【摘要】 从水泥化学角度出发，运用热力学理论计算了湿环境下油井水泥石中熟料矿物及水化产物在２５℃至２２７℃范围内受气相和液相ＣＯ２侵蚀的条件，讨论了碳化反应对水泥石抗压强度和渗透率的影响。结果表明：ＣＯ２对氢氧化钙（ＣＨ）及不同形态水化硅酸钙（ＣＳＨ）的腐蚀程度不同，笼统地判断ＣＳＨ和ＣＨ何者更易碳化是不科学的。更多还原

【Abstract】 The reaction of principal silicate hydrates and remained clinker minerals of oilwell cement during CO2 attact are introduced and the Gibbs free energy GT of these carbonation reactions and the CO2 partial pressure in gas phase and the value lg in aqueous solution reactions are calculated using the thermodynamical data published previously. The influences of CO2 corrosion on compressive strength and permeability of setted oilwell cement are also analyzed. It is shown that CO2 attacks on portlandite and various sorts of hydrated silicates differently and it is impossible to state simply whether CH or CSH is preferentially carbonated.更多还原