A pilot project from a team of oil industry veterans could save one of California’s key clean energy resources from terminal decline. On Thursday, the Oklahoma City-based GreenFire Energy announced that they had restored new life to a defunct well in The Geysers, the world’s largest geothermal power station — and one that has been in a state of slow, decades-long collapse. … The reason for the decline: the ferocious pace at which conventional forms of geothermal energy can use up water. … GreenFire’s next-gen system, which sits atop a well that had also been largely abandoned for lack of pressure, takes an approach that produces power without losing water.