研究了大港油田港东地区沙河街地层三种硬脆性泥页岩的水化坍塌机理。
This paper studies the hydration sloughing mechanism of three kinds of hard and brittle shales of Shahejie formation in Gangdong oilfield.
气体钻井由于其机械钻速快，能有效防止水敏性泥页岩坍塌，杜绝井漏。
The gas drilling technology is increasingly applied these days due to its high ROP, effective prevention of the cave-in of water-sensitive shales and the capability to eliminate lost circulations.
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