Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-temperature-resistant cement and cement paste system for well cementation and preparation method thereof
The invention provides high-temperature-resistant cement for well cementation, a cement paste system and a preparation method of the high-temperature-resistant cement. The high-temperature-resistant cement for well cementation comprises the following components in parts by weight: 40-55 parts of G-grade oil well cement, 40-55 parts of low-calcium portland cement, 1-5 parts of gypsum, 1-10 parts of sulphoaluminate cement and 1-10 parts of a composite admixture. The high-temperature-resistant cement slurry system for well cementation comprises the following components in parts by weight: 100 parts of high-temperature-resistant cement for well cementation, 0-70 parts of quartz sand, 1-6 parts of a suspension stabilizer, 2-9 parts of a fluid loss agent, 0.5-1.5 parts of a dispersing agent, 1-9 parts of a retarder, 0.1-0.5 part of a defoaming agent and 40-100 parts of water. The applicable temperature range of the cement and cement paste system is 150-240 DEG C, the compressive strength of set cement cured for 28 days is larger than 40 MPa, the compressive strength of the set cement does not decline, and the well cementation sealing effect of high-temperature and ultra-high-temperature deep wells and ultra-deep wells is guaranteed.
本发明提供了一种固井用耐高温水泥和水泥浆体系及其制备方法。该固井用耐高温水泥包括以下重量份的组分：G级油井水泥40～55份、低钙硅酸盐水泥40～55份、石膏1～5份、硫铝酸盐水泥1～10份、复合掺和料1～10份。本发明的固井用耐高温水泥浆体系包括以下重量份的组分：固井用耐高温水泥100份、石英砂0～70份、悬浮稳定剂1～6份、降失水剂2～9份、分散剂0.5～1.5份、缓凝剂1～9份、消泡剂0.1～0.5份和水40～100份。本发明的水泥及水泥浆体系的适用温度范围为150℃～240℃，养护28天的水泥石抗压强度大于40MPa，且其抗压强度无衰退，保障了高温、超高温深井、超深井的固井密封效果。
High-temperature-resistant cement and cement paste system for well cementation and preparation method thereof
The invention provides high-temperature-resistant cement for well cementation, a cement paste system and a preparation method of the high-temperature-resistant cement. The high-temperature-resistant cement for well cementation comprises the following components in parts by weight: 40-55 parts of G-grade oil well cement, 40-55 parts of low-calcium portland cement, 1-5 parts of gypsum, 1-10 parts of sulphoaluminate cement and 1-10 parts of a composite admixture. The high-temperature-resistant cement slurry system for well cementation comprises the following components in parts by weight: 100 parts of high-temperature-resistant cement for well cementation, 0-70 parts of quartz sand, 1-6 parts of a suspension stabilizer, 2-9 parts of a fluid loss agent, 0.5-1.5 parts of a dispersing agent, 1-9 parts of a retarder, 0.1-0.5 part of a defoaming agent and 40-100 parts of water. The applicable temperature range of the cement and cement paste system is 150-240 DEG C, the compressive strength of set cement cured for 28 days is larger than 40 MPa, the compressive strength of the set cement does not decline, and the well cementation sealing effect of high-temperature and ultra-high-temperature deep wells and ultra-deep wells is guaranteed.
本发明提供了一种固井用耐高温水泥和水泥浆体系及其制备方法。该固井用耐高温水泥包括以下重量份的组分：G级油井水泥40～55份、低钙硅酸盐水泥40～55份、石膏1～5份、硫铝酸盐水泥1～10份、复合掺和料1～10份。本发明的固井用耐高温水泥浆体系包括以下重量份的组分：固井用耐高温水泥100份、石英砂0～70份、悬浮稳定剂1～6份、降失水剂2～9份、分散剂0.5～1.5份、缓凝剂1～9份、消泡剂0.1～0.5份和水40～100份。本发明的水泥及水泥浆体系的适用温度范围为150℃～240℃，养护28天的水泥石抗压强度大于40MPa，且其抗压强度无衰退，保障了高温、超高温深井、超深井的固井密封效果。
High-temperature-resistant cement and cement paste system for well cementation and preparation method thereof
一种固井用耐高温水泥和水泥浆体系及其制备方法
ZHANG JIAYING (Autor:in) / ZHANG HUA (Autor:in) / YU YONGJIN (Autor:in) / QU CONGFENG (Autor:in) / WANG YAO (Autor:in) / JIN JIANZHOU (Autor:in) / ZHANG CHI (Autor:in) / LIU HUITING (Autor:in) / QI FENGZHONG (Autor:in) / ZHANG XIAOBING (Autor:in)
17.12.2024
Patent
Elektronische Ressource
Chinesisch
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