Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-density anti-channeling tough cement paste system for shale gas well cementation as well as preparation method and application of high-density anti-channeling tough cement paste system
The invention provides a high-density anti-channeling tough cement paste system for shale gas well cementation and a preparation method and application thereof, and belongs to the technical field of shale gas well cementation. Comprising G-grade cement, water, a composite weighting agent, a nano anti-channeling agent, a toughening agent, a fluid loss agent, a retarder, a dispersing agent and 0.5-1 part of a defoaming agent, and the nano anti-channeling agent is prepared by the following steps: ultrasonically mixing nano-grade aluminum oxide and a sodium carbonate solution. According to the invention, the addition of the nano anti-channeling agent not only has no negative influence on the construction performance of the cement paste, but also can promote the formation of the early strength of the cement, reduce the permeability of the set cement, make the structure of the set cement more uniform and compact, and effectively enhance the channeling resistance of the set cement; in addition, the composite weighting agent is adopted as the weighting agent, the elasticity modulus of set cement using the composite weighting agent is lower than that of set cement formed by a conventional weighting agent, and the impact strength and other mechanical properties are not greatly influenced.
本发明提供了一种页岩气固井用高密度防窜韧性水泥浆体系及其制备方法和应用，属于页岩气井固井技术领域。包括G级水泥、水、复合加重剂、纳米防窜剂、增韧剂、降失水剂、缓凝剂、分散剂和消泡剂0.5～1份，所述纳米防窜剂由包括以下步骤的方法制得：将纳米级氧化铝与碳酸钠溶液超声混合。本发明中，纳米防窜剂的加入不仅对水泥浆的施工性能无负面影响，且能够促进水泥早期强度的形成，降低水泥石渗透率，使水泥石的结构变的更加均匀密实，有效的增强水泥石的防窜性；此外，本申请中加重剂采用的一种复合加重剂，使用复合加重剂的水泥石的弹性模量比常规加重剂形成水泥石要低，对抗冲击强度等力学性能影响不大。
High-density anti-channeling tough cement paste system for shale gas well cementation as well as preparation method and application of high-density anti-channeling tough cement paste system
The invention provides a high-density anti-channeling tough cement paste system for shale gas well cementation and a preparation method and application thereof, and belongs to the technical field of shale gas well cementation. Comprising G-grade cement, water, a composite weighting agent, a nano anti-channeling agent, a toughening agent, a fluid loss agent, a retarder, a dispersing agent and 0.5-1 part of a defoaming agent, and the nano anti-channeling agent is prepared by the following steps: ultrasonically mixing nano-grade aluminum oxide and a sodium carbonate solution. According to the invention, the addition of the nano anti-channeling agent not only has no negative influence on the construction performance of the cement paste, but also can promote the formation of the early strength of the cement, reduce the permeability of the set cement, make the structure of the set cement more uniform and compact, and effectively enhance the channeling resistance of the set cement; in addition, the composite weighting agent is adopted as the weighting agent, the elasticity modulus of set cement using the composite weighting agent is lower than that of set cement formed by a conventional weighting agent, and the impact strength and other mechanical properties are not greatly influenced.
本发明提供了一种页岩气固井用高密度防窜韧性水泥浆体系及其制备方法和应用，属于页岩气井固井技术领域。包括G级水泥、水、复合加重剂、纳米防窜剂、增韧剂、降失水剂、缓凝剂、分散剂和消泡剂0.5～1份，所述纳米防窜剂由包括以下步骤的方法制得：将纳米级氧化铝与碳酸钠溶液超声混合。本发明中，纳米防窜剂的加入不仅对水泥浆的施工性能无负面影响，且能够促进水泥早期强度的形成，降低水泥石渗透率，使水泥石的结构变的更加均匀密实，有效的增强水泥石的防窜性；此外，本申请中加重剂采用的一种复合加重剂，使用复合加重剂的水泥石的弹性模量比常规加重剂形成水泥石要低，对抗冲击强度等力学性能影响不大。
High-density anti-channeling tough cement paste system for shale gas well cementation as well as preparation method and application of high-density anti-channeling tough cement paste system
一种页岩气固井用高密度防窜韧性水泥浆体系及其制备方法和应用
ZHU BAOZHONG (Autor:in) / XU MINGBIAO (Autor:in) / CHENG HONGPING (Autor:in) / HE MIAO (Autor:in) / ZHOU QING (Autor:in)
03.05.2022
Patent
Elektronische Ressource
Chinesisch
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