公开(公告)号：US11899153B2

公开(公告)日：2024-02-13

申请号：US18065694

申请日：2022-12-14

Applicant: Schlumberger Technology Corporation

Inventor： Yang Liu ,  Ralph D'Angelo ,  Smaine Zeroug ,  Sandip Bose

IPC: G01V1/44 ,  E21B47/14 ,  E21B49/00 ,  E21B47/005 ,  E21B47/00

CPC classification number: G01V1/44 ,  E21B47/00 ,  E21B47/005 ,  E21B47/14 ,  E21B49/00

Abstract: A downhole tool including at least one transmitter, a receiver array, and a controller. Each receiver element of the receiver array is configured to apply variable amplification and a variable time delay to detected acoustic waveforms, wherein the variable amplification is controlled by an amplification factor assigned to the given receiver element, and wherein the variable time delay is controlled by a time delay assigned to the given receiver element. The controller assigns a set of amplification factors and time delays to the receiver elements of the receiver array and combines signals resulting from the application of the variable amplification and the variable time delay to the detected acoustic waveforms such that sensitivity of the receiver elements of the receiver array is focused at a desired zone-of-interest in a wellbore corresponding to the set of amplification factors and time delays assigned to the receiver elements of the receiver array.

公开(公告)号：US11531132B2

公开(公告)日：2022-12-20

申请号：US16495408

申请日：2018-03-26

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Yang Liu ,  Ralph D'Angelo ,  Smaine Zeroug ,  Sandip Bose

IPC: G01V1/44 ,  E21B47/14 ,  E21B49/00 ,  E21B47/005

Abstract: A method and downhole tool is provided that uses beamforming to localize acoustic energy at a desired zone-of-interest within a wellbore traversing a subterranean formation. The tool has an array of transmitter elements configured to emit guided mode acoustic signals at variable amplitude and variable time delay, which are individually controlled by an amplitude factor and time delay assigned to respective transmitter elements. A set of amplitude factors and time delays can be assigned to the transmitter elements of the transmitter array such that the transmitter elements produce a focused acoustic beam at the desired zone-of-interest by combination of guided mode acoustic signals transmitted by the transmitter elements.

公开(公告)号：US20220334284A1

公开(公告)日：2022-10-20

申请号：US17659913

申请日：2022-04-20

Applicant: Schlumberger Technology Corporation

Inventor： Sandip Bose ,  Ralph D'Angelo ,  Smaine Zeroug

IPC: G01V1/50

Abstract: Aspects described herein provide for methods and apparatus for characterizing azimuthal heterogeneities in a barrier installed outside an outer casing in a borehole traversing a formation in a cased hole configuration including an inner and outer casing. The approach is based on specific attributes in sonic signals acquired with an azimuthal and axial array receiver system located inside the inner casing. The methods include slowness-time-coherence (STC) processing based on specific arrivals identified in data acquired by axial arrays associated with multiple azimuthal sections of the receiver system. The specific arrivals contain STC signatures that can be examined in terms of coherence amplitude and localization within STC maps. Based on specific attributes in the sonic signals, an azimuthal coverage of the outer casing annular contents can be created.

公开(公告)号：US20230110473A1

公开(公告)日：2023-04-13

申请号：US18065694

申请日：2022-12-14

Applicant: Schlumberger Technology Corporation

Inventor： Yang Liu ,  Ralph D'Angelo ,  Smaine Zeroug ,  Sandip Bose

IPC: G01V1/44 ,  E21B47/14 ,  E21B49/00 ,  E21B47/005 ,  E21B47/00

Abstract: A method and downhole tool is provided that uses beamforming to localize acoustic energy at a desired zone-of-interest within a wellbore traversing a subterranean formation. The tool has an array of transmitter elements configured to emit guided mode acoustic signals at variable amplitude and variable time delay, which are individually controlled by an amplitude factor and time delay assigned to respective transmitter elements. A set of amplitude factors and time delays can be assigned to the transmitter elements of the transmitter array such that the transmitter elements produce a focused acoustic beam at the desired zone-of-interest by combination of guided mode acoustic signals transmitted by the transmitter elements.

公开(公告)号：US20200049850A1

公开(公告)日：2020-02-13

申请号：US16495408

申请日：2018-03-26

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Yang Liu ,  Ralph D'Angelo ,  Smaine Zeroug ,  Sandip Bose

IPC: G01V1/44 ,  E21B49/00 ,  E21B47/00 ,  E21B47/14

Abstract: A method and downhole tool is provided that uses beamforming to localize acoustic energy at a desired zone-of-interest within a wellbore traversing a subterranean formation. The tool has an array of transmitter elements configured to emit guided mode acoustic signals at variable amplitude and variable time delay, which are individually controlled by an amplitude factor and time delay assigned to respective transmitter elements. A set of amplitude factors and time delays can be assigned to the transmitter elements of the transmitter array such that the transmitter elements produce a focused acoustic beam at the desired zone-of-interest by combination of guided mode acoustic signals transmitted by the transmitter elements.

公开(公告)号：US12000973B2

公开(公告)日：2024-06-04

申请号：US17659913

申请日：2022-04-20

Applicant: Schlumberger Technology Corporation

Inventor： Sandip Bose ,  Ralph D'Angelo ,  Smaine Zeroug

IPC: G01V1/50

CPC classification number: G01V1/50 ,  G01V2210/74

Abstract: Aspects described herein provide for methods and apparatus for characterizing azimuthal heterogeneities in a barrier installed outside an outer casing in a borehole traversing a formation in a cased hole configuration including an inner and outer casing. The approach is based on specific attributes in sonic signals acquired with an azimuthal and axial array receiver system located inside the inner casing. The methods include slowness-time-coherence (STC) processing based on specific arrivals identified in data acquired by axial arrays associated with multiple azimuthal sections of the receiver system. The specific arrivals contain STC signatures that can be examined in terms of coherence amplitude and localization within STC maps. Based on specific attributes in the sonic signals, an azimuthal coverage of the outer casing annular contents can be created.