Zichang oilfield is located in the eastern slope of Ordos basin.

子长油田位于鄂尔多斯盆地东部斜坡。

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In Yanchang oilfield, serious lost circulation often occur during drilling in Panlong and Zichang areas, directly affect drilling rate.

延长油矿管理局在蟠龙、子长等主生产区经常遇到严重漏失井，直接影响了钻井速度。

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The coking process of zichang gas coal in the new type of shaft furnace and furnace'e feature are described. The quality of products and economic benefits are analyzed.

论述了陕西省子长气煤在新型直立炉炼焦的工艺过程及炉型特点，分析了产品质量及经济效益。

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