Temperature Control Capability of Test Fluid Used in Offshore Operations
-
摘要: 深水和高温、高压是目前南海西部勘探开发面临的2大挑战,测试作业更是面临海底低温、井口高温的难题,且保温测试液体系研究在中国尚属空白。通过建立气井测试系统预测传热模型,对影响深水和高温、高压气井测试井筒温度场的测试液控温性能因素进行了敏感性分析,建立了测试液控温性能调整方法。模型验证预测最大温度误差仅为3.4℃,并以此理论为基础,构建了一套控温性能可调、井口温度可控的测试液技术,其切应力大于4Pa。该技术在南海西部某深水气井测试应用中获得了成功。现场测试期间该井实测井口温度为16.5℃,计算预测该井井口温度为18℃,且井筒不同位置实测温度与预测井筒温度场十分接近,最终该井测试安全顺利,气产量达100×104m3/d。Abstract: Deep water and HTHP have been two challenges encountered in the exploration and development operations in the west of South China Sea, and low temperature at the seabed and high temperature at the wellhead are difficulties that must be dealt with in offshore well testing. Study on the heat retaining test fluids has not been found presently in China. Through the construction of the heat transfer prediction model used in gas well testing, sensitivity analyses were performed to those factors of the test fluids affecting the temperature field in the borehole of deep water and HTHP gas wells, and a method of adjusting the temperature control capability of a test fluid was established. The maximum temperature prediction error of the model is only 3.4℃. Using this model and the method, a test fluid with adjustable temperature control capability and controllable wellhead temperature was developed. The test fluid has shear stress greater than 4 Pa, and has been successfully applied in an offshore deep gas well in the west of South China Sea. The measured wellhead temperature during well testing is 16.5℃, while the calculated wellhead temperature is 18℃, and the temperatures measured at the different places in the wellbore are very close to those calculated. Test of the well has been successful, giving gas production rate of 100×104 m3/d.
-
Key words:
- Deep water /
- High temperature high pressure /
- Test fluid /
- Temperature field /
- Low temperature at seabed
-
[1] 白玉湖,李清平,周建良,等. 天然气水合物对深水钻采的潜在风险及对应性措施[J]. 石油钻探技术,2009,37(3):17-21.BAI Yuhu,LI Qingping,ZHOU Jianliang,et al. The potential risk of gas hydrate to deepwater drilling and production and the corresponding strategy[J].Petroleum Drilling Techniques,2009,37(3):17-21. [2] BOTREL T.Hydrates prevention and removal in ultradeepwater drilling systems[C]//Offshore Technology Conference,Offshore Technology Conference,2001. [3] 毛伟. 高温高压气井完井测试井筒压力、温度预测模型与计算方法的应用基础理论研究[D]. 南充:西南石油学院,1999. MAO Wei. Research on applied fundamental theory of wellbore pressure and temperature prediciting model and calculation method during well completion test in high temperature high pressure gas well[D].Nan Chong: Southwest Petroleum University,1999. [4] 王博. 深水钻井环境下的井筒温度压力计算方法研究[D]. 东营:中国石油大学(华东):2007. WANG Bo. Research on the method of wellbore temperature and pressure calculation during deep-water drilling [D].Dongying:China University of Petroleum (East China),2007. [5] 高永海,孙宝江,王志远,等. 深水钻探井筒温度场的计算与分析[J]. 中国石油大学学报(自然科学版),2008,32(2):58-62. GAO Yonghai,SUN Baojiang,WANG Zhiyuan,et al. Calculation and analysis of wellbore temperature field in deepwater drilling[J].Journal of China University of Petroleum(Edition of Nautral Science),2008,32(2): 58-62. [6] 樊宏伟,李振银,张远山,等. 无固相水基隔热封隔液研究应用现状[J]. 钻井液与完井液,2014,31(3):83-88.FAN Hongwei,LI Zhenyin,ZHANG Yuanshan,et al. Status quo of study and application of solids-free water base heat-insulating packer fluid[J].Drilling Fluid & Completion Fluid,2014,31(3):83-88. [7] JAVORA P H,PEARCY R G,WANG X,et al. A decade of experience: the water based thermal insulating packer fluid[C]//SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers,2008. [8] FARZAD T,CHRIS Q.Saving expensive offshore deepwater tig time by modeling accurate subsea/subseafloor temperature modeling for cementing opertations[J]. SPE 123738,2009. [9] 段泽辉,李蔚萍,孟文波,等. 陵水17-2 气田深水测试液类型选择[J]. 钻井液与完井液,2015,32(6):39-42.DUAN Zehui,LI Weiping,MENG Wenbo,et al.Selection of Test Fluid for Reservoir Protectionin Deep Water Area in Lingshui 17-2[J].Drilling Fluid & Completion Fluid,2015,32(6):39-42. [10] 孟文波,李蔚萍,张崇,等. 深水储层保护型测试液研究及在陵水17-2 气田的应用[J]. 钻井液与完井液,2015,32(5):23-26.MENG Wenbo,LI Weiping,ZHANG Chong,et al. Protective Test Fluid for Deepwater Reservoir: Study and Application in Block Lingshui17-2[J].Drilling Fluid & Completion Fluid,2015,32(5):23-26.
点击查看大图
计量
- 文章访问数: 448
- HTML全文浏览量: 102
- PDF下载量: 167
- 被引次数: 0