# US 10,310,120 B2 · Noise mitigation in seismic multimeasurement data > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,310,120 B2 - Document ID: US10310120B2 - Status: Granted - Kind: B2 - Application number: 14/697,184 - Filed: 2015-04-27 - Published: 2016-10-27 - Granted: 2019-06-04 - Earliest claimed: 2015-04-27 - Assignees: Schlumberger Technology Corporation - Applicants: Schlumberger Technology Corporation - Inventors: Yousif Izzeldin Kamil Amin; Massimiliano Vassallo - Web page: https://patentgrep.com/patent/US10310120B2 ## CPC - G01V 1/364: {Seismic filtering (G01V1/37 takes precedence)} - G01V 1/38: specially adapted for water-covered areas (G01V1/28 takes precedence) - G01V 2210/144: with functionally associated receivers, e.g. hydrophone and geophone pairs - G01V 2210/324: Filtering - G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02) ## Abstract Computing systems, methods, and computer-readable media for noise mitigation in seismic multimeasurement data are disclosed. In some embodiments, a computer-implemented method for noise mitigation of seismic wavefield data measured by a seismic streamer is provided, where the method utilizes correlation between multiple components of the seismic wavefield data, and where the method includes adjusting a magnitude of measured inline particle motion of the seismic wavefield to not exceed a computed upper bound power spectral density of an inline component of the seismic wavefield, adjusting a magnitude of measured crossline particle motion of the seismic wavefield to not exceed a computed upper bound power spectral density of a crossline component of the seismic wavefield, adjusting a magnitude of measured vertical particle motion of the seismic wavefield to not exceed a computed upper bound power spectral density of a vertical component of the seismic wavefield, and outputting data representing the seismic wavefield. ## Claims ### Claim 1 A computer-implemented method for noise mitigation of seismic wavefield data measured by a multi-sensor seismic streamer towed by a marine vehicle, the method utilizing correlation between multiple components of the seismic wavefield data, the method comprising: adjusting, by at least one electronic programmed processor, a magnitude of inline particle motion of a seismic wavefield measured by the multi-sensor seismic streamer towed by the marine vehicle to not exceed a computed upper bound power spectral density of an inline component of the seismic wavefield; adjusting, by at least one electronic programmed processor, a magnitude of measured crossline particle motion of the seismic wavefield to not exceed a computed upper bound power spectral density of a crossline component of the seismic wavefield; adjusting, by at least one electronic programmed processor, a magnitude of measured vertical particle motion of the seismic wavefield to not exceed a computed upper bound power spectral density of a vertical component of the seismic wavefield; and outputting, by at least one electronic programmed processor, data representing the seismic wavefield. ### Claim 2 (depends on 1) The method of claim 1, wherein the computed upper bound power spectral density of an inline component of the seismic wavefield comprises a product comprising an inline wavenumber and a magnitude of the wavefield. ### Claim 3 (depends on 2) The method of claim 2, wherein the inline wavenumber comprises a product of a trigonometric function of and incidence angle and a trigonometric function of an azimuth angle. ### Claim 4 (depends on 1) The method of claim 1, wherein the computed upper bound power spectral density of a crossline component of the seismic wavefield comprises a product comprising a crossline wavenumber and a magnitude of the wavefield. ### Claim 5 (depends on 4) The method of claim 4, wherein the crossline wavenumber comprises a maximal feasible crossline wavenumber. ### Claim 6 (depends on 1) The method of claim 1, wherein the computed upper bound power spectral density of a vertical component of the seismic wavefield comprises a magnitude of a ghost operator. ### Claim 7 (depends on 6) The method of claim 6, wherein the computed upper bound power spectral density of a vertical component of the seismic wavefield further comprises an estimated upgoing wavefield. ### Claim 8 (depends on 1) The method of claim 1, wherein: the measured inline particle motion of the seismic wavefield comprises measured inline particle acceleration of the seismic wavefield; the measured crossline particle motion of the seismic wavefield comprises measured crossline particle acceleration of the seismic wavefield; and the measured vertical particle motion of the seismic wavefield comprises measured vertical particle acceleration of the seismic wavefield. ### Claim 9 (depends on 1) The method of claim 1, wherein: the adjusting a magnitude of measured inline particle motion of the seismic wavefield is performed by a zero phase nonlinear filter; the adjusting a magnitude of measured crossline particle motion of the seismic wavefield is performed by a zero phase nonlinear filter; and the adjusting a magnitude of measured vertical particle motion of the seismic wavefield is performed by a zero phase nonlinear filter. ### Claim 10 (depends on 1) The method of claim 1, wherein the outputting comprises causing a graphical display of the wavefield data. ### Claim 11 A computing system, comprising: one or more processors; and a memory system comprising one or more computer-readable media storing instructions thereon that, when executed by the one or more processors, are configured to cause the computing system to perform operations, the operations comprising: adjusting a magnitude of inline particle motion of a seismic wavefield measured by a multi-sensor seismic streamer towed by a marine vehicle to not exceed a computed upper bound power spectral density of an inline component of the seismic wavefield; adjusting a magnitude of crossline particle motion of the seismic wavefield to not exceed a computed upper bound power spectral density of a crossline component of the seismic wavefield; adjusting a magnitude of vertical particle motion of the seismic wavefield to not exceed a computed upper bound power spectral density of a vertical component of the seismic wavefield; and outputting data representing the seismic wavefield. ### Claim 12 (depends on 11) The system of claim 11, wherein the computed upper bound power spectral density of an inline component of the seismic wavefield comprises a product comprising an inline wavenumber and a magnitude of the wavefield. ### Claim 13 (depends on 11) The system of claim 11, wherein the inline wavenumber comprises a product of a trigonometric function of and incidence angle and a trigonometric function of an azimuth angle. ### Claim 14 (depends on 11) The system of claim 11, wherein the computed upper bound power spectral density of a crossline component of the seismic wavefield comprises a product comprising a crossline wavenumber and a magnitude of the wavefield. ### Claim 15 (depends on 14) The system of claim 14, wherein the crossline wavenumber comprises a maximal feasible crossline wavenumber. ### Claim 16 (depends on 11) The system of claim 11, wherein the computed upper bound power spectral density of a vertical component of the seismic wavefield comprises a magnitude of a ghost operator. ### Claim 17 (depends on 16) The system of claim 16, wherein the computed upper bound power spectral density of a vertical component of the seismic wavefield further comprises an estimated upgoing wavefield. ### Claim 18 (depends on 11) The system of claim 11, wherein: the measured inline particle motion of the seismic wavefield comprises measured inline particle acceleration of the seismic wavefield; the measured crossline particle motion of the seismic wavefield comprises measured crossline particle acceleration of the seismic wavefield; and the measured vertical particle motion of the seismic wavefield comprises measured vertical particle acceleration of the seismic wavefield. ### Claim 19 (depends on 11) The system of claim 11, further comprising: a zero phase nonlinear filter configured to perform the adjusting a magnitude of measured inline particle motion of the seismic wavefield; a zero phase nonlinear filter configured to perform the adjusting a magnitude of measured crossline particle motion of the seismic wavefield; and a zero phase nonlinear filter configured to perform the adjusting a magnitude of measured vertical particle motion of the seismic wavefield. ### Claim 20 (depends on 11) The system of claim 11, wherein the outputting comprises causing a graphical display of the wavefield data.