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公开(公告)号：US20240352855A1
公开(公告)日：2024-10-24
申请号：US18302502
申请日：2023-04-18
发明人： Natasa Mekic , Richard Pemper , Gregory Schmid
CPC分类号： E21B49/087 , E21B49/00 , G01V5/102 , E21B2200/20 , E21B2200/22
摘要： Methods, tools, and systems for determining two-phase borehole fluid holdup using pulsed neutron (PN) measurements are described. Embodiments of the techniques involve using formation models that are extended/extrapolated (or remodeled) to a value of 100 p.u., which correlates to the borehole environment where there is no formation matrix present. Those models can be used to determine the fractional relationship of oil and water in the borehole based on carbon and oxygen ratios provided by the PN measurement.
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公开(公告)号：US12037895B2
公开(公告)日：2024-07-16
申请号：US18197570
申请日：2023-05-15
申请人： CARBO CERAMICS INC.
发明人： Jeremy Zhang , Harry D. Smith, Jr.
摘要： The present disclosure is directed to methods for evaluating a gravel pack, a frac-pack, or cement in a wellbore. In at least one embodiment, a method for evaluating a gravel pack, frac-pack or cement in a wellbore, includes pumping a first material into the wellbore, wherein the first material comprises a first tracer that is not radioactive. The method includes pumping a second material into the wellbore, wherein the second material comprises a second tracer that is not radioactive. The method includes obtaining a set of data using the downhole tool in the wellbore after the first and second materials are pumped into the wellbore. The method includes obtaining a baseline using the downhole tool in the wellbore in a depth interval without the first or second material. The method includes comparing the set of data with the baseline.
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公开(公告)号：US11994647B2
公开(公告)日：2024-05-28
申请号：US17550588
申请日：2021-12-14
IPC分类号： G01V5/10
CPC分类号： G01V5/101
摘要： Aspects of the subject technology relate to determining holdup compensated formation saturation while refraining from calculating holdup. Inelastic gamma spectrum data for an inelastic gamma spectrum generated downhole in a wellbore can be accessed. Further, capture gamma spectrum data for one or more capture gamma spectrums generated downhole in the wellbore can be accessed. A model that accounts for holdup measurement can be applied to both the inelastic gamma spectrum data and the capture gamma spectrum data to identify a compensated oil saturation for a formation surrounding at least a portion of the wellbore based on both the inelastic gamma spectrum and the one or more capture gamma spectrums.
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公开(公告)号：US20240114612A1
公开(公告)日：2024-04-04
申请号：US17957026
申请日：2022-09-30
发明人： Zilu ZHOU , Weijun GUO
摘要： A method includes operating a neutron generator in a loading mode by ionizing ionizable gas within an ion source of the neutron generator to create a plurality of ions, and accelerating the plurality of ions by providing a first voltage to a target rod that supports the target to create a first ion beam that bombards a target of the neutron generator. The method also includes operating the neutron generator in a generating mode to generate a plurality of neutrons by accelerating the plurality of ions by providing a second voltage to the target rod to create a second ion beam that bombards the target. The second voltage is greater than the first voltage.
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公开(公告)号：US20240077636A1
公开(公告)日：2024-03-07
申请号：US17903649
申请日：2022-09-06
CPC分类号： G01V5/102 , G01V3/20 , G01V11/002
摘要： A determination of a continuous oil density log for a hydrocarbon reservoir accessible via a well drilling into the formation having the reservoir. The logging operations may be conducted in the well to generate a carbon-oxygen ratio (C/O) log, a water saturation log, and a porosity log. A continuous oil density log may be determined using the C/O log, the water saturation log, the porosity log, and carbon and oxygen density values. The continuous oil density log may be used in further characterization and development of the hydrocarbon reservoir.
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公开(公告)号：US11887746B2
公开(公告)日：2024-01-30
申请号：US17532507
申请日：2021-11-22
IPC分类号： G21G4/02 , H05H3/06 , G01V5/10 , H01J35/04 , H01J35/14 , H01J35/00 , H05G1/10 , H05G1/02 , H05G1/00
CPC分类号： G21G4/02 , H05H3/06 , G01V5/10 , H01J35/00 , H01J35/04 , H01J35/14 , H01J2235/023 , H05G1/00 , H05G1/02 , H05G1/10
摘要： Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.
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公开(公告)号：US20230350094A1
公开(公告)日：2023-11-02
申请号：US17731559
申请日：2022-04-28
发明人： Zilu Zhou , Weijun Guo
IPC分类号： G01V5/10
CPC分类号： G01V5/10
摘要： A downhole neutron generator includes a housing, a gas reservoir positionable within the housing, a target rod positionable within the housing and having a longitudinal axis aligned with a central axis of the housing, an ion source positionable adjacent to the gas reservoir and between the target rod and the gas reservoir, and a target positionable on a surface of the target rod facing the ion source. The target includes a first metal layer on the surface of the target rod and a second metal layer positionable adjacent to the first metal layer facing the ion source. The second metal layer is a scandium layer.
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公开(公告)号：US11774631B2
公开(公告)日：2023-10-03
申请号：US17250041
申请日：2019-05-10
发明人： Joan Abadie , Mohammad Taghi Salehi , Koji Ito , John Rasmus , Xiao Bo Hong
IPC分类号： G01V5/10
CPC分类号： G01V5/107
摘要： A method can include receiving neutron data and density data for a borehole in a geologic formation; determining a migration length value for a layer of the geologic formation based at least in part on the neutron data; forward modeling at least the layer based at least in part on the migration length value and the density data; and outputting, based at least in part on the forward modeling, modeled neutron data for the layer.
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9.发明公开公开(公告)号：US20230194748A1
公开(公告)日：2023-06-22
申请号：US18109940
申请日：2023-02-15
发明人： Philip Teague , Alex Stewart
IPC分类号： G01V5/12 , G01V5/10 , E21B47/005
CPC分类号： G01V5/12 , G01V5/104 , E21B47/005
摘要： An x-ray based cement evaluation tool for measurement of the density of material volumes within single, dual and multiple-casing wellbore environments is provided, wherein the tool uses x-rays to illuminate the formation surrounding a borehole, and a plurality of detectors are used to directly measure the density of the cement annuli and any variations in density within The tool uses x-rays to illuminate the casing surrounding a borehole and a plurality of multi-pixel imaging detectors directly measure the thickness of the casing The tool includes an internal length having a sonde section, wherein the sonde section further includes an x-ray source; a radiation shield for radiation measuring detectors; sonde-dependent electronics; and a plurality of tool logic electronics and PSUs. Other systems and subsystems appropriate for carrying out the foregoing are also disclosed, as are a plurality of example methods of use therefor.
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公开(公告)号：US11665806B2
公开(公告)日：2023-05-30
申请号：US16722887
申请日：2019-12-20
发明人： Jani Reijonen , Vincent Ernst
IPC分类号： G01V5/10 , G01V5/12 , H05G1/52 , H01J35/14 , G01N23/203
CPC分类号： H05G1/52 , G01V5/10 , G01V5/12 , H01J35/153 , G01N2223/053 , G01N2223/063 , G01N2223/106 , G01N2223/1016 , G01N2223/304 , G01N2223/616
摘要： The present disclosure relates to a downhole tool that includes a first photon flux detector disposed at a first radial position about a longitudinal axis of the downhole tool that measures a first signal indicative of an x-ray flux of the x-ray photons. The downhole tool also includes a second photon flux detector disposed at a second radial position about the longitudinal axis of the downhole tool that measures a second signal indicative of the x-ray flux of the x-ray photons. Further, the downhole tool includes a controller communicatively coupled to the first photon flux detector and the second photon flux detector that determines a condition associated with the electron beam based at least in part on a relative x-ray flux from the first photon flux detector and the second photon flux detector.
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