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A platform for research: civil engineering, architecture and urbanism
Low-friction elastic-tough well cementation cement slurry for well with fixed casing in casing
The invention relates to the technical field of shale gas development, in particular to low-friction elastic-tough well cementation cement paste for a casing-in-casing well, which can solve the problem that the cement paste is easy to leak in the well cementation construction process of the casing-in-casing well, and comprises the following components in parts by weight: 100 parts of oil well G-grade cement, 30-90 parts of superfine slag, 30-90 parts of superfine fly ash, 0.4-4 parts of a suspending agent and 1-5 parts of a fluid loss agent. 7-20 parts of an elastic and tough agent, 1-4 parts of an expanding agent, 1-4 parts of a defoaming agent and 100-200 parts of water. The cement paste has excellent comprehensive performance such as low friction resistance, low elastic modulus, good sedimentation stability, low water loss and stable thickening curve, can be well suitable for operation construction of a casing-in-casing well, ensures construction safety and prevents cement sheath stress failure in the fracturing process.
本发明涉及页岩气开发技术领域，具体涉及一种套中固套井用低摩阻弹韧性固井水泥浆，可解决套中固套井固井施工过程中水泥浆易漏失的问题，各组分及重量比如下：油井G级水泥100份，超细矿渣30～90份，超细粉煤灰30～90份，悬浮剂0.4～4份，降失水剂1～5份，弹韧性剂7～20份，膨胀剂1～4份，消泡剂1～4份，水100～200份。本发明的水泥浆具有低摩阻、低弹性模量、沉降稳定性好、失水量低、稠化曲线稳定等优良的综合性能，可较好的适用于套中固套井的作业施工，保证施工安全和防止压裂过程中水泥环应力失效。
Low-friction elastic-tough well cementation cement slurry for well with fixed casing in casing
The invention relates to the technical field of shale gas development, in particular to low-friction elastic-tough well cementation cement paste for a casing-in-casing well, which can solve the problem that the cement paste is easy to leak in the well cementation construction process of the casing-in-casing well, and comprises the following components in parts by weight: 100 parts of oil well G-grade cement, 30-90 parts of superfine slag, 30-90 parts of superfine fly ash, 0.4-4 parts of a suspending agent and 1-5 parts of a fluid loss agent. 7-20 parts of an elastic and tough agent, 1-4 parts of an expanding agent, 1-4 parts of a defoaming agent and 100-200 parts of water. The cement paste has excellent comprehensive performance such as low friction resistance, low elastic modulus, good sedimentation stability, low water loss and stable thickening curve, can be well suitable for operation construction of a casing-in-casing well, ensures construction safety and prevents cement sheath stress failure in the fracturing process.
本发明涉及页岩气开发技术领域，具体涉及一种套中固套井用低摩阻弹韧性固井水泥浆，可解决套中固套井固井施工过程中水泥浆易漏失的问题，各组分及重量比如下：油井G级水泥100份，超细矿渣30～90份，超细粉煤灰30～90份，悬浮剂0.4～4份，降失水剂1～5份，弹韧性剂7～20份，膨胀剂1～4份，消泡剂1～4份，水100～200份。本发明的水泥浆具有低摩阻、低弹性模量、沉降稳定性好、失水量低、稠化曲线稳定等优良的综合性能，可较好的适用于套中固套井的作业施工，保证施工安全和防止压裂过程中水泥环应力失效。
Low-friction elastic-tough well cementation cement slurry for well with fixed casing in casing
一种套中固套井用低摩阻弹韧性固井水泥浆
YUAN FAYONG (author) / DOU RUIJIE (author) / SU HAO (author) / GUO SHENGLAI (author) / ZHANG CHI (author)
2022-04-05
Patent
Electronic Resource
Chinese
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