CAJ | 학술논문

油田现场进行开关井作业时，管柱内压瞬时变化会引起管柱大幅受迫振动。考虑实际工况，改进了输流管道的水锤分析模型，使其适用于分析完井管柱在水锤作用下的振动特性。根据现场试验数据对比了开井工况下和排液工况下的振动加速度与振动频率。运用有限元软件 Abaqus 建立了三维有限元管柱模型，求得了管柱振型图、固有频率，然后对模型施加加速度得到其在危险时刻的应力分布情况。最后以管柱所受应力为指标，评价了在开关井工况下完井管柱的安全性。分析结果表明：开关井工况下完井管柱振动相对更为剧烈，且极易发生破坏性的共振，甚至会造成管柱的塑形变形。因此在开关井工况下，由于管柱的强烈受迫振动所产生的安全性隐患必须引起充分重视。
유전현장진행개관정작업시，관주내압순시변화회인기관주대폭수박진동。고필실제공황，개진료수류관도적수추분석모형，사기괄용우분석완정관주재수추작용하적진동특성。근거현장시험수거대비료개정공황하화배액공황하적진동가속도여진동빈솔。운용유한원연건 Abaqus 건립료삼유유한원관주모형，구득료관주진형도、고유빈솔，연후대모형시가가속도득도기재위험시각적응력분포정황。최후이관주소수응력위지표，평개료재개관정공황하완정관주적안전성。분석결과표명：개관정공황하완정관주진동상대경위극렬，차겁역발생파배성적공진，심지회조성관주적소형변형。인차재개관정공황하，유우관주적강렬수박진동소산생적안전성은환필수인기충분중시。
In the oil field when the well be opened or closed sometimes,instantaneous changes of tubing’s internal pressure will cause acute tubing vibration.According to actual condition,this pa-per improved hammer analysis model of pipeline to make it apply to hammer analysis of comple-tion tubing.According to the field experiment data,comparison of the difference of vibration de-gree between the condition of well startup and liquid discharge is made.By finite element software vibration model diagram,natural frequency,and the stress distribution at dangerous moment are achieved after vibration acceleration is forced to the model.Finally stress as evaluation index is taken to evaluate the safety of completion tubing when the well be opened or closed.The analysis results show that,during well startup or shutdown completion tubing vibration is more intense, and occur destructive resonance easily,even cause plastic deformation of tubing.