摘要
以苯乙烯、甲基丙烯酸类吸附单体为原料,采用半连续乳液聚合法合成了纳米封堵剂NanoZJS-1。利用FTIR、SEM、TG和粒径分析等方法表征了NanoZJS-1的结构。表征结果显示,NanoZJS-1呈球形,粒径分布20~300 nm,热稳定性好。对NanoZJS-1进行了封堵性能和吸附性能评价。实验结果表明,加入1.0%(w)NanoZJS-1的油基钻井液破乳电压基本不变,高温高压滤失量降低;NanoZJS-1可封堵微孔隙及微裂缝。在NanoZJS-1溶液中热滚后,龙马溪岩心表面从亲水变为疏水,可阻止滤液等进入地层,有利于解决页岩井壁稳定问题。
The nano plugging agent NanoZJS-1 was synthesized by semicontinuous emulsion polymerization using styrene and methacrylic acid adsorbent monomer as materials.The structure of NanoZJS-1 was characterized by FTIR,SEM,TG and particle size analysis.The characterization results showed that the NanoZJS-1 was spherical shape and the particle size distribution was 20-300 nm,and had good thermal stability.The plugging and adsorption capabilities of NanoZJS-1 were evaluated.The experimental results indicated that the demulsification voltage of the oil-based drilling fluid with 1.0%(w)NanoZJS-1 was almost unchanged,and the high temperature and high pressure filtration loss was reduced.NanoZJS-1 could seal micro pores and micro cracks.After hot rolling in NanoZJS-1 solution,the surface of Longmaxi core changed from hydrophilic to hydrophobic,which could prevent the filtrate from entering the formation,and it was conducive to solving the problem of shale wellbore stability.
作者
黎然
刘玉娥
张军
黄坤
林强
王俊凯
Li Ran;Liu Yu’e;Zhang Jun;Huang Kun;Lin Qiang;Wang Junkai(Engineering Technology Research Institute,PetroChina Southwest Oil and Gasfield Company,Chengdu Sichuan 610017,China;Research Institute of Petroleum Exploration&Development,PetroChina Southwest Oil and Gasfield Company,Beijing 100083,China;Exploration Division,PetroChina,Chengdu Sichuan 610041,China;Sichuan ShengNuo Oil and Gas Engineering Technology Service Co.,Ltd.,Chengdu Sichuan 610017,China)
出处
《石油化工》
CAS
CSCD
北大核心
2021年第9期934-939,共6页
Petrochemical Technology
基金
西南油气田分公司项目(1719A000503002)。
关键词
页岩气
井壁稳定
纳米封堵剂
吸附
shale gas
wellbore stability
nano plugging agent
adsorption
