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窄条带状背斜油藏边部注水开发产能影响因素

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JY油田Y油藏为典型窄条带状背斜油藏,其储集层注入水极易沿河道中心方向突进,导致油井快速水淹,产量递减快;由于对水体大小、构造幅度、储集层物性等产能影响因素认识不清,此类油藏开发难度较大.针对上述问题,建立了窄条带状背斜油藏精细数值模型,通过对比论证提出了"边部注水+逐步转注"开发,并在此基础上开展了水体大小、构造幅度、储集层物性等参数对产能的影响研究.结果表明:"边部注水+逐步转注"开发不仅可以增大边水能量,使得井网双向受效,还可以有效延缓构造高部位油井的见水时间,大幅度降低油井含水率.另一方面,在考虑油藏构造特征的前提下,量化了不同影响因素下的产能特征,明确了水体大小、构造幅度、垂向渗透率与水平渗透率之比等参数的合理界限,论证了不同储集层物性下油藏面积的适应性.可为同类型油藏改善注水开发效果提供借鉴.
Factors Influencing Productivity of Edge Waterflood in Elongated Anticlinal Reservoirs
The Y reservoir in the JY oilfield is a typical elongated anticlinal structure,where the injected water readily advances along channel centerline,resulting in rapid water-flooding and rapid production decline in producers.Development of such reservoirs is challeng-ing due to unclear factors influencing productivity,such as water body size,structural amplitude,and reservoir physical property.To ad-dress these issues,a fine numerical model was established for the elongated anticlinal reservoir,and an"edge waterflood+progressive pro-ducer-injector conversion"process was proposed.On this basis,the influences of water body size,structural amplitude,and reservoir physical property on productivity were analyzed.The results indicate that the"edge waterflood+progressive producer-injector conversion"process en-hances the edge water energy to allow for bidirectional responses of well patterns,and also delays water breakthrough in producers at the struc-tural high to significantly reduce the water cut of oil well.Furthermore,considering the structural characteristics of the reservoir,the produc-tion performance under different factors were quantified,reasonable limits for the parameters such as water body size,structural amplitude,and the ratio of vertical permeability to horizontal permeability were defined,and the adaptability of reservoir area under different reservoir physical properties was demonstrated.The study results provide valuable insights for improving waterflood effects in similar reservoirs.

elongated anticlinal reservoiredge waterfloodfactor influencing productivitystabilizing oil production and controlling water cutproducer-injector conversionnumerical simulation

谢启超、田亚飞、乐平、宋鹏、刘新菊、刘建、刘万涛

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中国石油 长庆油田分公司 勘探开发研究院,西安 710018

中国石油 长庆油田分公司 第二采油厂,甘肃 庆阳 745600

西南石油大学 油气藏地质及开发工程国家重点实验室,成都 610500

窄条带状背斜油藏 边部注水 产能影响因素 稳油控水 油井转注 数值模拟

中国石油前瞻性基础性技术攻关项目四川省重点研发计划

2021DJ33012020YFQ0034

2024

10.7657/XJPG20240507

新疆石油地质
新疆石油学会

新疆石油地质

CSTPCD北大核心
影响因子：0.985
ISSN：1001-3873
年,卷(期)：2024.45(5)