海上油田同井注采技术开发与应用

针对海上油田开发生产中出现的油田注水水源不足,采油井多层系开发调整要求分层段、分阶段转注及采油井伴生气回注等技术问题,开发了同井采注工艺技术。将有水层注水井的水层打开提供水源,同时保持原注水井正常注水,与平行双管相比,单管大排量同井采水注水技术使同井采水量从800 m3/d提高到2 500 m3/d;对不同目标层位可分别进行采出或注入,即同井采油注气或同井采油注水,相当于把原来的1口井变成2口井使用,提高了单井利用率,实现了一定范围的井网优化。该技术在渤海湾SZ36-1J、Z9-3、LD10-1等油田成功应用8口井,已成为老油田稳产增产的重要技术手段,为新开发油田生产完井开辟了一个新的完井模式。

Development and Application of Single Well Integral Injection/Production Technique

The technique,referring to the challenges posed by the shortage of flooding sources,requirements of zonal recovery,converted injection and associated gas recycling for multiple-zone production,was successfully developed.Referring to the challenges posed by the shortage of flooding sources,requirements of zonal recovery,converted injection and associated gas recycling for multiple-zone production,the technique was successfully developed as well.To supply the flooding source,the water layer was drilled while the normal injection was maintained in the injection wells.Compared with the parallel dual-pipe,the water production was enhanced from 800 m3/d to 2,500 m3/d.Based on features of geological characteristics and recovery requirements,concurrent injection and production for the different layers in a single well was obtained（gas injection/oil production,water injection/oil production）.The technique makes the action of a single well working as that of two so that the per-well efficiency is raised and the well-net optimization is managed in certain area.The technique has been successfully applied in 8 wells such as： SZ36-1,JZ9-3 and LD10-1at Bohai Bay,and received obvious economic benefits.The technique has become an important technical measure of EOR for old oilfields,and created a new completion mode for production completion of new oilfields.