After the oil operations, pipelines often appear oily, scale and iron oxides phenomenon.

油井作业结束后，油管常常出现沾满油污、水垢和铁氧化合物的现象。

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Shell is the largest field operator in Nigeria, and accounts for about half of the country's oil operations.

壳牌公司是尼日利亚最大的油田经营者，约占该国石油业的一半。

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Supply concerns were amplified after French oil giant Total said it has started to shut down its oil operations in Libya.

法国石油巨头To tal说，它已经开始关闭其在利比亚的石油业务，这使得供应的担忧被放大。

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Then Anderson dismembered the company, selling the casinos and oil operations to other entities he controlled.

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Six months later Ecuadorians elected Correa, who, among other things, has busied himself trying to vacuum up the "windfall profits" of the remaining private oil operations.

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But many of the city's oil operations have been controversial.

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