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1. WO2013137974 - DIRECT ARRIVAL SIGNATURE ESTIMATES

Publication Number WO/2013/137974
Publication Date 19.09.2013
International Application No. PCT/US2013/021189
International Filing Date 11.01.2013
Chapter 2 Demand Filed 22.07.2013
IPC
G01V 1/38 2006.01
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
1Seismology; Seismic or acoustic prospecting or detecting
38specially adapted for water-covered areas
G01V 1/30 2006.01
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
1Seismology; Seismic or acoustic prospecting or detecting
28Processing seismic data, e.g. analysis, for interpretation, for correction
30Analysis
CPC
G01V 1/288
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
1Seismology; Seismic or acoustic prospecting or detecting
28Processing seismic data, e.g. analysis, for interpretation, for correction
288Event detection in seismic signals, e.g. microseismics
G01V 1/36
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
1Seismology; Seismic or acoustic prospecting or detecting
28Processing seismic data, e.g. analysis, for interpretation, for correction
36Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy
G01V 1/38
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
1Seismology; Seismic or acoustic prospecting or detecting
38specially adapted for water-covered areas
G01V 2210/56
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
2210Details of seismic processing or analysis
50Corrections or adjustments related to wave propagation
56De-ghosting; Reverberation compensation
Applicants
  • EXXONMOBIL UPSTREAM RESEARCH COMPANY [US]/[US] (AllExceptUS)
  • NORRIS, Michael, W. [US]/[US] (US)
  • REILLY, Joseph, M. [US]/[US] (US)
Inventors
  • NORRIS, Michael, W.
  • REILLY, Joseph, M.
Agents
  • PLUMMER, Paul, J.
Priority Data
61/609,59612.03.2012US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DIRECT ARRIVAL SIGNATURE ESTIMATES
(FR) ESTIMATIONS DE SIGNATURES D'ARRIVÉES DIRECTES
Abstract
(EN)
Method for estimating source signature of a marine seismic source array in a naturally band-limited subsurface region, for designature processing of resulting seismic data. Direct arrivals identified in the streamer receivers' records (131) provide a far-field estimate of the source signature, provided that the subsurface naturally limits frequencies to below the first notch frequency in the amplitude response of the seismic streamer receiver array. Processing of the direct arrivals may include move out or alignment correction (132), signal enhancement (133), summing of direct arrival traces over all offsets (134), windowing or tapering of direct arrivals (135), and deterministic corrections to the combined direct arrivals to compensate for ghosting and streamer array effects (136).
(FR)
Procédé permettant d'estimer la signature de source d'un groupe de sources sismiques marines dans une région de sous- surface à bande naturellement limitée, pour le traitement de signature des données sismiques obtenues. Des arrivées directes identifiées dans les enregistrements (131) des récepteurs de flûte sismique fournissent une estimation de champ lointain de la signature de la source, à condition que la sous-surface limite naturellement les fréquences à au-dessous de la première fréquence de rejet dans la réponse en amplitude du réseau récepteur d'une flûte marine sismique. Le traitement des arrivées directes peut comprendre une correction (132) d'alignement ou de déplacement, une amélioration de signal (133), une sommation de traces d'arrivée directe sur tous les décalages (134), un fenêtrage ou un rétrécissement des arrivées directes (135), et des corrections déterministes sur les arrivées directes combinées pour compenser les effets des images fantômes et du réseau de flûtes (136).
Also published as
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