During the process of reconnaissance, exploitation, transportation and deposit, a large area around the oil field suffered from serious pollution.
在石油的勘察、开采、运输以及储存过程中，油田周围大面积土壤都受到严重的污染。
The pollution produced in the process of oil exploitation, refining, transporting and waste oily water draining has become an important resource to soil contamination.
石油的开采、冶炼和运输过程的污染和泄漏及含油废水的排放等已成为土壤污染的重要来源。
During the oil exploitation and the process of producing, a great quantity of oily sludge will be produced.
在石油开采及加工过程中，会产生大量的废弃含油污泥。
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