文章详细信息

大庆长垣南部葡萄花-敖包塔地区葡萄花油层整体构造解释及油气聚集有利区优选
Overall structural interpretation of Putaohua reservoir and favorable area optimization for hydrocarbon accumulation in Putaohua-Aobaota area of southern Daqing Placanticline

周嘉宇
ZHOU Jiayu

1:中国石油大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

大庆长垣南部葡萄花-敖包塔地区油气资源丰富，但构造复杂、整体认识不够清晰，以往研究多以采集三维地震工区范围为研究单元，这种研究方法对于多地震工区、大面积研究区、井位分布不均匀区域存在较大不适应性，会造成各研究区之间边界处构造认识不统一，多解性强，影响了有利区的优选。利用基于时差空变校正的多工区拼接技术、基于等时方差体的三维断层解释技术、多速度融合速度场构建技术对葡萄花-敖包塔地区葡萄花油层现今的断层发育情况、发育期次以及构造圈闭类型进行了详细研究，深化了整体构造特征认识。结果表明：现今葡萄花油层构造整体为近南北走向的不对称背斜构造，总体趋势北高南低，从轴部向两翼构造倾角加大，西陡东缓；断层类型以正断层及其组合断层为主，走向以近南北向为主；斜坡区反向断层遮挡区为有利圈闭。研究成果对葡-敖地区及周边油田有利评价目标优选具有指导意义。
Putaohua-Aobaota area in southern Daqing Placanticline has abundant oil and gas resources, but the structure is complex, and overall understanding is unclear. Previous studies mostly take 3D seismic survey areas as research units, which proved inadequate for multiple seismic survey areas, large-scale studied areas and areas with uniform well distribution. This method led to inconsistent structural understanding at the boundaries between different studied areas and high ambiguity, affecting the selection of favorable areas. By using multi-survey area splicing technology based on time difference-varying spatial correction, 3D fault interpretation technology based on isochronous variance bodies and multi-velocity fusion velocity field construction technology, current status of fault development, development sequences and structural trap types in Putaohua reservoir of Putaohua-Aobaota area are studied in detail, deepening the understandings on the overall structural characteristics. The results show that, the current structure of Putaohua reservoir is an asymmetric anticline near N-S strike, with a general strike of higher in the north and lower in the south. The structural dip angle increases from the axis to the two wings, with steep western slopes and gentle eastern slopes. The dominant fault types are normal faults and their combinations, with strike primarily near N-S. The reverse fault closure areas in the slope zones are favorable traps. The research provides guidance for the optimization of favorable evaluation targets in Putaohua-Aoguta area and surrounding oilfields.

关键词(KeyWords)： 葡萄花-敖包塔地区;葡萄花油层;构造解释;精细构造特征;有利圈闭;大庆长垣
Putaohua-Aoguta area;Putahua reservoir;structural interpretation;fine structural characteristics;favorable trap;Daqing Placanticline

基金项目(Foundation): 中国石油天然气股份有限公司攻关性应用型科技专项“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): 周嘉宇
ZHOU Jiayu

DOI: 10.19597/J.ISSN.1000-3754.202505004