隔热保温防磨油管下入深度确定方法
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摘要
隔热保温防磨油管广泛应用于高凝原油开采,但其价格昂贵,准确计算其在油井的下入深度既可以实现保温效果的最大化,又能够有效控制材料成本,提高高凝、高含蜡油井开采效益。为此,以某隔热保温防磨油管为例,依据质量守恒定律、动量守恒定律和能量守恒定律,将油井产液看作气液两相流,建立了油井井筒温度场控制模型和井筒传热模型,开展了隔热保温防磨油管下入深度研究。通过对比多种计算方法,得到计算结果与现场实际很接近的迭代求解数值方法,保证了模型的收敛和稳定。B-2D井的应用结果表明:模型计算结果与生产现场测试结果相对误差为2. 12%; 30余口油井应用后平均节约225 m保温隔热防偏磨油管,平均井口温度提高18. 3℃,油井井口回压平均降低0. 42 MPa。建立的油井井筒温度场控制模型和井筒传热模型不仅可用于自喷井保温油管的下入深度计算,也可以为水合物形成、注氮气或注蒸汽工艺参数设计提供依据。
The thermal insulation anti-wear tubing is widely used in high-condensation crude oil producing.The high price of the tubing makes accurate running depth calculation an effective way to maximize the heat insulation effect and effectively control the material cost,leading to improved benefits of producing high pour point and high waxy oil. In view of this,taking a kind of thermal insulation anti-wear tubing for case study,based on mass conservation,momentum conservation and energy conservation law,considering produced fluid as gas-liquid twophase flow,the well wellbore temperature field control model and wellbore heat transfer model are established for studying the running depth of the thermal insulation anti-wear tubing. By comparing various calculation methods,the numerical method of iterative,which ensures the convergence and stability of the model,is selected,whose results is close to the actual results. The application results of B-2 D Well showed that the relative error between calculation result and onsite test result is 2. 12%. Applications in more than 30 oil wells had an average saved tubing of 225 m,an average increased wellhead temperature by 18. 3 ℃ and an average reduced backpressure by 0. 42 MPa. The well wellbore temperature field control model and wellbore heat transfer model can be used not only for the calculation of the depth of the thermal insulation tubing,but also for the technological parameter design of hydrate formation,nitrogen injection or steam injection.
The thermal insulation anti-wear tubing is widely used in high-condensation crude oil producing.The high price of the tubing makes accurate running depth calculation an effective way to maximize the heat insulation effect and effectively control the material cost,leading to improved benefits of producing high pour point and high waxy oil. In view of this,taking a kind of thermal insulation anti-wear tubing for case study,based on mass conservation,momentum conservation and energy conservation law,considering produced fluid as gas-liquid twophase flow,the well wellbore temperature field control model and wellbore heat transfer model are established for studying the running depth of the thermal insulation anti-wear tubing. By comparing various calculation methods,the numerical method of iterative,which ensures the convergence and stability of the model,is selected,whose results is close to the actual results. The application results of B-2 D Well showed that the relative error between calculation result and onsite test result is 2. 12%. Applications in more than 30 oil wells had an average saved tubing of 225 m,an average increased wellhead temperature by 18. 3 ℃ and an average reduced backpressure by 0. 42 MPa. The well wellbore temperature field control model and wellbore heat transfer model can be used not only for the calculation of the depth of the thermal insulation tubing,but also for the technological parameter design of hydrate formation,nitrogen injection or steam injection.
引文
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[7]刘兴仁,刘悦.一种耐磨、内衬耐压、防腐、纳米隔热复合油管:201610659765.5[P].2018-02-02.LIU X R,LIU Y.The utility model relates to a wear-resistant,lined,anti-corrosion,nano-insulating composite tubing:201610659765.5[P].2018-02-02.
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[9]刘兴仁,刘悦.一种内衬耐磨、外裹隔热保温复合油管:2017103162622[P].2017-08-29.LIU X R,LIU Y.The utility model relates to a composite oil pipe with wear-resisting inner lining and heat insulation outside:2017103162622[P].2017-08-29.
[10]刘兴仁,刘悦.一种内衬隔热保温油管:2017105223476[P].2017-08-18.LIU X R,LIU Y.A kind of insulation oil pipe with inner lining:2017105223476[P].2017-08-18.
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[12]麦瑞天.高凝点原油探井测试中保温油管下深的确定[J].石油钻采工艺,1989,8(2):37-42.MAI R T.Determination of the depth of heat preservation tubing in the side test of high condensate crude oil exploration wel[J].Oil Drilling&Production Technology,1989,8(2):37-42.
[13]宋洵成,管志川,韦龙贵,等.保温油管海洋采油井筒温度压力计算耦合模型[J].石油学报,2012,33(6):1064-1067.SONG X C,GUAN Z C,WEI L G,et al.A coupled model of temperature-pressure calculation for offshore production wellbores with insulated tubing[J].Acta Petrolei Sinica,2012,33(6):1064-1067.
[14]白健华,刘义刚,吴华晓,等.海上高含蜡油田隔热油管防蜡优化设计[J].长江大学学报(自然科学版),2015,12(35):71-74.BAI J H,LIU Y G,WU H X,et al.Optimized design of vacuum insulated tubing for wax control in offshore oilfield with high wax content[J].Journal of Yangze University(Natural Science Edition),2015,12(35):71-74.
[15]管虹翔,李成见,李萍,等.隔热油管技术应用于海上稠油常规生产井数值模拟分析[J].中国海上油气,2008,20(4):257-260.GUAN H X,LI C J,LI P,et al.Numerical simulation about heat insulation tube’s application in offshore conventional viscous oil well[J].China Offshore Oil and Gas,2008,20(4):257-260.
[16]姚传进,雷光伦,蒋宝云,等.高凝油井筒温度场计算及流态转变分析[J].石油钻采工艺,2011,33(3):42-46.YAO C J,LEI G L,JIANG B Y,et al.Wellbore-temperature distribution calculation and of flow pattern changing analysis in high pour-point oil wells[J].Oil Drilling&Production Technology,2011,33(3):42-46.
[17]付亚荣,李仰民,马永忠,等.分层采油井下油嘴直径的设计方法[J].石油钻采工艺,2017,39(5):600-603.FU Y R,LI Y M,MA Y Z,et al.A design method for choke diameter of separate layer production[J].Oil Drilling&Production Technology,2017,39(5):600-603.
[18]付亚荣.人工鱼群算法在油井防腐阻垢设计中的应用[J].石油钻探技术,2010,38(3):101-103.FU Y R.Oil well corrosion prevention design using artificial fish-swarm algorithm[J].Petroleum Drilling Techniques,2010,38(3):101-103.
[2]李晓益,何汉平,段友智,等.砂岩孔隙型地热井提高热效工艺分析[J].石油钻采工艺,2017,39(4):484-490.LI X Y,HE H P,DUAN Y Z,et al.Analysis on the thermal efficiency improvement process for geothermal well in porous sandstone[J].Oil Drilling&Production Technology,2017,39(4):484-490.
[3]郭道宏.油管隔热保温试验研究[J].石油矿场机械,2011,40(11):26-28.GUO D H.Testing study of thermal insulation for tubing[J].Oil Field Equipent,2011,40(11):26-28.
[4]付亚荣,王爱芳,马永忠,等.油井内衬外裹油管试验成功的节能启示[J].石油石化节能,2015,5(7):26-27.FU Y R,WANG A F,MA Y Z,et al.Energy-saving inspiration from successful test of oil well lining and tubing[J].Energy Conservation in Petroleum&Petrochemical Industry,2015(7):26-27.
[5]付亚荣,李仰民,杨中峰,等.隔热保温防磨油管在高含蜡油井的应用[J].石油石化节能,2019,9(1):44-46.FU Y R,LI Y M,YANG Z F,et al.Application of heat insulation,insulation and wear proof oil pipe in high wax oil well[J].Energy Conservation in Petroleum&Petrochemical Industry,2019,9(1):44-46.
[6]郭茜.复合隔热内衬油管技术研究与应用[D].成都:西南石油大学,2016:1-59.GUO Q.The research and application of composite insulation lining tubing technology[D].Chengdu:Southwest Petroleum Univetity,2016:1-59.
[7]刘兴仁,刘悦.一种耐磨、内衬耐压、防腐、纳米隔热复合油管:201610659765.5[P].2018-02-02.LIU X R,LIU Y.The utility model relates to a wear-resistant,lined,anti-corrosion,nano-insulating composite tubing:201610659765.5[P].2018-02-02.
[8]刘兴仁,刘悦.一种内衬耐磨、隔热保温复合油管:2017105219019[P].2017-09-15.LIU X R,LIU Y.The utility model relates to a composite oil pipe with wear-resistant and heat-insulating lining:2017105219019[P].2017-09-15.
[9]刘兴仁,刘悦.一种内衬耐磨、外裹隔热保温复合油管:2017103162622[P].2017-08-29.LIU X R,LIU Y.The utility model relates to a composite oil pipe with wear-resisting inner lining and heat insulation outside:2017103162622[P].2017-08-29.
[10]刘兴仁,刘悦.一种内衬隔热保温油管:2017105223476[P].2017-08-18.LIU X R,LIU Y.A kind of insulation oil pipe with inner lining:2017105223476[P].2017-08-18.
[11]曹俊杰,李国栋,孙凤合.一种油井用隔热保温防磨油管:201610255875.5[P].2018-05-04.CAO J J,LI G D,SUN F H.A heat insulation and abrasion proof oil pipe for oil wells:201610255875.5[P].2018-05-04.
[12]麦瑞天.高凝点原油探井测试中保温油管下深的确定[J].石油钻采工艺,1989,8(2):37-42.MAI R T.Determination of the depth of heat preservation tubing in the side test of high condensate crude oil exploration wel[J].Oil Drilling&Production Technology,1989,8(2):37-42.
[13]宋洵成,管志川,韦龙贵,等.保温油管海洋采油井筒温度压力计算耦合模型[J].石油学报,2012,33(6):1064-1067.SONG X C,GUAN Z C,WEI L G,et al.A coupled model of temperature-pressure calculation for offshore production wellbores with insulated tubing[J].Acta Petrolei Sinica,2012,33(6):1064-1067.
[14]白健华,刘义刚,吴华晓,等.海上高含蜡油田隔热油管防蜡优化设计[J].长江大学学报(自然科学版),2015,12(35):71-74.BAI J H,LIU Y G,WU H X,et al.Optimized design of vacuum insulated tubing for wax control in offshore oilfield with high wax content[J].Journal of Yangze University(Natural Science Edition),2015,12(35):71-74.
[15]管虹翔,李成见,李萍,等.隔热油管技术应用于海上稠油常规生产井数值模拟分析[J].中国海上油气,2008,20(4):257-260.GUAN H X,LI C J,LI P,et al.Numerical simulation about heat insulation tube’s application in offshore conventional viscous oil well[J].China Offshore Oil and Gas,2008,20(4):257-260.
[16]姚传进,雷光伦,蒋宝云,等.高凝油井筒温度场计算及流态转变分析[J].石油钻采工艺,2011,33(3):42-46.YAO C J,LEI G L,JIANG B Y,et al.Wellbore-temperature distribution calculation and of flow pattern changing analysis in high pour-point oil wells[J].Oil Drilling&Production Technology,2011,33(3):42-46.
[17]付亚荣,李仰民,马永忠,等.分层采油井下油嘴直径的设计方法[J].石油钻采工艺,2017,39(5):600-603.FU Y R,LI Y M,MA Y Z,et al.A design method for choke diameter of separate layer production[J].Oil Drilling&Production Technology,2017,39(5):600-603.
[18]付亚荣.人工鱼群算法在油井防腐阻垢设计中的应用[J].石油钻探技术,2010,38(3):101-103.FU Y R.Oil well corrosion prevention design using artificial fish-swarm algorithm[J].Petroleum Drilling Techniques,2010,38(3):101-103.
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