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Low-frequency shadow detection on prestack zero-offset VSP data |
ZHANG Gu-lan1, CAI Zhi-dong1, YANG Lan-cheng2, LI Fei1, JIN Qi-hu1 |
1 Production Seismic Department,BGP Inc.,CNPC,Zhuozhou,Hebei 072751,China;
2 Acquisition Technique Support Department,BGP Inc.,Zhuozhou,Hebei 072751,China |
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Abstract Using generalized S-transformation this work analyzes low frequency shadow on zero-offset VSP pre-stack data.With VSP geometry that directly receives up-going and down-going waves near target layers,this analysis quality will be improved.We also give low-frequency shadow attribute analysis process and corresponding processing method in the article.The field data examples show that our low frequency shadow detection method can indicate the existence of oil and gas.
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Received: 25 November 2009
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