渤海油田低渗储层开采技术研究进展与展望

Research progress and prospect of low-permeability reservoir exploitation technologies in Bohai oilfield

海上低渗油田的高效开采已成为海洋油气增储上产的重要方向。从2006年开展低渗储层压裂先导试验开始,渤海油田经过十余年的攻关与实践逐步总结出适应于渤海低渗储层特征的开采策略,并针对常规低渗储层、低渗/特低渗储层和复杂岩性低渗储层特征形成压裂开采技术体系,包括常规低渗储层整体压裂技术、防砂卡精细分层压裂技术,低渗/特低渗储层复杂裂缝改造技术、分层暂堵压裂技术,复杂岩性低渗储层缝控压裂技术、水力喷射压裂及防砂技术、裂缝蚀孔酸压技术。“十四五”期间渤海油田将重点攻关特低渗储层注气开采、大规模低成本压裂和裂缝监测等核心技术,持续推动渤海低渗储量实现规模化高效开采,为中国海上低渗油田开采技术的进一步发展提供参考。

The efficient development of offshore low-permeability oilfields is becoming an important direction for increasing offshore oil and gas storage and production.Starting from the pilot test of low-permeability reservoir fracturing in 2006,Bohai oilfield has gradually summarized the development strategies suitable for low-permeability reservoirs after more than ten years of research and practice.A fracturing technology system is formed for conventional low-permeability reservoirs,low-permeability/ultra-low permeability reservoirs,and complex lithology low-permeability reservoirs.This technical system encompasses various techniques such as integrated fracturing technology and sand control fine layer fracturing technology for conventional low-permeability reservoirs;complex fracture reconstruction technology and layered temporary plugging fracturing technology for low-permeability/ultra-low permeability reservoirs;fracture-controlled fracturing technology,hydraulic jet fracturing and sand control technology for complex lithology low-permeability reservoirs.During the“14th Five-Year Plan”period,Bohai oilfield will focus on the core technologies such as gas injection development technology for ultra-low permeability reservoir,large-scale and low-cost fracturing and monitoring technology.On this basis,the large-scale and efficient development of low permeability reservoir in Bohai oilfield will be achieved,which provides a reference for further technology development of offshore low-permeability exploitation in China.