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11.发明授权公开(公告)号：US11927711B2
公开(公告)日：2024-03-12
申请号：US17601990
申请日：2019-05-21
发明人： Ruijia Wang , Baichun Sun
CPC分类号： G01V1/50 , E21B49/00 , G01V1/46 , G01V1/52 , E21B2200/20 , G01V2210/1299 , G01V2210/1429 , G01V2210/324 , G01V2210/47 , G01V2210/614 , G01V2210/6222 , G01V2210/66
摘要： Apparatus, methods, and systems for determining body wave slowness values for a target formation zone. A method includes selecting a target axial resolution based on the size of a receiver array, obtaining a plurality of waveform data sets corresponding to a target formation zone and each acquired at a different shot position, reconstructing the plurality of waveform data sets to generate a plurality of subarray data sets corresponding to the target formation zone, determining a slowness value for each subarray data set and determining a slowness versus offset value for each subarray data set. The method may also include generating a borehole model having at least one alteration formation zone and a virgin formation zone and generating a slowness versus offset model based at least in part on the borehole model. The method may also include determining a radial depth of the alteration formation zone.
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公开(公告)号：US11920467B2
公开(公告)日：2024-03-05
申请号：US17575214
申请日：2022-01-13
发明人： Yunlai Yang , Wei Li
CPC分类号： E21B49/003 , G01R23/17 , G01V1/46 , G01V1/50 , G01V2200/16 , G01V2210/1216
摘要： Systems and methods include a computer-implemented method for determining normalized apparent power. Drilling acoustic signals corresponding to a time domain and generated during drilling of a well. A fast Fourier transformation (FFT) is performed using the drilling acoustic signals to generate FFT data. Normalized FFT data is generated using normalization parameters and a drill string rotation rate record of a drill string used to drill the well. The drill string rotation rate is received during drilling. Normalized apparent power is determined from data points of a predetermined top percentage of the normalized FFT data within a lithological significant frequency range. The normalized apparent power is a measure of the power of the drilling acoustic signals and it is a function of the amplitude and frequency of the normalized FFT data. The lithological significant frequency range is a frequency range within which the drill sounds are more closely related with lithology.
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13.发明授权公开(公告)号：US11906695B2
公开(公告)日：2024-02-20
申请号：US16816770
申请日：2020-03-12
CPC分类号： G01V99/00 , E21B49/0875 , G01V1/46 , G01V1/48 , G06N3/084
摘要： A method may include obtaining dielectric log data regarding a geological region of interest. The method may further include generating sponge core data of the geological region of interest using a neural network model and the dielectric log data. The neural network model may be trained using various dielectric logs from various well sources. The method may further include determining, using the sponge core data, an amount of hydrocarbons in the geological region of interest.
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公开(公告)号：US11906682B2
公开(公告)日：2024-02-20
申请号：US17608045
申请日：2019-06-11
CPC分类号： G01V1/46 , G01V1/226 , G01V1/50 , G01V1/52 , G01V8/24 , G01V2210/6169 , G01V2210/72
摘要： A wellbore system includes a logging unit having a retrievable logging cable coupled to a downhole tool within a wellbore and a depth correlation unit in the downhole tool that provides current depth data for the wellbore through the retrievable logging cable for recording of a current depth by the logging unit. The wellbore system also includes a distributed acoustic sensing unit that includes a seismic processing unit and a seismic profiling unit connected to a separate optical cable of the retrievable logging cable having distributed acoustic sensing channels, wherein an assignment of the distributed acoustic sensing channels along the separate optical cable is determined by an offset distance between the current depth of a formation reference region within the wellbore and a previous reference depth of the formation reference region within the wellbore. A distributed acoustic sensing method is also included.
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公开(公告)号：US11774619B2
公开(公告)日：2023-10-03
申请号：US16610062
申请日：2019-01-14
发明人： Ruijia Wang , Jing Jin , Yao Ge
CPC分类号： G01V1/46 , G01V1/50 , G01V2210/127 , G01V2210/54
摘要： A logging tool for performing well logging activities in a geologic formation has one or more transmitters, one or more receivers, and a tool wave propagating factor which differs from a formation wave propagating factor. The one or more transmitters excite a tool wave and formation wave. The tool wave is reduced by the one or more transmitters transmitting an acoustic wave which causes the tool wave to be reduced. Additionally, or alternatively, the tool wave is reduced by generating an inverse estimate of the tool wave based on waveform data associated with the tool wave and formation wave received by each of the one or more receivers.
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公开(公告)号：US20230243634A1
公开(公告)日：2023-08-03
申请号：US17589015
申请日：2022-01-31
发明人： Bin DAI , Christopher Michael JONES
摘要： The subject disclosure relates to techniques for correcting logging depth of a well bore. A process of the disclosed technology can include receiving a first sensor measurement from a first sensor disposed in a wellbore, receiving a second sensor measurement from a second sensor disposed in the wellbore, wherein the first sensor and the second sensor are disposed on a wireline with a predetermined distance between the first sensor and the second sensor, generating a correlation function based on the first sensor measurement and the second measurement, and determining, based on the correlation function, whether the measurements indicate a perceived distance between the first sensor and the second sensor deviating from the predetermined distance.
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公开(公告)号：US20230041525A1
公开(公告)日：2023-02-09
申请号：US17758812
申请日：2021-01-22
发明人： Xiao Bo Hong , Keli Sun , Koji Ito , Xiaoyan Zhong
摘要： A method can include receiving data for a geologic region; based at least in part on the data, selecting a model from a plurality of models using a trained machine learning model, and inverting the data using the selected model to determine parameters of the selected model.
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公开(公告)号：US11506021B2
公开(公告)日：2022-11-22
申请号：US16604567
申请日：2018-06-15
发明人： Yingwei Yu
摘要： A method includes acquiring data associated with a field operation of equipment in a geologic environment; filtering the data using a filter where the filter includes, along a dimension, a single maximum positive value that decreases to a single minimum negative value that increases to approximately zero; and, based on the filtering, issuing a control signal to the equipment in the geologic environment.
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19.发明授权公开(公告)号：US11493659B2
公开(公告)日：2022-11-08
申请号：US16759667
申请日：2018-10-25
发明人： Bo Fan , Maja Skataric , Sandip Bose , Shuchin Aeron , Smaine Zeroug
摘要： A sonic tool is activated in a well having multiple casings and annuli surrounding the casing. Detected data is preprocessed using slowness time coherence (STC) processing to obtain STC data. The STC data is provided to a machine learning module which has been trained on labeled STC data. The machine learning module provides an answer product regarding the states of the borehole annuli which may be used to make decision regarding remedial action with respect to the borehole casings. The machine learning module may implement a convolutional neural network (CNN), a support vector machine (SVM), or an auto-encoder.
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公开(公告)号：US11492899B2
公开(公告)日：2022-11-08
申请号：US16607853
申请日：2017-05-24
发明人： Mikko Jaaskelainen
IPC分类号： E21B49/00 , E21B47/07 , E21B43/263 , E21B47/06 , E21B47/18 , G01K3/14 , G01K11/32 , G01V1/104 , G01V1/143 , G01V1/16 , G01V1/22 , G01V1/46 , E21B33/12
摘要： Methods and systems for characterizing fractures in a subterranean formation are provided. The method includes introducing an encapsulated explosive unit into a casing located in a wellbore within the subterranean formation and maintaining the encapsulated explosive unit in a stage of the casing. The method also includes detonating the encapsulated explosive unit within the stage to generate a pressure wave that passes through a group of perforations and into the fractures and measuring a reflected pressure wave using a pressure sensor coupled to the bridge plug to produce a pressure measurement. The method further includes converting the pressure measurement into an acoustic signal correlated with the pressure measurement by an acoustic signal generator contained in the bridge plug and transmitting the acoustic signal to apply acoustic pressure on a fiber optic cable coupled to an exterior surface of the casing.
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