U.S. Geological Survey
Scientists
have been studying methane hydrates for years, including this drill
used to estimate how much there might be under the Arctic permafrost.
By Miguel Llanos, msnbc.com
Could the future of cleaner fossil fuel really be frozen crystals now trapped in ocean sediments and under permafrost?
Backed
by an oil industry giant, the Obama administration recently tested a
drilling technique in Alaska's Arctic that it says might eventually
unlock "a vast, entirely untapped resource that holds enormous potential
for U.S. economic and energy security." Some experts believe the
reserves could provide domestic fuel for hundreds of years to come.
U.S. Geological Survey
Natural gas is released from methane hydrates.
Those crystals, known as methane hydrates, contain natural gas but so far releasing that fuel has been an expensive proposition.
The
drilling has its environmental critics, but there’s also a climate
bonus: The technique requires injecting carbon dioxide into the ground,
thereby creating a new way to remove the warming gas from the
atmosphere.
"You're storing the CO2, and also liberating the natural gas,"
Christopher Smith, the Energy Department's oil and natural gas deputy
assistant secretary, told msnbc.com. "It's kind of a two-for-one."
The Energy Department,
in a statement last week, trumpeted it as "a successful, unprecedented test" and vowed to pump at least $6 million more into future testing.
"While
this is just the beginning, this research could potentially yield
significant new supplies of natural gas," Energy Secretary Steven Chu
announced
.
ConocoPhillips, the oil company that worked on
the test at its oil facility in Alaska's North Slope, was hopeful the
technique could become economically feasible for producing natural gas, a
fuel that's much cleaner than petroleum.
"Many experts believe
that methane hydrates hold significant potential to supply the world
with clean fossil fuel," spokesman Davy Kong told msnbc.com. "The
completion of this successful test of technology is an important step in
developing production technology to access this potential resource
while sequestering carbon dioxide."
But even the CO2 bonus doesn't
convince environmentalists worried about a reliance on fossil fuels --
the key source for manmade carbon dioxide emissions.
"Finding
new ways to produce fossil fuels doesn't change the fact that we can't
transfer to the atmosphere all the carbon in the fuels we already have
without causing catastrophic climate disruption," Dan Lashof, a climate
analyst with the Natural Resources Defense Council, told msnbc.com.
"Rather
than perpetually seeking new sources of fossil fuel, our federal
research dollars should be going into carbon-free energy sources" like
solar and wind, added Brendan Cummings, public lands director at the
Center for Biological Diversity, a group that's tied climate impacts to
its petitions to protect wildlife.
Cummings also worries about inadvertent releases of methane, which is even more powerful as a warming gas than CO2.
Alaska's
Arctic is the U.S. area "most under stress from warming," he
added. "Even if we could safely develop and install infrastructure
there, we're still industrializing an area that essentially should be
left alone."
Methane hydrate fans include Vladimir Romanovsky, a permafrost expert at the University of Alaska-Fairbanks.
It
has "great potential and not much danger" compared to conventional
natural gas, he said. "Extracting energy and sequestering CO2 is win-win
situation."
Sen. Lisa Murkowski of Alaska, the ranking Republican
on the Senate energy committee, noted that future testing needs to look
at issues like soil stability, but overall she was bullish.
"If we can bring this technology to commercialization, it would truly be a game changer for America,"
she said in a statement.
"Taken
together, U.S. lands and waters contain a quarter of the world’s
methane hydrates -- enough to power America for 1,000 years at current
rates of energy consumption," her office added.
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Alaska
alone could hold 600 trillion cubic feet of methane hydrates onshore,
the office stated, citing U.S. Geological Survey estimates. That's
potentially three times more than the known natural gas deposits in
Alaska.
The state also estimates a whopping 200,000 trillion cubic
feet of methane hydrates lie under Alaskan waters. That reflects that
fact that the vast majority of methane hydrates -- the U.S. Geological
Survey estimates 99 percent -- are in ocean sediments.
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A
key obstacle for Alaska, and many other areas, is that natural gas
pipelines would have to be built. Moreover, today's low natural gas
prices due to a saturated market mean little investment incentive, at
least for now.
U.S. Geological Survey
A methane hydrate crystal is seen in sediment pulled up by a core drill.
Smith, the Energy Department official, said the testing done earlier
this year was notable because it was the first to produce natural gas
for 30 days straight. Previous tests had only been able to do that for a
few days, and the longer run should make for better analysis, he said.
"The next steps will be determined by what we learn" in the lab over the next few months, he added.
One
hydrate expert who had been skeptical said the test showed him that it
is possible to remove a costly step: melting, or dissociating, methane
from the hydrates to get the fuel.
"The advantage I see is that
the need to dissociate hydrates in order to recover the gas will be
reduced and probably eliminated," Gerald Holder, dean of engineering at
the University of Pittsburgh, told msnbc.com.
Having worked with
the Energy Department on hydrates, Holder also said the process
shouldn't have any environmental impacts "beyond what drilling for
conventional gas entails."
So when might we see commercial production? "I would guess decades," he said.
"One decade would be optimistic," he added, "but not absurd."