This paper studies the hydration sloughing mechanism of three kinds of hard and brittle shales of Shahejie formation in Gangdong oilfield.
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。
Calculation of practical data from oil fields demonstrates that formation sloughing pressure is dependent on deviation Angle and well azimuth.
对油田的实际资料进行计算表明，井壁坍塌压力与井斜度和井斜方位角有关。
Abnormal high formation pore pressure and sloughing stress exist in the south area of Junggar Basin, and mud making and composite ion contamination is also remarkable in this area.
新疆准噶尔盆地南缘地区安集海河组存在超高压、强造浆、强坍塌应力、复合离子污染等问题。
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