石油地质与工程2025，Vol.39Issue(1)：74-80,86,8.
基于叠前扩展弹性阻抗的波形指示反演技术在西湖凹陷C油田深层薄互层储层刻画中的应用
Application of waveform indication inversion technique based on pre-stack extended elastic impedance in deep thin interlayer reservoir characterization in C oilfield,Xihu Sag
摘要
Abstract
Fine characterization of reservoirs is meaningful for the efficient development of oil and gas fields.Due to the low resolution of seismic data and the superposition of longitudinal wave impedance of sandstone and mudstone,conventional reservoir prediction methods are difficult to achieve accurate prediction and fine characterization of sand bodies.Based on pre-stack extended elastic impedance,the waveform indication inversion technique greatly improves the accuracy and precision of characterizing thin interbedded reser-voirs.Firstly,the correlation between lithology and elastic properties of different rotation angles is analyzed by logging petrophysics,the best fitting angle is obtained,and the extended elastic impedance curve reflec-ting lithology is obtained.Then,using CRP seismic trace data,intercept and gradient attribute volumes are calculated,and the extended elastic impedance reflection coefficient volume is obtained based on the best fitting angle.Finally,based on the expansion of the elastic impedance reflection coefficient volume,high-resolution reservoir prediction results were obtained using waveform indication inversion method.The appli-cation results of C oilfield in Xihu Sag show that the reservoir inversion results not only retain the trend of thick sandstone,but also greatly improve the prediction ability of thin interlayer reservoir and mudstone in-terlayer.The inversion results have a high coincidence rate with sandstone,and the prediction coincidence rate of sand body above 10 m and 5 m in the target layer is 90%and 80%respectively.It has been con-firmed that this technology solves the problem of sandstone shale impedance overlap and low resolution in predicting thin interbedded reservoirs,greatly improving the accuracy and precision of thin-layer inver-sion,and has a broad application prospect.关键词
西湖凹陷/波形指示反演/叠前扩展弹性阻抗反演/高分辨率反演/薄互层储层刻画Key words
Xihu Sag/waveform indication inversion/pre-stack extended elastic impedance inversion/high-resolution inversion/characterization of thin interbedded reservoirs分类
天文与地球科学引用本文复制引用
廖恒杰,娄敏,何贤科,刘江,段冬平,李炳颖,包全..基于叠前扩展弹性阻抗的波形指示反演技术在西湖凹陷C油田深层薄互层储层刻画中的应用[J].石油地质与工程,2025,39(1):74-80,86,8.基金项目
国家科技重大专项"东海厚层非均质性大型气田有效开发关键技术"(2016ZX05027-004). （2016ZX05027-004）
