By mc solar (December 12, 2009)

The Geysers program of deep rock drilling and fracturing for access to geothermal heat sources took a hit today when AltaRock let the federal government know they would no longer be pursuing the california Geysers project:

In fact, AltaRock immediately ran into snags with its drilling, repeatedly snapping off bits in shallow formations called caprock. The project’s safety was also under review at the Energy Department after federal officials said the company had not been entirely forthcoming about the earthquakes produced in Basel in making the case for the Geysers project.

The results of that review have not yet been announced, but the type of geothermal energy explored in Basel and at the Geysers requires fracturing the bedrock then circulating water through the cracks to produce steam. By its nature, fracturing creates earthquakes, though most of them are small.

On Friday, the Energy Department, which has put some $440 million into its geothermal program this year alone, said that despite the latest developments, it remained confident of the technology’s long-term prospects. Many geothermal methods do not require drilling so deep or fracturing bedrock. [full nytimes article]

Although they will be continuing similar programs in Oregon, spokemen said.



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