隔水管循环注液对深水气井测试管柱温度分布的影响  

Effect of riser circulating liquid injection on the temperature distribution in test string of deepwater gas wells

作　　者：杨志[1] 陈晓宇 孟文波 董钊 耿凤康 YANG Zhi;CHEN Xiaoyu;MENG Wenbo;DONG Zhao;GENG Fengkang(College of Petroleum Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China;CNOOC China Limited,Zhanjiang Branch,Zhanjiang,Guangdong 524057,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《中国海上油气》2019年第3期127-132,共6页China Offshore Oil and Gas

基　　金：“十三五”国家科技重大专项“海洋深水油气田开发工程技术(编号:2016ZX05028-001)”部分研究成果

摘　　要：为了准确预测深水气井测试管柱内的井筒温度分布,根据能量守恒原理及传热学原理,建立了深海气井在普通测试流程及在隔水管内循环注入常温水工况下的井筒温度预测模型。模拟计算结果表明,隔水管循环注入常温水对测试管柱的温度有一定的影响,当水深大于200m时循环液温度与海水温度基本一致,循环时可使隔水管环空温度降低从而增大水合物生成风险。因此,水深大于200m的深水气井不宜采用隔水管循环注水。本文研究成果对于深水气井隔水管循环注液测试具有指导意义。In order to accurately predict the wellbore temperature distribution in test string of deepwater gas wells,a wellbore temperature prediction model for deepwater gas wells under normal testing process and under riser circulating normal temperature water injection was established based on the principle of energy conservation and heat transfer mechanism. Simulation results show that circulating normal temperature water injection to riser has some impact on the temperature of the test string. When the water depth exceeds 200 meters,the temperature of the circulating fluid is basically same with that of the sea water,and the circulation may reduce the temperature of riser annulus,which will increase the risk of hydrate generation. Therefore,circulating water injection to riser is not recommended for deepwater gas wells over 200 meters. The research results of this paper are of guiding significance for the test of riser circulating liquid injection in deepwater gas wells.

关 键 词：深水气井 隔水管循环注液 测试管柱 温度分布 预测模型 

分 类 号：TE272[石油与天然气工程—油气井工程]