喷淋作用下的深水测试放喷热辐射规律及关键参数  

Laws and key parameters of thermal radiation during deepwater blowout test under spray action

作　　者：孙巧雷[1,2] 刘语维 张崇 夏乐 冯定 邓龙[1] 任冠龙 董钊 SUN Qiaolei;LIU Yuwei;ZHANG Chong;XIA Le;FENG Ding;DENG Long;REN Guanlong;DONG Zhao(School of Mechanical Engineering,Yangtze University,Jingzhou,Hubei 434020,China;Hubei Engineering Research Center for Oil&Gas Drilling and Completion Tools,Jingzhou,Hubei 434020,China;Zhanjiang Branch of CNOOC Ltd.,Zhanjiang,Guangdong 524057,China)

机构地区：[1]长江大学机械工程学院 [2]湖北省油气钻完井工具工程技术研究中心 [3]中海石油(中国)有限公司湛江分公司

出　　处：《天然气工业》2024年第2期111-121,共11页Natural Gas Industry

基　　金：湖北省自然科学基金“动边界作用下的深水管中管接触碰撞特性研究”(编号:2021CFB180);油气藏地质及开发工程全国重点实验室·西南石油大学项目“深水测试气井地面流程气液固三相流动与安全保障研究”(编号:PLN2022-16);湖北省高等学校省级教学研究项目“海洋强国战略背景下的《海洋油气钻采设备概论》课程教学研究与实践”(编号:2021276);中海石油湛江分公司项目“深水测试风险评估及安全控制技术研究”(编号:CCL2017ZJFN2272)。

摘　　要：在深水天然气测试过程中,多相混合物会通过地面流程分离、泄压、加热后通过燃烧臂放喷燃烧,现场一般采用喷淋的方式来降低热辐射的影响。为了降低深水放喷测试作业时平台及燃烧臂的热辐射风险隐患,首先采用Thornton模型研究了火焰表面辐射能量、视角系数以及水幕透射率等参数,构建了喷淋作用下放喷火焰的热辐射通量计算模型,并结合现场燃烧放喷下的仿真模型,应用有限元软件分析了放喷喷淋影响下的火焰温度和辐射量变化规律。研究结果表明:(1)喷淋形成的水幕使靠近平台区域的温度和辐射量明显降低,放喷管道附近的辐射量由2 050 W/m^(2)减小到了1 840 W/m^(2);(2)在单个水幕的作用下,水幕吸收了一定的热辐射量,水幕温度从11.85℃上升到约26.85℃;(3)由于平台附近的空气中CO_(2)和H_(2)O含量较低,空气的热辐射吸收系数较小,温度主要受到热对流的影响,空气温度基本保持在26.85~36.15℃之间;(4)不同放喷管径和产量变化下平台附近区域的温度和辐射量变化趋势基本一致,管径减小使得辐射峰值增大。结论认为,该研究成果进一步明确了深水测试放喷不同工况下的热辐射分布,为深水地面放喷热辐射设计分析及安全控制提供了技术支撑。In the process of a deepwater natural gas test,the multiphase mixture is separated,depressurized and heated through the ground process and then blown out for burning with the burner boom.And on site,spray is generally adopted to reduce the influence of thermal radiation.In order to reduce the thermal radiation risks to the platform and the burner boom in the process of a deepwater blowout test,this paper applies the Thornton model to research flame surface radiation energy,angle coefficient and water curtain transmittance,and establishes a thermal radiation flux calculation model of the blowout flame under the action of spray.Then,the variation of flame temperature and radiation rate under the influence of spray during the blowout is analyzed using the finite element software,combined with the simulation model of on-site blowout and combustion.And the following research results are obtained.First,the water curtain formed by the spray reduces the temperature and radiation near the platform area,and the radiation rate near the blowout pipeline is reduced from 2050W/m^(2) to 1840W/m^(2).Second,under the action of a single water curtain,a certain amount of thermal radiation is absorbed to increase the water curtain temperature from 11.85℃ to 26.85℃.Third,due to the low content of CO_(2) and H_(2)O in the air near the platform,the thermal radiation absorption coefficient of the air is relatively small,so the temperature is mainly affected by thermal convection.The air temperature is basically maintained between 26.85℃ and 36.15 ℃.Fourth,the varying trend of temperature and radiation in the vicinity of the platform with blowout pipe diameter and production rate is basically consistent,and the decrease of pipe diameter leads to the increase of the peak radiation.In conclusion,the research results further clarify the distribution of thermal radiation under different working conditions of deepwater blowout test,and provide technical support for the design and safety control of thermal radiation in deepwater surfac

关 键 词：深水测试 放喷 燃烧嘴 喷淋作用 辐射温度 辐射量 辐射分布 燃烧 

分 类 号：TE5[石油与天然气工程—油气田开发工程]