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物探与化探  2021, Vol. 45 Issue (4): 998-1003    DOI: 10.11720/wtyht.2021.1167
  方法研究·信息处理·仪器研制 本期目录 | 过刊浏览 | 高级检索 |
基于去低频化的低幅度构造识别方法研究及应用
夏红敏1(), 郑小文2, 黄捍东3, 肖炎辉3, 董金超3, 廖俊3
1.中石化石油勘探开发研究院,北京 100083
2.中海油研究总院,北京 100028
3.中国石油大学(北京) 地球物理学院,北京 102249
The application of low-amplitude structure based on low-frequency reduction
XIA Hong-Min1(), ZHENG Xiao-Wen2, HUANG Han-Dong3, XIAO Yan-Hui3, DONG Jin-Chao3, LIAO Jun3
1. Sinopec Petroleum Exploration and Development Research Institute,Beijing 100083,China
2. CNOOC Research Institute,Beijing 100028,China
3. College of Geosciences,China University of Petroleum-Beijing(Beijing),Beijing 102249,China
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摘要 

随着勘探程度的不断提高,低幅度构造油气藏日益受到重视。目前识别低幅度构造的方法不能有效消除地震资料中包含的构造低频背景信息,无法精确识别低幅度构造。本文以去低频化为基础,利用趋势分解法,通过搜索构造起伏拐点,实现对低幅度构造成图,再结合小波分解在大尺度时频域具有良好的连续性,将构造数据进行小波变换和逆变换,最终得到消除构造低频背景的低幅构造解释图。E盆地北部的实际应用显示,基于去低频化的低幅度构造识别方法,增强了局部微构造特征,同时也弥补了构造高程差及随机因子对低幅度构造的影响,达到低幅度构造成图完整精细的目的,对后续构造幅度低的复杂油气藏的勘探开发具有重大的指导意义。

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夏红敏
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肖炎辉
董金超
廖俊
关键词 低幅度构造趋势分解小波变换低频背景    
Abstract

With the continuous improvement of exploration degree,more and more attention has been paid to low-range structural oil and gas reservoirs.Current methods for identifying low-amplitude structures cannot effectively eliminate low-frequency structural background information contained in seismic data,and cannot accurately identify low-amplitude structures.In this paper,on the basis of de-frequency reduction,the trend decomposition method was used in the search for structural inflection points,and the low-amplitude structure was graphed. Combined with the wavelet decomposition method,the continuity in the large-scale time-frequency domain is good.The inverse transform finally obtains a low-amplitude structure explanatory diagram that eliminates the low-frequency background of the structure.The practical application in the northern part of E Basin shows that the low-amplitude structure identification method based on de-frequency reduction enhances the local micro-structural characteristics,and also makes up for the influence of structural elevation difference and random factors on low-amplitude structures.The purpose of the complete and detailed map is of great guiding significance for the exploration and development of complex oil and gas reservoirs with low structural amplitude.

Key wordslow-amplitude structure    trend decomposition    wavelet decomposition    low-frequency background
收稿日期: 2020-04-09      修回日期: 2021-03-03      出版日期: 2021-08-20
ZTFLH:  P631.4  
基金资助:国家科技重大专项(2017ZX05005-004-009);中石化科技部项目(PE19008-2);中石化科技部项目(P18075-5)
作者简介: 夏红敏(1970-),女,高级工程师,博士研究生,研究方向为地震资料综合解释。Email: xiahm.syky@sinopec.com
引用本文:   
夏红敏, 郑小文, 黄捍东, 肖炎辉, 董金超, 廖俊. 基于去低频化的低幅度构造识别方法研究及应用[J]. 物探与化探, 2021, 45(4): 998-1003.
XIA Hong-Min, ZHENG Xiao-Wen, HUANG Han-Dong, XIAO Yan-Hui, DONG Jin-Chao, LIAO Jun. The application of low-amplitude structure based on low-frequency reduction. Geophysical and Geochemical Exploration, 2021, 45(4): 998-1003.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2021.1167      或      https://www.wutanyuhuatan.com/CN/Y2021/V45/I4/998
Fig.1  低幅度构造识别技术路线
Fig.2  构造拐点示意
Fig.3  构造起伏拐点及搜索半径示意
Fig.4  两种构造成图法对比
a—趋势分解低频背景;b—小波分解低频背景;c—趋势分解低幅构造细节;d—小波分解低幅构造细节
Fig.5  E盆地北部示意
Fig.6  趋势分解法细节构造
Fig.7  小波分解法细节构造
Fig.8  研究区M1层低幅度局部构造平面对比
a—M1层原始局部构造平面;b—基于趋势分解法M1层局部构造平面;c—基于小波分解法M1层局部构造平面
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