抗高温抗盐水基降滤失剂的合成与性能评价  

Synthesis and Performance Evaluation of High Temperature and Salt Water Resistant Filter Loss Additives

作　　者：李保陆 白杨[1,3] 王瑞芳[2] 陈新 李道雄 吴凌风 王海波 Li Baolu;Bai Yang;Wang Ruifang;Chen Xin;Li Daoxiong;Wu Lingfeng;Wang Haibo(State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China;School of Petroleum Engineering,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]油气藏地质及开发工程国家重点实验室-西南石油大学,四川成都610500 [2]西南石油大学新能源与材料学院,四川成都610500 [3]西南石油大学石油与天然气工程学院,四川成都610500

出　　处：《广东化工》2024年第5期9-13,共5页Guangdong Chemical Industry

基　　金：国家自然基金:面上项目(52274008);国家重点研发计划课题“井筒稳定性闭环响应机制与智能调控方法”(2019YFA0708303);中国石油-西南石油大学创新联合体科技合作项目(2020CX040102,2020CX040201)。

摘　　要：针对现有水基钻井液用降滤失剂抗高温和抗盐能力不足的问题,提出以腐植酸钠(Na Hm)、N,N-二甲基丙烯酰胺(NNDMA)、二甲基二烯丙基氯化铵(DMAAC)、对苯乙烯磺酸钠(SSS)为单体,过硫酸铵为引发剂,通过水溶液自由基聚合制备了一种抗高温抗盐降滤失剂。采用正交实验确定最佳反应条件:m(Na Hm∶NNDMA∶DMDAAC∶SSS)=2∶6∶2∶2,单体浓度30%,引发剂加量1.0%,反应温度65℃。利用红外光谱、热失重、核磁共振氢谱及环境扫描电镜对产物进行了结构表征和分析,证明四元聚合物制备成功,并通过抗高温、抗盐性能评价以及和市面常用产品对比,实验发现所合成的降滤失剂具有良好的抗高温抗盐性能,230℃老化16 h后,中压滤失量为5 m L,高温高压滤失量为22 m L,抗Na Cl 25%,抗Ca Cl21.5%,在高温高盐水基钻井液中具有广阔的应用前景。In response to the problem of insufficient high-temperature and salt resistance of existing water-based drilling fluid loss reducers,a high-temperature and salt resistant loss reducer was prepared by free radical polymerization of aqueous solution using sodium humate,N,N-dimethylacrylamide(NNDMA),diallyl dimethyl ammonium chloride(DMAAC),sodium styrene sulfonate(SSS)as monomers,and ammonium persulfate as initiator.The optimal reaction conditions were determined using orthogonal experiments:m(NaHm∶NNDMA∶DMDAAC∶SSS)=2∶6∶2∶2,monomer concentration of 30%,initiator dosage of 1.0%,and reaction temperature of 65℃.The structure of the product was characterized and analyzed using infrared spectroscopy,thermogravimetric analysis,nuclear magnetic resonance hydrogen spectroscopy,and environmental scanning electron microscopy,proving the successful preparation of the quaternary polymer.Through comparison with commonly used products on the market in terms of high temperature and salt resistance,it was found that the synthesized product has good high temperature and salt resistance.After aging at 230℃ for 16 hours,the medium pressure filtration loss was 5 mL,the high temperature and high pressure filtration loss was 22 mL,the resistance to NaCl reached 25%,and the resistance to CaCl_(2) reached 1.5%,It has broad application prospects in high-temperature and high salinity drilling fluids.

关 键 词：水基钻井液 降滤失剂 抗高温 抗盐 聚合物 

分 类 号：TE254.4[石油与天然气工程—油气井工程]