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本文在引证国内一些油田高压注水引起地层侧滑,致使套管挤扁、弯曲,甚至错断的原因后指出,由于地层单向侧压力的出现,改变了套管承受均布外压的原始受力状态,使套管的承载能力大幅度下降。并指出,目前没有一种套管强度能够抵抗这一破坏作用。因此,用增加套管壁厚或提高钢级的办法来解决这一问题是行不通的。现实的方法是严格防止高压水窜入这些易产生单向蠕动的地层。
This paper cites some domestic oilfield water injection caused by stratification, causing the casing squeezed flat, curved, or even the wrong reasons after the emergence of one-way side of the formation of pressure, changing the original casing to withstand uniform external pressure Force state, so that the carrying capacity of casing dropped significantly. And pointed out that at present there is no one kind of casing strength to resist this damaging effect. Therefore, to increase the casing wall thickness or increase the way to solve this problem will not work. The realistic method is to strictly prevent the high-pressure water from fleeing into the formations that are prone to unidirectional creep.