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公开(公告)号：US12130399B2
公开(公告)日：2024-10-29
申请号：US18045656
申请日：2022-10-11
摘要： Methods and systems for measuring cluster efficiency for stages of wellbores are provided herein. One method includes selecting a frequency band for generating broadband tube waves within the fluid column of the wellbore and generating the broadband tube waves within the fluid column of the wellbore using a pressure pulse generator that is hydraulically coupled to the wellbore. The method also includes recording data corresponding to the broadband tube waves and reflected broadband tube waves using pressure receivers that are hydraulically coupled to the wellbore. The pressure receivers are arranged into arrays with two or more pressure receivers in each array. The data recorded by the pressure receivers relate to characteristics of reflectors (including perforation cluster/fracture interfaces) within the wellbore. The method further includes processing the recorded data using interferometry and performing full waveform inversion(s) on the processed data to determine frequency-dependent, complex-valued reflection coefficients at each perforation cluster/fracture interface.
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公开(公告)号：US20240337768A1
公开(公告)日：2024-10-10
申请号：US18294868
申请日：2022-08-04
发明人： Takashi Mizuno , Joel Le Calvez
CPC分类号： G01V1/50 , E21B47/04 , E21B47/18 , G01V2210/6222
摘要： A method can include receiving a sonic data log for a length interval of a borehole in a geologic environment as acquired via a tool disposed in the borehole; representing the sonic data log using an ordered series representation with respect to length for at least a portion of the length interval; and inverting the sonic data log using the ordered series representation to generate a model of at least a portion of the geologic environment, where the model includes sonic velocity related property values.
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公开(公告)号：US20240329272A1
公开(公告)日：2024-10-03
申请号：US18192523
申请日：2023-03-29
发明人： Hussain AlBahrani
摘要： A method for obtaining mechanical earth model (MEM) parameters, the method involving obtaining an ultrasonic image log for a borehole, based on the ultrasonic image log, obtaining an estimate of a borehole geometry for an entire circumference of the borehole in an interval of the ultrasonic image log, and estimating the MEM parameters using the estimate of the borehole geometry.
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公开(公告)号：US20240310547A1
公开(公告)日：2024-09-19
申请号：US18591065
申请日：2024-02-29
申请人： CHEVRON U.S.A. INC.
发明人： Un Young Lim , Ke Wang , Reynaldo Cardona
CPC分类号： G01V1/50 , E21B49/00 , G01V2210/6222 , G01V2210/66
摘要： A method is described for seismic inversion and wavelet estimation including uncertainty quantification. The method uses bootstrapping and deep neural networks to generate an ensemble of realizations that are analyzed to quantify uncertainty. The method is executed by a computer system.
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公开(公告)号：US12055672B2
公开(公告)日：2024-08-06
申请号：US17288622
申请日：2019-10-24
发明人： Ting Lei , Sandip Bose , Smaine Zeroug
CPC分类号： G01V1/50 , E21B47/14 , G01V1/46 , G01V2210/1429 , G01V2210/6169 , G01V2210/624 , G01V2210/74
摘要： A method, computer program product, and computing system for generating high resolution slowness logs. The method computer program product, and computing system includes receiving a plurality of sonic logs from at least one sensor array and generating at least one high-resolution slowness log from the plurality of sonic logs based upon, at least in part, monopole and dipole data from the plurality of sonic logs.
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公开(公告)号：US12050294B1
公开(公告)日：2024-07-30
申请号：US18166338
申请日：2023-02-08
发明人： Yequan Chen , Fan Xia
CPC分类号： G01V1/282 , G01V1/104 , G01V1/50 , G01V2210/1212 , G01V2210/6242
摘要： A method and system for generating and displaying a low frequency model for a seismic survey region are provided. The method and system may include defining a seismic survey geometry of the seismic survey region; processing seismic data to generate a stacked seismic data and well log data to obtain elastic attributes; importing stacked seismic data and processed well log data into the defined seismic survey geometry; generating envelope data using the stacked seismic data; generating a low frequency trace for each well; calculating a least-squares optimized coefficient model at each well location based upon the generated envelope data and the low frequency trace for each well; interpolating the coefficient model to the seismic survey geometry using a covariance technique and the imported stacked seismic data; and generating a three-dimensional low frequency model by inversion using the envelope data and the interpolated coefficient model for display.
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公开(公告)号：US12037887B2
公开(公告)日：2024-07-16
申请号：US17900335
申请日：2022-08-31
发明人： Jiajun Zhao , Ruijia Wang , Jonathan Brenda Sue
IPC分类号： G01V1/46 , E21B47/005 , G01V1/50
CPC分类号： E21B47/005 , G01V1/50
摘要： Aspects of the subject technology relate to systems and methods for identifying the quality of cement bonding of an exterior surface of a wellbore casing to an Earth formation. Methods of the present disclosure may allow for bond indexes to be identified in real-time as a cementing operation is performed even when tools that perform the cementing operation generate acoustic noise that interfere with measurements used to evaluate cement bonding quality. These methods may include transmitting acoustic signals, receiving acoustic signals, filtering the received acoustic signals, identifying magnitude and attenuation values to associate with the received acoustic signals, and comparing trends in the magnitudes with the identified attenuation values. These methods may also include correcting attenuation values associated with measured data based on a set of correction rules such that bond indexes can be identified. Such correction rules may be associated with data generated by a computer model.
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公开(公告)号：US20240219599A1
公开(公告)日：2024-07-04
申请号：US18150174
申请日：2023-01-04
发明人： Changhua ZHANG , Mingqiu LUO , Min ZHOU , Bin YU
摘要： Method and apparatus for performing a seismic full waveform inversion independent of a source wavelet to generate a final velocity model of subsurface formations of a survey region are provided. The method includes positioning seismic data recording sensors in the survey region; blasting at points of incidence in the survey region to generate seismic waves; and sensing and recording the seismic waves using the seismic data recording sensor. The recorded seismic waves are seismic data. The method further includes transmitting the seismic data to a computer system including one or more memories and storing the seismic data in one or more memories; storing a source wavelet in the one or more memories; performing, by the computer system, a forward modeling operation using the source wavelet; and generating, by the computer system, the final velocity model for the seismic full waveform inversion using the forward modeling operation.
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9.发明授权公开(公告)号：US12000973B2
公开(公告)日：2024-06-04
申请号：US17659913
申请日：2022-04-20
发明人： Sandip Bose , Ralph D'Angelo , Smaine Zeroug
IPC分类号： G01V1/50
CPC分类号： G01V1/50 , G01V2210/74
摘要： Aspects described herein provide for methods and apparatus for characterizing azimuthal heterogeneities in a barrier installed outside an outer casing in a borehole traversing a formation in a cased hole configuration including an inner and outer casing. The approach is based on specific attributes in sonic signals acquired with an azimuthal and axial array receiver system located inside the inner casing. The methods include slowness-time-coherence (STC) processing based on specific arrivals identified in data acquired by axial arrays associated with multiple azimuthal sections of the receiver system. The specific arrivals contain STC signatures that can be examined in terms of coherence amplitude and localization within STC maps. Based on specific attributes in the sonic signals, an azimuthal coverage of the outer casing annular contents can be created.
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公开(公告)号：US11994642B2
公开(公告)日：2024-05-28
申请号：US17628611
申请日：2019-08-30
IPC分类号： G01V1/50 , E21B47/005 , E21B49/00 , G01V1/46 , G01V1/52
CPC分类号： G01V1/50 , E21B47/005 , E21B49/00 , G01V1/46 , G01V1/52 , G01V2210/1299 , G01V2210/1425 , G01V2210/1429 , G01V2210/32
摘要： Apparatus, methods, and systems for determining acoustic velocity behind casing or tubing in a subterranean wellbore. A method may include obtaining a plurality of waveform data sets corresponding to a plurality of propagation path regimes and obtaining a total wavefield across the receiver array. The method may also include determining a Green's function representing each of the plurality of propagation path regimes and determining a noise wavefield by convolving the Green's functions and a known transmitted pressure signal corresponding to the plurality of waveform data sets. The method may also include generating a reduced-noise wavefield by subtracting the noise wavefield from the total wavefield and estimating the acoustic velocity of a formation behind the casing or tubing from the reduce-noise wavefield.
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