公开(公告)号：US20220113438A1

公开(公告)日：2022-04-14

申请号：US17067173

申请日：2020-10-09

Applicant: SERCEL

Inventor： Viktor SMIRNOV ,  Julien RIBETTE

IPC: G01V1/20 ,  G01V1/38

Abstract: A method for calculating a velocity vp(f, Topt) of a spatially aliased wave that propagates along a cable includes tensioning the cable, wherein plural sensors are distributed along the cable; measuring with the plural sensors a parameter that is associated with vibrations that propagate along the cable; calculating a phase velocity vp(f) of the spatially aliased wave that propagates along the cable, as a function of a time frequency fin a spatial-temporal frequency domain FK; calculating a model-based velocity vp(f, T) of the spatially aliased wave as a function of the time frequency f and a tension T in the cable; and calculating the velocity vp(f, Topt) of the spatially aliased wave using a model-guided regression, which is based on the phase velocity vp(f) and the model-based velocity vp(f, T). The velocity vp(f, Topt) is a function of the temporal frequency f.

公开(公告)号：US20250155593A1

公开(公告)日：2025-05-15

申请号：US18505240

申请日：2023-11-09

Applicant: SERCEL

Inventor： Viktor SMIRNOV ,  Thibaut CAPPE DE BAILLON

IPC: G01V1/18 ,  G01V1/38

Abstract: A method for determining the health of an individual sensor, within a plurality of individual sensors that are wired together to form a receiver point. The method includes receiving positions of the plurality of individual sensors along the cable, recording the trace associated with measured plural signals from the plurality of individual sensors, as an external device moves along the cable, past the individual sensor, and determining a health status of the individual sensor of the plurality of individual sensors by identifying a signature SI of the individual sensor in the recorded trace. The external device emits a noise when moving along the cable, and the noise is detectable only by the individual sensor of the receiver point when the external device is located over the individual sensor.

公开(公告)号：US20230221454A1

公开(公告)日：2023-07-13

申请号：US17573801

申请日：2022-01-12

Applicant: SERCEL

Inventor： Viktor SMIRNOV ,  Clémence BERTHONAUD ,  Julien RIBETTE

IPC: G01V1/38 ,  G01V1/18 ,  G01V1/28

CPC classification number: G01V1/3843 ,  G01V1/186 ,  G01V1/28 ,  G01V2210/1423

Abstract: A method for verticalizing recorded seismic data, the method including recording first data with a particle motion sensor, wherein the particle motion sensor is located on a streamer, and the particle motion sensor is configured to be insensitive to a direct current, recording second data with a gravity motion sensor, wherein the gravity motion sensor is also located on the stream, and the gravity motion sensor is configured to be sensitive to the direct current and temporally synchronous to the particle motion sensor, selecting a cost function that associates corresponding values of the first data and the second data, determining a misalignment angle from maximizing the cost function, wherein the misalignment angle describes a misalignment between corresponding axes of the particle motion sensor and the gravity motion sensor, and correcting seismic data recorded by the particle motion sensor based on the misalignment angle so that the corrected seismic data is verticalized with regard to gravity.