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空气钻井中钻具腐蚀因素的灰关联分析

断块油气田

2004年 11卷第01期

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Title

Grey Association Analysis of Drilling Tools Corrosion Factors in Air Drilling

作者

万里平；孟英峰；梁发书；梁　红

Authors

Wan Liping, Meng Yingfeng, Liang Fashu,et al.

单位

西南石油学院

摘要

伊朗TBK气田钻具腐蚀严重,钻杆更换频繁,直接影响中方钻井施工的进度和经济效益。为了弄清影响钻具腐蚀的原因,在对TBK14 井地层水质分析的基础上,应用灰色理论中的灰关联分析方法对影响钻具腐蚀的多个因素进行了探讨。分析计算结果与现场实际情况相吻合。结果表明,造成钻具腐蚀的主要原因是高温条件下酸性地层盐水的电化学腐蚀;高压空气中溶解氧对钻具的氧化腐蚀;地层砂子磨损钻具使氧化膜脱落造成的磨蚀。为了保护钻具,决定配制高pH 值且添加了缓蚀剂的稳定泡沫液进行空气泡沫钻井。实践证明此法有效地抑制了钻具的腐蚀,提高了经济效益。

Abstract

Chinese side drilling executive progress and economic

benefits are effected ,due to drilling tools severe corrosion and

drilling pipe frequent replace in TBK gas - field of Iran. In

order to ascertain impacting drilling tools corrosive cause ,

application grey association analysis method of grey theory

discusses each corrosive factor , based on formation water

quality analysis of TBK 14 well. Analytical calculation

outcome dovetails field practical situation. The results show

that the main corrosive factors are acid formation briny

electro - chemical corrosion in high temperatrue ; oxidation

corrosion of dissolved oxygen in high pressure air ; oxidize

membrane shed creating wear , for strata sand abrading

drilling tools. In defence of drilling tools ,formulating high pH

value and adding corrosion inhibitor stable foam proceeds air

foam drilling. Practice indicates that this method effectively

restrains drilling tools corrosion and improves economic

benefits.

关键词：

钻具; 空气钻井; 腐蚀; 磨蚀; 灰关联分析;

Keywords:

Drilling tools ,Air drilling ,Corrosion ,Wear ,Grey association analysis.

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基金项目

DOI