海水基交联型聚合物压裂液的研究与应用  

RESEARCH AND APPLICATION OF SEAWATER-BASED POLYMER FRACTURING FLUID

作　　者：丁秋炜 周柄男[1,2] 张昕 张宇 滕大勇 陈庆栋 周际永[1,3] Ding Qiuwei;Zhou Bingnan;Zhang Xin;Zhang Yu;Teng Dayong;Chen Qingdong;Zhou Jiyong(CNOOC Tianjin Chemical Research&Design Institute,Tianjin 300452;CNOOC Energy Technology&Services Limited Key Laboratory for Exploration&Development of Unconventional Resources,Tianjin 300452;CNOOC Energy Technology&Services Limited Key Laboratory for Enhanced Oil Recovery,Tianjin 300452)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452 [2]中海油能源发展股份有限公司非常规勘探开发重点实验室,天津300452 [3]中海油能源发展股份有限公司提高采收率重点实验室,天津300452

出　　处：《精细石油化工》2025年第2期6-10,共5页Speciality Petrochemicals

基　　金：国家科技重大专项课题(2024ZD1404702);中海油能源发展股份有限公司科技重大专项课题(HFKJ-ZX-GJ-2023-02)。

摘　　要：以醇胺化合物、乳酸钠、氧氯化锆等为主要原料,合成了一种复合有机锆交联剂,并与自制的乳液型聚丙烯酰胺组合制备了适用于海上压裂的海水基交联型聚合物压裂液。通过红外和核磁光谱表征了复合有机锆交联剂结构。考察了海水基交联型聚合物压裂液的耐温耐剪切性能、黏弹性、滤失性能以及静态携砂性能。实验结果表明:由1.2%乳液型聚丙烯酰胺和0.4%复合有机锆交联剂组成的海水基交联型聚合物压裂液在110℃、剪切速率170 s^(-1)条件下剪切120 min后,黏度可达50 mPa·s以上;滤失系数为0.525×10^(-3) m/min 1/2;静态携砂120 min无沉降,综合性能优于海水基胍胶压裂液。海水基交联型聚合物压裂液在中国南海东部某油田进行了现场应用,施工排量2.5 m^(3)/min,最高砂比42%,取得了良好的应用效果。A composite organic zirconium crosslinking agent was synthesized with alcohol amine compounds,sodium lactate,and zirconium oxychloride as main raw materials,and was combined with a self-made emulsion-type polyacrylamide to form a seawater-based crosslinked polymer fracturing fluid suitable for offshore fracturing.The structure of the composite organic zirconium crosslinking agent was characterized by infrared and nuclear magnetic resonance spectroscopy.The temperature and shear resistance,viscoelasticity,filtration performance,and static sand-carrying capacity of the seawater-based crosslinked polymer fracturing fluid were investigated.The experimental results showed that the viscosity of seawater-based crosslinked polymer fracturing fluid composed of 1.2%emulsion-type polyacrylamide and 0.4%composite organic zirconium crosslinking agent could reach more than 50 mPa·s after 120 minutes shearing at 110℃with a shear rate of 170 s^(-1);the filtration coefficient was 0.525×10^(-3) m/min 1/2;there was no sedimentation after static sand carrying for 120 min.The comprehensive performance of seawater based cross-linked polymer fracturing fluid is superior to that of seawater based guar gum fracturing fluid.The seawater-based crosslinked polymer fracturing fluid was applied on-site in an oilfield in the eastern South China Sea,with a construction displacement of 2.5 m^(3)/min and a maximum sand ratio of 42%,achieving good application results.

关 键 词：聚合物压裂液 海水基压裂液 海上压裂 交联剂 

分 类 号：TE357[石油与天然气工程—油气田开发工程]