地面集输玻璃钢管结蜡原因与机理分析研究  

Analysis on the Causes and Mechanisms of Wax Formation in Ground Gathering and Transportation Fiberglass Pipes

作　　者：李磊 贾福生 孙坤 张欣欣 齐国权 李厚补 朱文峰 LI Lei;JIA Fusheng;SUN Kun;ZHANG Xinxin;QI Guoquan;LI Houbu;ZHU Wenfeng(State Key Laboratory of Oil and Gas Equipment,CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China;Hade Oil and Gas Production Management Zone of PetroChina Tarim Oilfield Company,Korla,Xinjiang 841000,China;Turpan Oil Production Management Zone of PetroChina Tuha Oilfield Company,Hami,Xinjiang 839000,China)

机构地区：[1]中国石油集团工程材料研究院有限公司,油气钻采输送装备全国重点实验室,陕西西安710077 [2]塔里木油田公司哈得采油气管理区,新疆库尔勒841000 [3]吐哈油田公司吐鲁番采油管理区,新疆哈密839000

出　　处：《石油管材与仪器》2024年第3期95-100,共6页Petroleum Tubular Goods & Instruments

基　　金：国家自然基金面上项目“基于气体渗透的热塑性塑料内衬管径向屈曲失效机制及定量风险评价研究”(编号:52274069);陕西省自然科学基础研究计划“注水油管用智能防腐环氧涂层的设计开发及防腐机理研究”(编号:2023-JC-QN-0433);中国石油天然气集团有限公司基础研究和战略储备技术研究基金项目“高分子材料结蜡机理及超双疏环氧复合材料研究”(编号:2023DQ03-05)。

摘　　要：某油田地面集输玻璃钢管线投产后出现蜡堵,严重影响油田正常生产。为了确定玻璃钢管结蜡原因与机理,从具有不同结蜡程度的3条在役玻璃钢管线截取试样,开展宏观检查、理化试验和润湿性分析等对比试验研究。结果表明,该3条玻璃钢管试样的成分结构、树脂含量、硬度和固化程度未见明显差异,符合玻璃钢管的标准要求,它们对柴油均表现为超亲油状态,润湿性未见明显差异。结蜡程度的不同主要是由管道运行温度所致,低流速、低气液比加速蜡沉积。玻璃钢管结蜡机理与钢质管道基本一致,为分子扩散机理,但玻璃钢管的临界表面张力、导热系数和粗糙度更低,使其不易发生蜡晶的沉积与聚集,展现出更佳的防结蜡性能。通过降低管材表面张力和实现疏油状态,将是提升玻璃钢管防结蜡性能的有效途径。After the production of a fiberglass pipeline for surface gathering and transportation in a certain oilfield,wax blockage occurred,seriously affecting the normal production of the oilfield.To clarify the causes and mechanisms of wax formation in fiberglass pipes,samples were taken from three in-service fiberglass pipelines with different degrees of wax formation,and comparative experimental studies were conducted,including macroscopic inspection,physical and chemical tests,and wettability analysis.The results showed that there were no significant differences in the composition structure,resin content,hardness,and curing degree of the three glass fiber reinforced plastic specimens,which met the standard requirements of glass fiber reinforced plasticpipe.They all showed a super lipophilic state towards diesel and no significant difference in wettability.The difference in wax deposition degree was mainly caused by the operating temperature of the pipeline,and low flow rate and low gas-liquid ratio accelerated wax deposition.The waxing mechanism of fiberglass pipes is basically the same as that of steel pipes,which is a molecular diffusion mechanism.However,the critical surface tension,thermal conductivity,and roughness of fiberglass pipes are lower,making them less prone to wax crystal deposition and aggregation,demonstrating better anti-waxing performance.Reducing the surface tension of the pipe and achieving an oil repellent state will be an effective way to improve the anti-waxing performance of fiberglass pipes.

关 键 词：集输管线 含蜡原油 玻璃钢管 结蜡原因 结蜡机理 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]