Oil extraction technology marches on. University of Pittsburgh engineers show crude oil extraction could be improved significantly and accessible domestic oil reserves could be expanded with their new ...

The shale revolution in America is helping to bring oil prices lower, keep gas prices down, and give the economy a boost in the process. But an oil-extraction process known as horizontal drilling and ...

The Belridge oil field near Bakersfield, Calif., is one of the largest in the country. It has been producing oil for more than a century and last year produced about 76,000 barrels a day, according to ...

Reporting from Sacramento — Gov. Gavin Newsom on Friday defended firing California’s top oil industry regulator for issuing too many hydraulic fracturing permits, but offered no details on whether he ...