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Two-dimensional inversion of MT (magnetotelluric) data; MT ho no nijigen inversion kaiseki

Abstract

A program has been developed to conduct inversion analysis of two-dimensional model using MT data, accurately. For the developed program, finite element method (FEM) was applied to the section of sequential analysis. A method in which Jacobian matrix is calculated only one first time and is inversely analyzed by fixing this during the repetition, and a method in which Jacobian matrix is corrected at each repetition of inversion analysis, were compared mutually. As a result of the numerical simulation, it was revealed that the Jacobian correction method provided more stable convergence for the simple 2D model, and that the calculation time is almost same as that of the Jacobian fixation method. To confirm the applicability of this program to actually measured data, results obtained from this program were compared with those from the Schlumberger method analysis by using MT data obtained in the Hatchobara geothermal area. Consequently, it was demonstrated that the both are well coincided mutually. 17 refs., 7 figs.
Authors:
Ito, S; Okuno, M; Ushijima, K; Mizunaga, H [1] 
  1. Kyushu University, Fukuoka (Japan). Faculty of Engineering
Publication Date:
May 27, 1997
Product Type:
Conference
Report Number:
CONF-9705167-
Reference Number:
SCA: 440700; 990200; 150301; PA: NEDO-97:912256; EDB-97:120357; SN: 97001846548
Resource Relation:
Conference: 96. SEGJ conference, Butsuri tansa gakkai dai 96 kai (1997 nendo shunki) gakujutsu koenkai, Tokyo (Japan), 27-29 May 1997; Other Information: PBD: 27 May 1997; Related Information: Is Part Of Proceeding of the 96th (spring, fiscal 1997) SEGJ Conference; PB: 502 p.; Butsuri tansa gakkai dai 96 kai (1997 nendo shunki) gakujutsu koenkai koen ronbunshu
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; 15 GEOTHERMAL ENERGY; MAGNETOTELLURIC SURVEYS; DATA ANALYSIS; TWO-DIMENSIONAL CALCULATIONS; COMPUTER CODES; PERFORMANCE; CONVERGENCE; NUMERICAL ANALYSIS; COMPUTER CALCULATIONS; GEOTHERMAL FIELDS
OSTI ID:
522657
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97770262; TRN: 97:912256
Availability:
Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97770262
Submitting Site:
NEDO
Size:
pp. 256-260
Announcement Date:

Citation Formats

Ito, S, Okuno, M, Ushijima, K, and Mizunaga, H. Two-dimensional inversion of MT (magnetotelluric) data; MT ho no nijigen inversion kaiseki. Japan: N. p., 1997. Web.
Ito, S, Okuno, M, Ushijima, K, & Mizunaga, H. Two-dimensional inversion of MT (magnetotelluric) data; MT ho no nijigen inversion kaiseki. Japan.
Ito, S, Okuno, M, Ushijima, K, and Mizunaga, H. 1997. "Two-dimensional inversion of MT (magnetotelluric) data; MT ho no nijigen inversion kaiseki." Japan.
@misc{etde_522657,
title = {Two-dimensional inversion of MT (magnetotelluric) data; MT ho no nijigen inversion kaiseki}
author = {Ito, S, Okuno, M, Ushijima, K, and Mizunaga, H}
abstractNote = {A program has been developed to conduct inversion analysis of two-dimensional model using MT data, accurately. For the developed program, finite element method (FEM) was applied to the section of sequential analysis. A method in which Jacobian matrix is calculated only one first time and is inversely analyzed by fixing this during the repetition, and a method in which Jacobian matrix is corrected at each repetition of inversion analysis, were compared mutually. As a result of the numerical simulation, it was revealed that the Jacobian correction method provided more stable convergence for the simple 2D model, and that the calculation time is almost same as that of the Jacobian fixation method. To confirm the applicability of this program to actually measured data, results obtained from this program were compared with those from the Schlumberger method analysis by using MT data obtained in the Hatchobara geothermal area. Consequently, it was demonstrated that the both are well coincided mutually. 17 refs., 7 figs.}
place = {Japan}
year = {1997}
month = {May}
}