杨会东,刘晨旭,王阳,李凯,周华建,孟令东,刘攀
YANG Huidong,LIU Chenxu,WANG Yang,LI Kai,ZHOU Huajian,MENG Lingdong,LIU Pan

• 1:中国石油大庆油田有限责任公司勘探开发研究院
• 2:东北石油大学地球科学学院
• 3:中国石油大庆油田有限责任公司第一采油厂

摘要(Abstract)：

针对大庆长垣油田三角洲前缘小断层表征难、窄河道井间砂体识别精度低及挖潜手段单一等难题，利用地质、地震和生产资料，从整体构造建模、窄小河道描述和剩余油挖潜方面，对小地质体精细刻画及高效挖潜方式进行研究。结果表明：通过沉积单元级整体构造建模，实现了构造表征尺度由油层组级向沉积单元级转变，断距大于等于3 m断层的断点组合率达到96.8%；通过定性属性分析与定量地震反演的双约束方法，解决了以往窄小河道定量预测的难题，砂岩厚度大于等于2 m的砂体预测符合率达到86.7%；基于剩余油规模分级，形成了差异化挖潜策略和原则，即大规模富集区部署大斜度井和水平井实现高效动用，小规模富集区通过超短半径井定向挖潜，局部零散区依托压裂-补孔联动措施提升单井产能。研究成果突破了小地质体精细刻画和靶向挖潜的技术瓶颈，可为同类油藏小地质体识别与挖潜提供指导。
To address challenges including difficult characterization of minor faults, low inter-well identification accuracy of narrow channel sandbodies, and limited potential tapping approach for delta front of Daqing Placanticline oilfield, this study employs geological, seismic and production data to investigate fine characterization method and efficient potential tapping strategy for small geobodies through integrated structural modeling, narrow channel description and remaining oil potential tapping. The results show that integral structural modeling at sedimentary unit scale advances structural characterization from reservoir member level to sedimentary unit level, with fault-point combination rate for faults with throws ≥3 m reaching 96.8%. Dual-constrained approach of qualitative attribute analysis and quantitative seismic inversion resolves previous limitation in quantitative prediction of narrow channels, yielding prediction accuracy of 86.7% for sandbodies with thickness ≥2 m. Based on remaining oil scale classification, differentiated potential tapping strategy and principle are established, with high-angle deviated well and horizontal well deployed in large-scale enriched areas for efficient producing, ultra-short-radius well deployed in small-scale enriched areas for targeted potential tapping, and fracturing-reperforation stimulation in localized scattered zones to enhance single-well productivity. The research overcomes technical bottleneck of fine characterization and targeted potential tapping of small geobodies, and provides guidance for identification and potential tapping of small geobodies in similar reservoirs.

关键词(KeyWords)： 三角洲前缘;小地质体;构造建模;地震反演;剩余油挖潜;大庆长垣油田
delta front;small geobodies;structural modeling;seismic inversion;remaining oil potential tapping;Daqing Placanticline oilfield

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份有限公司重大科技专项“中高渗油田特高含水期大幅度提高采收率技术研究”(2023ZZ22)

作者(Author): 杨会东,刘晨旭,王阳,李凯,周华建,孟令东,刘攀
YANG Huidong,LIU Chenxu,WANG Yang,LI Kai,ZHOU Huajian,MENG Lingdong,LIU Pan

DOI: 10.19597/J.ISSN.1000-3754.202504065

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