Sierra Geothermal starts deep well at Silver Peak

In Canada, Sierra Geothermal Power Corp. said it has begun drilling of a core-slim-well at its Silver Peak project. The well, #38-11, will be drilled to a maximum depth of 7,000 feet, targets multiple zones of interest and is the first deep well test at the site. Well 38-11 is funded on a 50:50 cost share basis by the DOE’s Geothermal Technologies Program grant, awarded in 2009. Core samples are being collected to provide geological information on subsurface rock types, faults, and fractures. The primary objective is to test temperature and permeability in the subsurface. A secondary objective is to compare core drilling rates to conventional and coil-tube rig drilling rates.