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91.发明授权Method and apparatus for seismic gain control through seismic signal coherence 失效通过地震信号协调进行地震增益控制的方法与装置
公开(公告)号：US3714621A
公开(公告)日：1973-01-30
申请号：US3714621D
申请日：1970-12-30
申请人： CONTINENTAL OIL CO
发明人： WATERS K
CPC分类号： G06G7/1928 , G01V1/245
摘要： The method consists of deriving a coherence measure from selected related traces of a seismic cross-section, and thereafter weighting individual or selected ones of the seismic traces in accordance with such time-analogue coherence quotient. Apparatus for carrying out the method may consist of structure for imposing predetermined delay between each pair of a group of selected seismic traces with subsequent summation, multiplication and integration over a time period to provide a first integrated output; and each trace pair is then subjected to one or more other predetermined, different delays with respective outputs applied to the multiplier and integrator circuitry thereby to generate additional integrated outputs. All integrated outputs for each trace pair are then applied through sample and hold circuitry to select a time-varying maximum voltage signal for output as a coherence quotient signal. Thereafter, the coherence quotient signals for each trace pair are combined to form a signal of time-varying character which is employed to control signal gain through duration of selected seismic trace signals thereby to selectively allow passage or to suppress in varying degrees the final output signal indications.
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92.发明授权
公开(公告)号：US3710259A
公开(公告)日：1973-01-09
申请号：US3710259D
申请日：1970-11-27
摘要： A buoy for use in seismic surveying at marine locations comprises an elongated housing with a flotation member positioned near the normal waterline of the device. The lower portion of the housing or battery section is of greater diameter than the upper section, and a tethering ring for connection to an anchor is located at the upper end of the battery section so that the cross sectional area below the tethering ring is substantially equal to the cross sectional area of the housing above the tethering ring. A seismic detection apparatus, conveniently a hydrophone, is used to detect seismic signals and preferably rests on the water bottom. A seismic amplifier within the housing amplifies the geophone signals. The gain of the amplifier is controlled by a circuit that varies the gain in accordance with a weighted function of the amplitude of the output signals of the amplifier over an interval of at least two minutes. The output signal of the amplifier also is used to amplitude modulate a signal generator of constant frequency or constant repetition rate, and the amplitude modulated signal is used to frequency modulate a radio transmitter.
摘要翻译： 用于海洋位置的地震测量中的浮标包括细长壳体，浮选部件位于装置的正常水线附近。 壳体或电池部分的下部具有比上部更大的直径，并且用于连接锚固件的系环环位于电池部分的上端，使得系链环下方的横截面面积基本相等 到达系绳环上方的壳体的横截面积。 地震检测装置，便利地是水听器，用于检测地震信号，优选地位于水底。 外壳内的地震放大器放大地震检波器信号。 放大器的增益由电路控制，该电路根据放大器的输出信号的振幅的加权函数在至少两分钟的间隔上改变增益。 放大器的输出信号也用于对恒定频率或恒定重复频率的信号发生器进行幅度调制，幅度调制信号用于对无线电发射机进行频率调制。
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公开(公告)号：US3699325A
公开(公告)日：1972-10-17
申请号：US3699325D
申请日：1969-10-09
申请人： SHELL OIL CO
CPC分类号： H03G3/3026 , G01V1/245 , H03M1/1205 , H03M1/361
摘要： One-hundred low-frequency analog signal channels having a very large dynamic range, may be amplified to at least half of full scale a 14 bit analog to digital converter without distortion by an amplifier system that includes an instantaneous gain-ranger, a preamplifier for each channel, a filter system for each channel, a premultiplexer gain-ranging amplifier for each channel, and a multiplexer. The instantaneous gain-ranger consists of a series of binary amplifier stages, threshold detecting circuitry and logic circuitry. The output is taken from the first unsaturated amplifier. The preamplified and premultiplexer gain-ranging amplifier are connected into the system ahead of the multiplexer and provide a sufficient signal-to-noise ratio to mask the noise introduced into the system by the multiplexer. The output of the system is typically digitized.
摘要翻译： 具有非常大的动态范围的100个低频模拟信号通道可以通过放大器系统被放大到满量程的14位模数转换器的至少一半，而无失真，该放大器系统包括瞬时增益调节器，用于 每个通道，每个通道的滤波器系统，每个通道的预多路复用器增益测距放大器，以及多路复用器。 瞬时增益调节器由一系列二进制放大器级，阈值检测电路和逻辑电路组成。 输出取自第一不饱和放大器。 预放大和预多路复用器增益放大器连接到多路复用器之前的系统中，并提供足够的信噪比以掩蔽多路复用器引入系统的噪声。 系统的输出通常被数字化。
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公开(公告)号：US3683398A
公开(公告)日：1972-08-08
申请号：US3683398D
申请日：1968-09-27
申请人： MANDREL INDUSTRIES
发明人： WORLEY JOHN K
CPC分类号： G01V1/34
摘要： A time varying time scale display and the process for generating same, wherein conventional seismic data recorded at a fixed sampling rate are resampled at a preselected time varying rate. A conventional display camera is modified to provide an external timing circuit, which during the process is actuated by a timing signal based on the preselected time varying rate. Thus the high frequency portion of the display is expanded and the low frequency portion is contracted, to provide an improved seismic display having the selected time varying time scale.
摘要翻译： 时变时间尺度显示及其生成过程，其中以固定采样率记录的常规地震数据以预先选择的时变速率重采样。 传统的显示照相机被修改以提供外部定时电路，其在该过程期间由基于预选的时变速率的定时信号启动。 因此，显示器的高频部分扩大并且低频部分收缩，以提供具有所选择的时变时间尺度的改进的地震显示。
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公开(公告)号：US3651450A
公开(公告)日：1972-03-21
申请号：US3651450D
申请日：1969-10-20
申请人： SHELL OIL CO
CPC分类号： G01V1/247
摘要： A recording system adapted to digitally record the data from a large number of geophones wherein the geophones are divided into subgroups with the data from each subgroup being multiplexed with a local clock signal and transmitted to a central recording station where it is partially demultiplexed, stretched in time, and recorded.
摘要翻译： 一种记录系统，适于数字地记录来自大量地震检波器的数据，其中将地震检波器划分成子组，其中来自每个子组的数据与本地时钟信号复用，并传输到中央记录站，其中被部分解复用， 时间和记录。
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96.发明授权Method for processing three-dimensional seismic data to select and plot said data on a two-dimensional display surface 失效用于处理三维地震数据以在二维显示表面上选择和绘制数据的方法
公开(公告)号：US3638178A
公开(公告)日：1972-01-25
申请号：US3638178D
申请日：1969-12-01
申请人： CHEVRON RES
发明人： STEPHENSON LEE P
CPC分类号： G01V1/34
摘要： A method and apparatus for processing seismic data to display representations of reflectors within a three-dimensional volume. The data is collected with a surface geophone array in response to a single seismic source. Separate portions of the data are processed to identify reflectors with respect to certain of the geophones. These separately processed data are then compared to isolate common identifications of the same reflector. Coordinate information applicable to the isolated identification are then resolved to position the reflector within the three-dimensional volume. A projection of that position is then produced on a display surface to provide a two-dimensional representation of the reflectors within the three-dimensional volume.
摘要翻译： 一种用于处理地震数据以在三维体积内显示反射体的表示的方法和装置。 响应于单个地震源，数据与表面地震检波器阵列一起收集。 处理数据的分离部分以识别关于某些地震检波器的反射器。 然后将这些单独处理的数据进行比较，以隔离相同反射器的公共标识。 然后解析适用于孤立识别的坐标信息，以将反射器定位在三维体积内。 然后在显示表面上产生该位置的投影，以提供三维体积内的反射器的二维表示。
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97.发明授权
公开(公告)号：US3602879A
公开(公告)日：1971-08-31
申请号：US3602879D
申请日：1969-05-21
摘要： The disclosure relates to a system for providing a three-color graphic representation of the subaqueous terrain. As in previous systems, a sound generator is used to transmit an acoustic signal to the ocean floor, which signal is then transmitted by reflection and appropriately received. Received signals are separated into pulses of a plurality of selected frequencies, which pulses are used to selectively activate a plurality of glow lamps in accordance with the detected frequencies. A dichroic mirror system is then used to convert the light from the glow lamps into primary color radiation which is then combined and used to make a photographic record of the signal pattern in color.
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公开(公告)号：US3573804A
公开(公告)日：1971-04-06
申请号：US60421166
申请日：1966-12-23
申请人： GEOPHYSIQUE CIE GLE
发明人： PICOU CLAUDE H
摘要： An analog-digital converter has an input for an analog waveform and a reference voltage generator connected to a device for modifying the output of the generator in selected amplitude steps. A variable gain amplifier is arranged to receive both the analogue input and the modified reference voltage and is connected to a device for producing at repeated instants a digital signal corresponding to the difference between the instantaneous analog input and the modified reference voltage, and a further signal to the modifying device, should the difference be outside a predetermined range. The modifying device is responsive to the further signal to alter the reference voltage fed to the amplifier such that the difference is maintained within the predetermined range.
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公开(公告)号：US3555503A
公开(公告)日：1971-01-12
申请号：US3555503D
申请日：1969-08-05
发明人： MORRIS HAROLD B
CPC分类号： G01V1/181 , B06B1/0607 , G01V1/245
摘要： SEISMIC WAVES ARE DETECTED AND RECORDED BY GENERATING ACCELERATION SIGNALS THROUGH PRESTRESSED PIEZOELECTRIC CRYSTALS OF WIDE BAND FREQUENCY CAPABILITY AND PASSING THE WIDE BAND SIGNAL TO A MULTI-STAGE AMPLIFIER HAVING WIDE BAND INPUT AND PROGRESSIVELY NARROWED FREQUENCY BAND THROUGH SUCCESSIVE STAGES OF THE AMPLIFIER WHILE RETAINING SIGNALS OF FREQUENCY IN THE RANGE OF ABOUT 100 CYCLES PER SECOND AND ABOVE.
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