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Politics have long skewed oil supply lines, but this year's confluence of events have bent the route from the well to the gas tank so far out of shape that West African oil is going to a refiner in Taiwan to make diesel for Brazilian truckers.
It is politics that have sent Siberian oil is on its way to Peru in a hitherto unchartered trade route, and made it profitable for Belgian chocolatiers to run vans with Indian-processed Colombian oil.
Markets are stretching to re-allocate supplies in the wake of four major events this year: Libya's civil war, rising Saudi output, the release of emergency oil stockpiles coordinated by the International Energy Agency and a payments dispute between India and Iran.
"Geopolitical events have triggered crazy distortions of oil flows at a global level," said Tony Nunan, a risk manager with Tokyo-based Mitsubishi Corp., who joined the company in 1987.
"The IEA release caused a secondary tsunami of unintended crude flows. In my career, I haven't seen anything like this."
Oil markets are withstanding the most enduring supply shock since the 2003 Iraq War, the loss of 1.3 million barrels per day (bpd) of Libyan oil exports, while absorbing the release of IEA oil. Most of the crude in the release was sold in the United States, displacing its more usual imports.
U.S. crude imports from West Africa that would have amounted to about 19 million barrels in August have been re-routed, Reuters calculations show, virtually halting shipments of Nigerian and Angolan crude to North America.
Europe will receive as much as 40 million barrels of crude from West Africa in August, up from about 28 million in July.
West African crude flows to Asia are also increasing after the IEA release improved arbitrage economics.
"The increasingly active involvement by consumer governments has deepened the politicization of the oil market," said London-based Barclays Capital oil analyst Amrita Sen.
"With the unrest in the Middle East and North Africa region this year proving to be a watershed of sorts, geopolitics is likely to play an even more important role in shaping the future of oil markets in the coming years."
This means long-standing arbitrage strategies may be at risk and new ones are being formed, while producers, refiners and consumers must cope with growing market swings. Oil price volatility in the second quarter surged to its highest level in more than two years.
Five large cargoes of Iraqi Basra Light crude, an unaccustomed guest in Europe, are heading to the continent in a rare development triggered by the IEA oil stocks release and a strengthening of Russian crude values.
The increase in U.S. shale oil production feeding into the landlocked Cushing hub in Oklahoma, the inauguration of a pipeline pumping 300,000 bpd of Siberian high-quality crude into northern China and Japan's earthquake have also been key factors in changing arbitrage flows this year.
But the most intense reshuffling involves disruption-stricken Africa and Europe, top crude stockpile holder the United States, the world's top-producers in the Middle East and the fastest-growing market in China.
Asia is key as an intermediary in the new pattern because of the surplus it holds in top grade refining capacity. Saudi Arabia has increased production of lower quality crude, which requires more sophisticated processing to turn into fuels, partly compensating for the top-quality oil that Libya sent to European refiners.
"There is a push-out process where refineries that can take Saudi crude have to ramp up, so the arbitrage isn't just crude, it has to go through the whole refining system," Nunan said.
The rise in Mediterranean supplies following the IEA release is re-opening export opportunities to Asia, with high-quality Algerian crude sailing to Indonesia again. This marks a turnaround from the deficit of light and sweet crude that prevailed in Europe for most of the first half of the year.
As West and North African crude returns to Asia, it is freeing up Russian oil for export to the Americas. But with a saturated North American market after the IEA release, its usual destination, ESPO Blend crude pumped from East Siberia to the Pacific Ocean is looking for homes elsewhere.
ESPO is travelling through the Malacca Straits and Suez Canal to the Mediterranean, traders said, and diagonally across the Pacific Ocean to South America, both unprecedented flows.
And from the Americas to Asia, flows of lower-quality Colombian crude are increasing to India, which has the sophisticated refining capacity necessary to transform cheaper crude into high-value light oil products that are then shipped around the globe.
INDIA vs. IRAN
India is also coping with the imminent suspension of shipments of Iranian crude.
New Delhi has caved in to U.S. pressure to ditch a long-standing mechanism for payment of oil imports from Iran, which stopped allocating crude to Indian refiners for August. At stake is a crude flow of 400,000 bpd between OPEC's second-largest producer and Asia's third-largest consumer.
But the U.S.-led strategy to isolate Iran may be clashing against efforts to cap the oil price and safeguard a fragile global economic recovery, said John Vautrain, director at Purvin & Gertz energy consultants in Singapore.
"Now we've got this weird thing where at the same time we are trying to lower the price by releasing crude from emergency stockpiles, while we are doing things that could push it up by cutting flows," Vautrain said.
"It seems like they (the U.S.) have shot themselves in the foot again. If you manage to engineer a shortage, you are cutting supplies from a country and hurting the Indian and the world economies. It feels like a change of policy," Vautrain said, comparing it to a multi-year strategy to block Iran's gasoline imports.
Top exporter Saudi Arabia's unilateral decision to increase production this year after OPEC's failed meeting in June enraged Iran, as it also came on the heels of the kingdom's military intervention to stave off a Shiia uprising in Bahrain, a move strongly condemned by the Islamic Republic.
The Saudis this week approved sales of 3 million barrels of extra crude to India for August to make up for a loss of shipments from Iran.
"If India is only the nose of the camel in the tent, and we have more countries cutting off purchases and throwing the Iranians onto China's lap, then that may force Iran to cut production," Vautrain said.