出砂套管受力有限元分析  

THE FINITE ELEMENT ANALYSIS OF FORCE ABOUT SAND ENTRY CASING

作　　者：张建忠[1] 靳鹏菠 刘锋[3] 杨小亮[3] 任立斌[3] 

机构地区：[1]冀东油田公司钻采工艺研究院,河北唐山063000 [2]冀东油田公司勘探开发建设项目部,河北唐海063200 [3]冀东油田公司陆上油田作业区,河北唐海063200

出　　处：《新疆石油天然气》2011年第1期66-67,75,共3页Xinjiang Oil & Gas

摘　　要：油气井开采过程中,生产层段由于出砂将在套管外部附近形成空洞,破坏了套管的受力环境,套管外部失去支撑。由于上覆地层压力的作用,使套管在轴向压力作用下产生屈曲变形。本文用弹塑性有限元法建立了出砂段套管屈曲变形的有限元力学模型。根据此模型,分析了某出砂引起套损后,套管的形态;特定上覆层载荷下,发生屈曲的自由套管段长度。这些结果为预防套管损坏和屈曲变形提供了依据。in the process of oil and gas wells' exploitation,the production of the sand layer will lead to an empty hole near external casing,which will damage the environment of the casing,so the external casing will lose support.Because of overlying strata pressure,the casing will become buckling under pressure at the axial.In this paper,by elastic-plastic finite element method,finite element mechanical model of casing buckling of the sand entry is established.According to this model,we analyze the patterns of the casing caused by sand entry;in a particular load of oil overlying layer,the length of buckling free casing,these results provide a basis for the prevention from buckling and casing damage.

关 键 词：出砂 套管变形 有限元分析 

分 类 号：TE256[石油与天然气工程—油气井工程]