乌式黏度计法在固井聚合物外加剂耐温能力评价中的应用研究  

APPLICATION OF UBBELOHDE VISCOMETER METHOD IN TEMPERATURE RESISTANCE EVALUATION OF CEMENTING POLYMER ADDITIVES

作　　者：辜涛 郑有成[3] 郑友志[1,4] 郭小阳 夏宏伟[1,4] 杨涛 焦利宾 王福云 GU Tao;ZHENG Youcheng;ZHENG Youzhi;GUO Xiaoyang;XIA Hongwei;YANG Tao;JIAO Libin;WANG Fuyun(Engineering Technology Research Institute,PetroChina Southwest Oil&Gas Field Company,Guanghan,Sichuan 618300,China;PetroChina Southwest Oil&Gas Field Company,Chengdu,Sichuan 610000,China;National Research and Development Center for High-sulfur Gas Reservoir Exploitation,Guanghan,Sichuan 618300,China;State Key Laboratory for Oil&Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China)

机构地区：[1]西南油气田公司工程技术研究院 [2]油气藏地质及开发工程国家重点实验室·西南石油大学 [3]西南油气田公司 [4]国家能源高含硫气藏开采研发中心

出　　处：《钻采工艺》2020年第S01期81-84,I0005,共5页Drilling & Production Technology

基　　金：中国石油西南油气田公司科研项目“川渝地区超高温储层固井水泥环关键性能研究”(编号:20190302-16);“川渝地区环空憋压技术研究”(编号:20180302-03);中国石油集团公司重大科技项目“8000m级复杂超深井优快钻完井技术集成与应用”(编号:2019D-4210)。

摘　　要：外加剂是水泥浆性能调控的基础,超高温条件对固井外加剂的耐温能力提出了极高的要求。因此,要确保高温深井固井安全和质量的首要前提就是优选耐温能力良好的聚合物外加剂。文章从聚合物的本质特性出发,借助乌式黏度计测聚合物分子量方法,通过对比分析聚合物外加剂在高温作用前后的“黏度-分子量”变化,对三种聚合物降失水剂和三种聚合物缓凝剂开展了评价优选,并通过水泥浆实验验证了评价结果的有效性。实验结果表明,降失水剂C和缓凝剂H在经180℃高温热处理前后,分子量变化最小,具有较好的耐温能力,水泥浆评价结果与采用乌式黏度计法得出的评价结果相符。Additives are the foundation of cement slurry performance.The ultra high temperature condition requires high temperature resistance of cementing additives.Therefore,to ensure the safety and quality of high temperature deep well cementing,the prerequisite is to select polymer additive with good temperature resistance.In this paper,based on the essential characteristic of polymer admixtures,the temperature resistance of three polymer filtrate reducers and three polymer retarders are evaluated by using Ubbelohde viscometer method and the change of viscosity of polymer additives before and after high temperature treatment is analyzed.In addition,the evaluation results are verified by the test results of cement slurry performance.The experimental results show that the molecular weight of filtrate reducer C and retarder H change the least before and after the high-temperature heat treatment at 180℃,and the slurry performance testing results are consistent with the evaluation results obtained by using Ubbelohde viscometer.

关 键 词：聚合物 固井外加剂 耐温能力 乌式黏度计 

分 类 号：TE256.6[石油与天然气工程—油气井工程]