Yemen is the smallest oil producer in the Middle East and has begun to extract less.
Environmentalists have warned that even exploratory oil wells can disrupt fragile reef ecosystems, while the smallest oil spill could could have a devastating environmental impact.
The inquiry is the latest chapter in a fight between Unocal, one of the smallest oil companies, and many much larger oil companies about whether Unocal had the right to patent processes to make cleaner-burning fuels and whether the companies should be paying royalties on those patents.
Ecuador is the smallest oil producer in the Organization of the Petroleum Exporting Countries, yet oil sales account for about half of the country's income from exports and about a third of all tax revenues, according to the United States Energy Information Administration.
The smallest oil droplet sizes are reached at a back-pressure of ~30% of the inlet pressure, a value being in consensus to former experimental studies.
The smallest oil option on the New York Mercantile Exchange (a.k.a. the Nymex) is for 1,000 barrels, and a $59 March call expiring Feb. 15 was trading on Feb. 14 for $820.
