Lithologic reservoir identification based on the improved Hilbert-Huang transform
Li Yan, Gu Hanming
Hubei Key Laboratory of Subsurface Multi-scale Imaging, Institute of Geophysics and Geomatics, China University of Geosciences (Wuhan), Wuhan, Hubei 430074, China
Abstract：We propose in the paper lithologic reservoir identification based on the improved Hilbert-Huang transform (HHT). Seismic instantaneous attributes obtained by the improved HHT reflect better seismic signal characteristics. In this paper, we first introduce the normalized processing to HHT, and its basic principles and decomposition; based on which, we calculate "three instantaneous" parameters of seismic signals. Then we analyze the instantaneous amplitudes reconstructed by HHT, the improved HHT, and original seismic signal respectively. The comparison of these three results shows that instantaneous amplitude reconstructed by the improved HHT is most sensitive to reservoirs. Finally we apply the improved HHT approach to field data in Chunguang Oilfield, and extract higher-resolution instantaneous amplitude attribute. This attribute delineates clearly lithologic reservoir boundaries which coincide with the drilling data and logging data. Therefore we believe that the proposed approach in this paper can more effectively describe lithologic reservoirs.
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