eprintid: 1781
rev_number: 12
eprint_status: archive
userid: 6
dir: disk0/00/00/17/81
datestamp: 2016-12-20 13:05:01
lastmod: 2017-02-08 12:22:23
status_changed: 2016-12-20 13:05:01
type: book_section
metadata_visibility: show
creators_name: Kaieda, Hideshi
creators_name: Sasaki, Shunji
creators_name: Wyborn, D.
corp_creators: 1646, Abiko, Abiko-shi, Chiba, 270-1194, Japan
corp_creators: 1-5-18, Sarugaku-cho, Chiyoda-ku, Tokyo, 101-0064, Japan
corp_creators: Level 2, 23A Graham Street Milton Qld 4064, Australia
title: Comparison of Characteristics of Micro-Earthquakes Observed During Hydraulic Stimulation Operations in Ogachi, Hijiori and Cooper Basin HDR Projects
subjects: MP2
subjects: RA1
subjects: SG
divisions: SHEER-6
full_text_status: none
keywords: HDR, Micro-earthquake, Hydraulic stimulation,
Reservoir, Ogachi, Cooper Basin
note: Congress held April 25-30, 2010, in Bali, Indonesia
abstract: In Hot Dry Rock (HDR) or Hot Fractured Rock (HFR)
geothermal energy development, micro-earthquake events
were observed to evaluate the location and size of fracture
distribution of artificially created reservoirs during hydraulic
stimulation operations. Many micro-earthquake events were
observed during hydraulic stimulation operations from
depths of around 1,000 m to 4,200 m at three different sites:
Ogachi and Hijiori in Japan and Cooper Basin in Australia.
Comparison of the water injection operations to observed
micro-earthquake hypocenter locations and the rate of events
led to the observation of some differences and similarities.
Seismic activities at the beginning of the water injection
phase were low in Ogachi and Hijiori until the injected
water volume reached that which was injected in a previous
test, but high activity was observed from the onset of
injection at the Cooper Basin site. This difference is thought
to be caused by the injected water recovery from the
fractures.
It was seen in Cooper Basin that the previously activated
area was quiet in the successive stimulation operations. This
is thought to be caused by stress release from previous water
injection.
The water volume injected and the seismically activated area
showed linear correlation. However, the inclination of the
relationship is different and depends on the site. The
seismically activated region at Cooper Basin extended much
further than other sites. These differences are thought to be
strongly dependent on regional natural joint systems.
date: 2010
date_type: published
publisher: International Geothermal Assocation
book_title: World Geothermal Congress 2010
official_url: https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=8006703
access_IS-EPOS: limited
owner: Publisher
citation:   Kaieda, Hideshi and Sasaki, Shunji and Wyborn, D.  (2010) Comparison of Characteristics of Micro-Earthquakes Observed During Hydraulic Stimulation Operations in Ogachi, Hijiori and Cooper Basin HDR Projects.   In:  World Geothermal Congress 2010.   International Geothermal Assocation.