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Effectiveness Analysis of 90 Degree Phase Rotation Technology in Thin Reservoir Prediction
Author(s) -
LI Tingting,
ZHAO Yanqi,
ZHANG Xingxing,
SHI Yue
Publication year - 2015
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12305_19
Subject(s) - degree (music) , rotation (mathematics) , phase (matter) , geology , mathematics , geometry , physics , acoustics , quantum mechanics
Seismic waveform reflects the basic information of seismic data which mainly includes seismic amplitude, phase, frequency etc. Zero-phase wavelet has high signalto-noise ratio, high resolution and the characteristic of symmetry. But in the case of thin layer, the zero-phase reflection waves from top and bottom will interfere with each other and its symmetry is disappeared. The peak (trough) will no longer correspond to the interface. In recent years, some scholars proposed 90 degree phase rotation technology. It is considered that the main lobe of the reflection wave will correspond to the center of thin layer and the symmetry of reflection wave will be restored as well by rotating the wavelet with 90 degrees. However some scholars believe that doing a 90 degree phase rotation to the seismic data will distort seismic wavelet, and the seismic amplitude will no longer have relationship with lithology. This paper designed forward models based on the actual parameters and verified the Effectiveness of 90 degree phase rotation technology in the identification of thin layer.