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油井水泥与钢管胶结界面处微观结构研究(I)
石油钻采工艺
2002年 24卷 第4期
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Title
STUDY ON THE MICROSTRUCTURE AT THE CEMENTATION INTERFACE BETWEEN OIL WELL CEMENT AND CASING
作者
杨振杰
李美格
郭建华
罗平亚
阎培渝
秦坚
单位
中原油田公司, 河南濮阳 457000
西南石油学院, 四川南充 637001
清华大学, 北京 100084
摘要
阐述了微观结构研究的意义,研究了静态养护条件下油井水泥与钢管胶结界面处的微观结构,结果表明油井水泥与钢管胶结界面处存在大量易冲蚀的Ca(OH)2晶体和高碱性的C-S-H凝胶,是一个结构较疏松、薄弱的过渡带,不可避免地降低了固井水泥环的抗窜能力。
Abstract
The significance and necessity of study on microstructure are described, and the microstructure at cementation interface between cement and casing is investigated in the condition of static aging. It shows that there are large amounts of Ca(OH)2 crystals that may be easily washed out, and C-S-H gel of high alkalinity at the interface, and it is a loose structured weak transition area, thus the channeling resistance of cement sheath is inevitably lowed down.
关键词：
胶结界面;
微观结构;
界面胶结强度;
油井水泥;
固井质量;
Keywords:
cementation interface;
microstructure;
interface cementation strength;
cementing quality;
DOI
10.3969/j.issn.1000-7393.2002.04.002
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