Abstract

Well yingke- 1 is an overpressured deep well with a depth of 6406m, which contains multilevel high pressure brine water layers and ultra-high pressure gas layers. Its formation pressure is high as much as 140~150Mpa. The well located at Yingjisha structure, southwest of Tarim basin with piedmont structure belt and abnormal ground stress. The paper describes briefly the drilling practice of Yingke-1 well, emphasizing the drilling difficulties and measures that taken. Also, key techniques that should be done in dealing with deep wells and ultra-deep wells under complicated situations in the future are identified in the paper.

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