Announcement

Collapse
No announcement yet.

Bakken oil goes "boom" says US Gov't

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Bakken oil goes "boom" says US Gov't

    Ol' Warren won't be happy ….

    U.S. issues warning over Bakken-sourced oil

    Washington has issued a warning that crude oil originating from the Bakken region is more explosive than traditional oil, marking the first time since the Lac-Mégantic rail disaster that the U.S. government has acknowledged the dangers of shipping such volatile crude on trains.

    The warning comes three days after a train carrying Bakken oil derailed in rural North Dakota, causing massive explosions and forcing evacuations. It was the third fiery oil train accident in less than six months, beginning with the derailment in Lac-Mégantic, Que., on July 6 that killed 47 people and gutted the town.

    The U.S. Department of Transportation said it is conducting tests on oil from the Bakken region, which straddles North Dakota and parts of Manitoba and Saskatchewan, and is preparing to make changes to the way the rail and oil industries operate. In particular, the regulator will require crude producers and shippers to “degasify” risky oil before shipping it, which would mean stripping out highly combustible gases such as hydrogen sulfide, before shipping.

    The announcement follows a Globe and Mail investigation that found that oil originating from the Bakken area, which blew up when a train derailed in Lac-Mégantic, is lighter and more volatile than typical forms of crude because it carries potentially explosive elements, such as higher levels of hydrogen sulfide. Those elements can vaporize when being transported by train, making the cargo dangerous. The investigation also found that companies were not testing many of their oil shipments before sending them and had no idea how volatile the oil was.

    In its safety alert issued Thursday, the U.S. regulator said it is now investigating the gas content, corrosivity, toxicity, flammability “and certain other characteristics of Bakken crude oil.”

    The announcement echoes a similar change in Canada a few weeks ago. Canadian Transport Minister Lisa Raitt said she would declare oil from the Bakken – and similar forms of light crude – to be an unusually hazardous product. This specialized declaration, which Ottawa had balked at for nearly a decade, will ensure new safety measures will to be placed on oil shipments, and hopefully avert future disasters. The change was a result of The Globe’s investigation, Ms. Raitt said.

    Prior to the Lac-Mégantic disaster, oil was known to be flammable, but was not thought to be highly explosive. Since then, there have been two other explosive train derailments involving large shipments of Bakken crude on trains carrying up to 100 tankers. An oil train derailed in Alabama in November, causing explosions that witnesses said resembled mushroom clouds. And on Monday, a train derailed outside Casselton, N.D., also resulting in huge blasts and plumes of smoke that threatened the nearby town.

    The announcement, made by the Pipeline and Hazardous Materials Safety Administration (PHMSA) in Washington, comes as state officials in North Dakota, concerned about the negative press the Bakken industry was getting, were preparing to commission a study that would show that transporting crude by rail was safe. However, the U.S. federal regulator said it is now considering what “mitigating measures” may need to be taken “to ensure the continued safe transportation” of the oil.

    “Recent derailments and resulting fires indicate that the type of crude oil being transported from the Bakken region may be more flammable than traditional heavy crude oil,” the U.S. regulator said Thursday. “Based on preliminary inspections conducted after recent rail derailments in North Dakota, Alabama and Lac-Megantic, Quebec, involving Bakken crude oil,” the regulator said it would enforce rules that require oil shippers to “sufficiently degasify hazardous materials prior to and during transportation.”

    This is significant because crude oil historically hasn’t required such measures. However, the crude sent by rail that exploded in Lac-Mégantic, and in the other two derailments, appears to be far more susceptible to vaporization than traditional oil shipments. Such vaporization is believed to be the cause behind the massive explosions. The Globe has shown that in North Dakota’s booming oil sector, several companies had warned about problems with high vaporization and hydrogen sulfide in the months leading up to the Lac-Mégantic derailment. However, regulators were slow to act on those warnings.

    North Dakota is now the second-largest crude-producing state in the U.S., after Texas. However, due to a shortage in pipelines, roughly two-thirds of the crude it produces is shipped to refineries by rail. While oil was never shipped in mass quantities by rail, the practice has become common in the past three to four years, using trains consisting of 70, 80 and often 100 tanker cars.

    In an interview Wednesday, Casselton Mayor Ed McConnell told The Globe that, while no one was injured in this week’s derailment, the death toll could have doubled what it was in Lac-Mégantic if the oil train had erupted inside a city. He said perhaps the oil should be carried in pipelines only. “Maybe it is just too dang dangerous to transport above ground,” Mr. McConnell said. “Maybe it should be stuffed into a pipe.”

    http://www.theglobeandmail.com/news/...ticle16182584/

  • #2
    Re: Bakken oil goes "boom" says US Gov't

    Oil that burns violently. Imagine that!

    Back in the very early days of the oil industry many light oil fields produced crude that could be easily separated in stages in the field and part of the product (natural gasolines) could be put directly into the tanks of the cars of the day.

    Our Canadian oil sands crud(e) has less gas than your Aunt Minnie after the Christmas sherry. And since Obama shows no inclination to approve the Keystone pipeline, we'll just substitute it for the Bakken crude in these rail cars, send them south, and everything will be "safe" again. If the train derails just spread the spilled gunk around and roll it to make pavement.

    Seriously, I was looking at a Bakken associated field gas analysis last week and was struck by the incredibly high percentages of LPGs (propane and butane) and pentane+ constituents. I don't think I have ever seen anything like it in 37 years in this business. Those quantities indicate a highly volatile crude.

    The article mentions hydrogen sulphide (H2S). I don't know what the rail standards are, but the Canadian highway limitations for H2S in natural gas transported are maximum 2 ppm (parts per million) or 0.0002 percent, which is below pipeline standards. I would make an educated guess that 5 ppm, or less, is the rail standard. These are set not because H2S is likely to be the explosive agent at these very low concentrations (as implied in the article above), but because H2S is highly corrosive in the presence of just a little bit of water...and that in turn compromises the integrity of the tanker over time, which in turn becomes a potential public safety issue.

    If I had to make a guess, it is the high concentrations of very light hydrocarbons entrained in the oil, that evolve into the gas phase with agitation, that creates the explosive condition when allowed to be released to the air (inside the tank car the gas will be above the upper explosive limit, so it has to be diluted with air and have an ignition source to satisfy the explosive conditions). What I am describing is similar to the process that creates the volatile hydrocarbon gasses that you smell evolving from the liquid gasoline as you fill the tank in your car.

    The Bakken producers may need to install topping plants to stabilize the crude oil (remove the gasses and light, volatile hydrocarbons or "natural gasolines") before they rail it. Maybe they can use some of the road-tax-free light ends to fuel their field trucks
    Last edited by GRG55; January 04, 2014, 12:03 AM.

    Comment


    • #3
      Re: Bakken oil goes "boom" says US Gov't

      GR
      While your here...........whats your take on the Tanker Company like Frontline or unversile?

      They got KILLED over the last few years, any hope of return or are they "Dead Man walking"?
      Cheers
      Mike

      Comment


      • #4
        Re: Bakken oil goes "boom" says US Gov't

        Originally posted by Mega View Post
        GR
        While your here...........whats your take on the Tanker Company like Frontline or unversile?

        They got KILLED over the last few years, any hope of return or are they "Dead Man walking"?
        Cheers
        Mike
        No idea Mega. Most everything petroleum related is deeply cyclical. So the time to buy is generally when they are out of favour. But how long it takes to turn around and start making money in the tanker industry is not something I have any knowledge about. I would guess the tanker companies fluctuate on global economic growth rates (which have slowed down), import volumes (declining due to USA shale gas) and the size of the tanker fleet (new builds versus scrapping rates).

        Comment

        Working...
        X