FRACKING
Fracking
Landscape with well
Despite its poor image, fracking causes little mess or disruption
Jul 14th 2012 |From the print edition
DEEP IN THE rolling tree-clad hills of Pennsylvania, on a hilltop close to a group of barns and farmhouses, Chevron’s Kikta well pad can be found at the end of a narrow country lane. This is part of the Marcellus shale, 250,000 sq km (96,500 square miles) of gasfields stretching across Pennsylvania, West Virginia and New York state. The drilling rig is 30 metres high, so large that it is hard to imagine how it could have got to the site, but it comes apart and the components fit onto lorries. It sits on an acre of flattened hilltop, along with a million-gallon reservoir to provide the huge quantities of water needed for extracting shale gas. Vehicles and machines are poised for action. Four wells will be drilled from this one pad. The drill will first bore 2,300-2,600 metres (7,500- 8,500 feet) downwards; then the drill bit is coaxed to the horizontal and the drilling continues outwards. Gas will start rising to the wellheads, just a few metres apart, after the next task is performed: hydraulic fracturing, or fracking.
Shale is a hard rock made up of sediments deposited on sea and lake beds hundreds of millions of years ago. To make it give up the gas held within, it needs to be broken up. Along up to 2km of horizontal pipes 14cm wide, holes open out onto the shale. Along small sections, water, fine sand (the “proppant”) and fracking fluid are injected under high pressure.
Special report
An unconventional bonanza
Gas works
Landscape with well
Sorting frack from fiction
A world of plenty
Careful what you wish for
A liquid market
A better mix
Sources & acknowledgements
Reprints
Related topics
Pennsylvania
Environmental problems and protection
Technology
Science and technology
Nature and the environment
The fracking fluid, which makes up about 1% of the brew, is a combination of gelling polymers of the sort found in food and cosmetics, to keep the sand suspended in the fluid as it is pumped into the well; chelants (like kettle descaler) to break down the polymer and release the sand when it arrives in the fractured shale; friction reducer (as found in nappies) to keep the flow smooth; and biocide, a disinfectant that stops bacteria gumming up the well.
On reaching the shale, the mixture of water and fracking fluid bursts open the rock and the sand keeps the fractures open, allowing the gas to flow to the surface. The power for the operation is supplied by the engines of a fleet of trucks, so this stage of the process can be noisy. But it takes only five days to complete, and then the shale gas begins to flow and the trucks, portable offices and hoppers are taken to another site to start all over again.
After a little over a year of activity, at least half of which is taken up with planning and obtaining permits, most of the land is reclaimed, apart from a little pipework and a water tank on a small section of the original site. At Elias, a completed Chevron operation, the only sound to disturb the replanted clover meadow is a faint whooshing as gas passes to an underground pipe network. It is the sound of dollars clocking up, and it could go on for 30-50 years. The gas rushes out rapidly in the first year or so before tailing off quite fast to a third of the original flow and gradually declining thereafter.
The remarkable thing about extracting shale gas, says Bruce Niemeyer, Chevron’s regional boss, is “the absence of anything remarkable going on” above the ground. The Marcellus is not what you might expect a gasfield to look like: the views can be spectacularly beautiful. And not only is it good to look at, its gas is also cheap to develop and cheap to produce. The average cost per well is $6m-7m, against $7m-11m in the Haynesville shale, spread across parts of Arkansas, Louisiana and Texas. Moreover, the Marcellus is close to the big markets of the Atlantic coast, so the gas is cheap to transport too. If only every gasfield were like that.
From the print edition: Special report
Recommend
71
Submit to reddit
inShare
1
View all comments (87)
Related items
TOPIC: Pennsylvania »
Letters: On immigration, Syria, textbooks, Ayn Rand, Spain, voting
Access to the polls: Counting voters, counting votes
US election 2012: Swing states: Pennsylvania
TOPIC: Environmental problems and protection »
The anthropocene: Atmospheric governance
Climate conference: What Doha did
Global warming: Fleeing the storms
TOPIC: Technology »
E-commerce in Greece: The right side of the Styx?
News aggregation: Extra! Extra! Read half about it!
Radio interference: Difference Engine: Phones up in the air
TOPIC: Science and technology »
The Higgs boson: Double trouble
Network speeds: An algebraic decongestant
Demography: The convergence of the twain
More related topics:
Nature and the environment Energy technology Alternative energy
Want more? Subscribe to The Economist and get the week’s most relevant news and analysis.
Print editionX
Jul 14th 2012
Jul 7th 2012
Jun 30th 2012
Jun 23rd 2012
Next in The world this weekX
Politics this week
Next in The world this weekX
Business this week
Next in The world this weekX
KAL’s cartoon
Next in LeadersX
The American economy
Comeback kid
America’s economy is once again reinventing itself
Next in LeadersX
Romania and democracy
Putsch-up job
Another rickety European country turns ugly—and also points to deeper problems in the European…
Next in LeadersX
Constitutional reform
Lording it
Britain’s Parliament is deadlocked over House of Lords reform. Let the people decide
Next in LeadersX
Russia’s economy and the World Trade Organisation
A chance to get down to business
Does Vladimir Putin really want Russia to be a less terrible place to do business? We will now find…
Next in LeadersX
Libya’s election
So far, so hopeful
Though much could still go wrong, the case for Western intervention is being vindicated
Next in LettersX
Letters
On London, Palestine, hypoxia, currency, super-sizing, repetition
Next in BriefingX
America’s economy
Points of light
Amid the gloom there are unexpected signs of boom, especially in energy
Next in United StatesX
Election laws
Voting rights, voting wrongs
Strict rules on voting could determine the outcome of November’s election
Next in United StatesX
Mitt Romney and the Koch brothers
On the beach
Protesters take to the sky and to the sand
Next in United StatesX
Trains in Hawaii
Aloha, again
Hawaii tries to bring a railway to its capital
Next in United StatesX
Charlie Rangel
His last roar?
The Lion of Harlem narrowly keeps his congressional seat, for now
Next in United StatesX
Wyoming
Poor rich kid
One downside of cheap energy
Next in United StatesX
Greening Houston
Changing the plans
America’s oil capital is throwing up a few environmental surprises
Next in United StatesX
Lexington
The China-bashing syndrome
Both parties are cranking up their rhetoric against the world’s second-largest economy
Next in The AmericasX
South American integration
Mercosur RIP?
Mounting protectionism and the rule-breaking admission of Venezuela have fatally undermined a…
Next in The AmericasX
Cuban health care
Under observation
An outbreak of cholera tests a much-praised health system
Next in The AmericasX
After Mexico’s election
Counted out
López Obrador, sore loser
Next in AsiaX
Politics in Malaysia
The racial question
Harassment of pro-democracy activists in Malaysia reveals a worrying undercurrent of racism
Next in AsiaX
Japan-China relations
Jingoist jangles
A row over some goat-infested rocks heats up
Next in AsiaX
South Korean politics
The iron lady in red
Could a strongman’s daughter be South Korea’s first female leader?
Next in AsiaX
Afghanistan’s economy
The hand that feeds
More aid is pledged, but it will not solve Afghanistan’s many problems
Next in AsiaX
Thai rice
Less paddy power
Populist politics mess up Thailand’s biggest crop
Next in AsiaX
Post-war Sri Lanka
Tiger country
A rebel stronghold becomes an unlikely tourist trap
Next in ChinaX
Inner Mongolia
Little Hu and the mining of the grasslands
Soaring demand for a region’s minerals stirs unrest and brings challenges for a rising political…
Next in Middle East and AfricaX
South Sudan
Unhappy birthday
The world’s newest country, founded a year ago, has made a pretty bad start
Next in Middle East and AfricaX
Nigeria’s troubles
Getting worse
An extreme Islamist group is becoming ever more lethally effective
Next in Middle East and AfricaX
Fighting Malaria
Net benefit
The global assault on malaria still needs more cash
Next in Middle East and AfricaX
Libya’s election
A big step for a battered country
So far the general election looks a lot better than most Libyans expected
Next in Middle East and AfricaX
Egypt
Brothers v generals, again
A new Islamist president is struggling to assert himself over Egypt’s generals
Next in Middle East and AfricaX
Shias in Saudi Arabia and Bahrain
Shooting the sheikhs
Violence against Shia clerics troubles Saudi Arabia and Bahrain
Next in EuropeX
Germany’s government
On the home front
Despite appearances and much adverse commentary, Chancellor Angela Merkel remains surprisingly…
Next in EuropeX
Spanish woes
Hard pounding
Spain discovers that bail-outs bring austerity and lost freedom
Next in EuropeX
France and prostitution
On the game
A new government wants to abolish the oldest profession
Next in EuropeX
Romania in trouble
Levers of power
Poor Romania, its politics is suddenly getting interesting
Next in EuropeX
Hungary’s government
Viktor and Victor
Lessons from Budapest to Bucharest
Next in EuropeX
Remembering Srebrenica
Commemoration day
The genocide’s symbolic importance to Bosnian Muslims is growing
Next in EuropeX
Charlemagne
Euro snakes and ladders
Europe’s leaders climb slowly upward, but all too often are then dragged back down
Next in BritainX
Reforming the House of Lords
The coalition’s millstone
The government self-harms over a proposal to give Britain an elected upper house
Next in BritainX
The LIBOR scandal
Culture clubbed
A possible winner emerges from the Barclays mess
Next in BritainX
Fashion retail
No sparks
M&S is struggling to catch up with changing fashions
Next in BritainX
Successful cities
Floreat Preston
Why some cities thrive while others slump
Next in BritainX
London’s Tube and big data
Underground movement
Transport for London gradually learns how to use data
Next in BritainX
Demography and transport
When the grannies get going
The rise of geriatric drivers
Next in BritainX
Bagehot
Scourge of slums
A dynamic mayor’s plans for his borough may be good for Newham, less so for London
Next in InternationalX
Contraception and development
Choice not chance
Family planning returns to the international development agenda
Next in InternationalX
Religious products
Prayers and playthings
Making money from believers
Next in InternationalX
Correction
Next in Special reportX
An unconventional bonanza
New sources of gas could transform the world’s energy markets, says Simon Wright—but it won’t…
Next in Special reportX
America’s bounty
Gas works
Shale gas is giving a big boost to America’s economy
Next in Special reportX
European worries
Sorting frack from fiction
Shale gas’s poor image in Europe is largely unjustified
Next in Special reportX
Global reserves
A world of plenty
Of all the countries now looking for shale gas, China has the most potential
Next in Special reportX
Gas pricing in Europe
Careful what you wish for
The pros and cons of a more competitive gas market in Europe
Next in Special reportX
LNG
A liquid market
Thanks to LNG, spare gas can now be sold the world over
Next in Special reportX
Energy policy
A better mix
Shale gas will improve global security of energy supplies
Next in BusinessX
Industry in Russia
Lurching into the fast lane
Russia is about to join the World Trade Organisation. Can its industry cope?
Next in BusinessX
Innovation in Russia
Can Russia create a new Silicon Valley?
Sergey Brin is still in California
Next in BusinessX
Corporate transparency
Measuring mud
How transparent are the world’s biggest listed companies?
Next in BusinessX
Metal thieves in Germany
Stealing steel
Why the trains are late
Next in BusinessX
Consumer goods in India
Seducing shoppers in Sticksville
India’s small towns are the next frontier
Next in BusinessX
Semiconductors
Chipping in
A deal to keep Moore’s law alive
Next in BusinessX
Schumpeter
Intoxivation
How a new market is producing a wave of innovation in an old industry
Next in BusinessX
Correction: Airbus A320
Next in Finance and economicsX
Interest rates
The fog of LIBOR
LIBOR is badly broken. But for now, a flawed number is better than none
Next in Finance and economicsX
Probe watch
Investigations galore
It’s not just LIBOR. Banks and brokers are under scrutiny from all quarters
Next in Finance and economicsX
Credit in Brazil
Maxing out
A spike in defaults signals a need for caution, not yet panic
Next in Finance and economicsX
Buttonwood
The golden rules of banking
They make the rules, and get the gold
Next in Finance and economicsX
Quantitative easing
QE, or not QE?
An assessment of the most controversial weapon in the central banker’s armoury
Next in Finance and economicsX
Free exchange
Hammer time
How auction theory can help improve the system for setting LIBOR
Next in Science and technologyX
Marine technology
A voyage of discovery
New technology can make ships more versatile, more efficient and cleaner, too
Next in Science and technologyX
Psychology
Tall, dark and stable
Wobbly furniture leads to a desire for emotional stability
Next in Science and technologyX
Drug delivery
Made to order
Making medicine in the part of the body that needs it may soon be possible
Next in Science and technologyX
Ecology
Under the mistletoe
An experiment on a parasitic plant proves an important ecological concept
Next in Science and technologyX
Making tracks
Next in Books and artsX
The heritage debate
Living treasure
UNESCO is better at naming enemies than finding friends
Next in Books and artsX
Rehabilitating capitalism
For those who have lost faith
Next in Books and artsX
Life in Congo
War and peace
Next in Books and artsX
Racism in sport
The black white hope
Next in Books and artsX
Harry Belafonte’s autobiography
Twentieth-century lion
Next in ObituaryX
Yitzhak Shamir
A fighter for Israel
Yitzhak Shamir, a fighter for Israel, died on June 30th, aged 96
Next in Economic and financial indicatorsX
Output, prices and jobs
Next in Economic and financial indicatorsX
Trade, exchange rates, budget balances and interest rates
Next in Economic and financial indicatorsX
The Economist commodity-price index
Next in Economic and financial indicatorsX
Agricultural commodities
Next in Economic and financial indicatorsX
Markets
Print editionX
Jul 14th 2012
Jul 21st 2012
Jul 28th 2012
Aug 4th 2012
From the print edition Jul 14th 2012
Comment (87)
Print
E-mail
Reprints & permissions
Advertisement
Latest blog posts – All times are GMT
The Economist: Digital highlights, February 9th 2013
Newsbook – 15 mins ago
A political scandal in Spain: Trust is priceless
Newsbook – 3 hours 54 mins ago
John Brennan: The debate over drones
Lexington’s notebook – Feb 7th, 23:45
Recommended economics writing: Link exchange
Free exchange – Feb 7th, 22:54
This week in print: Ecuador’s election, the IMF and Argentina,…
Americas view – Feb 7th, 21:52
Central banking: Jeremy Stein leans against the wind
Free exchange – Feb 7th, 21:34
Greyhound racing: The final flutter
Game theory – Feb 7th, 20:35
More from our blogs »
Most popular
RecommendedCommented
Recommended
1
The Nordic countries
The next supermodel
2The World Economic Forum: A tale of two Davoses
3Northern lights
4The World Economic Forum in Davos: Leaders without followers
5Politics this week
Commented
1
The Nordic countries
The next supermodel
2Italian politics: Gaffe or provocation?
3Spanish politics: Can Rajoy hang on to his job?
4Presidential voting: Moving the goalposts
5Russian politics: The Kremlin’s new Anti-Americanism
Advertisement
Products & events
Stay informed today and every day
Get e-mail newsletters
Subscribe to The Economist’s free e-mail newsletters and alerts.
Follow The Economist on Twitter
Subscribe to The Economist’s latest article postings on Twitter
Follow The Economist on Facebook
See a selection of The Economist’s articles, events, topical videos and debates on Facebook.
Classified ads
About The EconomistMedia directoryAdvertising infoStaff booksCareer opportunitiesSubscribeContact usSite index[+] Site Feedback