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Experiment for 3-component S-wave reflection survey. Part 3; Sanseibun S ha hanshaho no kiso jikken. 4

Abstract

Investigations and discussions were given by using P-S logging on anisotropy of refracted waves in the fundamental experiments conducted in the Matsuyama town, Yamagata Prefecture. In the investigations, S-wave was transmitted into two to three directions at four locations in total: one at the opening of a well with a depth of 100 m and three locations having offset of 50 m from the well opening, and anisotropy of direct waves in the depth direction was investigated. Data were recorded on the ground at the same time by using a 3-component receiver. As a result of the experiment, detection of the anisotropy by means of measurement inside the well was found more difficult than anticipated due to anomaly in the refracted waves, hence no clear velocity anisotropy has been observed. It appears that no azimuth anisotropy exists at depths shallower than at least 24 m. No anisotropy due to incident angles was made clear in the present experiment. Offset recording experienced poor S/N ratio, having made the data analysis difficult. The data for zero offset do not harmonize with the refracted wave analysis on the data derived by using the reflection method, whose cause requires further discussions. 4 figs., 2  More>>
Authors:
Kano, N; Kiguchi, T; Yamaguchi, K; [1]  Yokota, T [2] 
  1. Geological Survey of Japan, Tsukuba (Japan)
  2. Japan National Oil Corp., Tokyo (Japan). Technology Research Center
Publication Date:
Oct 22, 1997
Product Type:
Conference
Report Number:
ETDE/JP-98751022; CONF-9710214-
Reference Number:
SCA: 440700; 580000; PA: JP-97:0G4513; EDB-98:075718; SN: 98001944449
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:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 58 GEOSCIENCES; SEISMIC SURVEYS; REFLECTION; SEISMIC S WAVES; REFRACTION; ANISOTROPY; BOREHOLES; DEPTH; WELL LOGGING; DATA ACQUISITION; SIGNAL-TO-NOISE RATIO
OSTI ID:
622632
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE98751022; TRN: JN97G4513
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. 9-13
Announcement Date:

Citation Formats

Kano, N, Kiguchi, T, Yamaguchi, K, and Yokota, T. Experiment for 3-component S-wave reflection survey. Part 3; Sanseibun S ha hanshaho no kiso jikken. 4. Japan: N. p., 1997. Web.
Kano, N, Kiguchi, T, Yamaguchi, K, & Yokota, T. Experiment for 3-component S-wave reflection survey. Part 3; Sanseibun S ha hanshaho no kiso jikken. 4. Japan.
Kano, N, Kiguchi, T, Yamaguchi, K, and Yokota, T. 1997. "Experiment for 3-component S-wave reflection survey. Part 3; Sanseibun S ha hanshaho no kiso jikken. 4." Japan.
@misc{etde_622632,
title = {Experiment for 3-component S-wave reflection survey. Part 3; Sanseibun S ha hanshaho no kiso jikken. 4}
author = {Kano, N, Kiguchi, T, Yamaguchi, K, and Yokota, T}
abstractNote = {Investigations and discussions were given by using P-S logging on anisotropy of refracted waves in the fundamental experiments conducted in the Matsuyama town, Yamagata Prefecture. In the investigations, S-wave was transmitted into two to three directions at four locations in total: one at the opening of a well with a depth of 100 m and three locations having offset of 50 m from the well opening, and anisotropy of direct waves in the depth direction was investigated. Data were recorded on the ground at the same time by using a 3-component receiver. As a result of the experiment, detection of the anisotropy by means of measurement inside the well was found more difficult than anticipated due to anomaly in the refracted waves, hence no clear velocity anisotropy has been observed. It appears that no azimuth anisotropy exists at depths shallower than at least 24 m. No anisotropy due to incident angles was made clear in the present experiment. Offset recording experienced poor S/N ratio, having made the data analysis difficult. The data for zero offset do not harmonize with the refracted wave analysis on the data derived by using the reflection method, whose cause requires further discussions. 4 figs., 2 tabs.}
place = {Japan}
year = {1997}
month = {Oct}
}