中文摘要：

本文采用人工配制的油田回注水,模拟研究纤维素酶添加后对管材结垢的影响。试验采用四个平行反应器,对比研究了纤维素酶浓度对模拟油田回注水中Ca~（2＋）浓度和总碱度的影响,同时采用X射线衍射仪分析了纤维素酶浓度对模拟回注水系统结垢产物的影响,此外还采用扫描电镜观察了不同纤维素酶浓度下,模拟油田回注水系统结垢产物的晶形差异,并初步探讨了纤维素酶对回注水系统阻垢的可能机理。结果表明：当纤维素酶的质量比浓度为0~1.05%时,纤维素酶对铸铁试样片的阻垢随着酶浓度的提高而增强;在0.349%（w/w）的酶浓度条件下,结垢产物为CaCO_3,随着酶浓度的继续升高,晶体态结垢产物未能检出。扫描电镜结果表明：酶添加在一定程度上会引起结垢产物的晶格畸变,这可能是纤维素酶对模拟回注水系统阻垢的机理之一。

英文摘要：

The effect of cellulase addition on the scale inhibiting in the simulating re-injection water system is studied by using four parallel reactors.The concentration variation of calcium ion and total alkalinity is measured during the process of the experiment,where the different quantities of cellulase are added in the reactors.X-ray diffractometer is used to analyze scaling products crystal and scanning electron microscopy is adopted to observe the scaling morphology with the different concentrations of cellulase addition in the simulating re-injection water system.Based on the above,the paper proposes the possible mechanism of scale inhibiting in the re-injection water system by adding cellulase.Results show that the scale inhibition becomes stronger with the different weight to weight ratio concentration of cellulase added in the simulating re-injection water system,ranging from 0to 1.05%.Meanwhile the main scaling product is calcium carbonate while the cellulase weight to weight ratio concentration in the simulating re-injection water system is 0.349%.However,the crystal form of scaling product disappears when the cellulase concentrations continue to rise in the simulating re-injection water system.The study also indicates that cellulase addition may lead to lattice distortion,apossible mechanism of scale inhibiting in the re-injection water.