酸性气田钻具失效研究

RESEARCH ON THE DRILL TOOL FAILURE IN ACID GAS FIELD

近年来,在酸性气田勘探开发中的钻具失效事故时有发生,严重影响了钻井安全。为了分析酸性气田钻具失效的原因,结合具体钻具失效案例,对钻具在氧气、二氧化碳和硫化氢3种不同的酸性腐蚀环境下的失效进行了分析,得到了氧腐蚀、二氧化碳腐蚀和硫化氢应力腐蚀环境下的钻具失效特点和失效形式,并提出了预防钻具腐蚀失效的措施和方法,对指导酸性气田钻具失效原因分析,预防和减少钻具失效事故提供了技术支持。

In recent years,drilling tool failure accidents have occurred occasionally in acid gas field exploration and development,which hindered the safety of drilling. The failure mechanism analysis of drill tool on the variety of corrosive environment in the acid gas field,such as oxygen corrosion,carbon dioxide corrosion,hydrogen sulfide stress corrosion,was made. Through specific case of drill tools failure in the acid gas field,the failure characteristics and failure modes in oxygen,carbon dioxide and hydrogen sulfide corrosive environment were analyzed,and the measures and methods of prevention drill tool corrosion failure were proposed,which have important guidance for prevention and decrease drilling tool failure accidents in the acid gas field development.