NPR's Michele Kelemen reports on this latest diplomatic squabble in an already tense relationship between the U.S. and a key oil supplier.
Crime is endemic and Chavez's chaotic management style has been blamed for a breakdown in infrastructure, particularly in the key oil industry.
Extensive damage wreaked on Gulf of Mexico oil refineries last week by Hurricane Katrina has spurred talk of spreading out the nation's key oil refineries.
Relations between the United States and Venezuela a key oil supplier have been frosty for years, with Washington and Caracas often trading insults.
Allegations of corruption were rife in those days, as key Oil Ministry positions were given to Fadila Party loyalists over more skilled candidates, and supplies of petroleum products sagged.
The Merc has agreed to be the exclusive electronic-trading post for Nymex's key oil, gas and gasoline contracts and, eventually, for the metals futures traded in Nymex's Comex division through 2016.
Turning to Saudi Arabia - a key oil supplier and another partner in the war on terror - it says there have been some gains, such as a conference on women's rights and creation of the first formal human rights group, but concludes: "The record of human rights abuses and violations... still far exceeds the advances".
The fourth key enhanced oil project is the Weyburn oilfield in Saskatchewan, which has been producing since 1954 and is considered to be one of the most prolific fields in Western Canada.
Third, transportation infrastructure plays a key role in oil pricing.
This, we think, could lead to a correction in key commodities like oil, copper, but even potentially precious metals, where a lot of people have been hiding, like gold and silver.
One key area is oil processing and gasoline distribution.
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As it is, Canada, Mexico and Venezuela already are the key suppliers of oil to the U.S. But middle eastern oil nations have gotten the U.S. into more than one tight spot on foreign policy matters.
The facility is key to pumping oil out of the fields, which accounted for close to half of Sudan's entire production of about 115, 000 barrels of oil per day before wells were shut down due to the conflict.
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Similarly, the rate of depletion in key sources of current oil supply is accelerating more rapidly than anticipated.
It all began last December when the European Union named him as "a key facilitator for Iranian oil deals and transferring oil related money".
The board positions and stake in Rosneft will give BP greater interaction with Rosneft CEO Igor Sechin, a key player in Kremlin oil policy.
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Mr Hayward rose to become head of exploration and production, a key role in any oil company, and was long identified as Lord Browne's likely successor.
ExxonMobil earlier in the decade had won a key battle against Russian oil companies by obtaining a production-sharing agreement, which gave it more protection against arbitrary tax increases.
Despite narrowly escaping capture and suffering a leg wound during a shootout with the Gestapo, he provided key information on an oil refinery and an underground V-1 rocket factory.
An old Remington manual was set up on the table and it refused to move when he hit the Tab key, the fresh oil on its parts turned to gum by the cold.
Double tops and double bottoms can often alert the investor to major turning points especially when they are observed in the weekly charts of a major market average or a key commodity like crude oil.
Those who see weaker prices next week said, while gold might be oversold in the short-term, the medium-term technical picture has turned negative and that could lead to weaker prices, even as geopolitical worries heat up, such as saber-rattling by Iran over possibly closing the Straits of Hormuz, a key shipping lane for oil transportation.
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Saudi Arabia is one of the key members of the OPEC oil cartel.
The country is key to western plans about oil pipelines in the region.
Suncor is one of the key players in the Canadian oil sands and production is expected to increase significantly going forward.
Last-minute changes to the constitution, and the deferral of some key decisions on federalism and oil revenues, were meant to placate Sunnis.
In light of this, it was his view that the British army should seize oil refineries and key installations at dawn on May 5, 1977.
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Yet, China is a key player in the global oil markets.
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One key: This time around oil prices have risen at a slower and more stable pace, says Hillard Huntington, director of the Energy Modeling Forum at Stanford University.
The Saudis hold the key to long-term oil prices since they are one of the few exporters--Kuwait and Abu Dhabi are the others--with the ability to increase production significantly.
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