封隔器用橡胶密封材料在含H_(2)S和CO_(2)酸性环境中的适应性  

The Adaptability of Rubber Sealing Materials of Packers in Acidic Environments Containing H_(2)S and CO_(2)

作　　者：马英文 张明 龚宁[1,2] 张博 张智 李永雄[3] 钟显康 霍宏博 MA Yingwen;ZHANG Ming;GONG Ning;ZHANG Bo;ZHANG Zhi;LI Yongxiong;ZHONG Xiankang;HUO Hongbo(State Key Laboratory of Offshore Oil Exploitation,Tianjin 300459,China;CNOOC(China)Limited Tianjin Branch,Tianjin 300459,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu Sichuan 610500,China)

机构地区：[1]海洋石油高效开发国家重点实验室,天津300459 [2]中海石油(中国)有限公司天津分公司,天津300459 [3]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《润滑与密封》2023年第7期172-177,共6页Lubrication Engineering

基　　金：中海石油(中国)有限公司科技项目(YXKY-2020-TJ-03)。

摘　　要：随着高温、高压、含H_(2)S/CO_(2)油气田的不断开发,封隔器用橡胶材料的服役环境越来越苛刻。为研究橡胶密封材料在高温、高压含H_(2)S/CO_(2)环境中的适应性,在高压釜中模拟渤中19-6区块的地层环境,将氟硅、氟碳、氢化丁腈、四丙氟4种橡胶进行耐蚀性实验,采用扫描电子显微镜、电子拉力试验机、邵氏硬度计对橡胶材料暴露在模拟环境中前后的截面微观形貌、力学性能、硬度进行检测。实验结果表明:在模拟环境中橡胶的耐蚀性由高到低为氢化丁腈橡胶、四丙氟橡胶、氟碳橡胶、氟硅橡胶;氢化丁腈橡胶在模拟工况环境中性能最为稳定,这是由于其分子的不饱和键作为可硫化的交联点,在一定程度上增强了其耐腐蚀性能;四丙氟橡胶在气相中力学性能较液相中下降了约75%,CO_(2)的存在会加剧四丙氟橡胶的H_(2)S腐蚀;氟碳橡胶和氟硅橡胶腐蚀严重,不适合在该模拟工况下使用。With the continuous development of high-temperature,high-pressure,H_(2)S/CO_(2)-containing oil and gas fields,the service environment of rubber materials for packers is becoming more and more severe.To study the adaptability of rubber sealing materials in high temperature and high pressure environments containing H_(2)S/CO_(2),the stratum environment of Bozhong 19-6 block was simulated in an autoclave,and the corrosion resistance tests of four rubbers were carried out,including Fluorosilicone rubber(FVMQ),fluorocarbon rubber(FKM),hydrogenated nitrile rubber(HNBR)and tetrafluoroethylene-propylene elastomer(FERM).Electronic tensile testing machine and Shore hardness tester were used to test the cross-sectional micro-morphology,mechanical properties and hardness of the rubber material before and after exposure to the simulated environment.Experimental results show that the corrosion resistance of rubber in the simulated environment from high to low is HNBR,FEPM,FKM,FVMQ.HNBR has the most stable performance in the simulated working environment,which is due to the fact that the unsaturated bond of its molecules is used as a crosslinking point for vulcanization,which enhances its corrosion resistance to a certain extent.The mechanical properties of FEPM in the gas phase are reduced by about 75%compared with those in the liquid phase,and the presence of CO_(2) will aggravate the H_(2)S corrosion of FEPM.FKM and FVMQ are seriously corroded and are not suitable for use in this simulated working condition.

关 键 词：封隔器 橡胶 力学性能 适应性 

分 类 号：TG174[金属学及工艺—金属表面处理] TH145.41[金属学及工艺—金属学]