公开(公告)号：US11802986B2

公开(公告)日：2023-10-31

申请号：US16892557

申请日：2020-06-04

Applicant: PGS Geophysical AS

Inventor： Manuel Beitz ,  Martin Widmaier ,  Andrew Long

IPC: G01V1/38

CPC classification number: G01V1/3852 ,  G01V1/3808 ,  G01V2210/1293 ,  G01V2210/165

Abstract: Methods for performing a marine survey of a subterranean formation using a hybrid combination of ocean bottom seismic (“OBS”) receivers, wide towed sources, and moving streamers are described herein. In one aspect, a sail line separation in a crossline direction is determined based on an average streamer separation and number of streamers. An array of OBS receivers are deposited on a surface of a subterranean formation with an OBS receiver separation that is based on the sail line separation. Wide towed sources and streamers are towed above the array of OBS receivers behind a survey vessel that travels sail lines separated by the sail line separation. The wide towed sources may be activated above the array of OBS receivers. Wavefields reflected from the subterranean formation are recorded at the OBS receivers and receivers located in the streamers as seismic data.

公开(公告)号：US09841521B2

公开(公告)日：2017-12-12

申请号：US15055223

申请日：2016-02-26

Applicant: PGS Geophysical AS

Inventor： Martin Widmaier ,  Anthony J. Day ,  Neil H. R. Turnbull

IPC: G01V1/38

CPC classification number: G01V1/3817 ,  G01V1/3808 ,  G01V2210/32 ,  G01V2210/34 ,  G01V2210/56

Abstract: Variable depth multicomponent sensor streamer. At least some of example embodiments including perform a geophysical survey by: setting a first target depth for first depth positioning device of a sensor streamer, the first depth positioning device associated with a first sensor of the sensor streamer, the first sensor at a first offset, and the first target depth based on tension in the sensor streamer proximate the first sensor; setting a second target depth for a second depth positioning device of the sensor streamer, the second depth positioning device associated with a second sensor of the sensor streamer, the second sensor at a second offset greater than the first offset, the second target depth based on tension in the sensor streamer proximate the second sensor, and the second target depth greater than the first target depth; towing the sensor streamer through the water; and obtaining data from the sensors.

公开(公告)号：US20240134079A1

公开(公告)日：2024-04-25

申请号：US18377237

申请日：2023-10-04

Applicant: PGS Geophysical AS

Inventor： Martin Widmaier ,  Ashish Misra ,  Manuel Beitz

IPC: G01V1/38 ,  G01V1/28 ,  G01V1/30 ,  G01V1/34

CPC classification number: G01V1/3843 ,  G01V1/282 ,  G01V1/303 ,  G01V1/345

Abstract: A marine seismic survey comprises towing a first source and a first streamer spread having a length L behind a first vessel. Sensors in the streamer spread record signals from the first source over a range of offset distances X to X+L. A second source is towed behind a second vessel that does not tow a streamer spread. Sensors in the streamer spread record signals from the second source over a range of offset distances A+L to A+2L. Sensors in the streamer spread do not record signals over a range of offset distances X+L to A+L from any active seismic sources used in the marine seismic survey.

公开(公告)号：US20240230941A9

公开(公告)日：2024-07-11

申请号：US18377237

申请日：2023-10-05

Applicant: PGS Geophysical AS

Inventor： Martin Widmaier ,  Ashish Misra ,  Manuel Beitz

IPC: G01V1/38 ,  G01V1/28 ,  G01V1/30 ,  G01V1/34

CPC classification number: G01V1/3843 ,  G01V1/282 ,  G01V1/303 ,  G01V1/345

Abstract: A marine seismic survey comprises towing a first source and a first streamer spread having a length L behind a first vessel. Sensors in the streamer spread record signals from the first source over a range of offset distances X to X+L. A second source is towed behind a second vessel that does not tow a streamer spread. Sensors in the streamer spread record signals from the second source over a range of offset distances A+L to A+2L. Sensors in the streamer spread do not record signals over a range of offset distances X+L to A+L from any active seismic sources used in the marine seismic survey.

公开(公告)号：US20250130342A1

公开(公告)日：2025-04-24

申请号：US18917771

申请日：2024-10-16

Applicant: PGS Geophysical AS

Inventor： Okwudili Orji ,  Julien Oukili ,  Martin Widmaier

IPC: G01V1/38 ,  G01V1/137

Abstract: In survey configurations for towed streamer shallow target investigations, seismic sources are placed in one or more of several zones disposed at different inline offsets relative to the streamers. In some embodiments, a vessel tows a set of one or more streamers along with a set of one or more sources disposed aft of the tail end of the streamers. In other embodiments, a vessel tows a set of one or more streamers, a set of one or more near offset sources disposed forward of the front end of the streamers, and a set of one or more far offset sources disposed forward of the near offset sources.

公开(公告)号：US12105239B2

公开(公告)日：2024-10-01

申请号：US17463784

申请日：2021-09-01

Applicant: PGS Geophysical AS

Inventor： Christian Strand ,  Martin Widmaier ,  Carine Roalkvam

IPC: G01V1/38 ,  G01V1/30

CPC classification number: G01V1/3808 ,  G01V1/30 ,  G01V1/38 ,  G01V1/3843 ,  G01V2210/1293 ,  G01V2210/1423

Abstract: A method and apparatus for marine surveying includes: towing sources in a wide-tow source geometry; towing streamers that comprise receivers; actuating at least one of the sources to create a signal; and detecting the signal with a first receiver, wherein: at least one of the source separations or the streamer separations is non-uniform, and the sources and the receivers provide a regular sampling grid for the survey area. A system includes a survey plan; sources in a wide-tow source geometry; and streamers comprising receivers, wherein: at least one of the source separations or the streamer separations is non-uniform, and the sail lines, sources, and receivers provide uniform CMP coverage for the survey area. A method includes operating a system in a survey area, the system having a non-uniform configuration with wide-tow source geometry; actuating at least one source to create a signal; and detecting the signal with a first receiver.

公开(公告)号：US20240012169A1

公开(公告)日：2024-01-11

申请号：US18371040

申请日：2023-09-21

Applicant: PGS Geophysical AS

Inventor： Manuel Beitz ,  Martin Widmaier ,  Andrew Long

IPC: G01V1/38

CPC classification number: G01V1/3852 ,  G01V1/3808 ,  G01V2210/1293 ,  G01V2210/165

Abstract: Methods for performing a marine survey of a subterranean formation using a hybrid combination of ocean bottom seismic (“OBS”) receivers, wide towed sources, and moving streamers are described herein. In one aspect, a sail line separation in a crossline direction is determined based on an average streamer separation and number of streamers. An array of OBS receivers are deposited on a surface of a subterranean formation with an OBS receiver separation that is based on the sail line separation. Wide towed sources and streamers are towed above the array of OBS receivers behind a survey vessel that travels sail lines separated by the sail line separation. The wide towed sources may be activated above the array of OBS receivers. Wavefields reflected from the subterranean formation are recorded at the OBS receivers and receivers located in the streamers as seismic data.

公开(公告)号：US09678235B2

公开(公告)日：2017-06-13

申请号：US14107823

申请日：2013-12-16

Applicant: PGS Geophysical AS

Inventor： Martin Widmaier ,  Anthony J. Day ,  Neil H. R. Turnbull

IPC: G01V1/38

CPC classification number: G01V1/3817 ,  G01V1/3808 ,  G01V2210/32 ,  G01V2210/34 ,  G01V2210/56

Abstract: Variable depth multicomponent sensor streamer. At least some of example embodiments are methods including designing a depth profile for first portion of a sensor streamer by determining a first target depth for a first hydrophone-geophone pair, the first hydrophone-geophone pair at a first offset along the sensor streamer, the determining based on a first projected geophone noise floor at the first offset and a first expected spectral notch of a hydrophone of the first hydrophone-geophone pair; and determining a second target depth for a second hydrophone-geophone pair, the second hydrophone-geophone pair at a second offset along the sensor streamer, the second offset greater than the first offset, and determining the second target depth based on a second projected geophone noise floor in the sensor streamer at the second offset and a second expected spectral notch of a hydrophone of the second hydrophone-geophone pair; wherein the second target depth is greater than the first target depth.