【摘要】 本文探讨了由适当比例的普通油井水泥、矾土水泥、石膏和膨润土组成的油井膨胀水泥,在不同水热条件下的物理力学性能、膨胀性能和不透水性能,及其影响因素。相分析证明,提高水热温度以及延长水热处理时间,均能加速一硫酸盐型水化硫铝酸钙的形成。最后,讨论了水泥石膨胀的产生。更多还原

【Abstract】 An oil-well expansive cement containing an appropriate mixture of normal oil-wellcement, alumina cement, gypsum and bentonite was cured under various hydrothermal con-ditions and the mechanical, expansive and water permeability properties there of wereinvestigated. From phase analysis, it has been ascertained that the formation of monosulfo-aluminate hydrate was accelerated by increasing the temperature and by prolonging thecuring time. The mechanism of expansion of the cement was also discussed in the paper.更多还原