第四代分层注水技术内涵、应用与展望

Connotation, application and prospect of the fourth-generation separated layer water injection technology

针对目前分层注水技术存在的问题及生产需求,开展了第4代分层注水技术研究,介绍了其内涵、核心工具及核心技术,分析了现场应用情况,并进行了技术发展展望。第4代分层注水技术内涵为实现注水井单井分层压力和注水量的数字化实时监测,实现区块和油藏注水动态监测的网络信息化,实现注水方案设计与优化和井下分层注水实时调整为一体的油藏、工程一体化。研发了作为核心工具的一体化配水器,开发了层段流量检测、配注量调整等关键技术,并开展了区块试验,达到了预期效果。为进一步满足生产要求,对井下层段流量检测、井筒无线通信、井下自发电和易损部件投捞技术等核心环节仍需持续攻关,并加强与油藏工程的有机结合,形成可持续支撑水驱开发的、系统的、完善的第4代分层注水技术。

The fourth-generation separated layer water injection technology was studied aiming at problems existing in current separated layer water-flooding technologies and production requirements. This paper discussed the connotation, core tool and key technologies, analyzed field application and prospected further development. The connotation is to realize digital real-time monitoring on single-well separated layer pressure and injection rate of injectors, network informationization of injection performance monitoring of blocks and reservoirs, and integrated reservoir and production engineering by combining injection program design and optimization with real-time adjustment of down hole separated layer water injection. An integrated water distributor, a core tool for this technology, and some key technologies including interval flow rate detection and injection allocation adjustment were developed. Moreover, this new technology was piloted in blocks and achieved expected results. In order to meet production requirements, it is necessary to keep research on key technologies, such as downhole interval flow rate detection, wellbore wireless communication, downhole self-power generation and vulnerable components fishing. In addition, this technology shall be properly combined with reservoir engineering, thereby developing a systematical and complete fourth-generation separated layer water injection technology that can underpin water flooding development sustainably.