卧底管-悬链线立管严重段塞流数值模拟
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摘要
POT深海油气田投产前优选并构建了卧底管-悬链线立管集输系统,严重段塞流的预防及影响因素分析至关重要。该文基于卧底管-悬链线立管结构参数及生产参数设计,应用OLGA软件对管线内的流动进行数值模拟,计算分析产量和气液比等生产参数对流型的影响,预测严重段塞流并描绘严重段塞流的流型特征,监测不同产量及气液比情况下立管内最大液塞长度及立管底部最大压力波动值。计算结果表明,卧底管-悬链线立管结构参数设计合理,设计的生产参数范围内不会产生严重段塞流,而在低产量情况下严重段塞流特征规律明显。计算分析产量及气液比与流型的关系,绘制了严重段塞流流型区间预测图。计算得出立管内最大液塞长度及立管底部最大压力波动值,着重分析节流法在抑制严重段塞流中的效果,得到节流阀开度为0.2的POT深海油气田最优化结果,为严重段塞流的预防提供依据。
The pipeline-catenary riser gathering and transportation system is optimized and constructed before the POT deep-water oil and gas field putting into production. The prevention of severe slugging and the analysis of its influencing factors is very important. This paper is based on the structural parameters and the production parameters design of the pipeline-catenary riser.The flow in the pipeline is simulated by OLGA software. The effects of production parameters, such as production, gas-liquid ratio,on the flow pattern are calculated and analyzed, predicting severe slugging and characterizing the flow pattern of severe slugging.The maximum liquid slug length in the riser and the maximum pressure fluctuation at the bottom of riser are measured under different production and gas-liquid ratio. The results show, the design of structure parameters of pipeline-catenary is reasonable,and severe slugging does not occur within the design production parameters, however the characteristic of severe slugging is obvious at low production. The relationship between the production, gas-liquid ratio and the flow pattern is calculated and analyzed. The prediction map of severe slugging flow pattern is drawn. The maximum liquid slug length in the riser and the maximum pressure fluctuation at the bottom of the riser are calculated. The effect of the throttling method in suppressing the severe slug flow is analyzed. The optimal opening result of the POT deep-sea oil and gas field is obtained when the throttle opening is 0.2 and the basis for the prevention of severe slug flow is provided.
The pipeline-catenary riser gathering and transportation system is optimized and constructed before the POT deep-water oil and gas field putting into production. The prevention of severe slugging and the analysis of its influencing factors is very important. This paper is based on the structural parameters and the production parameters design of the pipeline-catenary riser.The flow in the pipeline is simulated by OLGA software. The effects of production parameters, such as production, gas-liquid ratio,on the flow pattern are calculated and analyzed, predicting severe slugging and characterizing the flow pattern of severe slugging.The maximum liquid slug length in the riser and the maximum pressure fluctuation at the bottom of riser are measured under different production and gas-liquid ratio. The results show, the design of structure parameters of pipeline-catenary is reasonable,and severe slugging does not occur within the design production parameters, however the characteristic of severe slugging is obvious at low production. The relationship between the production, gas-liquid ratio and the flow pattern is calculated and analyzed. The prediction map of severe slugging flow pattern is drawn. The maximum liquid slug length in the riser and the maximum pressure fluctuation at the bottom of the riser are calculated. The effect of the throttling method in suppressing the severe slug flow is analyzed. The optimal opening result of the POT deep-sea oil and gas field is obtained when the throttle opening is 0.2 and the basis for the prevention of severe slug flow is provided.
引文
[1]MALEKZXADEH R,HENKES R A W M,MU R F.Severe slugging in a long pipeline-riser system:Experiments and predictions[J].International Journal of Multiphase Flow,2012,46:9-21.
[2]HAN P,GUO L.Numerical simulation of terraininduced severe slugging coupled by hydrodynamic slugs in a pipeline-riser system[J].International Journal of Heat&Fluid Flow,2015,56:355-366.
[3]B?E A.Severe slugging characteristics;part 1:Flow regime for severe slugging;part 2:Point model simulation study[A].Selected Topics in Two-Phase Flow,Trondheim,Norway,March 1981.
[4]TIN V,SARSHAR M.An investigation of severe slugging characteristics in flexible risers[C].Proc.6th International Conference on Multiphase Production France,1993.
[5]高嵩,李巍,尤云祥,等.气液混输悬链线立管系统两相流特性实验[J].力学学报,012,44(1):71-81.GAO Song,LI Wei,YOU Yun-xiang,et al.Experiments on two-phase flow characteristics in a catenary riser system with the gas and liquid mixture transportation[J].Chinese Journal of Theoretical and Applied Mechanics,2012,44(1):71-81.
[6]MOKHATAB S.Severe slugging in a catenary-shaped riser:experimental and simulation studies[J].Petroleum Science&Technology,2007,25(6):719-740.
[7]TOWLER S M B F.Severe slugging in flexible risers:Review of experimental investigations and olga predictions[J].Petroleum Science&Technology,2007,25(7):867-880.
[8]BALINO J L,BURR K P,NEMOTO R H.Modeling and simulation of severe slugging in air-water pipeline-riser systems[J].Int.J.Multiphase Flow,2010,36:643-660.
[9]NEMOTO R H,BALINO J L.Modeling and simulation of gas,oil and water flow in a Catenary-shaped riser[J].Mecánica Computacional,2010,XXIX(11):8699-8715.
[10]高嵩,李巍,尤云祥,等.气液混输管线与立管系统严重段塞流数值研究[J].物理学报,2012,61(10):252-263.GAO Song,LI Wei,YOU Yun-xiang,at el.Numerical investigation on the gas-liquid severe slugging in a pipeline-riser system[J].Acta Phys Sin.,2012,61(10):252-263.
[11]高嵩.气液混输管线与立管系统严重段塞流特性研究[D].上海交通大学,上海,中国,2012.GAO Song.Research on gas-liquid sever slugging characteristics in pipeline-riser systems[D].Shanghai Jiao Tong University,Shanghai,China,2012.
[12]NICKLIN D J,WILKES M A,DAVISON J F.Twophase flow in vertical tubes[J].Chemical Engineering Research and Design,1962,40(a):61-68.
[13]吕明琦.气液混输管线与悬链线立管两相流特性研究[D].上海交通大学,上海,中国,2012.LU Ming-qi.Investigation on two-phase flow characteristics in a pipeline-catenary riser system with the gas and liquid mixture transportation[D].Shanghai Jiao Tong University,Shanghai,China,2012.
[14]吕明琦,高嵩,李巍,等.气液混输管线与悬链线立管系统严重段塞流数值模拟[J].中国海洋平台,2013,28(1):24-28.LU Ming-qi,GAO Song,LI Wei,et al.Numerical simulation for severe slug flow in a catenary riser system with the gas and liquid mixture transportation[J].China Offshore Platform,2013,28(1):24-28.
[15]于涛,赵金睿,王同吉,等.悬链线立管多相流流型研究[J].曲阜师范大学学报(自然科学版),2014(3):69-75.YU Tao,ZHAO Jin-rui,WANG Tong-ji,et al.Study on multiphase flow pattern of catenary riser[J].Journal of Qufu Normal University,2014(3):69-75.
[16]ABBASPOUR M,CHAPMAN K S,GLASGOW L A.Transient modeling of non-isothermal,dispersed twophase flow in natural gas pipelines[J].Applied Mathematical Modelling,2010,34(2):495-507.
[17]宋博,李桐宇,王卫强,等.海洋立管系统严重段塞流瞬态数值模拟[J].辽宁石油化工大学学报,2016,36(3):34-38.SONG Bo,LI Tong-yu,WAMG Wei-qiang,et al.Transient numerical simulation of severe slugging in marine riser system[J].Journal of Liaoning Shihua University,2016,36(3):34-38.
[18]张灿,李巍,尤云祥.卧底管-立管系统严重段塞流瞬态数值模拟[J].水动力学研究与进展A辑,2015,(4):365-375.ZHANG Can,LI Wei,YOU Yun-xiang.Transient simulation for severe slugging in a pipeline-riser system[J].Chinese Journal of Hydrodynamics,2015,(4):365-375.
[19]刘红波.管式液塞捕集器研制及性能测试研究[D].中国石油大学,北京,中国,2009.LIU Hong-bo.Research on development and performance test of multiple-pipe slug catcher[D].China University Of Petroleum.Beijing,China,2009.
[20]张灿.卧底管-立管系统两相流特性研究[D].上海交通大学,上海,中国,2015.ZHANG Can.Investigation on two-phase flow characteristics in pipeline-riser systems[D].Shanghai Jiao Tong University,Shanghai,China,2015.
[2]HAN P,GUO L.Numerical simulation of terraininduced severe slugging coupled by hydrodynamic slugs in a pipeline-riser system[J].International Journal of Heat&Fluid Flow,2015,56:355-366.
[3]B?E A.Severe slugging characteristics;part 1:Flow regime for severe slugging;part 2:Point model simulation study[A].Selected Topics in Two-Phase Flow,Trondheim,Norway,March 1981.
[4]TIN V,SARSHAR M.An investigation of severe slugging characteristics in flexible risers[C].Proc.6th International Conference on Multiphase Production France,1993.
[5]高嵩,李巍,尤云祥,等.气液混输悬链线立管系统两相流特性实验[J].力学学报,012,44(1):71-81.GAO Song,LI Wei,YOU Yun-xiang,et al.Experiments on two-phase flow characteristics in a catenary riser system with the gas and liquid mixture transportation[J].Chinese Journal of Theoretical and Applied Mechanics,2012,44(1):71-81.
[6]MOKHATAB S.Severe slugging in a catenary-shaped riser:experimental and simulation studies[J].Petroleum Science&Technology,2007,25(6):719-740.
[7]TOWLER S M B F.Severe slugging in flexible risers:Review of experimental investigations and olga predictions[J].Petroleum Science&Technology,2007,25(7):867-880.
[8]BALINO J L,BURR K P,NEMOTO R H.Modeling and simulation of severe slugging in air-water pipeline-riser systems[J].Int.J.Multiphase Flow,2010,36:643-660.
[9]NEMOTO R H,BALINO J L.Modeling and simulation of gas,oil and water flow in a Catenary-shaped riser[J].Mecánica Computacional,2010,XXIX(11):8699-8715.
[10]高嵩,李巍,尤云祥,等.气液混输管线与立管系统严重段塞流数值研究[J].物理学报,2012,61(10):252-263.GAO Song,LI Wei,YOU Yun-xiang,at el.Numerical investigation on the gas-liquid severe slugging in a pipeline-riser system[J].Acta Phys Sin.,2012,61(10):252-263.
[11]高嵩.气液混输管线与立管系统严重段塞流特性研究[D].上海交通大学,上海,中国,2012.GAO Song.Research on gas-liquid sever slugging characteristics in pipeline-riser systems[D].Shanghai Jiao Tong University,Shanghai,China,2012.
[12]NICKLIN D J,WILKES M A,DAVISON J F.Twophase flow in vertical tubes[J].Chemical Engineering Research and Design,1962,40(a):61-68.
[13]吕明琦.气液混输管线与悬链线立管两相流特性研究[D].上海交通大学,上海,中国,2012.LU Ming-qi.Investigation on two-phase flow characteristics in a pipeline-catenary riser system with the gas and liquid mixture transportation[D].Shanghai Jiao Tong University,Shanghai,China,2012.
[14]吕明琦,高嵩,李巍,等.气液混输管线与悬链线立管系统严重段塞流数值模拟[J].中国海洋平台,2013,28(1):24-28.LU Ming-qi,GAO Song,LI Wei,et al.Numerical simulation for severe slug flow in a catenary riser system with the gas and liquid mixture transportation[J].China Offshore Platform,2013,28(1):24-28.
[15]于涛,赵金睿,王同吉,等.悬链线立管多相流流型研究[J].曲阜师范大学学报(自然科学版),2014(3):69-75.YU Tao,ZHAO Jin-rui,WANG Tong-ji,et al.Study on multiphase flow pattern of catenary riser[J].Journal of Qufu Normal University,2014(3):69-75.
[16]ABBASPOUR M,CHAPMAN K S,GLASGOW L A.Transient modeling of non-isothermal,dispersed twophase flow in natural gas pipelines[J].Applied Mathematical Modelling,2010,34(2):495-507.
[17]宋博,李桐宇,王卫强,等.海洋立管系统严重段塞流瞬态数值模拟[J].辽宁石油化工大学学报,2016,36(3):34-38.SONG Bo,LI Tong-yu,WAMG Wei-qiang,et al.Transient numerical simulation of severe slugging in marine riser system[J].Journal of Liaoning Shihua University,2016,36(3):34-38.
[18]张灿,李巍,尤云祥.卧底管-立管系统严重段塞流瞬态数值模拟[J].水动力学研究与进展A辑,2015,(4):365-375.ZHANG Can,LI Wei,YOU Yun-xiang.Transient simulation for severe slugging in a pipeline-riser system[J].Chinese Journal of Hydrodynamics,2015,(4):365-375.
[19]刘红波.管式液塞捕集器研制及性能测试研究[D].中国石油大学,北京,中国,2009.LIU Hong-bo.Research on development and performance test of multiple-pipe slug catcher[D].China University Of Petroleum.Beijing,China,2009.
[20]张灿.卧底管-立管系统两相流特性研究[D].上海交通大学,上海,中国,2015.ZHANG Can.Investigation on two-phase flow characteristics in pipeline-riser systems[D].Shanghai Jiao Tong University,Shanghai,China,2015.
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