防水冲稀堵漏预处理剂HSN的研制及应用  

Research on Preprocessing LCM HSN Used in Water Dilution Prevention

作　　者：赵素丽[1] 刘金华[1] 

机构地区：[1]中国石化石油工程技术研究院钻井液所

出　　处：《钻井液与完井液》2011年第6期8-10,91,共3页Drilling Fluid & Completion Fluid

基　　金：国家863项目"超深井钻井技术研究"(2006AA06A109)之专题四"超深井复杂地层井筒稳定性控制技术研究"(2006AA06A109-4)

摘　　要：针对含水漏失层的堵漏难题,研发了防水冲稀堵漏预处理剂HSN。HSN具有pH值降低时及与钙、镁离子作用时黏度变大的独特性质。HSN在与地层水接触后,与地层水中的钙、镁离子可发生迅速反应,使溶液黏度迅速变大,并且生成具有一定弹性的不均匀网状结构,从而使堵漏材料有效滞留。煤层气井韩5-094井在井深605 m处发生失返性漏失,堵漏9次未成功,分析认为是由含水裂缝引起的,因此采用HSN溶液并配合堵漏浆堵漏,结果使用很少堵漏材料即成功封堵。A preprocessing LCM HSN is developed that prevents water dilution based on problems of lost circulation in water-bearing formation.HSN has special performances that viscosity is increased when decreasing pH value or reacting with calcium and magnesium ions,which forms an elastic non-uniform net structure to keep more LCM retaining in wellbore.The application in well Han5-094 shows that the total mud loss is controlled by using this technology with few LCM.

关 键 词：含水地层 漏失 堵漏剂 防水冲稀 化学触变 堵漏材料滞留 

分 类 号：TE282[石油与天然气工程—油气井工程]