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粉煤灰降失水水泥浆在天然气井固井中的研究与应用

Zhan-xian CHANG,Zhou-sheng WEI,Peng-ju XING,Bing ZHOU,Wen-ge FENG,Zuo-ying YANG

Drilling Fluid and Completion Fluid（2006）

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Abstract
长庆天然气田属于低压、低渗透气田,存在承压能力较低的地层,固井设计要求全井段封固,并且采用双级双凝施工工艺.但由于用于低密度水泥浆中的漂珠生产量降低,价格上升,研究应用替代产品是固井技术发展的方向.在一级领浆中研究应用了粉煤灰水泥浆体系,其性能和固井质量可完全满足固井要求.粉煤灰水泥浆体系价格低和固井质量优良,使其成为漂珠水泥浆体系的替代配方.
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Key words
Fly ash,Gas well cementing,Losses control cement slurry,Low density cement slurry
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