水力割缝套管应力与强度分析  

Stress analysis and strength study of hydraulic slotting casing

作　　者：王德喜[1,2] 罗敏[3] 齐羲[4] 张强[3] 

机构地区：[1]中国地质大学(北京)能源学院 [2]大庆油田有限责任公司第六采油厂,黑龙江大庆163114 [3]大庆石油学院机械科学与工程学院 [4]大庆油田有限责任公司第六采油厂

出　　处：《大庆石油学院学报》2007年第2期51-54,126-127,共4页Journal of Daqing Petroleum Institute

基　　金：黑龙江省教育厅科学技术研究项目(10551005)

摘　　要：以地层、水泥环和套管为研究对象，建立水力割缝三维有限元模型，分别计算不同缝体形状与高度的一组二缝和一组三缝共6种模型下的套管应力，以及套管无缝、射孔2种模型下的套管应力．结果表明：射孔套管与无缝套管相比强度下降11．10%；水力割缝套管与无缝套管相比强度下降5．05％～56．30%，与射孔套管相比强度下降6·79%～50．90%，套管强度和应力明显受割缝个数、缝体形状和缝体高度的影响.This paper takes stratum, cement sheath and casing as research target. Three-dimensional finite element model about the hydraulic slotting has been established, the casing stress of six models with different shapes and heights of slotting has been calculated respectively, including two slotting models and three slotting models. It also computes the casing stress of the condition that the casing has no slotting and has perforation. The result shows that the stress of perforation casing decreases by 11.1 percent compared with the ones of no slotting, but the strength of slotting casings decrease by 5.05 to 56.3 percent compared with the ones of no slotting. They are influenced obviously by numbers, shapes and heights of the slotting.

关 键 词：水力割缝 套管 有限元 强度 

分 类 号：TE355.9[石油与天然气工程—油气田开发工程]