Frequency Analyzing Based Hydrocarbon Prospects Characterization of Palaeogene High Amplitude Seismic Anomalies in Bohai Oilfield

• DOI: 10.3997/2214-4609.202012056
• Publication Date: 2021-01-15T16:16:53Z
• Authors: X. Xie; K. Wu; Y. Wang; Y. Liu; X. Sun
• Keywords: Paleogene

Summary High amplitude seismic anomalies are found to be commonly distributed within Paleogene strata in Liaodong Depression, Bohai Oilfield, which may associated with the presence of hydrocarbon. In this paper, we have attempted reveal formation mechanism and then characterize hydrocarbon prospects as well spatial distribution such bright spots. The research starts by rock physics analyzing drilled wells forward modeling, shows that gas sand relatively low impedance gravel high both manifest strong reflections. However, spectrum analysis demonstrates differences between them dominant frequency bandwidth, result is further confirmed spectral decomposition. hydrocarbon-associated therefore distinguished from those "false spots" caused other geologic factors through low-pass filtering based peak energy sum, followed attenuation gradient (FAG) for more accurate favorable areas risk mitigation.