大庆石油地质与开发2026，Vol.45Issue(5)：1-10,10.DOI:10.19597/J.ISSN.1000-3754.202504071
大庆长垣南部敖包塔油田扶余油层致密油储层成岩作用
Diagenesis of Fuyu tight oil reservoir in Aobaota oilfield of southern Daqing Placanticline
摘要
Abstract
Current research on the reservoir-controlling factors of Fuyu reservoir in Aobaota oilfield of southern Daq-ing Placanticline mainly focuses on sedimentary facies,while insufficient analysis of diagenetic control on reser-voirs hinders the establishment of sweet-spot evaluation index system.Based on experimental data such as thin-sec-tion identification,whole-rock analysis,scanning electron microscopy and clay X-ray diffraction,charts for diage-netic facies classification with cementation porosity reduction rate and compaction porosity reduction rate as the core are established to clarify sweet spots for exploration,development and well deployment.The results show that the main diagenesis types include compaction,cementation and dissolution,with compaction being the primary factor in porosity reduction,followed by cementation.Compaction exhibits strong screening effect,eliminating frag-ile pores while preserving pathways with high compaction resistance and good connectivity.Cementation demon-strates strong differentiation,with localized pore precipitation leading to highly uneven pore radius distribution.5 types of diagenetic facies are identified in Fuyu reservoir in studied area,with strong compaction-extremely weak cementation facies prioritized for target sweet-spot area and weak compaction-strong cementation facies being avoid-ed.The research provides significant guidance for reevaluating the main controlling factors of tight oil sweet spots in Aobaota oilfield of southern Daqing Placanticline and supporting the establishment of sweet-spot evaluation index system.关键词
敖包塔油田/扶余油层/致密油/成岩作用/孔隙度Key words
Aobaota oilfield/Fuyu reservoir/tight oil/diagenesis/porosity分类
能源科技引用本文复制引用
罗庆,张金友,陈国松,孔凡顺,臧伟,王现华,刘强,胡峰..大庆长垣南部敖包塔油田扶余油层致密油储层成岩作用[J].大庆石油地质与开发,2026,45(5):1-10,10.基金项目
中国石油天然气股份有限公司重大科技专项"松辽盆地致密油规模效益增储关键技术研究"(2025YQXN201). （2025YQXN201）
