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Oil companies go solar to tap hard-to-get supplies

Soaring oil prices are turning some energy companies into accidental environmentalists: They are building clean, solar-powered systems to pull crude out of their aging wells.

April 23, 2011 / 11:00 AM IST

Soaring oil prices are turning some energy companies into accidental environmentalists: They are building clean, solar-powered systems to pull crude out of their aging wells.

But this is no public relations move by big polluters seeking to green their images. Having spent heavily on energy-intensive technology to increase output from depleted fields, companies including Chevron Corp and Berry Petroleum Co are using solar power to lower the cost of creating steam that is injected into the wells to improve the flow of heavy oil.

Yes, in this instance going solar is actually going cheaper. While electricity generated by solar panels is more expensive than that created by fossil fuels, using the sun to heat water and create steam for so-called enhanced oil recovery costs less than natural gas, even at today's low prices.

Rising oil prices and a dearth of new areas for exploration have increased investment in EOR, which refers to techniques used to boost crude production from mature fields, usually by injecting steam or gas into the well. Up to 60% of a reservoir's original oil can be extracted with EOR, compared with 20% to 40% using primary and secondary methods, according to the US Department of Energy.

About 60 percent of the oil produced in California is the result of some form of injection, according to the state Division of Oil, Gas & Geothermal Resources.

GlassPoint Solar Inc operates the only commercial solar EOR project, at a Berry oilfield in McKittrick, California.

The company said its technology generated steam at the equivalent of about $4 per thousand cubic feet -- about even with today's gas prices. Including U.S. incentives for solar power, however, that drops to about USD 2.80 per Mcf in California. In the sunnier Persian Gulf, the price could be as low as  USD 2 per Mcf.

In the Middle East, where much of the gas is imported in liquid form, solar thermal has the potential to generate even greater cost savings as liquefied natural gas prices stand at about USD 12 per Mcf.

"We're not selling on a platform of what I would call green goodness," GlassPoint Chief Executive Officer Rod MacGregor said in an interview. "Our proposition is entirely economic."

According to Raymond James analyst Pavel Molchanov, the technology also provides a hedge against price increases for gas, which he forecasts at $5 per Mcf long-term.

Because solar thermal technology is powered by sunlight, the cost of deploying it is entirely upfront.

Going mainstream

GlassPoint's project uses mirrors to focus sunlight onto a steel pipe carrying water. As the water travels along the pipe, it turns to steam that can be injected into an oil well.

"It's glass and steel, that's all it is," said Molchanov, who estimates that solar has the potential to displace about 20 percent of the natural gas used in EOR in California alone. It could never replace it entirely because sunlight is inherently intermittent, even in the Persian Gulf and in California's Kern County, the state's top oil-producing county.

Solar thermal technology works best in very sunny regions, but Molchanov said it could be deployed -- though less lucratively -- in the Canadian oilsands region as well.

But solar EOR is still a long way from being mainstream.

"It's going to take time for oil companies, which tend to be fairly conservative, to adopt this," Molchanov said.

Berry Petroleum CEO Robert Heinemann said GlassPoint's pilot project worked because the startup built the plant itself to prove its technology would make economic sense.

"We cannot fund new technology," Heinemann said, but added that the company was interested in "any technology innovation that can lower our cost to generate steam."

Other than GlassPoint, which has just the one pilot project at Berry's 21Z oilfield, only one other solar EOR effort is close to coming online -- a partnership between Chevron and BrightSource Energy Inc in Coalinga, California.

The BrightSource project is scheduled to begin operating in the second half of this year, and Molchanov said if that program and GlassPoint's are successful, solar EOR could become mainstream within the next five years.

Neither BrightSource nor Chevron would comment on their project, but a major BrightSource investor said extending the life of existing oil wells made sense all around.

"We're not going to outgrow our needs for oil in my lifetime," said VantagePoint Capital Partners CEO Alan Salzman. "If you can extract more oil from existing facilities rather than having to go punch new holes in the Arctic or offshore, it has a highly preferable societal impact."

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