套管损害的原因及防治

通过对河南油田套管损坏的油水井资料进行搜集、整理、分析,从地质因素、高压注水、井下作业、完井质量及生产管理等方面,对套管损坏原因及变化规律进行了深入的研究和探讨,结合生产实际状况,提出了延长套管寿命,防止套管损坏的措施意见,从修井难易程度、工艺技术、产量及注水量高低等诸多因素,综合经济效益评价,提出了套管损坏井大修的原则。为今后如何进一步保护好套管,节省大修费用,降低成本,提高经济效益等方面提出了建议。

Cause of Casing Damage and Its Preventive Measures

Based on the data from casing damage of Oil wells and water wells, the authors analyse the cause of casing damage in aspects of geological factors, completion quality, high pressure water ingection, downhole operation and production management, and provide the maesures to extend casing life and avoid casing damage combining with the production. Considering the factors of difficulty of workover, pressure and technology, the authors also have evaluated the economic efficiency and give the operating guidelines for workover in the casing damage wells. Additionally, have put forward the suggestions in protecting casing, saving workover fee, reducing costs and increasing economic benefits.