吉林油田套管损坏因素分析及预防对策

Analysis on Casing Failure Factors in Jilin Oilfield and Prevention Countermeasures

随着吉林油田勘探开发的不断深入,开采年限的不断增长,部分地区由于长期注水开发,加之频繁的措施作业及井身结构、完井固井质量、套管材质及腐蚀等诸多因素的影响,油水井套管损坏情况十分严重,严重影响了油田注采结构调整和注水开发效果。通过油田的开发历程可以看出,随着油田注水压力、地层压力的提高,套管损坏井越来越多。因此从油田套管损坏的分布、时间、井型、形态及层位等特征方面进行了统计分析,提出油田套管损坏发生的规律及特点,据此分析了低渗透注水开发油田套管损坏的主要影响因素和作用机理。在此基础上,通过对油田现场实际调查研究提出了预防套管损坏的综合配套技术措施,可为油田有效解决套管损坏问题提供参考。

With unceasingly deepening of Jilin oil field exploration and development and growth of production time,oil well casings in some areas are seriously damaged due to the effects of such factors as long-term water injection development,well bore structure change,poor well completion and well cementation quality,poor casing material quality,corrosion,etc.,which has seriously affected the effects of oil field injection and production structure adjustment and water injection development.It can be found through oil field development process that oil well casings are more and more seriously damaged as oil field water injection pressure and stratum pressure are increased.Therefore,carried out is a statistical analysis on such characteristics as distribution,time,type,shape and position of oil field casing failures,put forward are the rules and characteristic of the failures and analyzed are their main effect factors and function mechanism.Proposed are comprehensive supporting technical measures for preventing the failures according to these oil field investigation results,which has important reference value for effective solution of the oil field casing failures.