摘要
固井水窜问题是各油田普遍存在的技术难题,目前缺乏有效的解决办法。针对以上问题,从水泥浆体系出发,首先进行了防水窜材料的结构设计,然后根据结构设计,筛选出相应的防水窜原材料,并通过对其合理的复配研究,制备出了一种新型固井用防水窜材料。实验根据固井不同阶段的水窜机理,采用相应的方式对该材料的防水窜效果进行了评价,结果显示开发的防水窜材料可增加水泥浆内部结构,缩短静胶凝过渡时间,避免水泥石收缩,从而避免水泥浆在不同阶段发生水窜。另外,综合评价结果表明,新型固井防水窜材料可缩短稠化时间、增加水泥石强度,改善水泥浆稳定性,且对水泥浆稠化、流变、失水等性能无不良影响,综合性能良好。
Water channeling in well cementing has been a difficult technical problem remained unsolved in petroleum industry till now.In a study on anti-water channeling cement slurry,structural design of anti-water channeling additives were done,and based on the design,several anti-water channeling raw materials were selected and mixed in a certain ratio to form a new compounded anti-water channeling additive.According to the water-channeling mechanisms in different stages of well cementing,the effect of the anti-water channeling additive was evaluated with different evaluation methods.The evaluation results showed that the anti-water channeling additive developed is able to strengthen the interior structure of cement slurry,shorten the transit time of static gel,avoid contracting of set cement,thereby avoiding water-channeling of cement slurry at different cementing stages.The evaluation also demonstrated that the new anti-water channeling additive is able to shorten thickening time of cement slurry,increase compressive strength of set cement,and improve the stability of cement slurry;it has no bad effect on the thickening time,rheology and filter loss of cement slurry,exhibiting good overall properties.
作者
卢海川
赵岳
宋伟宾
高继超
胡中华
霍明江
LU Haichuan;ZHAO Yue;SONG Weibin;GAO Jichao;HU Zhonghua;HUO Mingjiang(Boxing Division of CNPC Offshore Engineering Company Limited, Tianjin 300451;Qinghai Drilling Division of CNPC Xibu Drilling Engineering Company Limited, Haixi, Qinghai 816400)
出处
《钻井液与完井液》
CAS
北大核心
2017年第4期75-79,84,共6页
Drilling Fluid & Completion Fluid
关键词
固井
水窜
水泥浆
防水窜材料
防水窜评价
综合性能
Well cementing
Water channeling
Cement slurry
Anti-water channeling material
Evaluation of anti-water channeling performance
Overall properties
