基于广义S变换的低频瞬时能量谱油气检测技术

刘兰锋;刘全新;雍学善;高建虎;

doi:10.11764/j.issn.1672-1926.2005.02.238

天然气地球科学 >

2005 , Vol. 16 >Issue 2: 238 - 241

DOI: https://doi.org/10.11764/j.issn.1672-1926.2005.02.238

天然气地球物理勘探

基于广义S变换的低频瞬时能量谱油气检测技术

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(1. 中国石油勘探开发研究院，北京 100083；2.中国石油勘探开发研究院西北分院，甘肃兰州 730020)

 刘兰锋(1979-) ,男，山东成武人，硕士研究生，现在主要从事小波分析、储层预测、油气检测方法研究及软件编制.

收稿日期: 2005-01-17

修回日期: 2005-01-31

网络出版日期: 2005-04-20

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HYDROCARBON DETETION USING INSTANEOUS ENERGY SPECTRUM OF LOW FREQUENCY BASED ON GENERAL S TRANSFORM

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(1.PetroChina Research Institute of Petroleum Exploration and Devel opment, Beijing 100083, China；
2.Northwest Branch of PetroChina Research Insti tute of Petroleum Exploration and Development, Lanzhou 730020, China)

Received date: 2005-01-17

Revised date: 2005-01-31

Online published: 2005-04-20

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摘要

讨论了S变换的优良性质,并对S变换作了进一步推广。将从地震资料中提取的地震子波代替S变换中的基本小波,实现了应用在地震资料中的广义S变换。通过对原始地震数据做广义S变换,得到了S域中单频率段的复地震道;由单频率段的复地震道进一步求取瞬时属性,得到了广义“三瞬”,即广义瞬时振幅、瞬时频率、瞬时相位(也称单频段的瞬时振幅、瞬时频率、瞬时相位)。当储层中含有流体或气体时,会引起地震波能量和频率的变化,表现为高频段能量的衰减和低频段能量的增强,故利用基于广义S变换的低频瞬时能量谱可进行油气检测。

关键词： S变换; 广义S变换; 瞬时能量谱; 油气检测

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刘兰锋;刘全新;雍学善;高建虎; . 基于广义S变换的低频瞬时能量谱油气检测技术[J]. 天然气地球科学, 2005 , 16(2) : 238 -241 . DOI: 10.11764/j.issn.1672-1926.2005.02.238

Abstract

This paper deeply discussed the excellent chara cteristics of S transform (ST). By replacing the basic wavelet in the ST with ac tual seismic wavelet which was extracted from seismic data, the general S transf orm (GST) was achieved in the seismic data analysis. The general“three instanta neous” attribute (namely general instantaneous amplitude, frequency and phase) can be extracted from single frequency complex seismic trace which is produced b y S transform. When the reservoir was filled with gas or oil, the reflected seis mic energy would be attenuated in high frequency and be enhanced in low frequenc y. Therefore, Hydrocarbon can be detected through the low-frequency instantaneo us energy spectrum based on GST. Moreover, this method had succeed in several ar eas such as Indonesia, Tarim and Junggar.

Key words： S transform; General S transform; Instantaneous energy spectrum; Hydrocarbon detection.

参考文献

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