Fault identification in the bedrock weathering crust by the spectral decomposition based on matching pursuit
Renjie He, W. Wang, Xiaolong Zheng, D. He, Weiguang Zhao, E. Wang, Sanhong Deng · 2021
Summary The pre-paleogene fractured granite reservoir in the prospect of Indonesia is strictly controlled by the development of faults. It’s ineffective to detect faults by the conventional techniques due to the reservoir featuring with deep depositing and complex fractures, which is distributed in the weathering crust of bed rock. For depicting the fault distribution of bedrock weathering crust, a workflow consisting of the matching pursuit based on Morlet wavelet and the spectral decomposition based on Wigner-Wille distribution is applied. Compared with the spectral slice along layer calculated by the traditional linear spectral decompositions, the result of the proposed approach shows the advantages of more effective short-time analysis and higher time-frequency resolution. This workflow provides a quite well identification of faults in various scales, especially small-scale faults and plays a good guiding role in the follow-up work in this work area, such as the detailed interpretation of faults and the search of fault-block traps.