改性纳米锂皂石强化高温泡沫调驱性能研究  

Study on Modified Nano-laponite to Enhance Profile Control and Flooding Performance of High-temperature Foam

作　　者：裴海华[1,2] 赵建伟 郑家桢 张贵才[1,2] 张菅[1,2] 蒋平 PEI Haihua;ZHAO Jianwei;ZHENG Jiazhen;ZHANG Guicai;ZHANG Jian;JIANG Ping(State Key Laboratory of Deep Oil and Gas,China University of Petroleum(East China),Qingdao 266580,Shandong,China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China)

机构地区：[1]深层油气全国重点实验室(中国石油大学(华东)),山东青岛266580 [2]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《材料导报》2025年第2期252-256,共5页Materials Reports

基　　金：国家重点研发计划(2018YFA0702400);山东省自然科学基金(ZR2019MEE085)。

摘　　要：利用烷基胺改性纳米锂皂石颗粒构建了高温泡沫体系,对其耐温耐盐性能进行评价,并通过非均质填砂管实验评价了高温泡沫体系对蒸汽的调驱性能。红外光谱表征和接触角测定结果证明了烷基胺通过吸附在纳米锂皂石颗粒表面将其润湿性由强亲水变成弱亲水,使其可以吸附在气液界面上,并形成固体颗粒界面膜,增强了泡沫液膜的刚性强度,从而达到提高泡沫稳定性目的。经烷基胺表面改性纳米锂皂石的稳泡能力得到大幅提升,质量分数1.0%改性纳米锂皂石颗粒可将泡沫的析液半衰期提高至275 min,且具有较好的耐温耐盐性能,在250℃和40000 mg/L的矿化度条件下能保持较好的泡沫稳定性。改性纳米锂皂石强化泡沫体系对高温蒸汽具有优异的调驱性能,在250℃条件的阻力因子在30以上,在非均质条件下可以有效调整蒸汽的吸汽剖面,扩大蒸汽的波及体积,进而大幅度提高蒸汽驱采收率。The high-temperature foam system was constructed by alkylamine modified nano-laponite,and its temperature-resistant and salt-resistant performance was evaluated.The steam profile control and flooding performance of the high-temperature foam system was evaluated by heterogeneous sandpack flooding tests.The results of infrared spectrum characterization and contact angle measurement show that the wettability of nano-laponite is changed from strong hydrophilic to weak hydrophilic by adsorbing alkylamine on the surface of nano-laponite,so that the modified nano-laponite can be adsorbed on the gas-liquid interface to form a solid particle interfacial film,which enhances the rigid strength of liquid film and improves the foam stability.The foam stability stabilized by alkylamine-modified nano-laponite can be greatly improved.The half-life of foam can be increased to 275 min by addition of 1.0%modified nano-laponite,and it has good temperature and salt resistance,which can maintain good foam stability at 250℃and 40000 mg/L salinity.The modified nano-laponite enhanced foam system has excellent profile control and flooding performance for high-temperature steam,and the resistance factor can reach more than 30 at 250℃.The modified nano-laponite enhanced foam system can effectively adjust the profile of steam injection,which resulting in increase of the sweep efficiency of steam flooding,and thus greatly improving the oil recovery of steam flooding in the heterogeneous formations.

关 键 词：高温泡沫 纳米锂皂石 表面改性 调驱性能 提高采收率 

分 类 号：TE357[石油与天然气工程—油气田开发工程]