Evaluation of geothermal reservoir cracks by shear-wave splitting of acoustic emission

M. Sato, N. Matsumoto, H. Niitsuma

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Shear-wave splitting of acoustic emissions (AE) was analyzed to obtain a description and evaluation of subsurface cracks in a natural geothermal reservoir. During shutdown operations of production wells in 1984-1986 at the Kakkonda (Takinoue) geothermal power plant, Japan, several thousand AE events were located with a downhole tri-axial AE sonde. A total of 145 of these events showed shear-wave splitting and they were used to estimate depth and crack density of multiple layers in the reservoir. The shear-wave polarization was used to determine the orientation of the cracks, and crack density was calculated from delays between shear-wave polarization-anomalies. The reservoir was divided into three zones based on observed characteristics of the shear wave splitting. These zones are identified as the injection, production and intermediate zones.

本文言語English
ページ(範囲)197-206
ページ数10
ジャーナルGeothermics
20
4
DOI
出版ステータスPublished - 1991

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • 地盤工学および土木地質学
  • 地質学

フィンガープリント

「Evaluation of geothermal reservoir cracks by shear-wave splitting of acoustic emission」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル