Temporal Changes in Physico-Chemical Parameters of Fluids During a Production Test at Momotombo, Nicaragua
- Key words
- Exploration; Nicaragua; Momotombo; Volcanics; Fractures; Temperatures; Pressure; Chemical Analysis; Silica; Wellhead; Physico-Chemical Analysis
- Location
- Momotombo, Nicaragua
- Conference
- Geothermal Resources Council Transactions
- Year
- 1982
- Session
- Brine chemistry; Well testing; Flow testing
- Language
- English
Abstract
Evolution of physio-chemical characteristics of the fluids discharged during a monitored six month production test at Momotombo points to rapid transformation of the reservoir from water to steam dominated. The transformation followed an invasion of the peripheries of the hot reservoir by cold groundwater from the pyroclastic and lacustrine formations underneath Lake Managua. Rapid cooling of the periphery of the geothermal reservoir led to intraformational precipitation of silica, sealing off the reservoir to any fresh recharge. The process was reflected in raditical changes in pressure, temperatures and production rates, accompanied by significant evolution of chemical parameters of the discharged fluids, such as B/C1, Na/K and Na/C1 ratios an concentration of silica, chloride, sulfate and boron.
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