堵漏低密度水泥浆室内研究与评价  

Indoor Research and Evaluation of Low-density Cement Slurry for Leak Sealing

作　　者：许前富[1] 马春旭[1] 孙超[1] 马云朋 马小康[1] XU Qianfu;MA Chunxu;SUN Chao;MA Yunpeng;MA Xiaokang(China Oilfield Services Ltd.,Hebei Langfang 065201,China)

机构地区：[1]中海油田服务股份有限公司,河北廊坊065201

出　　处：《广州化工》2025年第6期73-75,129,共4页GuangZhou Chemical Industry

摘　　要：堵漏低密度水泥浆是解决固井漏失的一种有效手段。通过对空心微珠在高压下破碎情况的分析,进行了微珠筛选,可以满足大多数固井井况的水泥浆密度变化≤0.03 g/cm^(3);另外增强剂C-SE4可以有效提升低密度水泥石强度;纤维堵漏材料、颗粒堵漏都具有良好的应用性能,同时通过复配必要的固井外加剂,构建了1.3~1.5 g/cm^(3)堵漏低密度水泥浆体系,可以根据现场需求调节水泥浆密度,且纤维堵漏材料和颗粒堵漏材料搭配使用,可封堵裂缝宽度最大可达1 mm,最高承压5 MPa,堵漏效果显著提高。Leak sealing low-density cement slurry is an effective means to solve cementing leakage.By analyzing the fragmentation of hollow micro-sphere under high pressure,micro-sphere screening was conducted,which can meet the requirement of cement slurry density variation≤0.03 g/cm^(3)for most cementing well conditions.In addition,the reinforcing agent C-SE4 can effectively enhance the strength of low-density cement paste.Fiber plugging materials and particle plugging materials had good application performance.At the same time,by compounding necessary cementing additives,a low-density cement slurry system with a density of 1.3~1.5 g/cm^(3)for plugging was constructed.The density of the cement slurry can be adjusted according to on-site needs.The combination of fiber plugging materials and particle plugging materials can block cracks with a maximum width of 1 mm and a maximum pressure of 5 MPa,significantly improving the plugging effect.

关 键 词：低密度水泥浆 堵漏材料 空心微珠 增强剂 

分 类 号：TE256[石油与天然气工程—油气井工程]