地震拓频处理技术在S油田铜钵庙储层预测中的应用  

Application of seismic frequency extension processing technology in prediction of Tongbomiao reservoir in S Oilfield

作　　者：李文涛 LI Wentao(Hulunbeier subsidiary of daqing oilfield Co.,Ltd,Inner Mongolia,Hulunbeer 021000,China)

机构地区：[1]大庆油田有限责任公司呼伦贝尔分公司,呼伦贝尔021000

出　　处：《物探化探计算技术》2023年第4期420-427,共8页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(41930431)。

摘　　要：S油田主要含油层为铜钵庙组上部砂砾岩,为扇三角洲前缘分流河道砂体沉积。研究区纵向发育三套砂砾岩,是主要目的层,但砂体厚度薄,薄互层频率调谐严重,影响砂体分辨和储层预测。为实现三套砂砾岩的有效区分,采用井震结合的地震资料谱蓝化处理,将频带由10 Hz~60 Hz拓宽至10 Hz~90 Hz,极大提高了地震资料的分辨率和薄储层预测精度。在高分辨率地震数据基础上,采用波形指示反演,更高精度地描述了砂体纵向分布、平面展布及储层发育状况。实钻表明,基于地震拓频处理的砂体预测精度更高,在勘探开发及有利区评价和井位部署中能发挥更重要的作用。The main oil-bearing reservoir in the S oilfield is the glutenite in the upper part of the Tongbomiao formation,which is the distributary channel sand body deposition in the front of the fan delta.Three sets of glutenites are developed longitudinally in the study area,which is the primary target strata.However,the sand body is thin,and the frequency tuning is serious,which affects the sand body resolution and reservoir prediction.In order to effectively distinguish the three sets of glutenite,this paper adopts the spectral blue processing of seismic data combined with well seismic data,effectively broadening the frequency band of the study area from 10~40Hz to 10~90Hz,which significantly improves the reservoir resolution and prediction accuracy.Based on high-resolution seismic data,waveform indication inversion research was conducted to accurately depict the sand body boundary,plane distribution,and reservoir development.The actual drilling verification shows that this paper's sand body prediction accuracy is high,which has a particular guiding significance for the subsequent well location deployment.

关 键 词：拓频处理 谱蓝化 分辨率 薄储层 砂体预测 

分 类 号：P631.4[天文地球—地质矿产勘探]