IDENTIFICATION OF STRUCTURES WITHIN THE DEEP GEOTHERMAL RESERVOIR OF THE KAKKONDA FIELD, JAPAN, BY A REFLECTION METHOD USING ACOUSTIC-EMISSION AS A WAVE SOURCE

Authors
Citation
N. Soma et H. Niitsuma, IDENTIFICATION OF STRUCTURES WITHIN THE DEEP GEOTHERMAL RESERVOIR OF THE KAKKONDA FIELD, JAPAN, BY A REFLECTION METHOD USING ACOUSTIC-EMISSION AS A WAVE SOURCE, Geothermics, 26(1), 1997, pp. 43-64
Citations number
19
Categorie Soggetti
Geosciences, Interdisciplinary","Energy & Fuels
Journal title
ISSN journal
03756505
Volume
26
Issue
1
Year of publication
1997
Pages
43 - 64
Database
ISI
SICI code
0375-6505(1997)26:1<43:IOSWTD>2.0.ZU;2-2
Abstract
Structures within the deep geothermal reservoir in the Kakkonda field have been identified by a newly-developed reflection method using acou stic emission (AE) as a wave source. Reflected waves in three-componen t AE signals were detected independently of the wave amplitude by exam ining the linearity of a three-dimensional hodogram. There are many po ssible reflectors in this field, such as geological boundaries and fra ctured regions. In this paper are described some deep reflectors benea th the conventionally developed shallow geothermal reservoirs that wer e revealed by three-dimensional inversion of natural AE waveforms. The se identified reflectors agree fairly well with geological constraints based on core samples from the field. (C) 1997 CNR.