Deep learning holdup solution from neutron capture and inelastic scattering

    公开(公告)号:US12228031B2

    公开(公告)日:2025-02-18

    申请号:US17412078

    申请日:2021-08-25

    Abstract: Systems and methods of the present disclosure relate to determining a borehole holdup. A method comprises logging a well with a pulsed-neutron logging (PNL) tool; receiving, via the PNL tool, transient decay measurements, capture spectrum measurements, and inelastic spectrum measurements; extracting information from each of the capture spectrum measurements, the inelastic spectrum measurements, and the transient decay measurements; inputting all of the extracted information as a single input into artificial neural networks; and determining the borehole holdup with the artificial neural networks.

    Radially adjustable outsert for a downhole sensor

    公开(公告)号:US12055033B2

    公开(公告)日:2024-08-06

    申请号:US17260091

    申请日:2018-09-24

    CPC classification number: E21B47/01 E21B47/08 G01V11/005

    Abstract: A downhole tool and method of utilizing the downhole tool to make measurements in a wellbore formed in a formation and having different wellbore diameters. The downhole tool generally includes a tool body defined along a longitudinal central axis and having an internal passage extending longitudinally therethrough and an external pocket extending therealong; a sensor module having a sensor and being deployed within the external pocket; a spacer deployed in the external pocket, the spacer positioned between the sensor module and the tool body; and a clamp attached to the tool body, the clamp overlaying both the sensor module and the spacer to confine the sensor module within the external pocket. The spacer may have an inner concave surface engaging the sensor module and an outer convex surface seating in the external pocket.

    Compensated formation saturation using assisted physics and neural networks

    公开(公告)号:US11994647B2

    公开(公告)日:2024-05-28

    申请号:US17550588

    申请日:2021-12-14

    CPC classification number: G01V5/101

    Abstract: 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.

    THROUGH-TUBING, CASED-HOLE SEALED MATERIAL EVALUATION USING ACOUSTIC MEASUREMENTS

    公开(公告)号:US20220381138A1

    公开(公告)日:2022-12-01

    申请号:US17303380

    申请日:2021-05-27

    Abstract: A method for evaluating a sealing material positioned between a casing of a wellbore and a subsurface formation in which the wellbore is formed includes emitting an acoustic waveform outward from a position within the casing and detecting a return waveform that is generated in response to the acoustic waveform interacting with a region of interest that includes at least a portion of the sealing material. The method includes determining a first time window of the return waveform associated with the region of interest and trimming the return waveform based on the first time window. The method further includes determining a first spectral power density for the first time window of the trimmed return waveform and determining a composition ratio for the region of interest based on the first spectral power density.

    Density measurement of a selected layer by gamma spectral deconvolution

    公开(公告)号:US11378715B2

    公开(公告)日:2022-07-05

    申请号:US16886475

    申请日:2020-05-28

    Abstract: A method and system for determining a density. The method may comprise disposing a nuclear density tool into a wellbore, performing a spectral deconvolution, determining an energy channel for a first measurement layer, recording a count rate with the gamma detector for the first measurement layer, applying a slope operator to the count rate, and identifying a first density of the first measurement layer. The system may comprise a nuclear density tool that includes a gamma source and a gamma detector configured to record a count rate, wherein the gamma detector and the gamma source are disposed on a longitudinal axis of the nuclear density tool. The system may also comprise an information handling system.

    SYSTEM AND METHOD OF DRILLING A WELLBORE USING WELLBORE AND SURFACE GRAVITY SENSING

    公开(公告)号:US20230063340A1

    公开(公告)日:2023-03-02

    申请号:US17894704

    申请日:2022-08-24

    Abstract: A system for drilling a wellbore into an earth formation includes a logging tool in the wellbore having at least one near-range measurement sensor, and a processor. The processor is configured to receive, at each depth along the wellbore, near-range measurement data and reference data related to a density of the formation, determine one or more near-range earth models that include a density model of a layer at each depth based on the near-range data constrained by the reference data, receive surface gravitational data from multiple surface locations, determine a mid-range or far-range formation model based on the near-range earth model and the surface gravitational data, and provide the mid-range or far-range formation model to a well driller for geosteering a drill bit into the earth formation.

    THROUGH-TUBING, CASED-HOLE SEALED MATERIAL DENSITY EVALUATION USING GAMMA RAY MEASUREMENTS

    公开(公告)号:US20220373484A1

    公开(公告)日:2022-11-24

    申请号:US17303070

    申请日:2021-05-19

    Abstract: Through-tubing, cased-hole sealed material density can be evaluated using gamma ray measurements. Density evaluation comprises detecting, by at least one detector positioned within a casing of a wellbore including a sealing material positioned between the casing and a subsurface formation, electromagnetic radiation generated in response to nuclear radiation being emitted outward toward the subsurface formation, determining an electromagnetic radiation count based on the detected electromagnetic radiation, selecting at least one of a first reference material having a density that is less than a density of the sealing material and a second reference material having a density that is greater than the density of the sealing material, adjusting the electromagnetic radiation count based on the density of the at least one of the first reference material and the second reference material, and determining a density of the sealing material based on the adjusted electromagnetic radiation count.

    Trajectory control for directional drilling using azimuthal gamma ray measurements

    公开(公告)号:US11237294B2

    公开(公告)日:2022-02-01

    申请号:US17087384

    申请日:2020-11-02

    Abstract: A method includes receiving a drilling parameter, a tool characterization parameter, and a formation model. The method includes generating a forward model of a tool response at a bed boundary using the one drilling parameter, the tool characterization parameter, and the formation model. The method includes predicting at least two azimuthal gamma logs using the forward model. The method includes determining that a difference between the at least two azimuthal gamma logs generates a confidence level that is greater than a confidence threshold. In response to determining that the difference between the at least two azimuthal gamma logs generates the confidence level that is greater than the confidence threshold, the method includes generating a well plan. The method includes outputting a command for controlling a trajectory in directionally drilling a wellbore within a formation associated with the formation model using the well plan.

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