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Consideration of some difficulties in migration velocity analysis; Migration velocity analysis no shomondai ni kansuru kento

Abstract

Concerning migration velocity analysis in the seismic exploration method, two typical techniques, out of velocity analysis techniques using residual moveout in the CIP gather, are verified. Deregowski`s method uses pre-stacking deep-level migration records for velocity analysis to obtain velocities free of spatial inconsistency and not dependent on the velocity structure. This method is very like the conventional DMO velocity analysis method and is easy to understand intuitively. In this method, however, error is apt to be aggravated in the process of obtaining the depth-sector velocity from the time-RMS velocity. Al-Yahya`s method formulates the moveout residual in the CIP gather. This assumes horizontal stratification and a small residual velocity, however, and fails to guarantee convergence in the case of a steep structure or a grave model error. In the updating of the velocity model, in addition, it has to maintain required accuracy and, at the same time, incorporate smoothing to ensure not to deteriorate high convergence. 2 refs., 5 figs.
Authors:
Akama, K; [1]  Matsuoka, T [2] 
  1. Japan National Oil Corp., Tokyo (Japan). Technology Research Center
  2. Japan Petroleum Exploration Corp., Tokyo (Japan)
Publication Date:
Oct 22, 1997
Product Type:
Conference
Report Number:
ETDE/JP-98751022; CONF-9710214-
Reference Number:
SCA: 020200; 030200; 440700; PA: JP-97:0G4544; EDB-98:071665; SN: 98001944480
Resource Relation:
Conference: 97. SEGJ conference, Butsuri tansa gakkai dai 97 kai (1997 nendo shuki) gakujutsu koenkai, Sapporo (Japan), 22-24 Oct 1997; Other Information: PBD: 22 Oct 1997; Related Information: Is Part Of Proceeding of the 97th (Fall, Fiscal 1997) SEGJ Conference; PB: 371 p.; Butsuri tansa gakkai dai 97 kai (1997 nendo shuki) gakujutsu koenkai koen ronbunshu
Subject:
02 PETROLEUM; 03 NATURAL GAS; 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; SEISMIC SURVEYS; REFLECTION; VELOCITY; DATA ANALYSIS; CALCULATION METHODS; ERRORS; SUBSURFACE STRUCTURES; INCLINATION; MATHEMATICAL MODELS; CONVERGENCE
OSTI ID:
622711
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE98751022; TRN: JN97G4544
Availability:
Available from Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, (Japan); OSTI as DE98751022
Submitting Site:
NEDO
Size:
pp. 149-152
Announcement Date:

Citation Formats

Akama, K, and Matsuoka, T. Consideration of some difficulties in migration velocity analysis; Migration velocity analysis no shomondai ni kansuru kento. Japan: N. p., 1997. Web.
Akama, K, & Matsuoka, T. Consideration of some difficulties in migration velocity analysis; Migration velocity analysis no shomondai ni kansuru kento. Japan.
Akama, K, and Matsuoka, T. 1997. "Consideration of some difficulties in migration velocity analysis; Migration velocity analysis no shomondai ni kansuru kento." Japan.
@misc{etde_622711,
title = {Consideration of some difficulties in migration velocity analysis; Migration velocity analysis no shomondai ni kansuru kento}
author = {Akama, K, and Matsuoka, T}
abstractNote = {Concerning migration velocity analysis in the seismic exploration method, two typical techniques, out of velocity analysis techniques using residual moveout in the CIP gather, are verified. Deregowski`s method uses pre-stacking deep-level migration records for velocity analysis to obtain velocities free of spatial inconsistency and not dependent on the velocity structure. This method is very like the conventional DMO velocity analysis method and is easy to understand intuitively. In this method, however, error is apt to be aggravated in the process of obtaining the depth-sector velocity from the time-RMS velocity. Al-Yahya`s method formulates the moveout residual in the CIP gather. This assumes horizontal stratification and a small residual velocity, however, and fails to guarantee convergence in the case of a steep structure or a grave model error. In the updating of the velocity model, in addition, it has to maintain required accuracy and, at the same time, incorporate smoothing to ensure not to deteriorate high convergence. 2 refs., 5 figs.}
place = {Japan}
year = {1997}
month = {Oct}
}