稠油热采井套管柱应变设计方法

发布时间：2018-06-04 10:57

本文选题：稠油 + 热采井　；参考：《中国石油大学学报(自然科学版)》2017年01期

【摘要】：为解决稠油热采井不断出现的套管损坏现象,改变传统的管柱强度设计方法。基于弹塑性力学理论,在满足套管柱强度设计的基础上建立套管柱应变计算模型;通过对比套管材料应变与结构应变,借助Rambery-Osgood模型得到应变安全系数最小值,提出套管柱应变设计的理论判据,形成套管柱应变设计方法。结果表明,该设计方法在西部油田8口稠油热采井Φ177.8 mm×8.05 mm TG80H特殊螺纹套管柱设计中得到应用,生产4轮次后套管柱未出现变形和泄漏现象,经过14轮次后,套管服役性能依然良好,新热采井套管柱应变设计方法允许套管在可控范围内变形,可有效延长套管使用寿命,降低套损率。
[Abstract]:In order to solve the problem of casing damage in heavy oil thermal recovery wells, the traditional design method of string strength is changed. Based on the theory of elasto-plastic mechanics, the strain calculation model of casing string is established on the basis of the strength design of casing string, and the minimum value of strain safety factor is obtained by comparing the strain of casing material with the strain of structure, using Rambery-Osgood model. The theoretical criterion of casing string strain design is put forward, and the design method of casing string strain is formed. The results show that the design method has been applied to the design of 桅 177.8 mm 脳 8.05 mm TG80H special threaded casing string in 8 heavy oil thermal recovery wells in western oilfield. After 4 rounds of production, the casing string has no deformation and leakage phenomenon, and after 14 rounds, the casing string has no deformation and leakage. The casing service performance is still good, and the new casing string strain design method allows casing deformation in controllable range, which can effectively prolong the casing service life and reduce casing damage rate.
【作者单位】：中国石油集团石油管工程技术研究院;石油管材及装备材料服役行为与结构安全国家重点实验室;中国石油新疆油田公司工程技术研究院;
【基金】：国家自然科学基金项目(51574278) 中国石油天然气集团公司项目(2015E-4006) 陕西省自然科学基础研究计划项目(2013KJXX-07)
【分类号】：TE931.2

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