STUDI DEKOMPOSISI DAN DEKONVOLUSI `SURFACE-CONSISTENT'

• Main Author: Mohammad Rachmat, R.
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/4547
• Institution: Institut Teknologi Bandung

<b> Abstract : </b><p align=\"justify\"> <br /> In the surface-consistent hypothesis, a seismic trace is the convolution of a source operator, a receiver operator, a reflectivity operator (representing the sub-surface structure) and an offset-related operator. In the log/Fourier domain, convolutions become sums and the log of signal amplitude at a given frequency is the sum of source, receiver, structural, and offset-related terms. Recovering the amplitude of the reflectivity for a given frequency is then a linear problem. However, this linear system is underconstrained and there are many possible solutions can be obtained. To overcome this problem, there are 2 sets constrained which can be applied to this system. Hopefully the solution become consistent to the whole frequency.<p align=\"justify\"> <br /> By applying this deconvolution to free-noise synthetic traces, we obtained a good result such as high resolution and the seismic amplitudes are relatively consistent to source variation, offsets, and receiver impulse responses. The other hand, by applying this deconvolution to synthetic traces with noises, the result contained ringing noise which were dominant, although the reflection coefficient still can be identified. While if the deconvolution is applied to real data, the reflection coefficient will not become clear, even though the resolution is still increase.<p align=\"justify\"> <br /> We conclude, that applied this deconvolution to free-noise synthetic traces gave better result than that of to noise synthetic traces. However, to overcome ringing noise, the advances research should be done.