高含水后期套损井综合治理配套技术

大庆油田杏北开发区自1972年出现套损以来至2004年底已发现套损井2473口，套损形势十分严峻。套管损坏不仅造成油田的注采失衡，而且对套损井采取增产增注措施都会产生不同程度的限制，降低了套损井区剩余油的挖掘潜力。近几年通过不断加强套损井治理工作，套损井区的注采关系逐步得到改善。在套损井大修方面，研究应用了通径70mm以上套损井整形扩径技术，开展了段铣扩径技术和膨胀管加固技术攻关，不仅提高了套损井大修的修复率，而且提高了修井质量；在套损井利用方面，研究并应用了套损井分层注水工艺技术和细分堵水技术，开展了套损井分层压裂改造技术攻关．为通径100mm以上套损井细分注水、增产增注等措施提供了技术保证，充分发挥了套损井在油田高含水后期的生产潜力。

Matching technique of comprehensive harness of casing damage wells in later stage of high water cut

Since casing damage appeared in 1972 in Xingbei development area, there were altogether 2473 casing damaged wells by the end of 2004. Casing damage not only causes unbalanced injection-production relation but also limits stimulation measures for production increasing and injection increasing and decreases production potential of remaining oil in casing damage well fields. In recent years, casing damage well harness work improves injection-production relation in casing damage well fields. In respect of casing damage well workover, shaping hole enlargement technique for drift diameter more than 70mm, milled hole enlargement technique and bulged tube consolidating technique are studied and applied. These techniques not only increase repair rate of casing damage well workover but also improve workover quality. In respect of casing damage well utilizing, separated zone water injection technique and subdivided water shut-off technique of casing damage well are studied and applied. Separated zone fracturing technique reform is performed. These techniques provide technical support for subdivided water injection, oil production increasing and water injection increasing for casing damage wells with drift diameter more than 100mm.