| Qingdao Institute of marine geology, China Geological Survey | Host |
| Citation: |
QIAO Zhu, XIE Xiang, CHUAI Yuanyuan, WU Jingchao, ZHANG Delong. APPLICATION OF SPECTRAL SHAPING-BIDIRECTIONAL FILTERING UNITED TECHNIQUE TO IDENTIFICATION OF SMALL AND MICRO FAULTS[J]. Marine Geology Frontiers, 2021, 37(12): 83-87. doi: 10.16028/j.1009-2722.2020.140
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APPLICATION OF SPECTRAL SHAPING-BIDIRECTIONAL FILTERING UNITED TECHNIQUE TO IDENTIFICATION OF SMALL AND MICRO FAULTS
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Abstract
The exploration practice of Bohai Oilfield suggests that the recognition and identification of micro-faults are critical to tectonic interpretation and discovery of large traps. The study area of this paper is located in a superimposed zone of multi-directional faults, and the quality of seismic data is rather poor, and especially the micro-fractures and the axis in-phase faults are not so clear. To solve this problem, we firstly used the rematch spectrum shaping and frequency extension technology to improve the resolution of small micro-breaks, and then used the adaptive bidirectional filtering to improve the accuracy of micro-fracture imaging. Finally, the new coherent slices are used to re-implement the structural trap, and as the result, the areas of traps are greatly increased. Drilling verification suggests that the new approach is effective for oil and gas discoveries.
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References
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QIAO Zhu, XIE Xiang, CHUAI Yuanyuan, WU Jingchao, ZHANG Delong. APPLICATION OF SPECTRAL SHAPING-BIDIRECTIONAL FILTERING UNITED TECHNIQUE TO IDENTIFICATION OF SMALL AND MICRO FAULTS[J]. Marine Geology Frontiers, 2021, 37(12): 83-87. doi: 10.16028/j.1009-2722.2020.140
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Figure 1.
Comparative profiles before (left) and after (right) seismic data processing
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Figure 2.
Flow chart of adaptive bidirectional filtering
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Figure 3.
Comparison of complex fault zone before (left) and after (right) filtering
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Figure 4.
Comparison of local new (left) and old (right) coherent slices
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Figure 5.
Comparison of the new (left) and old (right) images of the T0 horizon in the southern part of the work area
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Figure 6.
Comparison of new (left) and old (right) variance slices
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Figure 7.
Comparison of new (left) and old (right) T02 horizons
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Figure 8.
Well stratigraphic column and oil-bearing area map