摘要
为提高稠油热采井防砂效果,基于线弹性热—固耦合理论,考虑筛管弹性模量及屈服强度随温度变化、钻孔对筛管中心管强度影响,利用FEPG系统开发了防砂筛管热稳定性分析有限元程序,对不同工况下防砂筛管稳定性进行了模拟。其模拟结果表明,筛管弹性模量及屈服强度受温度影响较大,随着温度的升高、口袋沉砂密实程度的增大,防砂管柱等效应力逐渐增加。同时,采用动态位移边界对热力补偿器进行建模,热力补偿器的配备可显著增强防砂管柱稳定性。
In order to improve the sand control effect in thermal production wells, based on the linear elasticity thermal-solid coupling theory, considering the factors which include screen elasticity modulus and the yield strength＇s change which is caused by temperature change and base pipe＇s strength which is caused by holes, we developed the sand control thermal stress stimulation finite- element program by using the FEPG system, with which the sand control screen stability under different working condition is simulated. The simulation result indicates that temperature has much influence on the screen elasticity modulus and the yield strength, and with the increasing of temperature and sand density the sand control string equivalent stress is increasing. At the same time, model of thermal compensator is constructed by using dynamic offsetting border and the sand screen string stability is apparently increasing with the installment of thermal compensator.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2010年第1期45-49,共5页
Oil Drilling & Production Technology
关键词
防砂筛管
热-固耦合
热力补偿
沉砂
密实程度
sand control screen
thermal-solid coupling
thermal compensator
setting sand
compactness
