优势频带相位分析技术在AA区块断层解释中的应用
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摘要
AA区块断裂系统复杂,断层延伸短、断距小,存在连续性差、搭接关系不明等问题,应用常规地震解释方法对此类断层进行识别较为困难。针对研究区存在的问题,利用改进的小波变换分频技术研究断层的最佳成像频带(即优势频带);在最佳成像频带内,通过浏览不同频率的相位切片,优选出断层组合关系最清楚、最全面的优势频带相位切片,观察其相位滞后分布特征,较好地实现了断层精细解释和断裂系统识别。实际应用结果表明,优势频带相位分析技术能识别更多的地层不连续性信息,弥补传统相干等方法的不足,对断层搭接关系的识别和异常边界的划定更为准确。
The complex faulted system in AA Block is characterized by short extended distance and small fault throw,and the faults has bad continuity and uncertain contact relationship,which leads to the difficulty in the fault identification by conventional seismic interpretation. Aiming at the problem,we adopted the improved wavelet transform frequency division technique to study the optimum imaging frequency band(that is the dominant frequency band).In the optimum imaging frequency band,by browsing the phase slices with different frequency,the slices with clearest and most comprehensive fault combination relationship were optimized.Then,by observing its phase delaying characteristic,fine fault interpretation and faulted system identification were well done.Actual application shows that dominant frequency band phase analysis technique can recognize more discontinuous information of formations,which compensates the deficiency of traditional coherent method and is more accurate for the delimitation of fault boundary.
The complex faulted system in AA Block is characterized by short extended distance and small fault throw,and the faults has bad continuity and uncertain contact relationship,which leads to the difficulty in the fault identification by conventional seismic interpretation. Aiming at the problem,we adopted the improved wavelet transform frequency division technique to study the optimum imaging frequency band(that is the dominant frequency band).In the optimum imaging frequency band,by browsing the phase slices with different frequency,the slices with clearest and most comprehensive fault combination relationship were optimized.Then,by observing its phase delaying characteristic,fine fault interpretation and faulted system identification were well done.Actual application shows that dominant frequency band phase analysis technique can recognize more discontinuous information of formations,which compensates the deficiency of traditional coherent method and is more accurate for the delimitation of fault boundary.
引文
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[2]毕俊凤.优势频带分频相位分析技术的应用[J].工程地球物理学报,2008,5(2):192-195
[3]柏冠军.三维地震资料微机管理及可视化解释系统研究与开发[D].陕西西安:西北大学,2006
[4]赵爽,李仲东,许红梅.分频解释技术及其在陆相砂岩地层地震勘探中的应用分析[J].矿物岩石,2006, 104(2):106-110
[5]叶泰然,苏锦义,刘兴艳.分频解释技术在川西砂岩储层预测中的应用[J].石油物探,2008,47(1): 72-76
[6]杨金山,丁艳红,李志勇,等.频谱成像技术在泌阳凹陷深凹区储层预测中的应用[J].石油物探,2010,49 (1):54-57
[7]李绪宣,李维新,张益明.琼东南盆地天然气成藏特征及地震识别技术[J].中国海上油气,2006,18(2): 79-86
[8]张延庆,魏小东.谱分解技术在QL油田小断层识别与解释中的应用[J].石油地球物理勘探,2006,41 (5).584-586
[9]Partyka G,Gridley J,Lopez J.Interpretational applications of spectral decomposition in reservoir characterization [J].The Leading Edge,1999,18(3): 353-360
[10]王西文,苏明军,刘军迎,等.基于小波变换的地震相干体算法及其应用[J].石油物探,2002,41(3): 334-338
[11]叶增炉.小波相干技术及其在地震解释中的应用[D].四川成都:成都理工大学,2006
[12]王彦君,雍学善,刘应如,等.小断层识别技术研究及应用[J].勘探地球物理进展,2007,30(2):135-139
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