【摘要】：采用具有架裝結(jié)構(gòu)能夠吸附并儲存交聯(lián)劑的硅鋁酸鹽礦物作為剛性內(nèi)核,以丙烯酰胺和丙烯酸為主要聚合單體,以N,N-亞甲基雙丙烯酰胺為交聯(lián)劑,以過硫酸銨-亞硫酸氫鈉氧化還原體系為引發(fā)劑,通過甲基丙烯酸十二烷酯引入疏水基團(tuán),采用水溶液聚合法制備了一種內(nèi)剛外柔堵劑。通過靜態(tài)性能評價(jià)實(shí)驗(yàn)對內(nèi)剛外柔堵劑的吸水膨脹性能、耐溫抗鹽性能、封堵性能進(jìn)行考察,結(jié)果表明:內(nèi)剛外柔堵劑可吸水體積膨脹6.0倍,質(zhì)量膨脹12.0倍,吸水飽和時(shí)間大約10 h;在高鹽條件下(50 g/L氯化鈉溶液、10 g/L氯化鈣溶液),吸水膨脹倍數(shù)變化不大,具有良好的耐鹽性能;具有良好的耐溫性能,耐溫可達(dá)200℃;具有彈性變形推進(jìn)和可進(jìn)行二次封堵的優(yōu)點(diǎn),其封堵率可達(dá)99.5%,經(jīng)過10 PV的沖刷后,封堵率仍可達(dá)到96.7%,封堵效果良好。現(xiàn)場試驗(yàn)3口蒸汽吞吐井,1口蒸汽驅(qū)井,均取得了良好的調(diào)堵增油效果。
[Abstract]:Aluminosilicate minerals with scaffold structure capable of adsorbing and storing crosslinking agent were used as rigid core, acrylamide and acrylic acid as main polymerization monomer, NN- methylene bisacrylamide as crosslinking agent, An internal rigid and external flexible plugging agent was prepared by aqueous solution polymerization using ammonium persulfate sodium bisulfite redox system as initiator and dodecyl methacrylate as hydrophobic group. Through the static performance evaluation experiment, the water swelling performance, temperature resistance and salt resistance, plugging performance of the inner rigid external flexible plugging agent were investigated. The results showed that the internal rigid external flexible plugging agent could expand 6.0 times in volume and 12.0 times in mass. The saturation time of water absorption is about 10 h; Under the condition of high salt (50 g / L NaCl solution, 10 g / L calcium chloride solution), the swelling ratio of water is not changed much and has good salt resistance, and has good temperature resistance, up to 200 鈩，

本文編號：2396388