Acidizing could rival fracking in Monterey Shale

Fracking hasn't unleashed an oil production boom in California, at least not yet.

Could acid?

Companies trying to pry oil from a vast shale formation beneath Central California have been pumping powerful acids underground to dissolve the rock and free the petroleum within.

And there are hints that the process, known as "acidizing" a well, may work better than hydraulic fracturing in California's Monterey Shale, estimated to hold 15.4 billion barrels of oil.

Read full text at SF Gate