The significance of this dramatic revision is shown by the
effusive estimates that had previously gained wide acceptance. In May 2013, National Geographic wrote: “According to U.S. government estimates, as much as
15.4 billion barrels of oil could be locked within the Monterey shale. That
would be more than double the amount of oil reckoned to lie within the Bakken
shale, the booming play that has made North Dakota the nation's number 2
oil-producing state behind Texas. It's more than five times the oil of Texas'
thriving Eagle Ford shale. Indeed, Monterey holds more than half of the
undeveloped, technically recoverable shale oil resources believed to exist in
the continental United States.”
It seems reasonable to conclude from this that the new estimate for the Monterey Shale reduces U.S. recoverable shale oil resources by 50%. Poof!
It seems reasonable to conclude from this that the new estimate for the Monterey Shale reduces U.S. recoverable shale oil resources by 50%. Poof!
Federal energy authorities have
slashed by 96% the estimated amount of recoverable oil buried in California's
vast Monterey Shale deposits, deflating its potential as a national "black
gold mine" of petroleum.
Just 600 million barrels of oil can
be extracted with existing technology, far below the 13.7 billion barrels once
thought recoverable from the jumbled layers of subterranean rock spread across
much of Central California, the U.S. Energy Information Administration said.
The new estimate, expected to be
released publicly next month, is a blow to the nation's oil future and to
projections that an oil boom would bring as many as 2.8 million new jobs to
California and boost tax revenue by $24.6 billion annually.
The Monterey Shale formation
contains about two-thirds of the nation's shale oil reserves. It had been seen
as an enormous bonanza, reducing the nation's need for foreign oil imports
through the use of the latest in extraction techniques, including acid
treatments, horizontal drilling and fracking.
The energy agency said the earlier
estimate of recoverable oil, issued in 2011 by an independent firm under
contract with the government, broadly assumed that deposits in the Monterey
Shale formation were as easily recoverable as those found in shale formations
elsewhere.
The estimate touched off a
speculation boom among oil companies. The new findings seem certain to dampen
that enthusiasm.
Kern County in particular has seen
a flurry of oil activity since 2011, with most of the test wells drilled by independent
exploratory companies. Major oil companies have expressed doubts for years
about recovering much of the oil.
The problem lies with the geology
of the Monterey Shale, a 1,750-mile formation running down the center of
California roughly from Sacramento to the Los Angeles basin and including some
coastal regions.
Unlike heavily fracked shale
deposits in North Dakota and Texas, which are relatively even and layered like
a cake, Monterey Shale has been folded and shattered by seismic activity, with
the oil found at deeper strata.
Geologists have long known that the
rich deposits existed but they were not thought recoverable until the price of
oil rose and the industry developed acidization, which eats away rocks, and
fracking, the process of injecting millions of gallons of water laced with sand
and chemicals deep underground to crack shale formations.
The new analysis from the Energy
Information Administration was based, in part, on a review of the output from
wells where the new techniques were used.
"From the information we've
been able to gather, we've not seen evidence that oil extraction in this area
is very productive using techniques like fracking," said John Staub, a
petroleum exploration and production analyst who led the energy agency's
research.
"Our oil production estimates
combined with a dearth of knowledge about geological differences among the oil
fields led to erroneous predictions and estimates," Staub said.
Compared with oil production from
the Bakken Shale in North Dakota and the Eagle Ford Shale in Texas, "the
Monterey formation is stagnant," Staub said. He added that the potential
for recovering the oil could rise if new technology is developed.
A spokesman for the oil industry
expressed optimism that new techniques will eventually open up the Monterey
formation.
"We have a lot of confidence
in the intelligence and skill of our engineers and geologists to find ways to
adapt," said Tupper Hull, spokesman for the Western States Petroleum Assn.
"As the technologies change, the production rates could also change
dramatically."
Rock Zierman, chief executive of
the trade group California Independent Petroleum Assn., which represents many
independent exploration companies, also sounded hopeful.
"The smart money is still
investing in California oil and gas," Zierman said.
"The oil is there,"
Zierman said. "But this is a tough business."
Environmental organizations
welcomed the news as a turning point in what had been a rush to frack for oil
in the Monterey formation.
"The narrative of fracking in
the Monterey Shale as necessary for energy independence just had a big hole
blown in it," said Seth B. Shonkoff, executive director of the nonprofit
Physicians Scientists & Engineers for Healthy Energy.
J. David Hughes, a geoscientist and
spokesman for the nonprofit Post Carbon Institute, said the Monterey formation
"was always mythical mother lode puffed up by the oil industry — it never
existed."
Hughes wrote in a report last year
that "California should consider its economic and energy future in the
absence of an oil production boom from the Monterey Shale."
The 2011 estimate was done by the
Virginia engineering firm Intek Inc.
Christopher Dean, senior associate
at Intek, said Tuesday that the firm's work "was very broad, giving the
federal government its first shot at an estimate of recoverable oil in the
Monterey Shale. They got more data over time and refined the estimate."
For California, the analysis throws
cold water on economic projections built upon Intek's projections.
In 2013, a USC analysis, funded in
part by the Western States Petroleum Assn., predicted that the Monterey Shale
formation could, by 2020, boost California's gross domestic product by 14%, add
$24.6 billion per year in tax revenue and generate 2.8 million new jobs.
* * *
Louis Sahagun, “U.S. officials cut estimate of recoverable
Monterey Shale oil by 96%,” Los Angeles
Times, May 20, 2014.
See also Josie Garthwaite, “Monterey Shale Shakes Up California's Energy Future,” National Geographic, May 27, 2013.
For an extensive report by J. David Hughes of the Post Carbon Institute, see Drilling California: A Reality Check on the Monterey Shale, December 2013. And see here for an earlier report by Hughes on the extravagant projections for the recovery of oil from shale deposits.
See also Josie Garthwaite, “Monterey Shale Shakes Up California's Energy Future,” National Geographic, May 27, 2013.
For an extensive report by J. David Hughes of the Post Carbon Institute, see Drilling California: A Reality Check on the Monterey Shale, December 2013. And see here for an earlier report by Hughes on the extravagant projections for the recovery of oil from shale deposits.