本文選題：壓裂液 + 聚乙烯醇�。� 參考：《油田化學(xué)》2017年01期

【摘要】：為提高聚乙烯醇?jí)毫岩耗蜏乜辜羟行阅?采用改性纖維素與聚乙烯醇的共混物作為稠化劑、有機(jī)鈦為交聯(lián)劑制備改性聚乙烯醇?jí)毫岩?研究了共混改性聚乙烯醇稠化劑的組成、壓裂液中稠化劑與交聯(lián)劑濃度、溫度、pH值對(duì)壓裂液性能的影響,對(duì)比了聚乙烯醇?jí)毫岩号c改性聚乙烯醇?jí)毫岩旱哪蜏乜辜羟行阅堋＝Y(jié)果表明:采用改性纖維素對(duì)聚乙烯醇稠化劑進(jìn)行共混改性,可提高稠化劑的增黏能力和所配制的壓裂液耐溫抗剪切性能,稠化劑中改性纖維素含量以40%為宜;改性聚乙烯醇?jí)毫岩旱慕M成和pH值對(duì)壓裂液性能影響顯著,適宜的改性聚乙烯醇?jí)毫岩号浞綖?稠化劑加量1.8%~2%、交聯(lián)劑加量0.9%~1%、pH值7~9,該改性聚乙烯醇?jí)毫岩涸?20℃、剪切速率170 s~(-1)下連續(xù)剪切90 min后的黏度仍可保持在50 mPa·s以上,能滿足油藏溫度低于120℃油層的應(yīng)用要求。
[Abstract]:In order to improve the temperature and shear resistance of polyvinyl alcohol fracturing fluid, the blend of modified cellulose and polyvinyl alcohol was used as thickener and organic titanium was used as crosslinking agent to prepare modified polyvinyl alcohol fracturing fluid. The composition of blend modified polyvinyl alcohol thickener was studied. The effects of thickener, crosslinking agent concentration, temperature and pH value on the properties of fracturing fluid were studied. The temperature and shear resistance of polyvinyl alcohol fracturing fluid and modified polyvinyl alcohol fracturing fluid were compared. The results showed that the viscosity increasing ability of the thickener and the temperature resistance and shear resistance of the fracturing fluid prepared by blending the modified cellulose with polyvinyl alcohol thickener could be improved, and the suitable content of modified cellulose in the thickener was 40%. The composition and pH value of the modified polyvinyl alcohol fracturing fluid have a significant effect on the performance of the fluid. The suitable formula of modified polyvinyl alcohol fracturing fluid is as follows: the thickener dosage is 1.8 / 2, the cross-linking agent is 0.9 and the pH value is 7 / 9. The modified polyvinyl alcohol fracturing fluid is at 120 鈩，

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