Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-temperature-resistant toughened gas channeling-preventing well cementing cement paste and preparation method thereof
The invention relates to the technical field of oil drilling and cementing cement paste, in particular to high-temperature-resistant, toughened and gas channeling-preventing well cementing cement paste and a preparation method thereof. The high-temperature-resistant, toughened and gas channeling-preventing well cementing cement paste comprises the following raw materials: oil well cement, a fluidloss agent, a high-temperature-resistant retarder, a toughening and channeling-preventing agent, a dispersing agent, 140-mesh quartz sand, 500-mesh quartz sand, an expanding agent, a paste stabilizerand water. Quartz sand with different particle sizes is added into cement paste according to a certain proportion based on the particle grading principle, other additives are added to adjust the performance of the cement paste, and the high-temperature-resistant, toughened and gas channeling-preventing well cementing cement paste is obtained. According to the invention, the formula is simple, thefield preparation operation is simple, and the product has good physical properties, good slurry stability and rheological property under a high temperature condition, and small water loss; the set cement formed after hydration has the advantages of being high in toughness, small in elasticity modulus, high in applicability, controllable in thickening time, low in cost and slow in set cement high-temperature strength decline, and the long-term integrity of the oil and gas well cement sheath can be guaranteed.
本发明涉及石油钻井固井水泥浆技术领域，是一种抗高温、增韧、防气窜固井水泥浆及其制备方法，前者原料包括油井水泥、降失水剂、抗高温缓凝剂、增韧防窜剂、分散剂、140目石英砂、500目石英砂、膨胀剂、浆体稳定剂和水，按照颗粒级配原理在水泥浆中按照一定比例加入不同粒径的石英砂，加入其它外加剂调整水泥浆性能，得到抗高温、增韧、防气窜固井水泥浆。本发明配方简单，现场制备操作简单，产品具有良好的物理性能，在高温条件下浆体稳定性、流变性好，失水小；水化后形成的水泥石具有韧性强、弹性模量小的特性，且适用性强、稠化时间可控、成本低、水泥石高温强度衰退慢的特性，可以保证油气井水泥环的长期完整性。
High-temperature-resistant toughened gas channeling-preventing well cementing cement paste and preparation method thereof
The invention relates to the technical field of oil drilling and cementing cement paste, in particular to high-temperature-resistant, toughened and gas channeling-preventing well cementing cement paste and a preparation method thereof. The high-temperature-resistant, toughened and gas channeling-preventing well cementing cement paste comprises the following raw materials: oil well cement, a fluidloss agent, a high-temperature-resistant retarder, a toughening and channeling-preventing agent, a dispersing agent, 140-mesh quartz sand, 500-mesh quartz sand, an expanding agent, a paste stabilizerand water. Quartz sand with different particle sizes is added into cement paste according to a certain proportion based on the particle grading principle, other additives are added to adjust the performance of the cement paste, and the high-temperature-resistant, toughened and gas channeling-preventing well cementing cement paste is obtained. According to the invention, the formula is simple, thefield preparation operation is simple, and the product has good physical properties, good slurry stability and rheological property under a high temperature condition, and small water loss; the set cement formed after hydration has the advantages of being high in toughness, small in elasticity modulus, high in applicability, controllable in thickening time, low in cost and slow in set cement high-temperature strength decline, and the long-term integrity of the oil and gas well cement sheath can be guaranteed.
本发明涉及石油钻井固井水泥浆技术领域，是一种抗高温、增韧、防气窜固井水泥浆及其制备方法，前者原料包括油井水泥、降失水剂、抗高温缓凝剂、增韧防窜剂、分散剂、140目石英砂、500目石英砂、膨胀剂、浆体稳定剂和水，按照颗粒级配原理在水泥浆中按照一定比例加入不同粒径的石英砂，加入其它外加剂调整水泥浆性能，得到抗高温、增韧、防气窜固井水泥浆。本发明配方简单，现场制备操作简单，产品具有良好的物理性能，在高温条件下浆体稳定性、流变性好，失水小；水化后形成的水泥石具有韧性强、弹性模量小的特性，且适用性强、稠化时间可控、成本低、水泥石高温强度衰退慢的特性，可以保证油气井水泥环的长期完整性。
High-temperature-resistant toughened gas channeling-preventing well cementing cement paste and preparation method thereof
抗高温、增韧、防气窜固井水泥浆及其制备方法
CHEN JIE (Autor:in) / SONG ZHAOHUI (Autor:in) / KE XUE (Autor:in) / WANG JUN (Autor:in) / DAI HONG (Autor:in) / QIN XI (Autor:in) / TANG YUKE (Autor:in) / WANG YONG (Autor:in) / WANG XUECHENG (Autor:in) / XIE DONG (Autor:in)
26.02.2021
Patent
Elektronische Ressource
Chinesisch
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