| Qingdao Institute of marine geology, China Geological Survey | Host |
| Citation: |
GAO Shunli. Broadband and high-precision sesmic processing technology and its application on offshore deep lithology exploration[J]. Marine Geology Frontiers, 2024, 40(3): 75-83. doi: 10.16028/j.1009-2722.2023.039
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Broadband and high-precision sesmic processing technology and its application on offshore deep lithology exploration
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Abstract
Broadband and high-precision processing of offshore horizontal cable 3D data is receiving increasing attention in the exploration of lithological oil and gas reservoirs recently. However, specialized analysis and discussion are lacking. The broadband high-precision processing technology of 3D data of offshore horizontal cables was systematically summarized, and the procedures of broadband high-precision processing and key technologies of horizontal cables in shallow water area were established, including mainly the deghosting in horizontal cables, pre-stack integrated multi-domain denoising, shallow-water multi-wave combinational suppression, and target-based fine-velocity modeling and fine-migration imaging, etc. By applying real data on the western slope of Xihu Sag, the broadband, amplitude-preserving and high-precision seismic results with improved resolution were obtained. The reservoir inversion and geological evaluation carried out by the results are in good agreement with new drillings, from which the geological viewpoint obtained is more reasonable.
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References
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GAO Shunli. Broadband and high-precision sesmic processing technology and its application on offshore deep lithology exploration[J]. Marine Geology Frontiers, 2024, 40(3): 75-83. doi: 10.16028/j.1009-2722.2023.039
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Figure 1.
Schematic diagram of ghost wave path and spectrum characteristics of actual data
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Figure 2.
Original record and velocity spectrum
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Figure 3.
Processing flow of horizontal cable broadband high-precision seismology
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Figure 4.
Comparison of single shot and stack profile before and after suppression of swell noise
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Figure 5.
Multiple flow, superposition before and after suppression, autocorrelation and spectrum comparison
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Figure 6.
Ghost wave attenuation effect and spectrum comparison
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Figure 7.
Comparison of migration sections using conventional velocity modeling and fine velocity modeling
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Figure 8.
Inversion prediction results based on broadband and high-precision processing