Showing posts with label gas. Show all posts
Showing posts with label gas. Show all posts

Wednesday, December 16, 2015

California Has a Huge Methane Gas Leak of approx. 80,000 tons per month but a fix won't be possible until April, 2016



California Has a Huge Gas Leak, and Crews Can’t Stop It Yet

Sarah Zhang 
 
Crews from SoCalGas and outside experts work on a relief well at the Aliso Canyon facility above the Porter Ranch area of Los Angeles, on December 9, 2015.
 
© Dean Musgrove/Los Angeles Daily News/AP/Pool Crews from SoCalGas and outside experts work on a relief well at the Aliso Canyon facility above the Porter Ranch area of Los Angeles, on December 9, 2015. 
 
 While the world was hammering out a historic agreement to curb carbon emissions—urged along by California, no less—the state was dealing with an embarrassing belch of its own. Methane, a greenhouse gas 70 times more potent than carbon dioxide, has been leaking out of a natural gas storage site in southern California for nearly two months, and a fix won’t arrive until spring.

The site is leaking up to 145,000 pounds per hour, according to the California Air Resources Board. In just the first month, that’s added up to 80,000 tons, or about a quarter of the state’s ordinary methane emissions over the same period. The Federal Aviation Administration recently banned low-flying planes from flying over the site, since engines plus combustible gas equals kaboom.
Steve Bohlen, who until recently was state oil and gas supervisor, can’t remember the last time California had to deal with a gas leak this big. “I asked this question of our staff of 30 years,” says Bohlen. “This is unique in the last three or four decades. This is an unusual event, period.”

Families living downwind of the site have also noticed the leak—boy, have they noticed. Methane itself is odorless, but the mercaptan added to natural gas gives it a characteristic sulfurous smell. Over 700 households have at least temporarily relocated, and one family has filed a lawsuit against the Southern California Gas Company alleging health problems from the gas. The gas levels are too low for long-term health effects, according to health officials, but the odor is hard to ignore.

Given both the local and global effects of the gas leak, why is it taking so long to stop? The answer has to do with the site at Aliso Canyon, an abandoned oil field. Yes, that’s right, natural gas is stored underground in old oil fields. It’s common practice in the US, but largely unique to this country. The idea goes that geological sites that were good at keeping in oil for millions of years would also be good at keeping in gas.



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Wednesday, October 14, 2015

Farmhouses are disappearing across the Groningen countryside as a peculiar, profound environmental crisis grips the province. Fracking in the Netherlands



the guardian

Shell and Exxon's €5bn problem: gas drilling that sets off earthquakes and wrecks homes

Groningen has been one of Europe’s richest gas fields for 30 years, and thousands of people say their homes have been damaged by the tremors that drilling sets off. Now a class action may finally bring them compensation – and force a rethink of European energy security
Annemarie Heite, whose home in Groningen has been scheduled for demolition after earthquakes caused by oil drilling.
‘Nobody is taking this seriously, not the school or the mayor, no one’ … Annemarie Heite, whose home in Groningen has been scheduled for demolition after earthquakes caused by oil drilling. Photograph: Hans Knikman/Demotix 
 
 
Five years ago, Annemarie Heite and her husband, Albert, bought their dream home; a traditional 19th-century farmhouse in Groningen province in the northern Netherlands. The couple planned to raise their two young daughters in this charming corner of the Dutch countryside. “Then, the living was still easy, and affordable,” Annemarie says, her tone bittersweet and nostalgic. Today, their house is scheduled for demolition.

Hundreds of earthquakes have wrecked the foundations of the Heites’ home and made it unsafe to live in. Annemarie’s biggest fear is the safety of her daughters. She points to a room. “This is where my children sleep,” she says, “and everyday I’m just picking up pieces of bricks and stuff from the ceiling.”

Heite fears that her children may not be any safer at school. Her daughter Zara goes to a local primary school that has not been structurally reinforced to withstand strong earthquakes. “I feel powerless. It feels like I can’t do anything,” Heite says. “It’s not like I’m a frantic, hysterical person, but nobody is taking this seriously, not the school or the mayor, no one.”
Next door, Heite’s neighbour’s farmhouse is already a pile of rubble, which yellow JCBs are clearing away. “It’s collapsed. It’s gone,” Heite says. “They lived there for 30 years … and over there behind the trees, they demolished another house.”

Farmhouses like Heite’s are disappearing across the Groningen countryside as a peculiar, profound environmental crisis grips the province. At the heart of it are two oil companies, Shell and Exxon Mobil, and a government that, for two decades, denied responsibility for its actions and ignored the voices of citizens and scientists. The scandal has already cost the oil companies €1.2bn [£880m], but last month a landmark court ruling gave the victims fresh hope that their voices could be ignored no longer. And if they are right, the consequences could be profound: a compensation bill that could stretch to more than €5bn in Holland, an energy security headache for Europe, and an invocation for the world to think about the real cost of burning fossil fuels.


Annemarie Heite’s earthquake-damaged family home in Groningen
Pinterest
 
‘Everyday I’m just picking up pieces of bricks and stuff from the ceiling’ … Heite’s earthquake-damaged family home. Photograph: Hans Knikman/Demotix 
 
 

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Sunday, May 4, 2014

According to new research, ongoing hydraulic fracking operations will only exacerbate seismic activity.

Fracking-linked earthquakes likely to worsen – seismologists

Published time: May 02, 2014 03:40



David McNew / Getty Images / AFP
David McNew / Getty Images / AFP
Ongoing hydraulic fracking operations will only exacerbate seismic activity, leading to heightened earthquakes in areas where wastewater is injected deep underground, according to new research.
To unleash natural gas, hydraulic fracturing - or fracking - requires large volumes of water, sand, and chemicals to be pumped underground. Scientists attending the Seismological Society of America (SSA) annual meeting said Thursday that this storage of wastewater in wells deep below the earth’s surface, in addition to fracking’s other processes, is changing the stress on existing faults, which could mean more frequent and larger quakes in the future.
Researchers previously believed quakes that resulted from fracking could not exceed a magnitude of 5.0, though stronger seismic events were recorded in 2011 around two heavily drilled areas in Colorado and Oklahoma.
“This demonstrates there is a significant hazard,” said Justin Rubinstein, a research geophysicist at the US Geological Survey (USGS), according to TIME magazine. “We need to address ongoing seismicity.”
Not all of the more than 30,000 fracking disposal wells are linked to quakes, but an accumulating body of evidence associates an uptick in seismic activity to fracking developments amid the current domestic energy boom.
The amount of toxic wastewater injected into the ground seems to provide some clarity as to what causes the earthquakes. A single fracking operation uses two to five million gallons of water, according to reports, but much more wastewater ends up in a disposal well.

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Sunday, April 6, 2014

Two Oklahoma earthquakes in a DAY put state on track for biggest year of seismic activity EVER

 



Earthquakes rattled residents in Oklahoma on Saturday, the latest in a series that have put the state on track for record quake activity this year, which some seismologists say may be tied to oil and gas exploration.
One earthquake recorded at 3.8 magnitude by the U.S. Geological Survey rocked houses in several communities around central Oklahoma at 7:42 a.m. local time.
Another about two hours earlier in the same part of the state, north of Oklahoma City, was recorded at 2.9 magnitude, USGS said.
Root issue: Seismologists believe the quakes may be tied to oil and gas exploration
Root issue: Seismologists believe the quakes may be tied to oil and gas exploration

Those two were preceded by two more, at 2.6 magnitude, and 2.5 magnitude, that also rolled the landscape in central Oklahoma early Saturday morning.
A 3.0 magnitude tremor struck late Friday night in that area as well, following a 3.4 magnitude hit Friday afternoon.
The quakes have set record levels of seismic activity through the state
The quakes have set record levels of seismic activity through the state

Austin Holland, a seismologist with the Oklahoma Geological Survey who tracks earthquake activity for the USGS, said the earthquake activity in the state is soaring.
'We have had almost as many magnitude 3 and greater already in 2014 than we did for all of 2013,' Holland said.

Last year's number of 'felt' earthquakes - those strong enough to rattle items on a shelf - hit a record 222 in the state. This year, less than four months into the year, the state has recorded 253 such tremors, according to state seismic data.

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Wednesday, February 19, 2014

Hmmmm Factor : Free pizza! Chevron issues controversial apology to town plagued by fracking explosion

Published time: February 19, 2014 00:53


Joe Raedle / Getty Images / AFP
Joe Raedle / Getty Images / AFP

With one person missing and presumed dead in an explosion at a natural gas well in a small Pennsylvania town, the company responsible is now under fire after apparently apologizing to the local community by handing out vouchers for free pizza.
It took five days for emergency crews to safely extinguish a fire that was set by an explosion that shook the small town of Bobtown, located in the far southwestern corner of the state. The blast gave off a loud hissing noise that could be heard from hundreds of yards away.
One resident told the Pittsburgh Post-Gazette that the explosion in a shale formation where Chevron Corp. has spent time fracking “sounded like a jet engine going five feet above your house.” John Kuis, 57, of nearby Dilliner said his dog started growling unusually at 6:45 a.m. on February 11 “then the house just sort of shock and there was a big loud bang.”
At least one employee who was working on the rig has not been found and is widely thought to have been killed – either in the initial explosion or during the five days the flames burned. Another worker was injured in the event.
Chevron has denied any knowledge of what caused the explosion. Company spokesman Ken Robertson told the local ABC affiliate that workers were preparing to run tubing, which is done when wells are being readied for production, and that “there is not enough fuel being emitted to sustain combustion, and with the cooling of the crane, the ignition source has been removed.”
The Philadelphia Daily News has since discovered that residents of Bobtown – a census-designated community of fewer than 1,000 people that revolves mostly around coal mining – have started receiving coupons for one free pizza and a two-liter of soda from the local Bobtown pizza.
“Chevron recognizes the effect this has had on the community,” the company said on its website. “We value being a responsible member of this community and will continue to strive to achieve incident-free operations. We are committed to taking action to safeguard our neighbors, our employees, our contractors and the environment.”


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Friday, February 7, 2014

New study shows that fracking boom is happening in places that can least afford to lose precious water supplies


- Jon Queally, staff writer
Almost half (47%) of all U.S. wells are being developed in regions with high to extremely high water stress. This means that more than 80 percent of the annual available water is already allocated to municipal, industrial and agricultural users in these regions. (Source: Ceres)The irony of fracking: It destroys the natural resource it needs most. The tragedy for those living nearby fracking operations: That natural resource is the fresh—and increasingly scarce—water supply on which they, too, depend.
And not only does fracking—or hydraulic fracturing—demand enormous amounts of fresh water no matter where it takes places, a troubling new study released Wednesday found that a majority of places where the controversial drilling technique is most prevalent are the same regions where less and less water is available.
Overlay the regions where most of the fracking is being done in North American with the places experiencing the most troubling and persistent water resource problems and the resulting picture becomes an alarm bell as politicians and the fossil fuel industry continue to push fracking expansion as the savior for the U.S. and Canada's energy woes.
According to the report, Hydraulic Fracturing and Water Stress: Water Demand by the Numbers (pdf), produced by the non-profit Ceres investor network, much of the oil and gas fracking activity in both the U.S. and Canada is happening in "arid, water stressed regions, creating significant long-term water sourcing risks" that will strongly and negatively impact the local ecosystem, communities, and people living nearby.
“Hydraulic fracturing is increasing competitive pressures for water in some of the country’s most water-stressed and drought-ridden regions,” said Ceres President Mindy Lubber, in announcing Hydraulic Fracturing and Water Stress: Water Demand by the Numbers. “Barring stiffer water-use regulations and improved on-the-ground practices, the industry’s water needs in many regions are on a collision course with other water users, especially agriculture and municipal water use."
Richard Heinberg, senior fellow of the California-based Post Carbon Institute and author of a recent book on the "false promise" of the fracking industry, says the irony of the study's findings "would be delicious if it weren't so terrifying."
"Nationally," according to Heinberg, "only about 50 percent of fracking wastewater is recycled. Billions of gallons of freshwater are still taken from rivers, streams, and wells annually for this purpose, and—after being irremediably polluted—this water usually ends up being injected into deep disposal wells. That means it is no longer available to the hydrological cycle that sustains all terrestrial life."
Click here to look at Ceres' interactive map on fracking and water use.
The study drew on industry data detailing water usage from from 39,294 oil and gas wells from January 2011 through May 2013 and compared that information with "water stress indicator maps" developed by the World Resources Institute (WRI).
What it found:
Over 55 percent of the wells hydraulically fractured were in areas experiencing drought and 36 percent overlay regions with significant groundwater depletion – key among those, California which is in the midst of a historic drought and Texas, which has the highest concentration of shale energy development and hydraulic fracturing activity in the U.S.
Specifically:
In Texas, which includes the rapidly developing Eagle Ford and Permian Basin shale plays, more than half (52 percent) of the wells were in high or extreme high water stress areas. In Colorado and California, 97 and 96 percent of the wells, respectively, were in regions with high or extremely high water stress. Nearly comparable trends were also shown in New Mexico, Utah and Wyoming.
Among hundreds of hydraulic fracturing companies whose water use was evaluated, those with the highest exposure to water sourcing risk are Anadarako (APC), Encana (ECA), Pioneer (PXD) and Apache (APA). Most of the wells being developed by each of these companies are in regions of high or extreme water stress. The top three service providers, Halliburton, (HAL) Schlumberger (SLB) and Baker Hughes (BHI), handled about half of the water used for hydraulic fracturing nationally and also face water sourcing risks.
Although water use for hydraulic fracturing is often less than two percent of state water demands, the impacts can be large at the local level, sometimes exceeding the water used by all of the residents in a county.
"It's a wake-up call," Professor James Famiglietti, a hydrologist at the University of California, Irvine, told the Guardian. "We understand as a country that we need more energy but it is time to have a conversation about what impacts there are, and do our best to try to minimise any damage."
The irony of the latest findings, explained Heinberg in an email to Common Dreams, is based on the fact that "much of the fracking boom is centered in the western United States—Texas, Oklahoma, Colorado, and California—which just happens to be drying up, likely as a result of climate change. And that climate change, in turn, is happening because we're burning fossil fuels like oil and natural gas."
Heinberg observed that the Ceres report is largely written from the standpoint of the oil and gas companies—using much of their data—and directed at those who may be invested or would like to invest in the continuation or proliferation of the industry. However, he indicated, detailing the increasing difficulties the industry and its investors are likely to experience in sourcing water for their operations is still valuable for those opposed to fracking.
"In California, where I live," he said, "we're experiencing a 500-year drought. The grape-wine industry here in Sonoma County is facing disaster. Farmers in the Central Valley are weighing whether to plant at all this year. The fact that California's Democratic governor [Jerry Brown] wants to spend what little water we have on fracking—which will only make our climate problems worse—makes the report frighteningly relevant."
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Sunday, December 22, 2013

Fracking in Texas: the real cost

TheGuardian






Published on Dec 19, 2013
Fracking in Texas: the real cost

Subscribe to the Guardian HERE: http://bitly.com/UvkFpD

In north Texas, the pumping heart of the oil and gas industry, an energy company are drilling five wells behind Veronica Kronvall's home. The closest two are within 300ft of her tiny patch of garden, and their green pipes and tanks loom over the fence. As the drilling began, Kronvall, 52, began to suffer nosebleeds, nausea and headaches. Her home lost nearly a quarter of its value and some of her neighbours went into foreclosure

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Christina Mills in Ponder, Texas As well as struggling with the noise and smells, Christina Mills says, there was the dust: 'It took the paint off my car.' Photograph: Deia Schlosberg for the Guardian

Fracking hell: what it's really like to live next to a shale gas well

Nausea, headaches and nosebleeds, invasive chemical smells, constant drilling, slumping property prices – welcome to Ponder, Texas, where fracking has overtaken the town. With the chancellor last week announcing tax breaks for drilling companies, could the UK be facing the same fate?

Link to video: Fracking in Ponder, Texas: the real cost

Veronica Kronvall can, even now, remember how excited she felt about buying her house in 2007. It was the first home she had ever owned and, to celebrate, her aunt fitted out the kitchen in Kronvall's favourite colour, purple: everything from microwave to mixing bowls. A cousin took pictures of her lying on the floor of the room that would become her bedroom. She planted roses and told herself she would learn how to garden.
What Kronvall did not imagine at the time – even here in north Texas, the pumping heart of the oil and gas industry – was that four years later an energy company would drill five wells behind her home. The closest two are within 300ft of her tiny patch of garden, and their green pipes and tanks loom over the fence. As the drilling began, Kronvall, 52, began having nosebleeds, nausea and headaches. Her home lost nearly a quarter of its value and some of her neighbours went into foreclosure. "It turned a peaceful little life into a bit of a nightmare," she says.
Energy analysts in the US have been as surprised as Kronvall at how fast fracking has proliferated. Until five years ago, America's oil and gas production had been in steady decline as reservoirs of conventional sources dried up. Then a Texas driller, George Mitchell, began trying out new technologies on the Barnett Shale, the geological formation that lies under the city of Fort Worth, Texas, and the smaller towns to the north, where Kronvall lives. Mitchell did not invent the technique. Hydraulic fracturing, or fracking, was first used in the 1940s to get the gas out of conventional wells. As the well shaft descended into the layer of shale, the driller would blast 2m-4m gallons of water, sand and a cocktail of chemicals down the shaft at high pressure, creating thousands of tiny cracks in the rock to free the gas.
Mitchell's innovation was to combine the technology with directional drilling, turning a downward drill bit at a 90-degree angle to drill parallel to the ground for thousands of feet. It took him more than 15 years of drilling holes all over the Barnett Shale to come up with the right mix of water and chemicals, but eventually he found a way to make it commercially viable to get at the methane in the tightly bound layers of shale. The new technology has turned the Barnett Shale into the largest producible reserve of onshore natural gas in the US. Other operators, borrowing from Mitchell's work, began drilling in Colorado, North Dakota, Ohio, Pennsylvania and, most recently, California. More than 15 million Americans now live within a mile of an oil or gas well, 6 million of them in Texas.
The industry has been quick to publicise fracking's apparent benefits. Electricity and heating costs have dropped. The activity from the oil and gas sector has helped buoy up an ailing national economy and paid for new schools in country towns. Last October, the US produced more oil at home than it imported for the first time since 1995.
New evidence, however, has begun to emerge that fracking, while reducing coal consumption, is not significantly curtailing the greenhouse gas emissions that cause climate change.
Campaigners warn that fracking is binding the US even more tightly to a fossil-fuel future and deepening the risks of climate change. There have been stories from homeowners of fracking chemicals seeping into their drinking water, video footage of flames shooting out of kitchen taps because of methane leaks. Companies have been fined for releasing radioactive waste into rivers.
In north Texas, where Kronvall lives, the number of new oil and gas wells has gone up by nearly 800% since 2000. It's impossible to drive for any length of time without seeing the signs, even after the rigs have moved on elsewhere: the empty squares of flattened earth, the arrays of condensate tanks, the compressor stations and pipelines, and large open pits of waste water. Virtually no site is off limits. Energy companies have fracked wells on church property, school grounds and in gated developments. Last November, an oil company put a well on the campus of the University of North Texas in nearby Denton, right next to the tennis courts and across the road from the main sports stadium and a stand of giant wind turbines. In Texas, as in much of America, property owners do not always own the "mineral rights" – the rights to underground resources – so typically have limited say over how they are developed.
Kronvall moved from the Fort Worth area to the small farming town of Ponder – population: 1,400 – for the peace and quiet, and the affordable house prices; it also meant a fairly easy commute to her job at the survey research centre at the University of North Texas. Wesley and Beth Howard moved into the Remington Park neighbourhood in the same year, two doors down, after making a similar calculation. It was close to where Beth works as a graphic designer at Texas Woman's University. Wesley, 41, a support engineer at IBM, works from home. The neighbourhood was still only partially built, but the developers said they were planning 150 new homes, a park and walking trails on the meadow behind their house. "This was the first home we had together," Wesley says. "We looked at being here for a good couple of decades. It was our expectation and our hope that this would grow and property values would improve and services would come up."
In February 2011, Beth, 31, had just found out she was pregnant when the couple noticed some wooden stakes with fluttering bright plastic strips had gone up in the meadow behind their home.
Kronvall had seen them, too, and assumed workers were staking out cul-de-sacs for the next phase of homes. She was away at a work conference in May 2011 when she got a call from another neighbour: crews had arrived with heavy earth-moving equipment. The meadow was about to be drilled for a well.
None of the neighbours received any official notice, either from the energy company or the town authorities. "The law at the time didn't require them to tell us or give any public notice or anything," Wesley says. "They could just spring it on us as a surprise, and so they did." At that time, Texas law did not require companies to disclose which chemicals they were using to frack the well. Residents say that, to this day, none of them has any idea, though there is now a voluntary chemical disclosure registry at fracfocus.org.
The crews proceeded to flatten the earth and install a 200ft red and white drilling tower that loomed high above their homes. Convoys of articulated lorries rumbled down the main road. "It was terrible," Kronvall says. "There was a lot of banging and clanging. The number of trucks was just phenomenal, and the exhaust, the fumes in the air, it was 24/7."
She says the activities on the other side of her fence deposited a layer of white powder on her counter tops. The sound of the crew shouting into megaphones invaded her bedroom. Bright lighting pierced her curtains and made it difficult to sleep. The rumble of trucks and equipment rattled the glasses in her cupboard, and the smell – an acrid blend of chemicals – was all-pervasive.
"My wife was pregnant the whole time the rig was there," Wesley says. There was the din of diesel generators belching soot, and a nauseating mix of chemicals competing with the aroma of dinner. The noise and smells penetrated to the next street over, where Christina Mills lives. Like the Howards and Kronvall, Mills, 65, was attracted to Ponder because of its sleepiness, and bought the fourth house built in the entire development when she moved to the town in 2001. "But when that derrick was up, you would have thought you were in Las Vegas," she says, "and I live one street over."
Devon Energy Corporation, the firm drilling behind their homes, did install a sound curtain to try to buffer the noise. Devon – which bought out George Mitchell and has become one of the biggest operators in the extraction of shale gas – says it is committed to supporting residents. "We are always working to find new and better ways to do what we do with the smallest possible impact that we can have on our neighbours," says Tim Hartley, a Devon spokesman. "Wherever we are, we want to have a healthy, safe, best-in-class operation, so we are committed to that and we have delivered that in the Barnett Shale area for many years."
The curtain did little to muffle the sound or reduce the other effects of fracking, say residents. The Howards' baby, Pike, arrived several weeks early. The couple say there is no way of knowing whether that was connected to the fracking, but they were very nervous about exposing him to possible chemicals from the process. "He was in really good health, but he was still a newborn," Wesley says. "When you can smell diesel exhaust and you have got other unusual odours, and all the things you don't know about what is going on with industrial stuff, it can be stressful. We didn't know what we were breathing in at any given time, and he was breathing it, too. It was what made his homecoming so stressful."
Two doors down, Kronvall says, her eyes watered constantly when she was at home, stopping only after she had been at work for an hour or two. As well as bouts of nausea and low, throbbing headaches, there was blood when she blew her nose. "I had nosebleeds pretty much throughout the entire process," she says.
Devon says it is not aware of any complaints about health problems suffered after it began its activities at Remington Park, though company representatives attended public meetings from 2011, and were accused by residents of being dismissive of health concerns. In response, Hartley has said, "It would be inappropriate for us to publicly discuss asserted claims."
As well as struggling with the noise and smells, Christina Mills says, there was the dust. One morning she found a gritty white powder all over her car, so she stopped at a car wash on the drive to work. "I went there to wash the stuff off, and the black paint came off with it," she says, still shocked at the memory. "It took the paint off my car."
The three neighbours all tried to stop the fracking, or at least get compensation. They sought legal advice and appealed to the town authorities and state environmental regulators. Inspectors for the Texas environmental regulator came out to Kronvall's home, commiserated about the smell and collected air samples, only to report back weeks later that they were unable to detect dangerous emissions.

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Tuesday, November 5, 2013

A method of storing harmful greenhouse gases by injecting them below ground has likely triggered a series of earthquakes in Texas


SHAKE AND BLOW

Below-ground gas injection linked to Texas quakes



by Staff Writers Washington (AFP) Nov 04, 2013 A method of storing harmful greenhouse gases by injecting them below ground has likely triggered a series of earthquakes in Texas, some larger than magnitude 3, a US study said Monday.
The findings in the Proceedings of the National Academy of Sciences mark the first time that carbon storage has been linked to temblors ranging from 3.0 to 4.4 in severity.
Researchers warned last year in the same journal that carbon capture and storage risked causing earthquakes, but there had been no direct evidence of such quakes until now.
The study focused on seismic activity in petroleum fields in Scurry and Kent Counties in northwest Texas, known as the Cogdell and Kelly-Snyder oil fields.
A process called water flooding was used in the Cogdell field to boost oil production from 1957 to 1982, and previous research has found that the practice caused small quakes in the area from 1975 to 1982.
More recently, methane and CO2 have been injected into the oil field at high volumes, said the research by Wei Gan and Cliff Frohlich at The University of Texas at Austin's Institute for Geophysics.

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