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多级多段细分注水管柱动态力学分析及蠕动规律
黄志宏1,2,王旱祥1,马珍福3,鲍蕊1,刘延鑫1,魏振1,兰文剑1,汪润涛1
(1.中国石油大学(华东)机电工程学院,山东青岛 266580;2.中国石化胜利油田分公司科技处,山东东营 257000;3.中国石化胜利油田分公司石油工程技术研究院,山东东营 257000)
摘要:
为准确分析多级多段注水管柱在不同工况下的动态力学性能及蠕动现象,在考虑井筒三维轨迹及多级多段注水管柱空间受力的基础上建立注水管柱三维力学模型,分析封隔器处受力连续性条件和注水管柱动态力学性能,研究封隔器的蠕动机制,提出多级多段注水管柱力学蠕动计算方法。针对河43-12井注水管柱,开展不同作业工况下的蠕动分析。结果表明:所提出蠕动算法的计算结果误差范围为8%~15%,具有较高的准确性;不同工况转换过程中,由于温度、压力变化剧烈,管柱蠕动明显,各级封隔器蠕动变化规律随时间变化基本一致;注水管柱施加刚性锚定后,各级封隔器蠕动量均大幅减小。
关键词:  多级多段  细分注水  管柱力学  动态分析  蠕动
DOI:10.3969/j.issn.1673-5005.2019.06.017
分类号::TE 357
文献标识码:A
基金项目:国家科技重大专项(2016ZX05011-004)
Study on dynamic mechanical analysis and creep law of multi-stage segmental subdivision water injection pipe string
HUANG Zhihong1,2, WANG Hanxiang1, MA Zhenfu3, BAO Rui1, LIU Yanxin1, WEI Zhen1, LAN Wenjian1, WANG Runtao1
(1.College of Mechanical and Electronic Engineering in China University of Petroleum(East China), Qingdao 266580, China;2.Science and Technology Department of Shengli Oilfield Branch, SINOPEC, Dongying 257000, China;3.Petroleum Engineering Technology Research Institute of Shengli Oilfield Branch, SINOPEC, Dongying 257000, China)
Abstract:
In order to accurately analyze the dynamic mechanical properties and creep behavior of multi-stage and multi-segment water injection pipe under different working conditions, a three-dimensional mechanical model of water injection pipe string was established. The three-dimensional trajectory of the wellbore and the spatial force of the multi-stage and multi-segment water injection pipe string were considered. The stress continuity conditions at the packer and the dynamic mechanical properties of the water injection pipe string were analyzed, the creep mechanism of the packer was studied and corresponding suggestions were put forward. The creep analyses were performed under different working conditions aiming at the water injection column of the well H 43-12. The results show that the error range of the creep algorithm proposed was 8%-15%, which possesses a high accuracy. During different conditions, due to the extreme changes of temperature and pressure, the creep of the column is very obvious. The creep variation law of the separator is basically the same with time passing by. Moreover, after the rigid injection of the water injection pipe column, the creep amount of the packer at each level greatly reduces.
Key words:  multi-stage and multi-segment  subdivision water injection  string mechanics  dynamic analysis  creep
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