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1.发明授权公开(公告)号：US11313223B2
公开(公告)日：2022-04-26
申请号：US16470539
申请日：2018-12-10
Applicant: PETROCHINA COMPANY LIMITED
Inventor： Hongliang Wu , Ning Li , Zhou Feng , Changlin Lan , Tao Lv , Kewen Wang , Qingfu Feng
Abstract: A gamma ray spectrum unfolding method for elemental capture spectroscopy logging and a device therefor including the steps of first preprocessing the data obtained from an elemental capture spectrometry instrument; constructing a primary element group and an auxiliary element group according to the degree of interactions among the elements via theoretical analysis and numerical calculation of spectrum profiles, characteristic peak channels, and backgrounds of different elements; unfolding by using the least square method based on the construction of the primary element group and the auxiliary element group; and finally reconstructing the spectrum based on theory according to the yield of each element obtained by unfolding with the least square method, and comparing the measured gamma ray spectrum with the reconstructed gamma ray spectrum for error control, thereby improving the spectrum unfolding precision.
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公开(公告)号：US11112527B2
公开(公告)日：2021-09-07
申请号：US16095432
申请日：2017-05-15
Applicant: PetroChina Company Limited
Inventor： Ning Li , Kewen Wang , Yujiang Shi , Hongliang Wu , Taiping Zhao , Qingfu Feng , Zhou Feng , Haitao Zhang , Baoding Zhu , Xiaoming Yang
Abstract: The present application provides a method and a system for determining a saturation exponent of a heterogeneous carbonate reservoir. The method comprises: dividing a target reservoir into at least two reservoir types in accordance with a predetermined rule; obtaining a correspondence relationship between a saturation exponent and a bound water saturation in each of the reservoir types; determining the reservoir type to which a to-be-measured core belongs in accordance with the predetermined rule; obtaining a bound water saturation of the to-be-measured core; and calculating the saturation exponent of the to-be-measured core according to the bound water saturation of the to-be-measured core on the basis of the correspondence relationship of the reservoir type to which the to-be-measured core belongs.
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公开(公告)号：US20180246999A1
公开(公告)日：2018-08-30
申请号：US15749290
申请日：2016-10-10
Applicant: PetroChina Company Limited
Inventor： Zhou Feng , Ning Li , Hongliang Wu , Huafeng Wang , Qingfu Feng , Kewen Wang
CPC classification number: G06F17/5009 , E21B41/0092 , E21B49/00 , E21B49/02 , G01V99/00 , G06F17/50
Abstract: The present invention provides a stratum component optimization determination method and device, which fall within the technical field of oil-gas exploration well logging. The method comprises: establishing a stratum rock component model according to core analysis data and geological conditions of a stratum to be detected, and determining a well logging curve determined by a participation model; determining a well logging response equation expression corresponding to the well logging curve determined by the participation model; parsing, recording and storing the well logging response equation expression, establishing a target function of an optimization problem, and solving the target function through an iteration algorithm to determine an optimal component content of the stratum to be detected. By establishing the stratum rock component model, determining corresponding well logging response equation, and parsing through an expression parsing method and recording and storing the well logging response equation expression, and then, establishing the target function of the optimization problem, and obtaining the optimal component content of the stratum to be detected through the iteration algorithm, the present invention can not only optimizes the self-defined well logging response equation expression of the user, but achieves a high processing precision.
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公开(公告)号：US20180246254A1
公开(公告)日：2018-08-30
申请号：US15942356
申请日：2018-03-30
Applicant: PetroChina Company Limited
Inventor： Hongliang Wu , Zhou Feng , Ning Li , Kewen Wang , Qingfu Feng , Gong Zhang
CPC classification number: G01V99/005 , E21B49/00 , E21B49/02 , E21B49/08 , G01V5/101
Abstract: Disclosed is a method of acquiring the rock component content in a stratum, the method comprising: on the basis of acquired element capture spectroscopy logging data, performing normalization processing on each element yield in the stratum rock components; on the basis of an element yield curve obtained from the normalization processing and a pre-established stratum rock interpretation model, establishing a logging curve response equation set; and utilizing the established logging curve response equation set and an optimization algorithm, calculating the content of a rock component in a stratum. The method and device can directly process element yield data of element capture spectroscopy logging, and can improve the accuracy of calculating the rock component in a stratum.
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公开(公告)号：US10401311B2
公开(公告)日：2019-09-03
申请号：US15888809
申请日：2018-02-05
Applicant: PetroChina Company Limited
Inventor： Hongliang Wu , Ning Li , Changlin Lan , Zhou Feng , Qingfu Feng , Kewen Wang
IPC: G01N23/222 , G01N23/2204 , G01V5/10
Abstract: The present invention provides a method and a device for measuring a formation elemental capture gamma ray spectrum, pertaining to the field of oil-gas exploration and well logging technologies. The method comprises: performing moderation on neutrons emitted from a neutron source according to a neutron capture cross section of a test sample; and adjusting a relative location of the test sample with respect to the neutron source, so that a standard capture gamma ray spectrum of the test sample is measured and obtained at a location where a thermal neutron flux reacting with atomic nucleuses of the test sample reaches a first predetermined value. The present invention performs moderation on a neutron source according to neutron capture cross sections of different test samples to measure and obtain elemental capture gamma ray spectra of the test samples, thereby obtaining various formation elemental capture gamma ray spectra with higher accuracy.
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Patent Agency Ranking
公开(公告)号：US20180172608A1
公开(公告)日：2018-06-21
申请号：US15888809
申请日：2018-02-05
Applicant: PetroChina Company Limited
Inventor： Hongliang WU , Ning Li , Changlin Lan , Zhou Feng , Qingfu Feng , Kewen Wang
IPC: G01N23/222 , G01N23/2204
CPC classification number: G01N23/222 , G01N23/2204 , G01V5/101
Abstract: The present invention provides a method and a device for measuring a formation elemental capture gamma ray spectrum, pertaining to the field of oil-gas exploration and well logging technologies. The method comprises: performing moderation on neutrons emitted from a neutron source according to a neutron capture cross section of a test sample; and adjusting a relative location of the test sample with respect to the neutron source, so that a standard capture gamma ray spectrum of the test sample is measured and obtained at a location where a thermal neutron flux reacting with atomic nucleuses of the test sample reaches a first predetermined value. The present invention performs moderation on a neutron source according to neutron capture cross sections of different test samples to measure and obtain elemental capture gamma ray spectra of the test samples, thereby obtaining various formation elemental capture gamma ray spectra with higher accuracy.
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公开(公告)号：US11086034B2
公开(公告)日：2021-08-10
申请号：US16159052
申请日：2018-10-12
Applicant: PetroChina Company Limited
Inventor： Ning Li , Hongliang Wu , Zhou Feng , Peng Liu , Kewen Wang , Qingfu Feng , Yusheng Li
IPC: G01V1/30 , G01V3/20 , G01V11/00 , E21B49/00 , G01V1/50 , G16Z99/00 , G01N15/08 , G01V3/38 , G01V5/04
Abstract: The embodiments of the present disclosure disclose a method and an apparatus for determining the permeability of the reservoir. The method comprises: acquiring logging data corresponding to the two zones at least; determining the permeability of a specified zone in the two zones at least based on logging data corresponding to the specified zone, wherein the specified zone represents any one of the two zones at least; setting weight values corresponding to the at least two zones respectively; and determining the permeability of the reservoir based on the weight values and the permeability respectively corresponding to the two zones at least. The technical solutions provided by the embodiments of the present disclosure can improve the accuracy of the determined permeability of the reservoir.
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公开(公告)号：US11010507B2
公开(公告)日：2021-05-18
申请号：US15749290
申请日：2016-10-10
Applicant: PetroChina Company Limited
Inventor： Zhou Feng , Ning Li , Hongliang Wu , Huafeng Wang , Qingfu Feng , Kewen Wang
Abstract: The present invention provides a stratum component optimization determination method and device, which fall within the technical field of oil-gas exploration well logging. The method comprises: establishing a stratum rock component model according to core analysis data and geological conditions of a stratum to be detected, and determining a well logging curve determined by a participation model; determining a well logging response equation expression corresponding to the well logging curve determined by the participation model; parsing, recording and storing the well logging response equation expression, establishing a target function of an optimization problem, and solving the target function through an iteration algorithm to determine an optimal component content of the stratum to be detected. By establishing the stratum rock component model, determining corresponding well logging response equation, and parsing through an expression parsing method and recording and storing the well logging response equation expression, and then, establishing the target function of the optimization problem, and obtaining the optimal component content of the stratum to be detected through the iteration algorithm, the present invention can not only optimizes the self-defined well logging response equation expression of the user, but achieves a high processing precision.
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公开(公告)号：US10962679B2
公开(公告)日：2021-03-30
申请号：US15942356
申请日：2018-03-30
Applicant: PetroChina Company Limited
Inventor： Hongliang Wu , Zhou Feng , Ning Li , Kewen Wang , Qingfu Feng , Gong Zhang
Abstract: Disclosed is a method of acquiring the rock component content in a stratum, the method comprising: on the basis of acquired element capture spectroscopy logging data, performing normalization processing on each element yield in the stratum rock components; on the basis of an element yield curve obtained from the normalization processing and a pre-established stratum rock interpretation model, establishing a logging curve response equation set; and utilizing the established logging curve response equation set and an optimization algorithm, calculating the content of a rock component in a stratum. The method and device can directly process element yield data of element capture spectroscopy logging, and can improve the accuracy of calculating the rock component in a stratum.
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10.发明申请公开(公告)号：US20180274364A1
公开(公告)日：2018-09-27
申请号：US15990054
申请日：2018-05-25
Applicant: PetroChina Company Limited
Inventor： Ning Li , Hongliang Wu , Zhou Feng , Qingfu Feng , Kewen Wang , Xiaotao Zhang , Gong Zhang
CPC classification number: E21B49/00 , E21B47/0002 , G01V1/40 , G01V3/18 , G01V8/02 , G01V11/00 , G06K9/0014 , G06K9/0063 , G06K9/4652 , G06K9/6268 , G06K9/629 , G06T7/0004 , G06T7/40 , G06T7/90 , G06T2207/10024 , G06T2207/30184
Abstract: The present invention relates to the technical field of well logging interpretation. The present invention provides a method for determining the karst development degree of a reservoir, a computer readable storage medium and a device, and pertains to the technical field of well logging interpretation, the method comprising: extracting vertical denudation pore features and horizontal denudation pore features from electrical imaging logging image data of a undetermined reservoir, and counting well logging feature parameters; determining karst belts of the undetermined reservoir and classifying the karst development degree according to the vertical denudation pore features, the horizontal denudation pore features and the well logging feature parameters; and determining the available reservoir development degree of the undetermined reservoir according to the karst belts and the result of the classified karst development degree. By means of classifying the karst development degree of the undetermined reservoir based on the vertical denudation pore features, the horizontal denudation pore features and the well logging feature parameters extracted from the electrical imaging logging image data, we can quickly and visually identify karst belts in a reservoir and classify the karst development degree. And the discrimination result is consistent with that of cores, which provides important technical supports for exploration and development of an oil-gas field.
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