KF-96可溶镁合金溶解性能和机理  

Solubility and Mechanism of KF-96 Soluble Magnesium Alloy

作　　者：汪雄雄[1,2] 肖述琴[1,2] 杨旭东[1,2] 田伟[1,2] 卫亚明[1,2] WANG Xiongxiong;XIAO Shuqin;YANG Xudong;TIAN Wei;WEI Yaming(Oil&Gas Technology Research Institute,Changqing Oil Filed Company,PetroChina,Xi′an 710021,China;State Engineering Laboratory for Exploration Development of Low-Permeability Oil and Gas Fields,Xi′an 710021,China)

机构地区：[1]长庆油田分公司油气工艺研究院,西安710021 [2]低渗透油气田勘探开发国家工程实验室,西安710021

出　　处：《有色金属工程》2022年第12期28-35,共8页Nonferrous Metals Engineering

摘　　要：节流器失效率高、打捞困难,严重影响了气井产气效率。采用可溶镁合金制作为节流器的关键零部件,在服役期过后使其自行溶解于地层水环境中,能够有效地稳定产气效率。采用SEM-EDS、SKPFM、腐蚀电化学等手段,从温度、压力和溶解时间对KF-96可溶镁合金溶解性能的影响进行了研究,并从腐蚀电化学的角度探讨了可溶镁合金的溶解机理。结果表明,合金中的第二相GdMg_(2)是其溶解性能提升的关键,温度和压力是影响可溶镁合金溶解速率的决定性因素,压力对溶解速率的影响更为显著。The high failure rate of the choke and the difficulty in fishing seriously affect the gas production efficiency of the gas well.The use of soluble magnesium alloy as the key component of the throttle can effectively stabilize the gas production efficiency by making it self-dissolve in the formation water environment after the service life.The effects of temperature,pressure and dissolution time on the solubility of KF-96 soluble magnesium alloy were studied by means of SEM-EDS,SKPFM and corrosion electrochemistry,and the dissolution mechanism of the soluble magnesium alloy was discussed from the perspective of corrosion electrochemistry.The results show that the second phase GdMg_(2) in the alloy is the key to improve its solubility,temperature and pressure are the decisive factors affecting the dissolution rate of soluble magnesium alloys,and pressure has a more significant effect on the dissolution rate.

关 键 词：可溶镁合金 腐蚀 GdMg_(2) 溶解速率 

分 类 号：TG146.22[一般工业技术—材料科学与工程]