second clock using the first, second, third and fourth times.
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公开(公告)号：US20180095187A1
公开(公告)日：2018-04-05
申请号：US15712546
申请日：2017-09-22
CPC分类号： G01V1/40 , G01V1/005 , G01V1/26 , G01V1/301 , G01V1/42 , G01V2200/12 , G01V2200/14 , G01V2210/1214 , G01V2210/1295 , G01V2210/1429 , G01V2210/16 , G06F17/5009
摘要： A seismic system that includes a seismic source configured to generate a first seismic signal and a second seismic signal in a formation adjacent the seismic source. A first downhole sensing device disposed in a first borehole configured to detect the first seismic signal and the second seismic signal in the formation; and a first surface acquisition system is in communication with the first downhole sensing device. The first surface acquisition system is configured to: determine a first reference transit time based at least in part on detection of the first seismic signal by the first downhole sensing device; a first subsequent transit time based at least in part on detection of the second seismic signal by the first downhole sensing device; andwhether a synchronization variation is expected to be present based at least in part on the first reference transit time and the first subsequent transit time.
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公开(公告)号：US20170176638A1
公开(公告)日：2017-06-22
申请号：US15402995
申请日：2017-01-10
IPC分类号： G01V13/00
摘要： A wireless seismic data acquisition unit with a wireless receiver providing access to a common remote time reference shared by wireless seismic data acquisition units in a seismic system. The receiver can replicate local version of remote time epoch to which a seismic sensor analog-to-digital converter is synchronized. The receiver can replicate local version of remote common time reference to time stamp local node events. The receiver can be placed in a low power, non-operational state over periods of time during which the unit continues to record seismic data, thus conserving unit battery power. The system corrects the local time clock based on intermittent access to the common remote time reference. The system corrects the local time clock via a voltage controlled oscillator to account for environmentally induced timing errors. The system provides a more stable method of correcting drift in the local time clock.
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公开(公告)号：US20170082764A1
公开(公告)日：2017-03-23
申请号：US15306842
申请日：2015-05-05
申请人： CGG Services SA
发明人： Joseph LASANTE , Benoit TEYSSANDIER
CPC分类号： G01V1/3861 , G01V1/006 , G01V1/22 , G01V2200/12 , G01V2200/14 , G01V2210/1293
摘要： A source controller distributed system for a multi-element marine source includes a master controller communicating via a cable with source controllers associated with source elements. The master controller generates commands for the source controllers. Each source controller is attached to sensors and mechanisms of one of the source elements, and controls the source element according to the received commands. The source controller also sends data to the master controllers, with the data being gathered by sensors of the source element and/or being related to the status of the source elements, alerts, and/or functional quality control.
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公开(公告)号：US20160334542A1
公开(公告)日：2016-11-17
申请号：US15151901
申请日：2016-05-11
发明人： Stephen K. CHIU , Phil D. ANNO
CPC分类号： G04G7/00 , G01V1/40 , G01V2200/12
摘要： The invention relates to a method, system and apparatus for synchronizing the time of time series data acquired from a wellbore sensor relative to a reference time series. This comprises acquiring a first time series from a sensor in a wellbore, acquiring a reference time series and determining a linear moveout time correction to apply to the first time series. The linear moveout time correction is equal to the depth of the wellbore sensor divided by the signal propagation velocity. The linear moveout correction is applied to the first time series. The first time series is cross-correlated with the reference time series to determine a cross-correlation time correction to apply to the first time series and the cross-correlation time correction is applied to the first time series to obtain a cross-correlation corrected time series. Dynamic time warping and dynamic cross-correlation may be used to adjust for clock drift.
摘要翻译： 本发明涉及一种用于使从井筒传感器获取的时间序列数据相对于参考时间序列的时间同步的方法，系统和装置。 这包括从井眼中的传感器获取第一时间序列，获取参考时间序列并确定适用于第一时间序列的线性移动时间校正。 线性移动时间校正等于井筒传感器的深度除以信号传播速度。 线性移动校正被应用于第一时间序列。 第一时间序列与参考时间序列互相关，以确定应用于第一时间序列的互相关时间校正，并将互相关时间校正应用于第一时间序列，以获得互相关校正时间 系列。 可以使用动态时间扭曲和动态互相关来调整时钟漂移。
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公开(公告)号：US09250347B2
公开(公告)日：2016-02-02
申请号：US13488992
申请日：2012-06-05
申请人： Radu Coman
发明人： Radu Coman
CPC分类号： G01V1/46 , E21B47/00 , G01V2200/12 , G01V2210/161
摘要： The present disclosure is direct to method of performing measurements while drilling in an earth formation. The method may include estimating a location of a seismic reflector using signals from one or more of seismic sensors located at a plurality of locations in a borehole and the drilling depth of the one or more seismic sensors in a borehole. The signals may include information about times when the seismic sensors detect a direct wave and a reflected wave. The method may include storing the information in a memory using a processor.
摘要翻译： 本公开直接涉及在地层中钻孔时进行测量的方法。 该方法可以包括使用位于钻孔中的多个位置处的一个或多个地震传感器的信号以及钻孔中的一个或多个地震传感器的钻孔深度来估计地震反射器的位置。 信号可以包括关于地震传感器检测直接波和反射波的时间的信息。 该方法可以包括使用处理器将信息存储在存储器中。
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