石油勘探与开发2026，Vol.53Issue(1)：94-106,13.DOI:10.11698/PED.20250339
陆相分流河道砂体地震预测方法
Seismic prediction methods for continental distributary channel sands:OVT high-resolution processing,multi-attribute fusion and varible-scale inversion
摘要
Abstract
To address the challenges of complex fluvial sandbody distribution and difficult remaining oil recovery in mature continental oilfields,this study focuses on key issues in reservoir identification such as ambiguous narrow-channel boundaries and subdivision of multi-stage superimposed sandbodies.Taking the Upper Cretaceous continental sandstone in the Sazhong Oilfield of the Daqing Placanticline as an example,a technical system integrating OVT high-resolution processing,multi-attribute fusion,and varible-scale inversion was developed to establish a complete workflow from seismic processing to reservoir prediction and remaining oil recovery.The following results are obtained.First,the Offset Vector Tile(OVT)seismic processing technology is extended,for the first time,from fracture imaging to sandbody prediction.A geology-oriented OVT partitioning method is developed to significantly improve the imaging accuracy,enabling identification of channel sandbodies as narrow as 50 m.Second,an amplitude-coherence multi-attribute fusion method is proposed for predicting narrow channel boundaries between wells.Constrained by a sedimentary unit-level sequence chronostratigraphic framework,this method accurately delineates 800-2 000 m long subaqueous distributary channels with bifurcation-convergence features.Third,considering the superimposition of multi-stage channels,a three-level variable-scale stratigraphic model(sandstone groups,sublayers,sedimentary units)is constructed to overcome single-scale modeling limitations,successfully characterizing key sedimentary features like meandering river"cut-offs"through inversion results.Based on these advances,a direct link between seismic prediction and remaining oil recovery is established.The horizontal wells deployed using narrow-channel predictions encountered oil-bearing sandstones in the horizontal section by 97％,and achieved initial daily production of 12.5 t per well.Precise identification of individual channel boundaries within 17 composite sandbodies guided recovery processes in 135 wells,yielding an average daily increase of 2.8 t per well and a cumulative increase of 13.6×104t.关键词
分方位高分辨率处理/多属性融合/变尺度反演/储层预测/剩余油/白垩系/萨中油田/松辽盆地Key words
OVT high resolution processing/multi-attribute fusion/varible-scale inversion/reservoir prediction/remaining oil/Cretaceous/Sazhong Oilfield/Songliao Basin分类
能源科技引用本文复制引用
徐立恒,罗庆,赵海波,宋微,李红星,黄勇,郭亚杰,孙衍民,刘朋坤..陆相分流河道砂体地震预测方法[J].石油勘探与开发,2026,53(1):94-106,13.基金项目
国家科技重大专项"整装特高含水油藏提高采收率技术与集成示范"(2025ZD1407000) （2025ZD1407000）
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) （2023ZZ22）
