胜科1井钻具腐蚀防护技术研究与应用  

Drilling Tools Anti-corrosion Technology for Well Shengke-1.

作　　者：经淑惠[1,2] 

机构地区：[1]胜利石油管理局钻井工艺研究院 [2]中国石油大学(华东)石油工程学院

出　　处：《钻井液与完井液》2009年第2期78-81,共4页Drilling Fluid & Completion Fluid

基　　金：863计划项目"超深井钻井技术研究(2006AA06A19-5)"资助

摘　　要：针对胜科1井三开钻遇的多套盐膏层、盐岩层、软泥岩与膏泥岩互层,以盐水对钻具钢材的腐蚀规律研究为基础,探讨了钻具腐蚀的影响因素,在优选出的钻井液配方基础上进行了不同缓蚀剂的配伍性试验,采用欠饱和复合盐水防腐钻井液,在Cl-含量大于16×104mg/L,温度达到140℃情况下,有效地解决了钻具防腐问题。现场应用表明,欠饱和复合盐水防腐钻井液不仅流变性能满足了钻井需要,而且对钻具腐蚀小,平均腐蚀速率均小于0.05 mm/a。Severe drilling tools corrosion was experienced in the third interval of well Shengke-1 penetrated multiple salt and gypsum zones. An under-saturated salt drilling fluid was designed based on the laboratory studies on the corrosion behavior of salt water to steel. The corrosion of the under-saturated salt drilling fluid was greatly reduced because of its corrosion inhibition performance. Drilling tools corrosion was mitigated at chloride concentration greater than 16×104 mg/L and temperatures 140 ℃. The average rate of corrosion in field use was less than 0.05 mm/a.

关 键 词：钻具腐蚀 腐蚀速率 缓蚀剂 钻具防腐 

分 类 号：TE892[石油与天然气工程—油气储运工程]