Seismic searches for offshore oil and gas are back in play
By Coastal Review Online on June 19, 2017
A ship tows an airgun array. (Bureau of Ocean Energy Management)
Seismic testing in search of oil and gas resources off the North Carolina coast is once again on the table.
Last week, the National Marine Fisheries Service proposed to issue five permits that would allow the oil and gas industry to conduct seismic surveys for oil and natural gas off the East Coast from the New Jersey/Delaware border to central Florida.
The action follows President Trumps executive order of April 28 reversing the Obama administrations mandate to permanently protect large portions of the Atlantic and Arctic Ocean from offshore drilling.
Interior Secretary Ryan Zinke signed an order May 10 that rescinded the denial in January of permit applications from six seismic testing companies aiming to conduct surveys in the Mid- and South-Atlantic Outer Continental Shelf. The companies had applied to the Bureau of Ocean Energy Management for the permists to conduct geological and geophysical, or G&G, activities off the East Coast.
That decision underestimated the benefits of obtaining updated G&G information and ignored the conclusions of BOEMs Atlantic G&G Programmatic Environmental Impact Statement and Record of Decision, which showed that no significant impacts are expected to occur as a result of these seismic surveys, an Interior Department statement said.
Former BOEM Director Abigail Ross Hopper, however, in denying the applications expressed concerns about the potential harmful effects of seismic testing on marine mammals.
Seismic testing uses air guns towed behind ships to send sonic waves that penetrate the ocean floor. How those waves are reflected from the bottom gives hints to the location and extent of oil or natural gas deposits below the surface.
Seismic operations are controversial because the use of soundmay disturb the normal behavioral patterns of marine mammals.
As far as the impact goes, the chances of an animal being outright killed by seismic air gun arrays are slim, said Doug Nowacek, a professor at the Duke Marine Lab and one of the worlds leading experts on marine mammals. The effects that we worry about mostly is producing sound in their environment and thats the sensory mode they use.
Seismic air gun blasts create background noise, making it harder for marine mammals to hear each other, their young and predators. It might also cause physiological distress, altering the animals migration patterns, feeding and even reproduction.
The Atlantic Ocean hosts about 30 kinds of mammals. They include humpback and North Atlantic right whales and dolphins. Sea turtles could also be affected by airguns.
Seismic testing companies mainatai that mitigation measures are in place to reduce the effects on marine mammals.
The Trump administration has directed BOEM to develop a new five-year program for offshore oil and gas exploration, though it is unclear how long the permitting review process may take.
Under the executive order from the president, he did ask that we streamline the process or find ways to streamline, said Connie Gillette, BOEMs chief of public affairs. I think its not unreasonable to say that it could be a year or two years. Theres multiple things that have to happen. It just takes a while.
Before applications get the all-clear they must be approved by the National Oceanic and Atmospheric Administration.NOAAs National Marine Fisheries Service reviews proposed seismic activities for incidental takes the inadvertent harming, killing, disturbance of wildlife expected during such testing.
Permits and authorizations for the take of a protected species are required under the Marine Mammal Protection Act and the Endangered Species Act, the future of which is uncertain under the current administration.
Incidental harassment authorizations, or IHAs, will be released, and the public will have 30 days to comment.
IHAs typically contain a variety of mitigation measures.
Some of those hopefully should be time-area closures, including Cape Hatteras, Nowacek said.
He describes this area where, in a typical day, you can expect to see four to five different species of whales, various sea turtle species and hammerhead sharks, as the marine equivalent of the Serengeti.
Environmental groups, including Oceana, which has been a leader in campaigning against seismic testing, have begun again to rally in opposition to prospective seismic testing in the Atlantic.
A representative with the American Petroleum Institute did not respond to a request for comment.
International Association of Geophysical Contractors President Nikki Martin lauded the Trump administrations decision to reopen permit application reviews.
Offshore seismic surveys have a long history of providing an accurate assessment of our nations oil and natural gas resources in an environmentally safe manner, critical to informing an effective national energy strategy and future OCS leasing decisions and plans, Martin stated.
The IAGC represents more than 125 G&G companies.
The industry defends offshore energy exploration methods, saying theres no scientific evidence that links the sound from air gun blasts to the deaths of whales and other marine life.
Industry officials argue that existing G&G survey data, collected more than 30 years ago, is outdated.
In her directive to deny seismic testing permit applications, Hopper wrote that there are currently moves to develop quieting technology for seismic surveys. BOEM in 2014 hosted a workshop that including government, industry, environmental groups and researchers to gain a better understanding of these emerging technologies.
The most promising alternative to airguns appears to be marine vibroseis technology, Hopper wrote.
Vibroseis reduces the loud shot of air gun surveying by spreading the energy used to create the sound over a longer duration.
The economic feasibility of this technology remains to be proven and the potential environmental impacts tested, Hopper wrote. There is no silver bullet. However, by engaging industry and the regulators, I expect technologies will be developed that can produce data that is commensurate to that being produced by currently available airgun seismic survey techniques, but with much less environmental impact.
Such technology should absolutely be part of the equation, Nowacek said. I think it would be irresponsible for BOEM and NMFS to not evaluate the new technology like vibroseis. What people need to understand is that its not just a one-time thing. They go out there and, if they find some areas that look promising, theyre going to want to shoot seismic every three to five years.
The G&G companies that have applied to conduct seismic testing in the Atlantic would be overlapping the same test areas, particularly off the coast of Cape Hatteras, he said.
Why dont we just have one survey and then everyone buys the data as they need it? Nowacek asked. That is what we mean by wise use of resources while mitigating the impacts to the environment.
The rest is here:
Seismic searches for offshore oil and gas are back in play - The Outer Banks Voice
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