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公开(公告)号：US20230161068A1
公开(公告)日：2023-05-25
申请号：US17995319
申请日：2021-04-06
Applicant: Schlumberger Technology Corporation
Inventor： Isabelle Dubourg , Emmanuel Legendre , Fabrice Mege , Rina Baba
IPC: G01V3/28 , E21B47/00 , E21B47/085
CPC classification number: G01V3/28 , E21B47/006 , E21B47/085
Abstract: Methods and systems pertaining to a processing system and a downhole logging tool for investigating nested tubulars in a borehole. The downhole logging tool includes a transmitter coil for emitting a broadband excitation signal including one or more step excitations. The downhole logging tool also includes receiver coils including at least two receiver coils spaced apart from the transmitter coil at respective first and second distances from the transmitter, the first and second distances being distinct from each other, and each receiver coil being able to receive a response signal resulting from the excitation signal. The downhole logging tool also includes an acquisition system for recording the excitation signal and the response signal of each receiver coil over time. The processing system derives information indicative of variations in individual thicknesses of the nested casing tubulars based on variations of the response signals over time.
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2.发明申请公开(公告)号：US20170052272A1
公开(公告)日：2017-02-23
申请号：US15234380
申请日：2016-08-11
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Carlos Maeso , Isabelle Dubourg , Daniel Quesada
Abstract: The disclosure relates to a method for determining a fracture aperture of at least a fracture aperture in a wellbore, comprising: Measuring a resistivity of the wellbore with a downhole tool in a wellbore for obtaining an image of the wellbore, Detecting at least a fracture in the wellbore, Calculating a fracture aperture of the detected fracture according to a predetermined model of the wellbore, the model being set up based on at least an hypothesis relative to the configuration of the wellbore, Estimating a correction to the predetermined model when at least one of the hypothesis is not met, Based on at least a measured parameter relative to the wellbore and on the correction, determining an uncertainty range for the fracture aperture
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公开(公告)号：US10509141B2
公开(公告)日：2019-12-17
申请号：US15234380
申请日：2016-08-11
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Carlos Maeso , Isabelle Dubourg , Daniel Quesada
Abstract: A method for determining a fracture aperture of a fracture aperture in a wellbore comprises measuring a resistivity of the wellbore with a downhole tool in a wellbore for obtaining an image of the wellbore. Based on the image, the method detects fractures in the wellbore, and calculates a fracture aperture of the detected fracture according to a predetermined model of the wellbore set up based on hypothesis relative to the configuration of the wellbore. Then, the method estimates a correction to the predetermined model when at least one of the hypothesis is not met, and determines an uncertainty range for the fracture aperture also using a measured parameter.
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