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因质量和运费的差异,各类原油价格与基准油价(Marker Crude Price)之间的差额称为差价。在石油输出国组织内部,于1974至1978年的大部分时间里,各成员国都是以沙特阿拉伯腊斯塔努腊(或译塔努拉角)港装运的阿拉伯轻质原油(34°API)的价格为基准价,其他各类原油根据其质量(API度、含硫量、轻质馏分的收率等)和距销售市场远近,增减一定比例,如高出0.1API度,每桶油价增加3美分,总的差价范
Due to differences in quality and freight rates, the difference between various types of crude oil prices and the benchmark price (Marker Crude Price) is called the difference. Within the Organization of Petroleum Exporting Countries for most of 1974-1978, all member states were Arabian light crude (34 ° APIs) shipped in the port of Costa Rica or port of Tapura, Saudi Arabia, Of the price of the benchmark price of other types of crude oil according to its quality (API degree, sulfur content, yield of light fractions, etc.) and distance from the sales market, increase or decrease a certain percentage, such as higher than 0.1API degrees, oil price per barrel Increase 3 cents, the total price range