三级分层注水管柱蠕动研究
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摘要
多级细分层注水已成为开采薄差层油气资源的重要手段,但由于其注水管柱结构、工艺流程以及管柱受力相对复杂,使得封隔器蠕动失效问题日益突出。为了更准确地分析注水管柱蠕动影响因素及蠕动规律,在考虑管柱受力、管柱结构和作业参数等多种因素的基础上建立了三级分层注水管柱封隔器蠕动模型,并提出了蠕动计算的新方法。通过对实际注水管柱在不同作业工况下的蠕动分析,得到了注水压力、节流压差及注水温度等因素对注水管柱蠕动的影响规律,即第一层段注水压力增大时,注水管柱蠕动量最小;当第一层段配水器节流压差逐渐增大时,各级封隔器蠕动量最小;当注水温度随着注入时间的延长越接近地层初始温度时,注水管柱蠕动量越小。研究结果表明:施加刚性锚定和锚定补偿措施可以大幅度减小管柱蠕动,对延长封隔器寿命和提高分注作业成功率有重要意义。
Multi-stage separate layer water injection has become an important means to exploit poor thin-layer oil and gas resources. However,owing to the relatively complicated water injection string structure,process flow and the stress on the pipe string,the problem of creep failure of the packer has become increasingly prominent. To accurately analyze the influencing factors and creeping of the water injection string,the creep model of the threestage separate layer water injection packer was established based on various factors such as string stress,string structure and operating parameters. A new method of creep calculation was proposed. Through the analyses of the creep of water injection string under different working conditions,the influences of water injection pressure,choke pressure difference and water injection temperature on the creep of the water injection string were obtained. That is,the injection pressure increase in the first water injection interval results in the minimum creep of the water injection string. The increase of the pressure difference of the first stage water distributor leads to the minimum creep of each packer. When the water injection temperature becomes closer to the initial temperature of the formation with the injection time,the water injection string creep decreases. The results show that the application of rigid anchoring and anchoring compensation measures can greatly reduce the string creep,which is of great significance for prolonging the life of the packer and improving the success rate of the separate layer water injection.
Multi-stage separate layer water injection has become an important means to exploit poor thin-layer oil and gas resources. However,owing to the relatively complicated water injection string structure,process flow and the stress on the pipe string,the problem of creep failure of the packer has become increasingly prominent. To accurately analyze the influencing factors and creeping of the water injection string,the creep model of the threestage separate layer water injection packer was established based on various factors such as string stress,string structure and operating parameters. A new method of creep calculation was proposed. Through the analyses of the creep of water injection string under different working conditions,the influences of water injection pressure,choke pressure difference and water injection temperature on the creep of the water injection string were obtained. That is,the injection pressure increase in the first water injection interval results in the minimum creep of the water injection string. The increase of the pressure difference of the first stage water distributor leads to the minimum creep of each packer. When the water injection temperature becomes closer to the initial temperature of the formation with the injection time,the water injection string creep decreases. The results show that the application of rigid anchoring and anchoring compensation measures can greatly reduce the string creep,which is of great significance for prolonging the life of the packer and improving the success rate of the separate layer water injection.
引文
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[16]蒋建勋,刘琦,程福平,等.分层注水工艺管柱变形量计算[J].西南石油大学学报,2007,29(5):145-148.JIANG J X,LIU Q,CHENG F P,et al. Calculation of string deformation for separate zone water injection technique[J]. Journal of Southwest Petroleum University,2007,29(5):145-148.
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[2] ZHENG A S,ADNAN S. The penetration of coiled tubing with residual bend in extended-reach wells[J].SPE Production&Operations,2005,22(1):78-82.
[3]窦益华,吕维平,张福祥,等.支撑式跨隔测试管柱力学分析及其应用[J].石油钻采工艺,2007,29(4):106-109.DOU Y H,LW P,ZHANG F X,et al. Mechanical analysis and application of supported span test columns[J]. Oil Drilling&Production Technology,2007,29(4):106-109.
[4]彭远进,刘建仪,叶常青,等.注气井中油管轴向位移计算比较分析[J].石油钻采工艺,2006,28(2):55-57.PENG Y J,LIU J Y,YE C Q,et al. Axial displacement comparative analysis of the tubing string in the gas injection wells[J]. Oil Drilling&Production Technology,2006,28(2):55-57.
[5]丁亮亮,练章华,陈世春,等.高压深井压井过程中井筒温度数值模拟[J].石油钻采工艺,2011,33(4):15-18.DING L L,LIAN Z H,CHEN S C,et al. Numerical simulation of wellbore temperature during high-pressure deep well kills[J]. Oil Drilling&Production Technology,2011,33(4):15-18.
[6]李琪,李旭阳,王再兴,张永忠.压裂管柱轴向变形的理论计算及应用[J].石油钻采工艺,2016,38(4):467-472.LI Q,LI X Y,WANG Z X,et al. Theoretical calculation and application of axial deformation of fracturing string[J]. Oil Drilling&Production Technology,2016,38(4):467-472.
[7]张良涛,郝恒泽,刘敏,等. DXY441-114型防蠕动封隔器的研制与试验[J].石油机械,2010,38(5):62-63.ZHANG L T,HAO H Z,LIU M,et al. Development and test of DXY441-114 anti-peristaltic packer[J].China Petroleum Machinery,2010,38(5):60-63.
[8]夏健,王忠秀,杨春林,等.底部支撑锚定分注管柱的研究与应用[J].石油钻采工艺,2015,37(5):89-91.XIA J,WANG Z X,YANG C L,et al. Research and application of anchoring and dispensing pipe column with bottom support[J]. Oil Drilling&Production Technology,2015,37(5):89-91.
[9]刘延鑫,苑得鑫,王旱祥.注水管柱蠕动机理分析及蠕动量计算[J].钻采工艺,2016,39(3):50-52.LIU Y Y,YUAN D X,WANG H X. Analysis of peristaltic mechanism of perfusion columns and calculation of peristaltic momentum[J]. Drilling&Production Technology,2016,39(3):50-52.
[10]崔玉海,唐高峰,丁晓芳,等.注水管柱中温度效应的分析与计算[J].石油钻采工艺,2003,25(2):50-54.CUI Y H,TANG G F,DING X F,et al. Analysis and calculation of the temperature effect in the water injection string[J]. Oil Drilling&Production Technology,2003,25(2):50-54.
[11]李岩松.气液两相混输管道水热力模型研究进展[J].油气储运,2017,36(9):993-1000.LI Y S. Research progress on the hydro-thermal models of gas-liquid two-phase mixed transmission pipelines[J]. Oil&Gas Storage and Transportation,2017,36(9):993-1000.
[12]何祖清,刘清友,王国荣,等.注水管柱压力场计算模型研究[J].石油机械,2007,35(3):14-15.HE Z Q,LIU Q Y,WANG G R,et al. Study on calculation model of pressure field of injection pipe string[J]. China Petroleum Machinery,2007,35(3):14-15.
[13]刘延鑫,王旱祥,房军,等.注水管柱力学分析及其应用[J].机械强度,2012,6(1):79-82.LIU Y X,WANG H X,FANG J,et al. Mechanical analysis of injection string and its application[J]. Journal of Mechanical Strength,2012,6(1):79-82.
[14]刘延鑫,王旱祥,侯乃贺,等.深井试油管柱力学分析及其应用[J].钻采工艺,2012,35(4):71-73.LIU Y X,WANG H X,HOU N H,et al. Mechanical analysis of oil test strings for deep wells and its application[J]. Drilling&Production Technology,2012,35(4):71-73.
[15]李建君,巴金红,刘春,等.金坛盐穴储气库现场问题及应对措施[J].油气储运,2017,36(8):982-986.LI J J,BA J H,LIU C,et al. Problems in the field of Jintan salt-cavern gas storage and their countermeasures[J]. Oil&Gas Storage and Transportation,2017,36(8):982-986.
[16]蒋建勋,刘琦,程福平,等.分层注水工艺管柱变形量计算[J].西南石油大学学报,2007,29(5):145-148.JIANG J X,LIU Q,CHENG F P,et al. Calculation of string deformation for separate zone water injection technique[J]. Journal of Southwest Petroleum University,2007,29(5):145-148.
[17]胡志强,杨进,李中,等.高温高压井双封隔器管柱安全评估[J].石油钻采工艺,2017,39(3):288-292.HU Z Q,YANG J,LI Z,et al. Safety evaluation of double packer string in high temperature and high pressure wells[J]. Oil Drilling&Production Technology,2017,39(3):288-292.
[18]李钦道,谢光平,张娟.不能移动封隔器管柱变形受力分析[J].钻采工艺,2002,25(2):53-57.LI Q D,XIE G P,ZHANG J. Mechanics and deformation analysis of immoveable packer string[J]. Drilling and Production Technology,2002,25(2):53-57.
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