In 2010 the Deepwater Horizon oil spill released an estimated 4.2 million barrels of oil into the Gulf of Mexico – the largest offshore spill in U.S. history. The spill caused widespread damage to marine species, fisheries and ecosystems stretching from tidal marshes to the deep ocean floor.
Emergency responders used multiple strategies to remove oil from the Gulf: They skimmed it from the water’s surface, burned it and used chemical dispersants to break it into small droplets. However, experts struggled to account for what had happened to much of the oil. This was an important question, because it was unclear how much of the released oil would break down naturally within a short time. If spilled oil persisted and sank to the ocean floor, scientists expected that it would cause more extensive harm to the environment.
Before the Deepwater Horizon spill, scientists had observed that marine bacteria were very efficient at removing oil from seawater. Therefore, many experts argued that marine microbes would consume large quantities of oil from the BP spill and help the Gulf recover.
In a recent study, we used DNA analysis to confirm that certain kinds of marine bacteria efficiently broke down some of the major chemical components of oil from the spill. We also identified the major genetic pathways these bacteria used for this process, and other genes, which they likely need to thrive in the Gulf.
Altogether, our results suggest that some bacteria can not only tolerate but also break up oil, thereby helping in the cleanup process. By understanding how to support these natural occurring microbes, we may also be able to better manage the aftermath of oil spills.
Finding the oil-eaters
Observations in the Gulf appeared to confirm that microbes broke down a large fraction of the oil released from BP’s damaged well. Before the spill, waters in the Gulf of Mexico contained a highly diverse range of bacteria from several different phyla, or large biological families. Immediately after the spill, these bacterial species became less diverse and one phylum increased substantially in numbers. This indicated that many bacteria were sensitive to high doses of oil, but a few types were able to persist.
We wanted to analyze these observations more closely by posing the following questions: Could we show that these bacteria removed oil from the spill site and thereby helped the environment recover? Could we decipher the genetic code of these bacteria? And finally, could we use this genetic information to understand their metabolisms and lifestyles?
To address these questions, we used new technologies that enabled us to sequence the genetic code of the active bacterial community that was present in the Gulf of Mexico’s water column, without having to grow them in the laboratory. This process was challenging because there aremillions of bacteria in every drop of seawater. As an analogy, imagine looking through a large box that contains thousands of disassembled jigsaw puzzles, and trying to extract the pieces belonging to each individual puzzle and reassemble it.
We wanted to identify bacteria that could degrade two types of compounds that are the major constituents of crude oil: alkanes and aromatic hydrocarbons. Alkanes are relatively easy to degrade – even sunlight can break them down – and have low toxicity. In contrast, aromatic hydrocarbons are much harder to remove from the environment. They are generally much more harmful to living organisms, and some types cause cancer.
We successfully identified bacteria that degraded each of these compounds, and were surprised to find that many different bacteria fed on aromatic hydrocarbons, even though these are much harder to break down. Some of these bacteria, such as Colwellia, had already been identified as factors in the degradation of oil from the Deepwater Horizon spill, but we also found many new ones.
This included Neptuniibacter, which had not previously been known as an important oil-degrader during the spill, and Alcanivorax, which had not been thought to be capable of degrading aromatic hydrocarbons. Taken together, our results indicated that many different bacteria may act together as a community to degrade complex oil mixtures.
Neptuniibacter also appears to be able to break down sulfur. This is noteworthy because responders used 1.84 million gallons of dispersantson and under the water’s surface during the Deepwater Horizon cleanup effort. Dispersants are complex chemical mixtures but mostly consist of molecules that contain carbon and sulfur.
Their long-term impacts on the environment are still largely unknown. But some studies suggest that Corexit, the main dispersant used after the Deepwater Horizon spill, can be harmful to humans and marine life. If this proves true, it would be helpful to know whether some marine microbes can break down dispersant as well as oil.
Looking more closely into these microbes' genomes, we were able to detail the pathways that each appeared to use in order to degrade its preferred hydrocarbon in crude oil. However, no single bacterial genome appeared to possess all the genes required to completely break down the more stable aromatic hydrocarbons alone. This implies that it may require a diverse community of microbes to break down these compounds step by step.
Back into the ocean
Offshore drilling is a risky activity, and we should expect that oil spills will happen again. However, it is reassuring to see that marine ecosystems have the ability to degrade oil pollutants. While human intervention will still be required to clean up most spills, naturally occurring bacteria have the ability to remove large amounts of oil components from seawater, and can be important players in the oil cleanup process.
To maximize their role, we need to better understand how we can support them in what they do best. For example, adding dispersant changed the makeup of microbial communities in the Gulf of Mexico during the spill: the chemicals were toxic to some bacteria but beneficial for others. With a better understanding of how human intervention affects these bacteria, we may be able to support optimal bacteria populations in seawater and reap more benefit from their natural oil-degrading abilities.
Postdoctoral Fellow, University of Texas at Austin
Assistant Professor of Marine Science, University of Texas at Austin
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The 9th edition of the Abu Dhabi International Petroleum Exhibition and Conference (ADIPEC) Awards, hosted by the Abu Dhabi National Oil Company (ADNOC), is now open for submissions.
In this fourth industrial age it is technology, innovation, environmental leadership and talented workforces that are shaping the companies of the future.
Oil and gas is set to play a pivotal role in driving technology forward, and at this year’s ADIPEC Awards emphasis is placed on digitalisation, research, transformation, diversity, youth and social contribution, paving the way towards a brighter tomorrow for our industry.
Hosting the ADIPEC Awards is one of the world’s leading energy producers, ADNOC, a company exploring new, agile and flexible ways to build its people, technology, environmental leadership and partnerships, while enhancing the role of the United Arab Emirates as a global energy provider.
Factors which will have a prominent influence on the eventual decisions of the distinguished panel of jury members include industry impact, sustainability, innovation and value creation. Jury members have been carefully selected according to their expertise and knowledge, and include senior representatives from Baker Hughes, a GE Company, BP UAE, CEPSA Middle East, ENI Spa, Mubadala Petroleum, Shell, Total and Weatherford.
Chairperson of the awards is Fatema Al Nuaimi, Acting CEO of ADNOC LNG, who says: “At a time when the industry is looking towards an extremely exciting future and preparing for Oil &Gas 4.0, the awards will recognise excellence across all its sectors and reward those who are paving the way towards a successful and sustainable future.”
Ms Al Nuaimi, continues: “we call upon our partners across the globe to submit their achievements in projects and partnerships which are at the helm of technical and digital breakthroughs, as well as to nominate the next generation of oil and gas technical professionals, who will spearhead the ongoing transformation of the industry.
These awards are recognising the successes of those companies and individuals who are responding in the most innovative and creative manner to the global economic and technological trends. Their contribution is pivotal to the development of our industry and to addressing the continuous growth of the global energy demand. “
Christopher Hudson, President of the Energy Division, dmg events, organisers of ADIPEC, says: “With ADNOC as the host and ADIPEC as the platform for the programme, the awards are at the heart of the worldwide oil and gas community. With its audience of government ministers, international and national oil companies, CEOs and other top global industry influencers, the ADIPEC Awards provide the global oil and gas community the perfect opportunity to engage, inspire and influence the workforce of the future.”
Entries can be submitted until Monday 29th July for the following categories:
Breakthrough Technological Project of the Year
Breakthrough Research of the Year
Digital Transformation Project of the Year
Social Contribution and Local Content Project of the Year
Oil and Gas Inclusion and Diversity Company of the Year
Young ADIPEC Technical Professional of the Year
A shortlist of entries will be announced in October and winners will be revealed on the first day of ADIPEC 2019, Monday 11th November, St. Regis Saadiyat Island, Abu Dhabi.
Held under the patronage of the President of the United Arab Emirates, His Highness Sheikh Khalifa Bin Zayed Al Nahyan, and organised by the Global Energy Division of dmg events, the Abu Dhabi Petroleum International Petroleum Exhibition and Conference (ADIPEC) is the global meeting point for oil and gas professionals. Standing as one of the world’s leading oil and gas events. ADIPEC is a knowledge-sharing platform that enables industry experts to exchange ideas and information that shape the future of the energy sector. The 22nd edition of ADIPEC will take place from 11th-14th November 2019, at the Abu Dhabi National Exhibition Centre (ADNEC). ADIPEC 2019 will be hosted by the Abu Dhabi National Oil Company (ADNOC) and supported by the UAE Ministry of Energy & Industry, Department of Transport in Abu Dhabi, the Abu Dhabi Chamber of Commerce and Industry, Masdar, the Abu Dhabi Future Energy Company, Department of Culture and Tourism - Abu Dhabi, the Abu Dhabi Department of Education and Knowledge (ADEK). dmg events is committed to helping the growing international energy community.
Source: U.S. Energy Information Administration, based on World Input-Output Database
Note: Dollar values are expressed in 2010 U.S. dollars, converted based on purchasing power parity.
The industrial sector of the worldwide economy consumed more than half (55%) of all delivered energy in 2018, according to the International Energy Agency. Within the industrial sector, the chemicals industry is one of the largest energy users, accounting for 12% of global industrial energy use. Energy—whether purchased or produced onsite at plants—is very important to the chemicals industry, and it links the chemical industry to many parts of the energy supply chain including utilities, mines, and other energy product manufacturers.
The chemicals industry is often divided into two major categories: basic chemicals and other chemicals. Basic chemicals are chemicals that are the essential building blocks for other products. These include raw material gases, pigments, fertilizers, plastics, and rubber. Basic chemicals are sometimes called bulk chemicals or commodity chemicals because they are produced in large amounts and have relatively low prices. Other chemicals—sometimes called fine or specialty chemicals—require less energy to produce and sell for much higher prices. The category of other chemicals includes medicines, soaps, and paints.
The chemicals industry uses energy products such as natural gas for both heat and feedstock. Basic chemicals are often made in large factories that use a variety of energy sources to produce heat, much of which is for steam, and for equipment, such as pumps. The largest feedstock use is for producing petrochemicals, which can use oil-based or natural-gas-based feedstocks.
In terms of value, households are the largest users of chemicals because they use higher value chemicals, which are often chemicals that help to improve standards of living, such as medicines or sanitation products. Chemicals are also often intermediate goods—materials used in the production of other products, such as rubber and plastic products manufacturing, agricultural production, construction, and textiles and apparel making.
Source: U.S. Energy Information Administration, WEPS+, August 2018
Note: Dollar values are expressed in 2010 U.S. dollars, converted based on purchasing power parity.
The energy intensity of the basic chemicals industry, or energy consumed per unit of output, is relatively high compared with other industries. However, the energy intensity of the basic chemicals industry varies widely by region, largely based on the chemicals a region produces. According to EIA’s International Energy Outlook 2018, Russia had the most energy-intensive basic chemicals industry in 2015, with an average energy intensity of approximately 98,000 British thermal units (Btu) per dollar, followed by Canada with an average intensity of 68,000 Btu/dollar.
The Russian and Canadian basic chemicals industries are led by fertilizers and petrochemicals. Petrochemicals and fertilizers are the most energy intensive basic chemicals, all of which rely on energy for breaking chemical bonds and affecting the recombination of molecules to create the intended chemical output. These countries produce these specific basic chemicals in part because they also produce the natural resources needed as inputs, such as potash, oil, and natural gas.
By comparison, the energy intensity of the U.S. basic chemical industry in 2015 was much lower, at 22,000 Btu/dollar, because the industry in the United States has a more diverse production mix of other basic chemicals, such as gases and synthetic fibers. However, EIA expects that increasing petrochemical development in the United States will increase the energy intensity of the U.S. basic chemicals industry.
The United States exports chemicals worldwide, with the largest flows to Mexico, Canada, and China. According to the World Input-Output Database, U.S. exports of all chemicals in 2014 were valued at $118 billion—about 6% of total U.S. exports—the highest level in decades.
The threat of military action in the Middle East has gotten more intense this week. After several attacks on tankers that could be plausibly denied, Iran has made its first direct attack on a US asset, shooting down an unmanned US drone. The Americans say the drone was in international waters, while Iran claims that it had entered Iranian air space. Reports emerging out of the White House state the US President Donald Trump had authorised a military strike in response, but pulled back at the last minute. The simmering tensions between the two countries are now reaching boiling point, with Iran declaring that it is ‘ready for war’.
Predictably, crude oil prices spiked on the news. Brent and WTI prices rose by almost US$4/b over worries that a full-blown war will threaten global supplies. That this is happening just ahead of the OPEC meeting in Vienna – which was delayed by a week over internal squabbling over dates – places a lot of volatile cards on the table. Far more than more than surging US production, this stand-off will colour the direction of the crude market for the rest of 2019.
It started with an economic war, as the Trump administration placed increasingly tight sanctions on Iran. Financial sanctions came first, then sanctions on crude oil exports from Iran. But the situation was diffused when the US introduced waivers for 8 major importers of Iranian crude in November 2018, calming the markets. Even when the waivers were not renewed in April, the oil markets were still relatively calm, banking on the fact that Iran’s fellow OPEC countries would step in to the fill the gap. Most of Iran’s main clients – like South Korea, Japan and China – had already begun winding down their purchases in March, reportedly causing Iran’s crude exports to fall from 2 mmb/d to 400 kb/d. And just recently, the US also begun targeting Iranian petrochemical exports. Between a rock and a hard place, Iran looks seems forced to make good on its threats to go to war in the strategic Straits of Hormuz.
As the waivers ended, four tankers were attacked off the coast of Fujairah in the UAE in May. The immediate assumption was that these attacks were backed by Iran. Then, just a week ago, another two tankers were attacked, with the Americans showing video evidence reportedly show Iranian agents removing mines. But still, there was no direct connection to Iran for the attacks, even as the US and Iran traded diplomatic barbs. But the downing of the drone is unequivocally the work of the Iranian military. With President Donald Trump reportedly ‘bored’ of attempting regime change in Venezuela and his ultra-hawkish staff Mike Pompeo and John Bolton in the driver’s seat, military confrontation now seems inevitable.
This, predictably, has the oil world very nervous. Not just because the extension of the current OPEC+ deal could be scuppered, but because war will impact more than just Iranian oil. The safety of the Straits of Hormuz is in jeopardy, a key node in global oil supply through which almost 20 mmb/d of oil from Iraq, Saudi Arabia, Kuwait and the UAE flows along with LNG exports from the current world’s largest producer, Qatar. At its narrowest, the chokepoint in the Straits is just 50km from Iranian land. Crude exports could be routed south to Red Sea and the Gulf of Aden, but there is risk there too; the mouth of the Red Sea is where Iranian-backed Yemeni rebels are active, who have already started attacking Saudi land facilities.
This will add a considerable war risk premium to global crude prices, just as it did during the 1990 Gulf War and the 2003 invasion of Iraq. But more than just prices, the destabilising effects of a war could consume more than just the price of a barrel. If things are heading the way the current war-like signs are heading, then the oil world is in for a very major change very soon.
Historical crude price responses to wars in the Middle East