LOS ANGELES — In a downtown Los Angeles skyscraper, Hal Washburn is drilling for oil.
Using a black high-definition computer screen, the petroleum engineer traces the white outlines of century-old vertical oil wells punctuated by the bright green and red of more recent efforts. The newer wells flare with what look like thousands of tiny hairs; the hotter the color, the greater the amount of oil.

“Today, we drill a lot of wells on the computer before we drill underground,” said Washburn, chief executive of BreitBurn Energy Partners.

The new crude being tapped – on screen and in real life – comes from Santa Barbara County’s Orcutt oil field, one of the state’s oldest, previously thought to be in decline.
“It’s been a huge home run for us,” Washburn said.

Domestic energy producers like BreitBurn have helped to reverse the nation’s once-escalating dependence on foreign oil by finding new ways to figure out the secrets buried beneath our feet.
U.S. net petroleum imports have fallen to about 47 percent of the nation’s consumption, down from a record 60.3 percent in 2005, Energy Information Administration statistics show. It’s been 15 years since the nation’s reliance on foreign oil has been this low.

Several factors figure into the import decline, but a big one is a little surprising: U.S. petroleum exploration is experiencing a quiet renaissance with the help of technology and new drilling techniques.

The number of oil rigs in production in the U.S. has reached a 24-year high, according to oil field services company Baker Hughes. In 2005, domestic production was 1.89 billion barrels. This year, experts say, production is expected to surpass 2 billion barrels.

In the past decade, geoscientists and engineers have come as close as technologically possible to creating a transparent image of the underground, bringing new life to old wells and finding billion-barrel formations, called “elephants.”

“What’s happening across the U.S. demonstrates how technology again and again opens new doors, and also old doors, that people thought were closed forever,” said Daniel Yergin, author of “The Quest: Energy, Security, and the Remaking of the Modern World,” the sequel to his Pulitzer Prize winner “The Prize.”

Bruce Bullock, executive director of the Maguire Energy Institute at Southern Methodist University, was more specific: “Three-dimensional seismic technology has become much more sophisticated. New drilling methods allow them to penetrate formations that were once thought to be impenetrable. So we’ve seen a lot of investment dollars going back into areas that had appeared very unpromising.”

BreitBurn isn’t the only California oil company looking to reverse California’s long decline in oil production. In the past five years, privately held Signal Hill Petroleum has buried 6,000 small yellow canisters around Long Beach and Signal Hill that contain sophisticated equipment so sensitive it can record the vibrations of a person walking past.

The devices work in tandem with the company’s fleet of “vibroseis” trucks, 68,000-pound vehicles that use hydraulics to bounce. The bouncing trucks produce vibrations that create images of formations as far as 3 miles underground, said Dave Slater, chief operating officer for Signal Hill Petroleum.

Slater says his 110-employee company and a subsidiary, the 70-employee Nodal Seismic, have sunk “tens of millions of dollars” into the effort.

“When we import oil, we really get no jobs out of it, no taxes from that oil. It’s just a huge suction on the economy,” Slater said. “And down below us, we believe there is a lot of oil that hasn’t been tapped.”