A Tiny-Fault Detection Strategy Based on Phase Congruency—An Example of Carbonate Reservoir in Ordos Basin, China

Tiny-fault detection plays a very important role in the research on the tight oil and gas reservoir in well area X in Ordos Basin, China. In this study, the target formation is the Majiagou dolomite reservoir section under the Ordovician salt with low-amplitude structures generally developed. The co...

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Veröffentlicht in:Minerals (Basel) 2023-03, Vol.13 (3), p.306
Hauptverfasser: Wang, Enli, Li, Hailiang, He, Run, Zhao, Wanjin, Li, Lin, Xie, Chunhui, Yan, Guoliang, Chen, Qiyan, Yang, Qing
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container_issue 3
container_start_page 306
container_title Minerals (Basel)
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creator Wang, Enli
Li, Hailiang
He, Run
Zhao, Wanjin
Li, Lin
Xie, Chunhui
Yan, Guoliang
Chen, Qiyan
Yang, Qing
description Tiny-fault detection plays a very important role in the research on the tight oil and gas reservoir in well area X in Ordos Basin, China. In this study, the target formation is the Majiagou dolomite reservoir section under the Ordovician salt with low-amplitude structures generally developed. The conventional attributes extracted from migrated seismic data could not achieve ideal results in detecting hidden faults with small displacement due to slight travel time differences and weak amplitude disturbances. To address this challenge, a segment and fusion strategy was adopted to highlight tiny faults in this region. First, the phase congruency analysis method was used to extract the local edges of coherence to locate the faults. Second, in the extraction process, the coherence was divided into segments according to the fault scales, and then enhanced segment by segment and fused. Third, the empirical formula of the new fault indicator was constructed by the phase congruency features, which can be used to accurately characterize tiny faults. This strategy performs well in both model tests and the migrated seismic data.
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subjects Amplitude
Amplitudes
Analysis
Carbonates
Coherence
Detection
Dolomite
Dolostone
Empirical analysis
Fault detection
Fault lines
Fault location
Faults
Fractured reservoirs
Geological faults
Hydrocarbons
Oil reservoirs
Ordovician
Reservoirs
Segments
Seismic data
Travel time
title A Tiny-Fault Detection Strategy Based on Phase Congruency—An Example of Carbonate Reservoir in Ordos Basin, China
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