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A platform for research: civil engineering, architecture and urbanism
Self-degradation temporary plugging cement and preparation method thereof
The invention provides self-degradation temporary plugging cement suitable for a low-temperature high-temperature geothermal well and a preparation method thereof. The self-degradation temporary plugging cement comprises the following components: 6% of anhydrous Na2SiO3; 0.8% of carboxymethyl cellulose; 3% of NaHCO3, and the balance of the slag and the fly ash, wherein the percentages are all weight percentages. The self-degradation temporary plugging cement provided by the invention can be suitable for a temperature range of 150-180 DEG C, and is suitable for high-temperature geothermal resources with relatively low temperature. In addition, the self-degradation temporary plugging cement provided by the invention is cured at high temperatures of 150-180 DEG C, and after meeting water, thecement has reduced compressive strength, a loose structure and an obvious self-degradation effect.
本发明提供了一种适用于较低温度的高温地热井的自降解暂堵水泥及其制备方法。自降解暂堵水泥包括：6％的无水Na2SiO3；0.8％的羧甲基纤维素；3％的NaHCO3，其余为矿渣和粉煤灰，以上百分比均为重量百分比。本发明提供了能够在150℃‑180℃的温度范围内适用的自降解暂堵水泥，适用于较低温度的高温地热资源。此外，本发明提供的自降解暂堵水泥在150℃和180℃高温养护并且遇水后水泥抗压强度降低，结构疏松，自降解效果明显。
Self-degradation temporary plugging cement and preparation method thereof
The invention provides self-degradation temporary plugging cement suitable for a low-temperature high-temperature geothermal well and a preparation method thereof. The self-degradation temporary plugging cement comprises the following components: 6% of anhydrous Na2SiO3; 0.8% of carboxymethyl cellulose; 3% of NaHCO3, and the balance of the slag and the fly ash, wherein the percentages are all weight percentages. The self-degradation temporary plugging cement provided by the invention can be suitable for a temperature range of 150-180 DEG C, and is suitable for high-temperature geothermal resources with relatively low temperature. In addition, the self-degradation temporary plugging cement provided by the invention is cured at high temperatures of 150-180 DEG C, and after meeting water, thecement has reduced compressive strength, a loose structure and an obvious self-degradation effect.
本发明提供了一种适用于较低温度的高温地热井的自降解暂堵水泥及其制备方法。自降解暂堵水泥包括：6％的无水Na2SiO3；0.8％的羧甲基纤维素；3％的NaHCO3，其余为矿渣和粉煤灰，以上百分比均为重量百分比。本发明提供了能够在150℃‑180℃的温度范围内适用的自降解暂堵水泥，适用于较低温度的高温地热资源。此外，本发明提供的自降解暂堵水泥在150℃和180℃高温养护并且遇水后水泥抗压强度降低，结构疏松，自降解效果明显。
Self-degradation temporary plugging cement and preparation method thereof
自降解暂堵水泥及其制备方法
LIU KANG (author) / ZHENG XIUHUA (author) / MALIMENGLU (author) / TAN HUIJING (author)
2021-01-22
Patent
Electronic Resource
Chinese
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