Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Composition and application of low-temperature and hydration synergistic low-heat early-strength cement slurry system
The invention discloses composition and application of a low-temperature and hydration synergistic low-heat early-strength cement slurry system. The low-heat early-strength cement slurry system is prepared from the following components in parts by weight: 100 parts of oil well cement, 70-100 parts of a low-hydration-heat active cementing material, 3.2-6.3 parts of a hydrated calcium silicate-polycarboxylic acid ether nano composite early strength agent, 1.8-5.4 parts of a low-temperature activator, 0.7-1.3 parts of a fluid loss agent, 0.3-0.6 part of a dispersing agent, 0.2-1.0 part of a defoaming agent, 15-20 parts of hollow glass beads and 60-92 parts of water. According to the cement slurry system, on the basis that a low-hydration-heat-activity cementing material is selected, the hydrated calcium silicate-polycarboxylate ether nano-composite early strength agent and the low-temperature activating agent are adopted and have a synergistic effect, and the compressive strength of set cement in the curing period is jointly promoted; and the cement slurry system has the characteristics of being small in hydration heat release, high in early strength and the like, and meanwhile, has the advantages of adjustable density, adjustable thickening time, good rheological property, low filter loss, short setting waiting time and the like, is suitable for well cementation of ocean deepwater surface layers and hydrate layers, and lays a solid foundation for development of ocean oil and gas resources.
本发明公开了一种低温协同水化增效的低热早强水泥浆体系组成与应用，其中低热早强水泥浆体系按重量计，包括：油井水泥100份，低水化热活性胶凝材料70～100份，水化硅酸钙‑聚羧酸醚纳米复合早强剂3.2～6.3份，低温激活剂1.8～5.4，降失水剂0.7～1.3份，分散剂0.3～0.6份，消泡剂0.2～1.0份，空心玻璃微珠15～20份，水60～92份。本发明的水泥浆体系在选取低水化热活性胶凝材料的基础上，采用水化硅酸钙‑聚羧酸醚纳米复合早强剂与低温激活剂，两者协同增效，共同促进水泥石在养护龄期内的抗压强度，具有水化放热小、早期强度高等特点，同时兼具密度可调、稠化时间可调、流变性能好、滤失量少、候凝时间短等优点，适用于海洋深水表层和水合物层固井，为海洋油气资源开发奠定了坚实基础。
Composition and application of low-temperature and hydration synergistic low-heat early-strength cement slurry system
The invention discloses composition and application of a low-temperature and hydration synergistic low-heat early-strength cement slurry system. The low-heat early-strength cement slurry system is prepared from the following components in parts by weight: 100 parts of oil well cement, 70-100 parts of a low-hydration-heat active cementing material, 3.2-6.3 parts of a hydrated calcium silicate-polycarboxylic acid ether nano composite early strength agent, 1.8-5.4 parts of a low-temperature activator, 0.7-1.3 parts of a fluid loss agent, 0.3-0.6 part of a dispersing agent, 0.2-1.0 part of a defoaming agent, 15-20 parts of hollow glass beads and 60-92 parts of water. According to the cement slurry system, on the basis that a low-hydration-heat-activity cementing material is selected, the hydrated calcium silicate-polycarboxylate ether nano-composite early strength agent and the low-temperature activating agent are adopted and have a synergistic effect, and the compressive strength of set cement in the curing period is jointly promoted; and the cement slurry system has the characteristics of being small in hydration heat release, high in early strength and the like, and meanwhile, has the advantages of adjustable density, adjustable thickening time, good rheological property, low filter loss, short setting waiting time and the like, is suitable for well cementation of ocean deepwater surface layers and hydrate layers, and lays a solid foundation for development of ocean oil and gas resources.
本发明公开了一种低温协同水化增效的低热早强水泥浆体系组成与应用，其中低热早强水泥浆体系按重量计，包括：油井水泥100份，低水化热活性胶凝材料70～100份，水化硅酸钙‑聚羧酸醚纳米复合早强剂3.2～6.3份，低温激活剂1.8～5.4，降失水剂0.7～1.3份，分散剂0.3～0.6份，消泡剂0.2～1.0份，空心玻璃微珠15～20份，水60～92份。本发明的水泥浆体系在选取低水化热活性胶凝材料的基础上，采用水化硅酸钙‑聚羧酸醚纳米复合早强剂与低温激活剂，两者协同增效，共同促进水泥石在养护龄期内的抗压强度，具有水化放热小、早期强度高等特点，同时兼具密度可调、稠化时间可调、流变性能好、滤失量少、候凝时间短等优点，适用于海洋深水表层和水合物层固井，为海洋油气资源开发奠定了坚实基础。
Composition and application of low-temperature and hydration synergistic low-heat early-strength cement slurry system
低温协同水化增效的低热早强水泥浆体系组成与应用
WANG CHENGWEN (Autor:in) / YANG SHENGJIAN (Autor:in) / ZHANG HUI (Autor:in) / XUE YUCHENG (Autor:in)
19.10.2021
Patent
Elektronische Ressource
Chinesisch
Early strength foam cement slurry for well cementation
| Europäisches Patentamt | 2015