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《Progress In Geophysics》 2003-04
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Wavelet extraction method of wave impedance inverse with multi-well restrictions

XU Shen-hui~(1,2),MA Jin-feng~3(1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2. Sinopec Star Petroleum Co.Ltd.,Beijing 100083, China;3. Geology Department of Northwest University, Xi'an 710069, China)  
Wavelet extraction is the most important technique in the wave impedance inverse with well restrictions. Different type of wavelet can be extracted from the different well when more than one well is located at the same region. Usually, the optimal inverse results only can be obtained within the profile or zone if the wavelet is extracted based on the across well profile or well restricting belts. Namely, the good results cannot be surely obtained on other profiles or zones. As a result, the unclose of zones constricted by different well and lithology in profile will present if the inverse is respectively carried out by different wavelet in their each restricting profiles or zones. The change of wavelet will result in the different inverse results, which will finally lead to the wrong interpretation of lithology. In this paper, the idea of correlation among multi-stations in the velocity analysis is used to pursuit the method of wavelet extraction with multi-well restriction and the quantitative criterion of determining the optimal wavelet.
【Fund】: 国家自然科学基金(H40144017)资助.
【CateGory Index】: P631.4
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