| 微细水泥／漂珠低密度水泥浆体系的研制 |
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| 引用本文： | 李勇,李小燕.微细水泥／漂珠低密度水泥浆体系的研制[J].精细石油化工进展,2008,9(8):13-15. |
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| 作者姓名： | 李勇 李小燕 |
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| 作者单位： | 1. 西南石油大学化学化工学院,成都,610500
2. 西华师范大学化学化工学院,南充,637002 |
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| 摘 要： | 利用颗粒级配和紧密堆积理论，制备了密度为1．20～1．30g/cm^3的微细水泥／漂珠低密度水泥浆体系。确定了其最佳配方：微细水泥与G级油井水泥质量比为1：1，微硅加量6．0％，降失水剂SZ1—2加量1．5％，早强剂CK21加量2．0％，分散剂SXY加量1．4％，漂珠加量30%-60％，空心玻璃珠加量10％～20％，水灰比0．58—0．62。在50℃下，考察了该低密度水泥浆的抗压强度、失水性、流变性等，结果表明，该体系具有早期强度高、稳定性好、稠化时间可调等优点，适用于低压易漏地层及超长封固段的固井施工。
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| 关 键 词： | 低密度水泥浆 微细水泥 漂珠 空心玻璃珠 固井 |
Preparation and Evaluation of Fine Cement/Floating Bead Low-density Cement Slurry System |
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| Li Yong,Li Xiaoyan.Preparation and Evaluation of Fine Cement/Floating Bead Low-density Cement Slurry System[J].Advances in Fine Petrochemicals,2008,9(8):13-15. |
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| Authors: | Li Yong Li Xiaoyan |
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| Affiliation: | Li Yong Li Xiaoyan( 1. Chemistry and Chemical Engineering Institute of Southwest Petroleum University, Chengdu 610500; 2. Chemistry and Chemical Engineering Institute of China West Normal University, Nanchong 637002 ) |
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| Abstract: | A kind of fine cement/floating bead low - density cement slurry with a density of 1.20 - 1.30 g/cm^3 was developed based on grain composition and close packing theory. Its optimal formula was as follows： the ratio of fine cement to G - grade well cement 1 ： 1 （ w/w）, micro silicon 6.0%, fluid loss additive SZ1 - 2 1.5% , early strength agent CK21 2.0%, dispersant SXY 1.4% , floating bead 30% - 60% , hollow glass bead 10% -20% , water/cement ratio 0.58 -0.62. The compression strength, fluid loss characteristic, and rheological characteristic of the prepared cement slurry system at 50℃ were evaluated. The system showed high early strength, good stability and adjustable thickening time and was suitable for cementing operation in low pressure leaking formations and ultra -long isolation sections. |
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| Keywords: | low -density cement slurry fine cement floating bead hollow glass bead cementing |
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