油井水泥石增强用材料的合成及性能研究
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中国石化 石油工程技术研究院

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国家科技重大专项课题《彭水地区常压页岩气勘探开发示范工程》(项目编号2016ZX05061)和中石化科研前瞻项目《具有分子键合作用的水泥石增强材料研制》(项目编号P18006-1)部分研究内容。


Synthesis and Properties of a MultipStudy on Synthesis and properties of reinforced materials for oil well cement
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    摘要:

    本文以二苯基甲烷二异氰酸酯(MDI)、聚环氧丙烷二醇、硅酸盐水溶液、重质碳酸钙等为原料合成了一种多相颗粒材料,用于油井水泥石降低弹性模量。多相颗粒第一相是多孔洞状连续相,第二相呈球状;多相颗粒中第二相嵌合于第一相的孔洞之内,且球状第二相中含有18~20%的Si元素。实验表明:含多相颗粒水泥石相较净浆水泥石具有更低的弹性模量,且强度不降低;多相颗粒对水泥浆的稠化时间和流变性影响较小;多相颗粒界面的球型结构含有大量硅羟基参与或部分参与了水泥的水化,与水泥石在界面处形成完整的结构,保证了水泥水化结构的连续性。

    Abstract:

    In this paper, a heterogeneous particle was synthesized from diphenylmethane diisocyanate (MDI), polyepoxypropane glycol, silicate aqueous solution and heavy calcium carbonate, which was used to reduce the elastic modulus of oil well cement. The first phase of multiphase particles is a porous continuous phase, and the second phase is basically spherical; In the multiphase particles, the second phase is embedded in the holes of the first phase, and the spherical second phase contains 18 ~ 20% Si element. The experimental results show that the cement stone with multiphase particles has lower elastic modulus than that of neat paste cement stone, but the strength does not decrease; Multiphase particles have little effect on the thickening time and rheology of cement slurry; The spherical structure at the interface of multiphase particles contains a large number of silicon hydroxyl groups, which participate or partially participate in the hydration of cement, forming a permeable structure at the interface to ensure the continuity of cement hydration structure.

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历史
  • 收稿日期:2021-10-11
  • 最后修改日期:2021-11-17
  • 录用日期:2021-11-23
  • 在线发布日期: 2022-02-11
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