第33卷第4期 2016年7月
钻井液与完井液
DRILLINGFLUID&COMPLETIONFLUID
doi: 10.3696/j.issn.1001-5620.2016.04.025
海上气井测试液控温性能调整方法
任冠龙，张崇，董钊，余意，曾春眠
（中海石油（中国）有限公司湛江分公司，广东湛江524057）
任冠龙等.海上气井测试液控温性能调整方法[].钻井液与完井液，2016，33（4）：117-121.
Vol.33 No.4 July2016
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。通过建立气并测试系统预测传热模型，对影响深水和高温、高压气井测试并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。现场测试期间该并实测井口温度为16.5℃，计算预测该井井口温度为18℃，且并筒不同位置实测温度与预测并筒温度场十分接近，最终该并测试安全顺利，气产量达100×10"m/d。
关键词深水；高温高压；测试液；温度场；海底低湿
中图分类号：TE257
文献标识码：A
文章编号：1001-5620（2016）04-0117-05
TemperatureControlCapabilityofTestFluid Used inOffshoreOperations
REN Guanlong,ZHANGChong,DONGZhao,YUYi,ZENG Chunmin(Zhanjiang Branch Company, CNOOC, Zhanjiang, Guangdong 524057)
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 eror of the model is only 3.4 °C. 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 °C, while the calculated wellhead temperature is 18 °C, and the temperatures mecasured at the different places in the wellbore are very close to those calculated. Test of the well has been successful, giving gas production rate of100×10°m/d
Key words Deep water; High temperature high pressure; Test fluid; Temperature field; Low temperature at seabed
中国南海海域有着丰富的油气资源，深水和高温、高压是目前面临的2大挑战，目前勘探区域水深范围已达到1500～3000m，高温高压井钻探最高温度已达200℃以上，地层压力系数大于2.0，且南海西部面临着深水高温高压井的钻井作业。深水气井测试中，海底低温是测试作业面临的最大问题之一，高温油气在油管内自下而上流动时，油气
中的大量热量会向低温地层（或海水）散失掉，大量热量散失会导致析蜡、生成天然气水合物、环空出现较大的带压值等严重后果；而高温高压气井测试中，地层流体在到达井口后仍具有相当高的温度，高温流体会给地面测试流程带来一系列风险，严重制约测试放喷产量[1-3]。因此研究深水高温高压气井测试作业井筒温度场分布规律，建立测试液控温
第一作者简介：任冠龙，1988年生，硕士，现在主要从事储层保护、钻完井工艺方面的研究工作。电话
18688372662 ; E-mail : rengl4cnooc.com.cn。万方数据