Microseismic Monitoring During Production and Reinjection Tests in the Chipilapa Geothermal Field (El Salvador)
- Key words
- Exploration; El Salvador; Chipilapa; Injection; Reinjection; Earthquakes; Microearthquakes; Hypocenters; Tectonics; Fumaroles
- Location
- Chipilapa, El Salvador
- Conference
- Geothermal Resources Council Transactions
- Year
- 1992
- Session
- Microseismicity; Well testing; Injection testing; Flow testi
- Language
- English
Abstract
The microseismic monitoring of the Chipliapa geothermal field has investigated the microseismic activity prior to and during the production and injection tests of three wells drilled between 1989 and 1991. Two surveys were carried out, in 1988 and 1991-1992 respectively, in order to study the reservoir and its recharge and to monitor microseismicity induced by reinjection. Natural microseismicity is distributed around the known geothermal area, and related either to tectonic activity under the volcanic range sites at the south (and which is the up flow zone of the geothermal field) or to the Central Graben at the north. No evidences of induced microseismicity appeared at this stage of interpretation, probably due to the unfavorable conditions prevailing during the tests; namely reinjection by gravity and low productivity.
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