摘要
裂缝性恶性漏失层漏失通道尺寸大,桥接堵漏及水泥和凝胶等堵漏成功率低。通过分析常用堵漏方法存在的不足,提出了新型固结堵漏浆的开发思路,确定了堵漏浆组分,通过室内实验,得出了各组分的合理加量,形成了新型固结堵漏浆。新型固结堵漏浆具有较好的流动性,便于泵送;具有较好的剪切稀释性,便于在漏失通道内滞留。新型固结堵漏浆形成的固化物抗压强度随温度升高呈增加趋势,在95℃下强度可达到18.9 MPa;具有微膨胀特点,有利于形成致密封堵层;韧性好,不易产生掉块造成卡钻等井下复杂问题,利于施工安全。新型固结堵漏浆对较大的裂缝性漏失层具有较好的封堵效果,能够满足压差较大的漏失层的封堵要求。
For the fractured leak with large leakage paths,the success rates of plugging by using the normal bridge loss circulation materials,cements and gels are relatively low. By analyzing the disadvantages of the common plugging methods,a novel consolidation plugging slurry is developed. The components of the slurry are optimized and confirmed according to the experiments. The resultant slurry has good flowability for easily pumping and a distinct shear thinning behavior in favor of staying in leakage paths. The compressive strength of the slurry through consolidation is increased with the increase of temperature and can reach 18. 9 MPa under 95℃. A slightly swelling characteristic of the consolidated slurry is displayed,which is helpful to form compact plugged zones. The consolidated slurry is very tough and hardly collapses,suggesting the safe operation. The novel consolidation plugging slurry exhibits a good plugging performance for fractured leak formations and can meet the needs of plugging leak formations with large differential pressure.
出处
《现代化工》
CAS
CSCD
北大核心
2016年第6期96-99,共4页
Modern Chemical Industry
关键词
裂缝
固结堵漏浆
强度
膨胀
韧性
fracture
consolidation and plugging slurry
strength
swell
tough
