Coal is of poor quality, while petroleum production is far below present needs.

煤的质量不好, 石油产量又远落后于目前的需要.

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It's an important problem of production in oil wells during petroleum production.

油井出砂是石油开采过程中遇到的重要问题之一.

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Work area of oil extraction is a primary unit in petroleum production.

采油工区是原油生产的一线单位.

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Industry: petroleum production and refining, food processing, light consumer goods, textiles.

工业: 原油制品与提炼, 食品加工, 轻工业产品, 纺织.

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Reservoir compaction and surface subsidence are a major concern in petroleum production.

石油开采过程中的油藏压实和地面沉陷是海上油田开发不容忽视的问题.

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Today, the rod pumping is the predominance mechanical recovery mode in world petroleum production.

抽油机井举升方式是目前油田应用最广泛的机械采油方式.

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The direct and indirect liquefaction technology can be used usually for petroleum production from coal.

煤制油通常有直接液化和间接液化,论述了煤的液化合成液体燃料的开发趋势和工业化状况.

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PAC flocculation was usually applied to the treatment of oil - bearing wastewater in petroleum production.

油田开发生产过程中产生和排放的含油废水含有多种污染物,严重污染了生态环境.

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