抗多价阳离子降滤失剂的研发与性能评价  

Development and Performance Evaluation of Anti-multivalent Cationic Filtrate Reducer

作　　者：曹家俊 张永威 秦雨箐 余加水 余婷 朱丽敏 杨丽丽 CAO Jiajun;ZHANG Yongwei;QIN Yuqing;YU Jiashui;YU Ting;ZHU Limin;YANG Lili(Drilling Fluid Branch Company,WDEC Limited,PetroChina,Karamay,Xinjiang 834000,P R of China;National Engineering Research Center for Oli&Gas Drilling and Completion Technology,China University of Petroleum(Beijing),Beijing 102249,P R of China)

机构地区：[1]中国石油西部钻探钻井液分公司,新疆克拉玛依834000 [2]油气钻完井技术国家工程研究中心,中国石油大学(北京),北京102249

出　　处：《油田化学》2025年第1期8-13,共6页Oilfield Chemistry

基　　金：中国石油集团西部钻探工程有限公司“抗多价阳离子降滤失剂的研发”(项目编号HX20231039)。

摘　　要：油气勘探开发作业中地质情况复杂,盐膏层地层水矿化度极高,大量金属阳离子对水基钻井液黏度、降滤失性产生了严重的负面影响。为了解决这一问题,文章在两性离子聚合物的基础上引入支化剂制备了一种抗多价阳离子的两性离子超支化聚合物降滤失剂XZ-DJ2,通过实验探究了其最佳反应条件,并对其理化性质进行了一系列表征测试,测试了钻井液基浆加入XZ-DJ2后的流变性、降滤失性、抗盐性、粒径和Zeta电位。研究结果表明,向基浆中加入2%的XZ-DJ2后,Zeta电位从-31.9 m V变为-42.4 m V,Zeta电位绝对值上升,表明XZ-DJ2可提高体系的稳定性;在150℃下老化16 h前后的滤失量分别为5.6 mL和6 mL,与未加入XZ-DJ2的基浆滤失量(分别为26.6和31.8 mL)相比均有大幅下降,表明XZ-DJ2具有良好的降滤失性能。随着XZ-DJ2加量的增大,钻井液的黏度增大,滤失量略有降低。在30%Na Cl、30%KCl、5%Ca Cl_(2)、5%Mg Cl_(2)和1%Al_(2)(SO_(4))_(3)·18H_(2)O污染的情况下,钻井液的黏度明显降低,但滤失量(分别为6.3、6.2、5.2、6.8、7.0 mL)变化不大,保持良好的降滤失性能,表明XZ-DJ2具有优异的抗温性能和抗多价阳离子污染能力,且XZ-DJ2是通过提升滤饼致密性而非提升钻井液黏度来达到降滤失效果,有利于钻井提速,进一步节省钻井液作业成本。In oil and gas exploration and development operations,the geological conditions are complex,and the salinity of formation water in salt-gypsum layers is extremely high.A large number of metal cations have a serious negative impact on the viscosity and filtration reduction of water-based drilling fluids.In order to solve this problem,an anti-multivalent cation zwitterionic hyperbranched polymer filtrate reducer XZ-DJ2 was prepared by introducing a branching agent on the basis of zwitterionic polymer.The optimum reaction conditions were explored through experiments,and a series of characterization tests on its physical and chemical properties were carried out.The rheology,filtration loss reduction,salt resistance,particle size and Zeta potential of the drilling fluid base slurry after adding XZ-DJ2 were tested.The results showed that after adding 2%XZ-DJ2 into the base slurry,the Zeta potential changed from−31.9 mV to−42.4 mV,and the absolute value of Zeta potential increased,indicating that XZ-DJ2 could improve the stability of the system.The filtration loss before and after aging at the temperature of 150℃for 16 h was 5.6 mL and 6 mL,respectively,which was significantly lower than that of the base slurry without XZ-DJ2,being of 26.6 mL and 31.8 mL,respectively,indicating that XZ-DJ2 had good filtration loss reduction performance.With the increase of XZ-DJ2 dosage,the viscosity of drilling fluid increased and the filtration loss decreased slightly.After contaminated by 30%NaCl,30%KCl,5%CaCl_(2),5%MgCl_(2)and 1%Al_(2)(SO_(4))_(3)·18H_(2)O,the viscosity of the drilling fluid was significantly reduced,but the filtration loss change little,being of 6.3,6.2,5.2,6.8,7.0 mL,respectively,indicating that XZ-DJ2 had excellent temperature resistance and multivalent cation pollution resistance,and XZ-DJ2 achieved the fluid loss reduction effect by improving the compactness of the filter cake rather than improving the viscosity of the drilling fluid,which is conducive to drilling speed and further save drilling fluid op

关 键 词：矿化度 多价阳离子 降滤失剂 超支化 水基钻井液 

分 类 号：TE254.4[石油与天然气工程—油气井工程]