Acoustic emission analysis of a geothermal reservoir and its application to reservoir control
Journal Article
·
· Geothermics; (United States)
A detailed analysis has been made of acoustic emissions detected during build-up tests in a geothermal production well in Kakkonda geothermal power plant, Japan, in 1982, 1984, and 1985. The three-dimensional structure of the hydrothermal reservoir in the field and its dynamic behavior have been investigated. The shape and location of the cracked reservoir, the fluid paths and degree of communication between the reservoir and the geothermal wells, have been revealed by this analysis. The dependence of AE (acoustic emission) activity on valve operations has also been studied. The stability of crack-like reservoirs depends on the reduction in flow-rate in the reservoir system, the closing rate of the wellhead valve and on intervals between the tests. Reservoir stability has been successfully achieved during the 1985 test by valve regulation, according to the results of the AE study.
- Research Organization:
- Faculty of Engineering, Tohoku Univ., Sendai 980
- OSTI ID:
- 6060575
- Journal Information:
- Geothermics; (United States), Journal Name: Geothermics; (United States) Vol. 16:1; ISSN GTMCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
15 GEOTHERMAL ENERGY
150301 -- Geothermal Exploration & Exploration Technology-- Geophysical Techniques & Surveys
150904* -- Geothermal Engineering-- Geothermal Reservoir & Well Performance
ACOUSTIC EMISSION TESTING
ACOUSTIC MEASUREMENTS
ACOUSTIC TESTING
ASIA
CONTROL EQUIPMENT
CRACK PROPAGATION
ENERGY SYSTEMS
EQUIPMENT
FLOW RATE
FLOW REGULATORS
FRACTURED RESERVOIRS
GEOTHERMAL FIELDS
GEOTHERMAL POWER PLANTS
GEOTHERMAL SYSTEMS
GEOTHERMAL WELLS
HYDROTHERMAL SYSTEMS
JAPAN
KAKKONDA GEOTHERMAL FIELD
MATERIALS TESTING
NONDESTRUCTIVE TESTING
POWER PLANTS
SHAPE
STABILITY
TESTING
THERMAL POWER PLANTS
THREE-DIMENSIONAL CALCULATIONS
VALVES
WELLHEADS
WELLS
150301 -- Geothermal Exploration & Exploration Technology-- Geophysical Techniques & Surveys
150904* -- Geothermal Engineering-- Geothermal Reservoir & Well Performance
ACOUSTIC EMISSION TESTING
ACOUSTIC MEASUREMENTS
ACOUSTIC TESTING
ASIA
CONTROL EQUIPMENT
CRACK PROPAGATION
ENERGY SYSTEMS
EQUIPMENT
FLOW RATE
FLOW REGULATORS
FRACTURED RESERVOIRS
GEOTHERMAL FIELDS
GEOTHERMAL POWER PLANTS
GEOTHERMAL SYSTEMS
GEOTHERMAL WELLS
HYDROTHERMAL SYSTEMS
JAPAN
KAKKONDA GEOTHERMAL FIELD
MATERIALS TESTING
NONDESTRUCTIVE TESTING
POWER PLANTS
SHAPE
STABILITY
TESTING
THERMAL POWER PLANTS
THREE-DIMENSIONAL CALCULATIONS
VALVES
WELLHEADS
WELLS