Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Corrosion-resistant agent, preparation method thereof and application of corrosion-resistant agent in cement
The invention discloses a corrosion-resistant agent, a preparation method thereof and application of the corrosion-resistant agent in cement, and relates to the technical field of oil and gas well cementation. The corrosion-resistant agent comprises basic zinc carbonate and a nano clay carrier. When the corrosion-resistant agent is used for preparing a well cementation cement slurry system resistant to high-temperature H2S coupled corrosion, basic zinc carbonate can react with H2S to generate an insoluble substance ZnS, ZnS is attached to the surface of a cement hydration product to form a corrosion-resistant protection layer, H2S is prevented from permeating into set cement, a certain protection effect is achieved, and the corrosion-resistant effect is good. And various properties of the cement stone after corrosion are improved. Meanwhile, in-situ growth of the basic zinc carbonate in pores of the nano-clay hinders dissolution of the basic zinc carbonate in the cement paste and slows down generation of Zn (OH) 2, so that adverse effects of the basic zinc carbonate on rheological properties and thickening properties of the cement paste are avoided. In addition, the nano clay can consume the hydration product calcium hydroxide of the cement through a pozzolanic reaction, so that the corrosion resistance of the set cement is improved.
本发明公开了一种耐腐蚀剂及其制备方法和在水泥中的应用，涉及油气井固井技术领域。所述耐腐蚀剂包括碱式碳酸锌和纳米黏土载体。本发明的耐腐蚀剂在制备耐高温－H2S耦合腐蚀固井水泥浆体系中，碱式碳酸锌可以与H2S发生反应，生成不溶物ZnS，ZnS在水泥水化产物表面的附着使其形成了一层耐蚀保护层，阻止了H2S向水泥石内部的渗透，起到了一定的保护作用，提高了水泥石腐蚀后各项性能。同时，碱式碳酸锌在纳米黏土孔隙中的原位生长，阻碍了其在水泥浆体中的溶解，减缓了Zn(OH)2的生成，进而避免了碱式碳酸锌对水泥浆体流变性及稠化性能的不利影响。此外，纳米黏土还可通过火山灰反应消耗水泥的水化产物氢氧化钙，进而达到提高水泥石抗腐蚀性能的提升。
Corrosion-resistant agent, preparation method thereof and application of corrosion-resistant agent in cement
The invention discloses a corrosion-resistant agent, a preparation method thereof and application of the corrosion-resistant agent in cement, and relates to the technical field of oil and gas well cementation. The corrosion-resistant agent comprises basic zinc carbonate and a nano clay carrier. When the corrosion-resistant agent is used for preparing a well cementation cement slurry system resistant to high-temperature H2S coupled corrosion, basic zinc carbonate can react with H2S to generate an insoluble substance ZnS, ZnS is attached to the surface of a cement hydration product to form a corrosion-resistant protection layer, H2S is prevented from permeating into set cement, a certain protection effect is achieved, and the corrosion-resistant effect is good. And various properties of the cement stone after corrosion are improved. Meanwhile, in-situ growth of the basic zinc carbonate in pores of the nano-clay hinders dissolution of the basic zinc carbonate in the cement paste and slows down generation of Zn (OH) 2, so that adverse effects of the basic zinc carbonate on rheological properties and thickening properties of the cement paste are avoided. In addition, the nano clay can consume the hydration product calcium hydroxide of the cement through a pozzolanic reaction, so that the corrosion resistance of the set cement is improved.
本发明公开了一种耐腐蚀剂及其制备方法和在水泥中的应用，涉及油气井固井技术领域。所述耐腐蚀剂包括碱式碳酸锌和纳米黏土载体。本发明的耐腐蚀剂在制备耐高温－H2S耦合腐蚀固井水泥浆体系中，碱式碳酸锌可以与H2S发生反应，生成不溶物ZnS，ZnS在水泥水化产物表面的附着使其形成了一层耐蚀保护层，阻止了H2S向水泥石内部的渗透，起到了一定的保护作用，提高了水泥石腐蚀后各项性能。同时，碱式碳酸锌在纳米黏土孔隙中的原位生长，阻碍了其在水泥浆体中的溶解，减缓了Zn(OH)2的生成，进而避免了碱式碳酸锌对水泥浆体流变性及稠化性能的不利影响。此外，纳米黏土还可通过火山灰反应消耗水泥的水化产物氢氧化钙，进而达到提高水泥石抗腐蚀性能的提升。
Corrosion-resistant agent, preparation method thereof and application of corrosion-resistant agent in cement
一种耐腐蚀剂及其制备方法和在水泥中的应用
LIU SHUJIE (Autor:in) / CHEN HAODONG (Autor:in) / LUO MING (Autor:in) / MA CHUANHUA (Autor:in) / JIANG DONGLEI (Autor:in) / LI WENTUO (Autor:in) / LIANG JIWEN (Autor:in) / XU YILONG (Autor:in) / WU YANHUI (Autor:in) / DAI RUI (Autor:in)
06.08.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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