油井水泥专用丁苯胶乳的实验评价  

Laboratory Evaluation on Styrene Butadiene Latex Specialized for Oil Well Cement

作　　者：肖明明 郭锦棠[1] 靳建洲 于永金 樊金杰 

机构地区：[1]天津大学化工学院,天津300072 [2]中国石油集团钻井工程技术研究院,北京100089

出　　处：《化学工业与工程》2017年第6期18-23,共6页Chemical Industry and Engineering

基　　金：国家科技重大专项(2011ZX05021-004);天津市自然科学基金项目(15JCYBJC21100)

摘　　要：针对传统丁苯胶乳在油井水泥浆中适用性能差的问题,采用种子乳液聚合方法合成了一种油井水泥专用丁苯胶乳,并对其进行了微观结构和应用性能评价。该丁苯胶乳物理性能、红外及热失重分析结果表明:该丁苯胶乳乳液稳定性好,高温下分子结构稳定。丁苯胶乳水泥浆的应用性能结果和微观结构分析表明:该丁苯胶乳水泥浆API失水可控制在50 m L内,耐盐性能好,可解决传统胶乳水泥浆稠化实验"鼓包"、"包心"等问题;加有该丁苯胶乳的水泥浆早期强度发展快,胶凝强度过渡时间短;丁苯胶乳能细化水泥浆的孔径结构,提高水泥浆的胶结强度和形变能力,并且其水泥石的柔韧性比原浆水泥石提高了30%;此外,能够满足深井、超深井和气井等复杂井的固井作业要求。With regard to poor applicability of traditional styrene-butadiene latex in oil well cement, styrene-butadiene latex specialized for oil well cement was developed by seeded emulsion polymerization, while its micro-structure and properties were evaluated. Physical properties with styrene-butadiene latex, IR and TG analysis show that：styrene-butadiene latex has good emulsion stability and stable molecular structure. The application performance and microstructure of slurries show that：API filtration of slurries with styrene-butadiene latex can be controlled under 50 mL. Slurries with styrene-butadiene latex has excellent salt-resistance and can also deal with the package of thickening curve in traditional styrene-butadiene latex; slurries mainly prepared by styrene-butadiene latex present rapid development of early strength, short transit time during thickening process. What is more, styrene-butadiene latex can refine the pore structure to improve the cementing strength of the cement slurry and the deformation ability, And the flexibility is relatively higher by 30% in comparison with ordinary oil well cement. It can satisfy cementing requirements in deep well, ultra-deep well and gas well.

关 键 词：油井水泥 丁苯胶乳 乳液稳定性 耐盐性 防气窜 柔韧性 

分 类 号：TE256.6[石油与天然气工程—油气井工程]