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Earth United States Science

Millions of Abandoned Oil Wells Are Leaking Methane, a Climate Menace (reuters.com) 153

More than a century of oil and gas drilling has left behind millions of abandoned wells, many of which are leaching pollutants into the air and water. And drilling companies are likely to abandon many more wells due to bankruptcies, as oil prices struggle to recover from historic lows after the coronavirus pandemic crushed global fuel demand, according to bankruptcy lawyers, industry analysts and state regulators. Reuters reports: Leaks from abandoned wells have long been recognized as an environmental problem, a health hazard and a public nuisance. They have been linked to dozens of instances of groundwater contamination by research commissioned by the Groundwater Protection Council, whose members include state ground water agencies. Orphaned wells have been blamed for a slew of public safety incidents over the years, including a methane blowout at the construction site of a waterfront hotel in California last year. They also pose a serious threat to the climate that researchers and world governments are only starting to understand, according to a Reuters review of government data and interviews with scientists, regulators, and United Nations officials. The Intergovernmental Panel on Climate Change last year recommended that U.N. member countries start tracking and publishing the amount of methane leaching from their abandoned oil and gas wells after scientists started flagging it as a global warming risk. So far, the United States and Canada are the only nations to do so.

The U.S. figures are sobering: More than 3.2 million abandoned oil and gas wells together emitted 281 kilotons of methane in 2018, according to the data, which was included in the U.S. Environmental Protection Agency's most recent report on April 14 to the United Nations Framework Convention on Climate Change. That's the climate-damage equivalent of consuming about 16 million barrels of crude oil, according to an EPA calculation, or about as much as the United States, the world's biggest oil consumer, uses in a typical day. The actual amount could be as much as three times higher, the EPA says, because of incomplete data. The agency believes most of the methane comes from the more than 2 million abandoned wells it estimates were never properly plugged.

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Millions of Abandoned Oil Wells Are Leaking Methane, a Climate Menace

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  • by Viol8 ( 599362 ) on Thursday June 18, 2020 @02:13AM (#60196364) Homepage

    Its has a half life in the atmosphere of only 9 years so the vast majority if that release from these old wells has already been converted to water and co2. Other long lived industrial greenhouse pollutants such as flourocarbons and sulphur hex a flouride are far more worrying IMO.

    • by dunkelfalke ( 91624 ) on Thursday June 18, 2020 @02:36AM (#60196402)

      First, half life of 9 years doesn't mean that after 18 years the stuff is completely gone. Second, it converts to CO2 which is also a greenhouse gas.

      • by h33t l4x0r ( 4107715 ) on Thursday June 18, 2020 @02:50AM (#60196428)
        I'm not sure what's doing more harm to this once magnificent world we live upon, ignorance, or apathy. And frankly, I don't know and I don't care.
        • Oh, I so wish I had mod points today. That was a good one.

      • So it wont be gone after 18 years? Noooo, say it ain't so! Well thanks for the heads up there Einstein.

        FYI CO2 is a far less powerful greenhouse gas than methane so CH4 being converted to CO2 makes a big difference.

      • Re: (Score:2, Insightful)

        The atmosphere contains about 5 billion tonnes of methane.

        If the half-life is 9 years, that means 300 million tonnes are added annually.

        So the 281000 tonnes mentioned in TFA is 0.1%.

        Perhaps we should be worried about the other 99.9%.

        • by AmiMoJo ( 196126 ) on Thursday June 18, 2020 @05:47AM (#60196674) Homepage Journal

          The problem with this calculation is that it assumed the ideal is 0 tonnes of methane in the atmosphere, and it's not. How much is this adding above the sustainable level is the question.

          • The problem with this calculation is that it assumed the ideal is 0 tonnes of methane in the atmosphere, and it's not. How much is this adding above the sustainable level is the question.

            So for context, let's calculate the average annual methane released into the atmosphere by America's largest swamp, the Florida Everglades.

            The Everglades today are ~5600 square kilometers [intechopen.com], 90% of which are rich peat bogs. The median rate of methane release from rich peat is 48 grams C per square meter per year [ufl.edu], 80% of which is oxidized before it reaches the surface of the water.

            5600 km^2 * 0.9 * 48 g C/m^2 * 0.2 = 48,384 tonnes per year, naturally emitted methane plus 193,536 tonnes per year of carbon diox

      • by Dunbal ( 464142 ) *
        No, usually the stuff is mostly gone after 5 half-lives. So 45 years.
      • Its has a half life in the atmosphere of only 9 years so the vast majority if that release from these old wells has already been converted to water and co2.

        First, half life of 9 years doesn't mean that after 18 years the stuff is completely gone. Second, it converts to CO2 which is also a greenhouse gas.

        But this is an ongoing leak of methane into the atmosphere, which nobody is going to stop because nobody really cares about non-producing wells.

        So it doesn't "go away" with a half life of 9 years: it's constantly being replenished.

    • by Sique ( 173459 )
      Yes and no. Yes, the half life of Methane in the atmosphere is short (it's even shorter than the 9 years you claimed). But if you constantly replenish it in the atmosphere, then the level won't go down. And because the oil wells in question often belong to companies which filed for bankruptcy, there is no one who will seal them, as there is no one who will pay for the sealing.
      • Indeed but this is not new. TFA is talking about the human history of wells. It's not like we are abandoning massive amounts of new leaky wells continuously pushing the greenhouse gas emissions up. At this point it's almost a baseline source of warming rather than an increasing one.

        I'd be more concerned about the groundwater contamination of this. The global warming angle is far less of an impact than farming or say setting on fire the things we got out of these wells in the first place.

        • by Sique ( 173459 )
          The number of oil wells has gone up in the last decades, and so has the number of oil wells which were abandoned. Thus we indeed have an increased amount of Methane put into the atmosphere by abandoned oil wells (in most active oil wells, the Methane is either captured for use, or burned).
          • by Viol8 ( 599362 )

            The 281K tons of methane emitted in 2018 needs to be put into context - man made activities emit 100 million tons of CO2 PER DAY.

      • Well it is going to need to fall on the Tax payers to pay for the sealing, because we tax payers didn't want to pay for the regulations and monitoring of these companies to make sure they were doing the right things while they were in business.

      • by Dunbal ( 464142 ) *

        But if you constantly replenish it in the atmosphere, then the level won't go down.

        Only if you're dumping a large amount into the atmosphere. Otherwise a steady state is reached over time, and it's a fraction of the amount you're adding plus whatever occurs naturally.

    • We might be better off just setting fire to each gas-emitting well. That means the gas will be emitted as CO2 right away.

    • by hey! ( 33014 )

      All of which is true, but it ignores the fact that methane is an extremely potent greenhouse gas, so much so that the net effect of a ton of methane emitted, over the course of the following century, is dozens of times greater than ton of CO2.

      The extremely long half life of CO2 means that it's like a ratchet; CO2 levels in our lifetime only go one way. But *methane* levels are something we can do something about in the short term. What's more methane *leaks* are emissions that aren't doing anything usefu

      • Decaying organic matter, for instance the leaves that fall each autumn, create methane as they decompose. To fix this problem, we must cut down all forests and seal the resultant wood waste in stainless steel tanks. Then sow all land with strong herbicides to prevent the creation of new organic matter.

        Alternately, we could judge relative risks and not act stupidly.

    • Translations: "LA LA LA!!!! Here is an unrelated scientific fact so to make us think that we don't have to worry about problems!"

    • What flourocarbons are we releasing these days? I mean technically we still are using them, just not the R-12 ones that were jacking up the ozone layer.
    • The half life of methane is somewhat irrelevant. The problem is that it is continuously leaking into the air. Nine years from now half of all the methane won’t be gone because new methane is being leaked. Nine years from there might be more methane from these wells as there may be more abandoned wells.
    • by gtall ( 79522 )

      Yes and no. Increased methane means the permafrost melts faster releasing more CO2. The increase in temperatures also cause more energy use in air conditioning. To the extent the grid is carbon based, yet more CO2.

  • by bradley13 ( 1118935 ) on Thursday June 18, 2020 @04:04AM (#60196542) Homepage

    Why do journalists have to exaggerate everything? "The U.S. figures are sobering" TFS then goes on to point out that the annual amount is equivalent to one day's usage of oil. So about 0.3% of oil usage, and excluding any other sources of CO2 or methane. Molehills...

    • Because that's what climate reporting is and has been since it became a thing. People didn't all switch to Amish commune life when they shouted about global warming so they have to make everything sound like an utter disaster. Is it cool that mines are being abandoned and leaking methane? No. Is an extra day's worth of it in the atmosphere catastrophic? Also no.
  • by c_g_hills ( 110430 ) <(chaz) (at) (chaz6.com)> on Thursday June 18, 2020 @04:11AM (#60196560) Homepage Journal
    Responsible governments would track down the money that was taken in profits and seize it for the purpose of correcting the mistakes that threaten our existence. But yet again, it will be the poorest that end up paying the most.
    • by johannesg ( 664142 ) on Thursday June 18, 2020 @05:29AM (#60196652)

      Responsible governments would track down the money that was taken in profits and seize it for the purpose of correcting the mistakes that threaten our existence. But yet again, it will be the poorest that end up paying the most.

      Genuine question: why does your chain of responsibility stop there? YOU bought that oil. You used it to power your car. You used it to ship food in large tracks to your local supermarket. The way I see it, you profited massively from all these things. So why shouldn't you (also) pay?

      Without consumers, without people buying oil for all sorts of things, I think it's safe to say that it would have been left in the ground. So first you wanted it, but now you want the person that you paid to get it for you to clean it up for free. Why aren't you paying for that as well?

      • Shouldn't that be priced into the product?

        But even if it isn't, the reality is that WE ARE. As citizens and taxpayers, we're the ONLY ones on the hook right now. I don't want oil companies to clean things up for free, I want the government to pass regulations that this shit is illegal (and it already sort of is) and then put a bunch of money in trust in case the company goes bankrupt, and then I want for the cleanup to be paid for. And if a company can't front that money or afford it, then the well should never be drilled.

        But the oil companies run lobby groups far more powerful than my vote and my letters, and so no matter what I actually want and where I think the responsibility lies or whether or not I'm willing to pay more for energy, it's irrelevant, because the laws are casually flouted or worked around or never put in place at all.

        Given the profits that the oil industry at large has accumulated over the years, I'd say that they priced in more than enough space to at least clean up their messes if we wanted them to; that gap between their costs and revenues never should have existed in the first place. We're asking for nothing 'for free', we're asking for debts to be paid.

    • by davecb ( 6526 ) <davecb@spamcop.net> on Thursday June 18, 2020 @05:31AM (#60196654) Homepage Journal

      As part of an effort to keep skilled oil workers working, the Canadian government's hiring them to close down abandoned wells properly. And the courts have ruled that their owners can't just sell them to a shell company that then goes bankrupt.

      I speculate the oil companies will soon find themselves paying the Government back, while it in turn is looking for people to employ and money to invest in wind, solar, pumped storage and batteries.

      • by caseih ( 160668 )

        As a land owner with several abandoned wells on my property (and my cousin has many on his), I'm definitely happy to see the government finally taking the orphan wells and orphan pipeline problem seriously. Conservative governments have never taken it seriously, despite our lobbying (a lot of rural land owners vote conservative; you'd think they'd listen).

        Besides the global environmental impact that this article mentions, there's also the issue of local land contamination. Abandoned pipelines, of which ther

      • I speculate the oil companies will soon find themselves paying the Government back, while it in turn is looking for people to employ and money to invest in wind, solar, pumped storage and batteries.

        Wind, solar, and storage will not be sufficient to meet our energy needs. We will also need hydro, geothermal, and (most of all) nuclear fission as well.

        We will also need a source of transportation fuels besides petroleum. That can be from synthesized hydrocarbons, which can be net zero carbon by using municipal and industrial waste, or CO2 from the air, as the source of carbon for the synthetic fuel. We can build electric commuter cars and trains but airplanes need kerosene to fly. We can propel large

    • Responsible governments would track down the money that was taken in profits and seize it for the purpose of correcting the mistakes that threaten our existence. But yet again, it will be the poorest that end up paying the most.

      Okay, so the government takes this money. Now, what assurances do we have that once the government has this money that it will go towards the intended goals of fixing the problem?

      You know the government collects taxes on gasoline and diesel fuel, no? This is called a "road tax", because it's supposed to fund the building and maintaining of the roads. How much of this money actually goes to fix roads? Or bridges? I seem to recall a couple bridges collapsing in my lifetime. These were not unknown issues

  • by gweihir ( 88907 ) on Thursday June 18, 2020 @04:38AM (#60196590)

    Only on a corporate level. I expect the only fix is to have anybody that wants to drill having to make a security deposit that covers fixing up their mess or at least get insurance that covers it. And then making sure the mess actually gets fixed. Probably need to make a business out of that fixing activity.

    • I think someone did make a business out of it, just after WWI. A guy named Erle Halliburton. I think Bechtel does it too.
      • Bechtel? I've heard of them before. After looking them up I recalled where. They were brought in on projects like the Hoover Dam, the Chernobyl New Confinement structure, the Watts Bar and Votgle nuclear power stations, several solar thermal power projects, the cleanup of burning oil wells in Kuwait, destruction of nerve gas and other chemical weapons collected from World War I to today, and in the cleanup of radioactive messes from the Manhattan Project. They are also responsible for many submarine nuc

    • As far as I know, that's already theoretically the case in many jurisdictions. The problem is that usually the deposit is too small, and the government is eager to bend over backwards to accommodate these small drilling companies in the name of jobs and the economy. At least, that's how it's been in Alberta. Regulators are so thoroughly in the pocket of the oil industry, nothing ever really changes.

  • by havana9 ( 101033 ) on Thursday June 18, 2020 @04:48AM (#60196602)
    The solution for the leaking methane could be to harvest it and use it go make electricity? There are methane-powered generators [www.totem.energy] made with a car gas engine linked with an alternator. These engiens could have the electronic fuel injection tuned to use biogas and other mixes instead the standard CNG used for automotive uses.
    • If there's enough coming out to make its capture and sale economically viable, why not?
    • The problem isn’t that there are technological barriers to capture the gas. The problem is that it’s cheaper for the companies that own them to do nothing than capture the gas. Converting it to electricity presents its own problems with the first being how do the transport electricity to the grid from remote wells. The second problem is that making more electricity will only drive the price of gas down further as there is less need for gas to make electricity.
    • Leaking methane is rarely leaking at rates which make it economical to compress or liquefy. That's ultimately the problem.

  • 16 million barrels of oil isn't even one day's supply for the US.
  • In my state, all the oil wells have a methane gas vent that is kept on fire to burn off the gas. Even when the well's pumps are temporary turned off for production reasons. When you drive through oil country at night, you see constellations of burning methane fires all around and ahead of you.
  • If the global CH3 emissions from old wells is equivalent to about 1/356th of what the US does in a day (less on leap years), I'm not all that concerned.

    That said, it is low-hanging fruit. We might as well make sure they're properly sealed, but while keeping the cost/benefit ratio firmly in mind.

  • There is no perfect energy source. Everything is a compromise. You don't like the methane released from natural gas wells? Okay then, provide an alternative.

    As it is now, or at least as of 2018 according to the pie chart I found at the Wikipedia link below, we get roughly 1/3rd of our energy in the USA from natural gas. What's supposed to replace that if we aren't drilling for more continuously?
    https://en.wikipedia.org/wiki/... [wikipedia.org]

    Also in that chart we will see about 1/3rd of our energy comes from petroleum. That last 1/3rd is split roughly equally between nuclear, coal, and renewable energy. If you believe coal and petroleum to be a problem then it's not a matter of replacing just 1/3rd of our energy needs with something more acceptable, it's now 2/3rds. Then we have the knuckleheads like Representative Ocasio-Cortez and Senator Sanders that don't like hydroelectric dams or nuclear power either. So, we've had at least 40 years of government incentives to get people to use more wind and solar energy and all we have to show for it is maybe meeting 10% of our total energy needs from wind and solar. When in fact it's really just wind because solar is a rounding error in comparison to everything else.

    So, what do you want?

    This is what I want. I want people to look at the numbers. Or, using the words of these knuckleheads, "look at the science" and come up with a solution that can actually work. We aren't going to get rid of natural gas any time soon, but we can at least create a path in which our needs for it will get lower year over year. Make a list of all the energy sources available to us today, rank them in two lists, one on the least CO2 emitted per energy output, and another by cost of the energy output. On those lists you will see nuclear fission, hydro, onshore wind, and geothermal come out on top. Since we must take into account the reality of the situation we will have to keep natural gas on the list of our future energy supply for the foreseeable future. Again, it's on the list but the plan is to make the contribution of natural gas to our energy supply lower every year.

    How can we replace petroleum fuels with our list of top five energy sources? By synthesizing hydrocarbon fuels. This is an existing technology, and has existed for over a century. We can improve on the technology and get the energy from our top five and then carbon for the process from the air to close the carbon loop. Closing the loop on this means no net CO2 added to the air.

    You don't like my plan? Fine, come up with your own. I want to see people talk about solutions that can actually work. Knuckleheads that keep talking about abandoning nuclear and hydro are not helping. There is no future in which we can keep our modern lifestyle and not use both nuclear and hydro.

    The future is onshore wind, hydro, geothermal, nuclear fission, and some natural gas to help us through the transition. Energy for transportation will be from synthesized hydrocarbons, some natural gas, electric commuter cars and trains, and large ships with nuclear power plants onboard. Solar power will continue to be within a rounding error in future contributions to our energy supply.

  • Here's an article I saw today that I believe to be relevant here.
    https://www.manhattancontraria... [manhattancontrarian.com]

    The point is that the government is as "addicted" to natural gas and petroleum as anyone. But then we hear, "We won't tax the oil and gas, we'll sue them for the money to pay for the damage they did!" If the money is going to the government then it's a distinction without a difference. This still creates a constant stream of revenue for the government from which it can draw. Shouldn't this money go towards

  • This is one of the most simply obvious things we should be fixing. We need to use every simple chance we have to help our odds of avoiding climate breakdown. Sealing the old wells is one obvious solution.

    Here's another. We should be burning that methane, harvesting that energy, to mitigate runaway climate change.

    Here's why. Methane may be short-lived in the atmosphere, but its effects are drastic. When it gets sequestered in ice form on the ocean floor, for example, a bit of greenhouse gas enough to cr

  • We have 3.2 million abandoned wells. In addition to sealing them, what else could they be used for? Heating/Cooling of homes. THis is esp. true in Texas where once a field is abandoned, they build large number of homes on these. By using these wells for HVAC, it could cut CO2 emissions in the building, electrical, and methane from the wells, all at once. In fact, some of these wells, might actually be used to provide nat gas to the home for BBQ, fireplace, kitchen ( but do not use for nat gas furnace).
    • by kenh ( 9056 )

      More than 3.2 million abandoned oil and gas wells together emitted 281 kilotons of methane in 2018, according to the data

      So if each well produces, on average, 281,000 tons/3,200,000 wells, or 0.088 tons of Methane per year(that's 176 pounds/methane per well, per year, or less than half a pound a day, on average), how large a community can such a well provide fuel for? You do realize these wells were capped/abandoned because they were not worth operating, right? The economics don't suddenly change when you plan to use the methane locally. I don't think I could run a home gas grill for 24 hours on a half-pound of fuel... [santaenergy.com]

  • The U.S. figures are sobering: More than 3.2 million abandoned oil and gas wells together emitted 281 kilotons of methane in 2018, according to the data, which was included in the U.S. Environmental Protection Agency's most recent report on April 14 to the United Nations Framework Convention on Climate Change. That's the climate-damage equivalent of consuming about 16 million barrels of crude oil, according to an EPA calculation, or about as much as the United States, the world's biggest oil consumer, uses in a typical day . The actual amount could be as much as three times higher, the EPA says, because of incomplete data. The agency believes most of the methane comes from the more than 2 million abandoned wells it estimates were never properly plugged.

    So this "crisis" is that in the US, over the course of one year, about one day's worth of crude oil consumption is leaked out of 2-3.2 million improperly capped abandoned oil wells? Seriously? If we properly capped every one of the 2-3.2 million abandoned oil wells the US carbon footprint would be reduced by 1/365th, or less than one-third of one percent? Is anyone arguing this is a significant difference, one-third of one percent?

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