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小波变换在高分辨率层序地层分析中的应用
引用本文:赵军龙,李娜.小波变换在高分辨率层序地层分析中的应用[J].地球物理学进展,2008,23(4):1230-1235.
作者姓名:赵军龙  李娜
作者单位:1. 西安石油大学油气资源学院,西安,710065
2. 长安大学地质工程与测绘工程学院,西安,710054
基金项目:西安石油大学校科研和校改项目
摘    要:为了分析测井曲线一维小波变换用于高分辨率层序地层研究的方法效果,从小波系数模极值点、过零点与信号突变点数学模型出发,分析高分辨率层序地层研究对测井曲线分层的要求,探讨测井小波变换最大分级和最佳小波选择,以一取心率高探井为例,用两种小波函数对四种测井曲线进行一维小波变换和高分辨率地层界面解译,进而在某油区用小波分析开展高精度地层对比.研究表明,选择恰当窗宽小波决定测井曲线小波分层精度、测井数据sym6 小波分解的小层界面划分效果要稍好于db4小波、常规测井曲线正则性小波分解可以很好地满足高分辨率层序地层划分要求.

关 键 词:小波系数模  高分辨率层序  测井曲线  分层  地层对比
收稿时间:2008-1-10
修稿时间:2008-3-20

Application of wavelet transform to high resolution sequence analysis
ZHAO Jun-long,LI Na.Application of wavelet transform to high resolution sequence analysis[J].Progress in Geophysics,2008,23(4):1230-1235.
Authors:ZHAO Jun-long  LI Na
Abstract:For the purpose of analyzing the 1-D wavelet transform method and effect of logging curves to high-resolution sequence research, we study the demand that the high-resolution sequence study taking to the logging curves in different gradation sequences demarcation. We also research the optimum decomposition gradation of wavelet transform in logging curves and the choosing of optimum wavelet function. Then we take the example of a prospecting well in the Ordos basin that is a good coring well, and make the wavelet transform on four curves with two wavelet functions. The study indicates that the optimum windows width decides the layering precision, interface partition with sym6 wavelet is better than with db4, canonical wavelet decomposition of conventional logging curves can well meet the demand of coenocorrelation.
Keywords:wavelet coefficient module  high resolution sequence  logging curve  layering  coenocorrelation
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