地震属性

Scarlett

郝老师，请教个问题，我在用petrel提取属性的时候，有个wavelet convolution属性，想请问下选取的子波与原始地震体的关系？我试着用35Hz雷克子波参与进去，出来地震体频带变窄，主频降低，有点想不明白原因？

Joseph

我没有使用过这个属性，不过Help里有这个内容：

Wavelet convolution

The Wavelet convolution attribute allows you to convolve a wavelet with the select seismic data, where the wavelet can be considered as or act as a filter.

Convolution is a mathematical operation on two functions that is the most general representation of the process of linear (invariant) filtering. It can be applied to any two functions of time or space (or other variables) to yield a third function, the output of the convolution. Although the mathematical definition is symmetric with respect to the two input functions, it is common in signal processing to say that one of the functions is a filter acting on the other function.

The convolution and the following operations are preformed in Frequency domain.

Normalization : Application of the Parseval’s theorem before convolution.

Scaling: Multiplies the amplitude of the frequency components by the selected value. (default: 1)

Scarlett

嗯，我也看到这个了，只是很奇怪，我用30Hz子波滤掉的应该是低频信息，现在实际情况是我的高频全被滤掉了