油井净水泥浆及水泥石优化措施研究-断块油气田.PDF

断 块 油 气 田 15 卷 2 期 FAULT-BLOCK OIL GAS FIELD 2008 年3 月 文章编号 1005-8907 渊2008 冤02- 10 1-03 油井净水泥浆及水泥石优化措施研究 邬 钢 渊华北分公司工程监督中心 河南 郑州 450006冤 摘 要 油井水泥是以水硬性硅酸钙为主要成分的胶凝材料袁其水化特性尧使用环境和施工工艺决定了净水泥浆具 有高失水尧高密度和水泥浆凝固后水泥石的体积收缩尧高脆性等缺陷袁无法满足复杂井的固井要求遥 通过分析净水泥浆尧水 泥石缺陷给固井施工和储层带来的损害袁提出了解决问题的 内常用的外加剂及其作用机理和水泥浆体系袁对不同的井内 条件下选择合适的水泥浆体系和外加剂具有借鉴和指导意义遥 关键词 净水泥浆 水泥石 缺陷 外加剂 作用机理 + 中图分类号 TE256 . 1 文献标识码 A Study on optimazing measure of neat cement slurry and cement paste for oil well Wu Gang (Supervising Center of Huabei Company, SINOPEC Zhengzhou 450006, China). Oil well cement is a kind of binding material mainly made from calcium carbonate which is hydraulic binding material. Its inherent hydration characteristics application environment and cementing techniques determine on the neat cement slurry 爷s defects as higher water 蛳loss higher density higher volume shrinkage and higher brittleness of cement paste after concretion of cement. Hence, the inherent defects of neat cement slurry and cement paste can 爷t meet the requirements of cementing. This paper gives the additives commonly used at home to overcome defects of neat cement slurry and cement paste and its function mechanism. It also gives a kind of slurry system through analyzing damage of performance index of neat cement slurry and cement paste 爷s defects for cementing and formation. What we have done can be very useful for selecting proper cement system and additives under different borehole condition. Key words: neat cement slurry cement paste defects additive function mechanism. 1 固有缺陷 泵送条件