双材料支承的Winkler梁的变形分析

Deformation Analysis For Winkler's Beam Continuously - Supported by Bimaterial

根据大庆油田现场的调查 ,泥岩层吸水蠕变、地层滑动是引起套管损坏的重要原因之一 .因而 ,提出了井体的“分段连续支承梁模型” .通过对该模型的计算与分析 ,研究了泥岩层的支承刚度的减小对地层界面处的载荷分配比例以及井体变形与内力分布的影响 .分析结果表明 :随着泥岩层水量增加 ,支承刚度的减小 ,套管的变形增大从而造成套管的破坏 。

The on_site investigutions at DaQing, oil fields indicated that the creep and gliding of mud_rock layer are the main coiuse for casing_failures. The influence of decrease of mud_rock supporting rigidity upon the load_distribution proportion at the interface and upon the internal force and the deformation of well body is studied through computation and analysis of the beam model continuously supported. The analysis result showned that as the water content of mud_rock increases, supporting rigidity decreases and deformation of casing increases, which causes the casing failure.