Internal Technical Report, Management Plan for Fluid Supply and Injection System for the Raft River 5 MW(e) Pilot Power Plant

摘要

This report details a plan for developing a fluid supply system for the First 5 MW(e) Pilot Power Plant at Raft River. The pilot plant has been specifically designed to use the medium-temperature geothermal water so common throughout the West. EG and G Idaho, Inc., the Department of Energy Raft River Rural Electric Co-op, the US Geological Survey (USGS) and the State of Idaho have worked together to develop a facility that will use an organic liquid as the working fluid. Four wells have been drilled in the Raft River Valley, about ten miles South of Malta, in southern Idaho. The completed well system will consist of seven wells: two conventional injection wells, three production wells, and a standby reserve well of each type. The additional three wells are to be drilled in FY-1978, in order to complete a coordinated test program before the First Pilot Power Plant is ready for operation. The system has been designed to meet the test-loop pilot plant's basic requirement: a 2450 gpm supply of geothermal fluid, at a nominal temperature of 290 F and with salinity of less than 5000 ppm. Injection of cooled geothermal fluid into the Raft River reservoir will also require a network of monitor wells. The Idaho Department of Water Resources (IDWR), USGS, EG and G Idaho, and the Department of Energy will jointly select sites for two 1500-foot and five 500-foot monitoring wells. This plan considers the work required to complete construction of the fluid supply system and obtain a preliminary check of its performance capability; the plan will discuss project management, costs, schedules, drilling, testing, environmental monitoring, and safety.