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3D seismic data splicing and its application to shallow sand bodies in the Bohai oilfield |
LUO Teng-Teng( ), DUAN Xin-Yi, ZHANG Jin-Hui, MA Zhen |
Tianjin Branch of CNOOC(China) Limited,Tianjin 300459, China |
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Abstract Conventional splicing methods aim to serve structural interpretation and align the reflection energy and frequency of large strata based on seismic data themselves.They adopt seismic data only from one study area in processing data of overlap zones,failing to fully utilize the effective information in seismic data of all study areas.Consequently,the resulting low-fidelity seismic data in overlap zones severely affect subsequent discrimination of reservoir connectivity and hydrocarbon-bearing properties.This study proposed a weighted fusion-based data spicing method for overlap zones,where seismic data from different study areas are fused with corresponding weights to generate a trace of seismic data.The application of the proposed method to actual seismic data shows that the processing results based on the fusion and splicing of data in overlap zones can effectively improve the quality of seismic data,with high continuity of seismic events on the profile, contributing significantly to the discrimination of the connectivity of shallow sand bodies.
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Received: 09 December 2024
Published: 22 April 2025
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Schematic diagram of splicing work area
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区块名 | A | B | 采集方式 | 拖缆 | Swath | 震源容量/(cu·in) | 2250 | 5090 | 电缆长度/m | 3600 | 16500 | 覆盖次数/次 | 36 | 1200 |
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Comparison of main collection parameters of data in splicing work area
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Schematic of three different selection schemes for overlapping areas
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Comparison of spliced sections before(a) and after(b) amplitude matching
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Comparison of spliced profiles before(a) and after(b) matched filtering
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Frequency characteristics of seismic data in spliced work area
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This method compares the sections before(a) and after(b) seismic data splicing in the fusion area
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Comparison of stacked profiles corresponding to three splicing schemes a—only apply data from Block A;b—only apply data from Block B;c—application of two Block fusion data
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Spectrum comparison of three splicing schemes
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Comparison of signal-to-noise ratio of three splicing schemes
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Attribute map of minimum amplitude values of a sand body in Bohai Sea a—only apply data from Block A;b—only apply data from Block B;c—application of two Block fusion data
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Comparison of three sets of data connected wells a—only apply data from Block A;b—only apply data from Block B;c—application of two Block Fusion data
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