【摘要】 对于井约束的波阻抗反演来说,子波提取是反演中最重要的技术环节之一.在一个工区有多口井的条件下,根据不同的井可以提取不同的子波.过井的测线或井控制的区块范围内提取的子波,往往只在这条测线或这个区块范围内,获得最佳的反演结果.而在其它测线或其它井控制的区域,不一定会得到好的结果.如果采用不同的子波,分别在其控制测线或区块进行反演,就会出现不同井控制区域或测线上岩性的不闭合.子波的变化造成反演结果岩性的变化,进而造成岩性解释的错误.本文借用速度分析中多道相关的思想,给出了多井条件下子波提取的方法和选择最佳子波的定量标准.更多还原

【Abstract】 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.更多还原