海拉尔盆地的古河道砂体识别方法
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摘要
本文基于海拉尔盆地贝尔凹陷西北部高精度三维地震资料,通过对时间域、频率域地震属性的分析,研究了河道砂体的变化及分布规律,总结出了一套利用时间域、频率域地震属性识别古河道的方法。其中对河道砂体较为敏感的沿层属性主要有均方根振幅、反射强度梯度、有效带宽及瞬时频度等。利用这种识别方法在该区找到水下分流河道砂体和河口坝砂体,为该区的岩性勘探部署提供了具体目标。
Based on 3-D high-precision seismic data in northwest part of Be'er sag, Haila'er basin and through analyses of seismic attributes in time and frequency domains, the paper studied the variation and distributing law of channel sand bodies and summarized a set of approaches using seismic attributes in time and frequency domains to identify the palaeochannel. Among these attributes, the horizons following attributes sensitive to channel sand body mainly include mean-square-root amplitude, gradient of reflection intensity, effective bandwidth and instantaneous frequency. The underwater split-flow channel sand body and river mouth bar sand body have been found by using this identifying approach, which provided concrete objects for deployment of lithologic exploration in this region.
Based on 3-D high-precision seismic data in northwest part of Be'er sag, Haila'er basin and through analyses of seismic attributes in time and frequency domains, the paper studied the variation and distributing law of channel sand bodies and summarized a set of approaches using seismic attributes in time and frequency domains to identify the palaeochannel. Among these attributes, the horizons following attributes sensitive to channel sand body mainly include mean-square-root amplitude, gradient of reflection intensity, effective bandwidth and instantaneous frequency. The underwater split-flow channel sand body and river mouth bar sand body have been found by using this identifying approach, which provided concrete objects for deployment of lithologic exploration in this region.
引文
[1]纪彤洲,杨迎军,李尚林.相干体技术在河道预测中的应用.石油物探,2003,42(3):399~401
[2]谢东,王永刚,乐权喜.地震属性分析技术在子寅油田开发中的应用.石油物探,2003,42(1):72~76
[3]盛洪,李志荣,龙资强.沿层地震属性分析在川东北储层研究中的应用.物化探计算技术,2003,25(3):201~206
[4]姜岩,周再林,秦月霜.地震属性分析的神经网络岩性识别技术及应用.大庆石油地质与开发,2000,19(5):39~41
[2]谢东,王永刚,乐权喜.地震属性分析技术在子寅油田开发中的应用.石油物探,2003,42(1):72~76
[3]盛洪,李志荣,龙资强.沿层地震属性分析在川东北储层研究中的应用.物化探计算技术,2003,25(3):201~206
[4]姜岩,周再林,秦月霜.地震属性分析的神经网络岩性识别技术及应用.大庆石油地质与开发,2000,19(5):39~41
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