Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-strength silicate cement paste for ultrahigh-temperature well cementation as well as preparation method and application of high-strength silicate cement paste
The invention provides high-strength silicate cement paste for ultrahigh-temperature well cementation as well as a preparation method and application of the high-strength silicate cement paste. The cement paste comprises the following components in parts by weight: 100 parts of Portland cement, 4-6 parts of a high-temperature anti-cracking material, 80-105 parts of a high-temperature reinforcing material, 70-78 parts of water, 0.5-1.5 parts of a dispersing agent, 1-3 parts of a fluid loss agent, 0.5-2.5 parts of a retarder and 0.2-0.5 part of a defoaming agent, wherein the high-temperature reinforcing material is a combination of pickled quartz sand, metakaolin and aluminum sulfate, or a combination of pickled quartz sand, metakaolin, feldspar and sodium sulfate, or a combination of pickled quartz sand, metakaolin, feldspar and calcium nitrite. The cement paste has the characteristics of good sedimentation stability, fast strength development at low temperature, high set cement compressive strength at high temperature of 600 DEG C, and stable long-term high-temperature compressive strength development, and meets the field application requirements of heavy oil fireflooding thermal production wells and coal gasification operation wells.
本发明提供了一种超高温固井用高强硅酸盐水泥浆及其制备方法与应用。以重量份计，该水泥浆的成分组成包括：100份硅酸盐水泥，4‑6份高温防裂材料，80‑105份高温增强材料，70‑78份水，0.5‑1.5份分散剂，1‑3份降失水剂，0.5‑2.5份缓凝剂，0.2‑0.5份消泡剂；其中，所述高温增强材料为酸洗石英砂、偏高岭土、硫酸铝的组合，或者，酸洗石英砂、偏高岭土、长石、硫酸钠的组合，或者，酸洗石英砂、偏高岭土、长石、亚硝酸钙的组合。该水泥浆具有沉降稳定性好，低温下强度发展快，600℃高温下水泥石抗压强度高，且长期高温抗压强度发展稳定的特点，满足稠油火驱热采井和煤气化作业井的现场应用要求。
High-strength silicate cement paste for ultrahigh-temperature well cementation as well as preparation method and application of high-strength silicate cement paste
The invention provides high-strength silicate cement paste for ultrahigh-temperature well cementation as well as a preparation method and application of the high-strength silicate cement paste. The cement paste comprises the following components in parts by weight: 100 parts of Portland cement, 4-6 parts of a high-temperature anti-cracking material, 80-105 parts of a high-temperature reinforcing material, 70-78 parts of water, 0.5-1.5 parts of a dispersing agent, 1-3 parts of a fluid loss agent, 0.5-2.5 parts of a retarder and 0.2-0.5 part of a defoaming agent, wherein the high-temperature reinforcing material is a combination of pickled quartz sand, metakaolin and aluminum sulfate, or a combination of pickled quartz sand, metakaolin, feldspar and sodium sulfate, or a combination of pickled quartz sand, metakaolin, feldspar and calcium nitrite. The cement paste has the characteristics of good sedimentation stability, fast strength development at low temperature, high set cement compressive strength at high temperature of 600 DEG C, and stable long-term high-temperature compressive strength development, and meets the field application requirements of heavy oil fireflooding thermal production wells and coal gasification operation wells.
本发明提供了一种超高温固井用高强硅酸盐水泥浆及其制备方法与应用。以重量份计，该水泥浆的成分组成包括：100份硅酸盐水泥，4‑6份高温防裂材料，80‑105份高温增强材料，70‑78份水，0.5‑1.5份分散剂，1‑3份降失水剂，0.5‑2.5份缓凝剂，0.2‑0.5份消泡剂；其中，所述高温增强材料为酸洗石英砂、偏高岭土、硫酸铝的组合，或者，酸洗石英砂、偏高岭土、长石、硫酸钠的组合，或者，酸洗石英砂、偏高岭土、长石、亚硝酸钙的组合。该水泥浆具有沉降稳定性好，低温下强度发展快，600℃高温下水泥石抗压强度高，且长期高温抗压强度发展稳定的特点，满足稠油火驱热采井和煤气化作业井的现场应用要求。
High-strength silicate cement paste for ultrahigh-temperature well cementation as well as preparation method and application of high-strength silicate cement paste
一种超高温固井用高强硅酸盐水泥浆及其制备方法与应用
ZHANG HUA (Autor:in) / JIN JIANZHOU (Autor:in) / YU YONGJIN (Autor:in) / QU CONGFENG (Autor:in) / QI FENGZHONG (Autor:in) / XU MING (Autor:in) / LIU SHUOQIONG (Autor:in) / WANG ZHAOHUI (Autor:in) / GUO YUCHAO (Autor:in) / LIU JILIANG (Autor:in)
20.05.2022
Patent
Elektronische Ressource
Chinesisch
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