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公开(公告)号：US20220373706A1
公开(公告)日：2022-11-24
申请号：US17327792
申请日：2021-05-24
发明人： Brenno Caetano Troca Cabella , Ruijia Wang , Chung Chang , Qingtao Sun , Yao Ge , Xiang Wu , Pablo Vieira Rego , Marco Aurelio Luzio , João Vicente Gonçalves Rocha
IPC分类号： G01V1/50 , G01N33/38 , G01V1/02 , E21B47/005 , G06F30/20
摘要： Methods, systems, and program products are disclosed for implementing acoustic logging and determining wellbore material characteristics. In some embodiments, a method may include determining a polar differential signal for each of one or more pairs of azimuthally offset acoustic measurements within a wellbore. A reference azimuth is identified based, at least in part, on comparing the polar differential signals to a modeled bonding differential signal within a target response window. The method further includes determining differences between an acoustic measurement at the reference azimuth and acoustic measurements at one or more other azimuths and determining a wellbore material condition based, at least in part, on the determined differences.
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公开(公告)号：US20220298915A1
公开(公告)日：2022-09-22
申请号：US17834620
申请日：2022-06-07
发明人： Jing Jin , Glenn Andrew Wilson , Wei Li , Xiang Wu
摘要： A method includes positioning a downhole tool in a borehole formed in a subsurface formation, wherein the downhole tool comprises a plurality of calipers arranged around a circumference of the downhole tool. The method includes detecting, using the plurality of calipers, a plurality of standoff measurements at different rotation angles and determining a plurality of apparent diameters of the borehole for the different rotation angles of the downhole tool based on the plurality of standoff measurements and at least one of a radius and a diameter of the downhole tool. The method includes determining a probability function based on the plurality of apparent diameters and determining a shape of the borehole based on the probability function.
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公开(公告)号：US20220082720A1
公开(公告)日：2022-03-17
申请号：US17534630
申请日：2021-11-24
摘要： Various embodiments include apparatus and methods implemented to take into consideration gauge length in optical measurements. In an embodiment, systems and methods are implemented to interrogate an optical fiber disposed in a wellbore, where the optical fiber is subjected to seismic waves, and to generate a seismic wavefield free of gauge length effect and/or to generate a prediction of a seismic wavefield of arbitrary gauge length, based on attenuation factors of a plurality of wavefields acquired from interrogating the optical fiber. In an embodiment, systems and methods are implemented to interrogate an optical fiber disposed in a wellbore, where the optical fiber is subjected to seismic waves, and to convert a seismic wavefield associated with a first gauge length to a seismic wavefield associated with a different gauge length that is a multiple of the first gauge length. Additional apparatus, systems, and methods are disclosed.
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公开(公告)号：US20210199829A1
公开(公告)日：2021-07-01
申请号：US16062053
申请日：2016-12-29
摘要： A method and system for processing a slowness profile. A method may comprise disposing a geophone array into a borehole, positioning the geophone array at a first location within the borehole; discharging a seismic source; positioning the geophone array at a second location within the borehole; discharging the seismic source, wherein the seismic source produces an acoustic wave; recording a vertical seismic profiling dataset, wherein vertical seismic profiling comprises a dataset of recorded acoustic waves by the geophone array at the first location within the borehole and the second location within the borehole; picking a first gap travel time from the vertical seismic profiling dataset; and determining the slowness profile, wherein the slowness profile comprises determining a slowness of the acoustic wave through a formation by the geophone arrays. A well system may comprise a geophone array, comprising a plurality of geophones, and an information handling system.
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公开(公告)号：US20210148218A1
公开(公告)日：2021-05-20
申请号：US16637571
申请日：2019-05-14
IPC分类号： E21B47/085
摘要： A method for identifying a shape of a borehole may comprise disposing a measurement assembly into the borehole, transmitting a pressure pulse from the at least one transducer, recording the echo with the at least one transducer producing data points based at least in part on the echo to determine a distance from an inner wall of the borehole to the measurement assembly; performing a kurtosis on the data points; comparing a result of the kurtosis to a pre-determined threshold; and producing one or more repositioning results based at least in part on the comparing the result of the kurtosis to the pre-determined threshold. A system may comprise a measurement assembly which may include at least one transducer connected to the measurement assembly and an information handling system.
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公开(公告)号：US20210103069A1
公开(公告)日：2021-04-08
申请号：US16463689
申请日：2018-06-27
IPC分类号： G01V1/50 , G01V1/18 , G01V1/02 , E21B47/002 , E21B47/085 , B06B1/06
摘要： A well tool can be used in a wellbore that can measure characteristics of an object in the wellbore. The well tool includes an ultrasonic transducer for generating an ultrasonic wave in a medium of the wellbore. The ultrasonic transducer includes a front layer, a rear layer, backing material coupled to the rear layer, and piezoelectric material coupled to the front layer and to the backing material. The rear layer can improve signal-to-noise ratio of the transducer in applications such as imaging and caliper applications.
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公开(公告)号：US20210055436A1
公开(公告)日：2021-02-25
申请号：US16617627
申请日：2018-08-31
IPC分类号： G01V1/28 , G01V1/50 , G01V3/38 , E21B49/00 , E21B47/002
摘要： The disclosure relates generally to the inversion of geophysical and/or logging measurements for formation evaluation and monitoring. The disclosure may be related to methods of deconvolution and/or inversion of piecewise formation properties. A method for formation evaluation from a downhole tool may comprise disposing a downhole tool into a wellbore, broadcasting a signal into a formation penetrated by the wellbore, recording the signal from the formation with at least one receiver disposed on the downhole tool, computing an objective function, and determining formation properties by minimizing the objective function.
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公开(公告)号：US20160252651A1
公开(公告)日：2016-09-01
申请号：US14912270
申请日：2015-09-08
CPC分类号： G01V11/002 , E21B47/123 , G01H9/004 , G01V2210/324 , G01V2210/57
摘要： In accordance with embodiments of the present disclosure, systems and methods for downsampling DAS data in a way that enables accurate interpretation of acoustic events occurring in the data are provided. Such methods may be particularly useful when interpreting large sets of data, such as DAS VSP data collected during hydrocarbon recovery operations. The methods generally involve identifying data channels affected by noise from a DAS data set, and then interpolating from the surrounding data. This may improve the quality of the resulting downsampled data, with respect to the signal to noise ratio, compared to what would have occurred by merely decimating unwanted data channels. In addition, a priori information about channel fading, the desired downsampling rate, and the slowest expected elastic waves may be used to filter the DAS data. This may achieve a higher signal-to-noise ratio in the downsampled data.
摘要翻译： 根据本公开的实施例，提供了以能够对数据中发生的声学事件进行精确解释的方式对DAS数据进行下采样的系统和方法。 当解释大量数据（例如在烃回收操作期间收集的DAS VSP数据）时，这种方法可能是特别有用的。 这些方法通常涉及识别受DAS数据集的噪声影响的数据通道，然后从周围的数据进行内插。 与仅通过抽取不需要的数据信道所发生的情况相比，这可以提高相对于信噪比的结果下采样数据的质量。 此外，可以使用关于信道衰落，期望的下采样率和最慢的预期弹性波的先验信息来过滤DAS数据。 这可能在下采样数据中实现更高的信噪比。
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公开(公告)号：US20230097490A1
公开(公告)日：2023-03-30
申请号：US17481165
申请日：2021-09-21
发明人： Zhonghuan Chen , Bin Dai , Christopher Michael Jones , Xiang Wu
摘要： A method and a system for measuring downhole fluid properties. The downhole fluid sampling tool may comprise at least one probe and at least one passageway that passes through the at least one probe and into the downhole sampling tool. The method may comprise drawing a wellbore fluid through the at least one probe and through the at least one passageway, obtaining a first channel measurement of the wellbore fluid, obtaining at least a second channel measurement, clustering channel data from a plurality of channel measurements comprising the first channel measurement and the at least second channel measurement, and measuring a phase through a plurality of channels. The method may further comprise separating a plurality of phase signals based on the phase measured through the plurality of channels, labeling the wellbore fluid, assigning the plurality of phase signals to specific phases of a multi-phase fluid, and estimating a fluid property.
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公开(公告)号：US11592591B2
公开(公告)日：2023-02-28
申请号：US17334977
申请日：2021-05-31
发明人： Brenno Caetano Troca Cabella , Ruijia Wang , Yao Ge , Xiang Wu
IPC分类号： G01V1/50 , E21B49/00 , E21B47/00 , E21B47/005 , E21B47/14
摘要： Methods and systems are disclosed for determining a material property transition within a wellbore. In some embodiments, a method includes determining a material transition profile for each of a plurality of test points within a linear measurement path including, for each test point, determining an acoustic response for a first location within the linear measurement path, and determining an acoustic response for a second location within the linear measurement path. The test point is between the first and second locations. The method further includes generating a material transition profile for the test point based, at least in part, on a difference between the acoustic response at the first location and the acoustic response at the second location.
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