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公开(公告)号：US20240248221A1
公开(公告)日：2024-07-25
申请号：US18156582
申请日：2023-01-19
申请人： P-Waver Inc.
发明人： Pei-Yang Lin , Hung-Wei Chiang , Hsiu-Hsien Wang
摘要： An on-site earthquake early warning method is disclosed. The method includes the following steps: receiving a first signal generated in response to a first vibration event and a second signal generated in response to a second vibration event; determining whether an earthquake event exists according to the first and the second signals; predicting a real-time seismic shear wave prediction characteristic value according to the first signal; and sending the real-time seismic shear wave prediction characteristic value when it is determined that the earthquake event exists.
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公开(公告)号：US12019195B2
公开(公告)日：2024-06-25
申请号：US18351906
申请日：2023-07-13
发明人： Seungjoon Cha , Youngki Choi , Hee Jeong Jang , Kyoung Jin Lee , Hyunjong Cho
摘要： Disclosed are a method and apparatus for estimating S-wave velocities by learning well logs, whereby the method includes a model formation step of forming an S-wave estimation model to output S-wave velocities corresponding to measured depth when the well logs are input based on train data sets including train data having values of multiple factors included in the well logs, the values being arranged corresponding to measured depth, and label data having S-wave velocities corresponding to measured depth as answers, and an S-wave velocity estimation step of inputting unseen data having values of multiple factors included in well logs acquired from a well at which S-wave velocities are to be estimated, the values being arranged corresponding to measured depth, to the S-wave estimation model to estimate S-wave velocities corresponding to measured depth.
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公开(公告)号：US11905816B2
公开(公告)日：2024-02-20
申请号：US16062051
申请日：2016-03-03
发明人： Zhijuan Zhang , Nazareth Bedrossian
IPC分类号： E21B47/00 , G01V1/50 , G01V1/28 , E21B47/005 , E21B47/007
CPC分类号： E21B47/00 , E21B47/005 , E21B47/007 , G01V1/282 , G01V1/284 , G01V1/50 , G01V2210/1299 , G01V2210/1429 , G01V2210/43 , G01V2210/614
摘要： The thickness of borehole casing can be determined by ultrasound logging in conjunction with simulations of ultrasonic plane-wave echo waveforms across a range of frequencies for a plurality of casing thicknesses and correlation of synthetic frequency spectra derived from the simulated plane-wave echo waveforms for the various casing thicknesses against the frequency spectrum of a measured pulse-echo waveform. In accordance with various embodiments, a portion of the measured pulse-echo waveform that corresponds to the first reflection off the interface between the borehole casing and the borehole fluid is used as a driving pulse to weight the simulated plane-wave echo waveforms in the synthetic frequency spectrum.
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公开(公告)号：US20230296799A1
公开(公告)日：2023-09-21
申请号：US18296494
申请日：2023-04-06
发明人： Henri-Pierre Valero , Takeshi Endo , Hrvoje Markovic , Yoshisuke Fukagawa , Yuta Okabe , Shinichi Sunaga , Mitsuko Kitazawa , Ryoko Hayashi , Ivayla Gueorguieva
CPC分类号： G01V1/282 , G01V1/303 , G01V1/34 , G01V1/46 , G01V1/50 , G01V2210/6222 , G01V2210/74 , G01V2210/614 , G01V1/284 , G01V2210/41
摘要： A method, article and system are provided for processing and interpreting acoustic data. The method and system includes providing a number of acoustic processing elements, each element being associated with an acoustic mode of a number of acoustic modes of a sonic measurement tool adapted to acquire data representing acoustic measurements in a borehole. In addition the method and system includes providing a user interface to organize a processing chain of the number of acoustic processing elements such that the acoustic processing elements process the acquired data according to a predefined workflow.
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公开(公告)号：US11719840B2
公开(公告)日：2023-08-08
申请号：US16499955
申请日：2018-12-28
摘要： An apparatus includes a mechanical wave source; a set of mechanical wave sensors in a borehole to provide subsurface wave measurements based on formation waves from the mechanical wave source, and a processor. The apparatus also includes a machine-readable medium having program code to acquire the subsurface wave measurements, select a first set of tool wave measurements based on the subsurface wave measurements, and generate a set of filtered subsurface wave measurements by filtering the subsurface wave measurements based on the first set of tool wave measurements. The program code also includes instructions to generate a time-domain semblance map based on the set of filtered subsurface wave measurements, wherein the time-domain semblance map includes an initial set of compression wave peaks, determine a selected qualified compression wave peak based on a semblance value in the time-domain semblance map, and determine a compression wave slowness based on the selected qualified compression wave peak.
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6.发明申请公开(公告)号：US20180267190A1
公开(公告)日：2018-09-20
申请号：US15761326
申请日：2015-11-06
CPC分类号： G01V1/50 , G01V1/282 , G01V1/284 , G01V1/303 , G01V1/305 , G01V1/34 , G01V2210/121 , G01V2210/1299 , G01V2210/21 , G01V2210/43 , G01V2210/47 , G01V2210/614 , G01V2210/6222
摘要： A method includes obtaining at least one digital waveform corresponding to acoustic signals collected by a logging tool deployed in a downhole environment. The method also includes performing windowed frequency spectra analysis (WFSA) on the at least one digital waveform to obtain frequency semblance information at different time-slices. The method also includes deriving a slowness log as a function of position using the frequency semblance information.
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7.发明申请公开(公告)号：US20180246238A1
公开(公告)日：2018-08-30
申请号：US15965503
申请日：2018-04-27
发明人： Shitai Dong , Likang Chen , Xiaodong Zheng , Yan Zhang , Zhan'an Xie
CPC分类号： G01V1/284 , G01V1/008 , G01V1/181 , G01V1/184 , G01V1/282 , G01V1/305 , G01V2200/14 , G01V2210/512 , G01V2210/67
摘要： The invention discloses an omnidirectional vector seismic data processing method and apparatus, a computer readable storage medium and a device, applied to an omnidirectional vector geophone. Wherein the method comprises: collecting omnidirectional vector seismic data of the omnidirectional vector geophone, and performing a pre-processing operation on the omnidirectional vector seismic data; performing pressure and shear waves separation operation on the omnidirectional vector seismic data after the data is subject to the pre-processing operation, to obtain pressure wave data and shear wave data; sequentially performing space vector calculation, a wave field recovery operation and an imaging operation on the pressure wave data and the shear wave data, and then performing modeling to obtain a pressure wave velocity model and a shear wave velocity model. The invention solves the problem of the existing seismic exploration technology that cannot measure and process divergence data and curl data of seismic wave field, so as to improve construction, lithology, fluid exploration accuracy and reliability and promote seismic exploration to be developed from structural exploration to lithology exploration and fluid exploration.
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8.发明申请公开(公告)号：US20180196153A1
公开(公告)日：2018-07-12
申请号：US15038762
申请日：2016-01-12
发明人： Ming Gu , John Andrew Quirein , Mehdi Eftekharifar
CPC分类号： G01V1/306 , G01V1/282 , G01V1/284 , G01V1/50 , G01V2210/626
摘要： A combination model combining a velocity regression method (V-reg) with the modified ANNIE model may be used to predict the stiffness coefficients, Ci,j, in a transversely isotropic medium without using the Stoneley wave velocity. The stiffness coefficients may be used to characterize the surrounding formation, which may be used in hydraulic fracture modeling, stage/perforation design, and well completion operations (e.g., perforating and fracturing operations).
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公开(公告)号：US09817141B2
公开(公告)日：2017-11-14
申请号：US14006105
申请日：2012-03-21
申请人： Robert H. Brune
发明人： Robert H. Brune
CPC分类号： G01V1/284 , E21B43/26 , G01V1/308 , G01V2210/1234 , G01V2210/144
摘要： The present invention provides a technique to separate compressional seismic waves from shear seismic waves and to determine their direction of propagation to enhance the seismic monitoring oil and gas reservoirs and the seismic monitoring of hydrofracturing in oil and gas wells. The invention utilizes various combinations of multi-component linear seismic sensors, multi-component rotational seismic sensors, and pressure sensors. Sensors are jointly deployed in arrays of shallow monitoring wells to avoid the complicating effects of the free surface of the earth. The emplacement of sensors in the shallow monitoring wells may be permanent. The method has a wide range of application in oil and gas exploration and production. This abstract is not intended to be used to interpret or limit the claims of this invention.
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公开(公告)号：US20170322331A1
公开(公告)日：2017-11-09
申请号：US15329458
申请日：2015-08-18
申请人： CGG SERVICES SAS
发明人： Benjamin ROURE
摘要： PP and PS seismic data are jointly inverted in a stratigraphic grid, using different time axes for PP and PS reflections. A ratio of PP and of PS waves'travel times inside a same layer cell maintained to be a function of a ratio of a P-wave propagation velocity and of an S-wave propagation velocity therein. Since PP and PS seismic amplitudes and travel times are due to elastic properties of the same structure, they can be inverted at the same time to provide better estimates of these elastic properties.
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