石油钻采工艺Issue(5)：43-46,4.
水泥环弹性参数对套管-水泥环-地层固结体结构完整性的影响
Impact of elastic parameters of cement ring on structural integrity of casing-cement ring-strata cementing combination
摘要
Abstract
In the process of the oil and gas well operations such as casing pressure test, fracturing, etc., casing-cement ring-strata cementing combination will have stress and deformation response. Under the condition of high load, the cement ring body damage, cementing interface tear, and other forms of structural failure may occur, which may make the effect of cement ring sealing worsen. The casing-cement ring-strata cementing combination ifnite element mechanics model was established by using the mechanics theory and ifnite element theory in the paper. The impact of elastic parameters of cement on the casing-cement ring-strata cementing combina-tion structural integrity was analyzed. The results showed that, when the elastic modulus of cement ring was smaller, the deformability was better, and cement stone was more dififcult to be hardness crushed after load, while the tear resistance was better after unload;The smaller the poisson ratio was, the harder the cement was to be crushed under the geological conditions of high in-situ stress. The larger the poisson ratio was, the harder the cementation interface was to be tore under the geological conditions of low in-situ stress. The opti-mization of cement ring elastic perameters should be based on speciifc circumstances such as cementing well depth in the comprehensive consideration of loading and unloading methods in engineering designing.关键词
水泥环/弹性模量/泊松比/固结体/胶结界面/应力Key words
cementing ring/elastic modulus/poisson ratio/cementing combination/cementing interface/stress分类
能源科技引用本文复制引用
张景富,张德兵,张强,岳宏野,王博,杨金龙..水泥环弹性参数对套管-水泥环-地层固结体结构完整性的影响[J].石油钻采工艺,2013,(5):43-46,4.基金项目
中国石油集团钻井工程技术研究院项目“水泥环结构完整性研究与评价”（编号2011A-4200-F2012052）。 （）
