白军辉,杨会东,蔡东梅,付宪弟
BAI Junhui,YANG Huidong,CAI Dongmei,FU Xiandi

• 1:国家能源陆相砂岩老油田持续开采研发中心
• 2:中国石油大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

大庆长垣油田在“双特高”开发阶段面临剩余油高度分散、挖潜难度增大等诸多挑战，传统的精细油藏描述做法已无法满足精准开发的需求。通过深入分析测井解释、构造描述、储层刻画、剩余油表征中遇到的测井数据多源异构性导致的参数解释效率低下、低序级断层识别精度不足、复合砂体中单一河道边界识别难及剩余油模拟精度偏低等关键性难题，运用测井参数一体化补齐、井震结合构造建模、复合砂体构型精细刻画以及高精度数值模拟等技术，建立了以大数据、智能算法和多学科融合为核心的精细油藏描述方案，实现了测井全参数精细解释、断距为3～10 m断层的精准表征、复合砂体单一河道边界的识别以及平面10 m级剩余油的精准表征，实现了当前资料、技术条件下地质体的精准表征。实际应用结果表明：采用新一代精细描述方法，断点组合率可提升至95.5%，厚度在2 m以上储层的预测符合率达到85%以上，成功引导开发布井由“躲断层”向“靠断层”转变；断层边部部署了500多口大斜度井，阶段性增油量近400×10~4 t，显著提高了剩余油的挖潜效率。研究成果为“双特高”老油田的高效开发提供了技术支持，并推动精细油藏描述向智能化、定量化方向发展。
In “double ultra-high” development stage, Daqing Placanticline oilfield faces challenges of highly scattered remaining oil and more difficulty in potential tapping, and traditional fine reservoir characterization methods cannot meet the demand of precise development. Critical challenges are deeply analyzed including inefficient parameter interpretation, insufficient identification accuracy of low order faults, difficulty in identifying single channel boundaries in composite sandbodies and low accuracy of remaining oil simulation, caused by multi-source heterogeneous logging data appeared in logging interpretation, structural description, reservoir characterization and remaining oil characterization. Fine reservoir characterization scheme focused on big data, AI algorithms and multi-disciplinary integration is established by employing techniques of integrated logging parameters completion, well-seismic integrated structural modeling, fine characterization of composite sandbodies architecture and high-accuracy numerical simulation, achieving fine interpretation of complete logging parameters, precise characterization of faults with throws of 3～10 m, identification of single channel boundaries in composite sandbodies and precise characterization of remaining oil at 10-meter scale, and realizing accurate characterization of geobodies in current data and technical conditions. Field applications demonstrate that the new-generation method increases break points combination rate to 95.5%, prediction coincidence rate of reservoirs thicker than 2 m exceeds 85%, and successfully guides development well placement strategy from “avoiding faults” to “targeting near faults”. Over 500 high-angle deviated wells are deployed at fault edges, and achieve staged incremental oil production of nearly 400×10~4 t, significantly enhancing potential tapping efficiency of remaining oil. The research provides technical support for efficient development of mature oilfields in “double ultra-high” stage and promotes advancement of reservoir characterization towards intelligence and quantification.

关键词(KeyWords)： 精细油藏描述;测井参数解释;低序级断层识别;复合砂体构型;剩余油表征与挖潜
fine reservoir characterization;logging parameter interpretation;low-order fault identification;composite sandbodies architecture;remaining oil characterization and potential tapping

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): 白军辉,杨会东,蔡东梅,付宪弟
BAI Junhui,YANG Huidong,CAI Dongmei,FU Xiandi

DOI: 10.19597/J.ISSN.1000-3754.202505039

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