1887

Abstract

Summary

The drilling of fractured-vuggy reservoirs (FVRs) along the main strike-slip faults in the ultra-deep Ordovician carbonates has made great success in Tarim basin. Strong beaded reflection is the prominent seismic characteristics of this kind of reservoir. The amplitude difference attributes are often used to predict the beadlike seismic anomaly. However, traditional seismic attributes do not take the topographic relief into consideration. When comes to the strong beaded reflections among the pull-apart and push-up structure of the strike-slip faults, these seismic attributes fall shorts and lead to the incorrect FVRs position. To make up this deficiency, we develop the strata information guided amplitude difference attributes. To achieve this, the strata information is introduced by the relative geologic time (RGT), hence, the local seismic events involved in the amplitude difference attributes calculation are flattened by the RGT model and RGT based cross-correlation. Then, the flattened seismic traces are used as input of the central finite difference scheme to calculate the amplitude gradient attributes. Further, the comprehensive geologic model that consider the FVRs among the push-apart structure of the strike-slip fault is established to verify the effectiveness of the proposed method. The real data application also demonstrates the superiority of the proposed method.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.2025101259
2025-06-02
2026-02-09

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References

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/content/papers/10.3997/2214-4609.2025101259
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Relative Geologic Time guided Amplitude Gradient Attributes for the Ultra-Deep Carbonate Fault-Controlled Reservoir Identification
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.2025101259
/content/papers/10.3997/2214-4609.2025101259
/content/papers/10.3997/2214-4609.2025101259
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