井间地震纵横波分离方法研究及应用

doi:10.3969/j.issn.1673-8926.2013.05.017

Lithologic Reservoirs ›› 2013, Vol. 25 ›› Issue (5): 94-99.doi: 10.3969/j.issn.1673-8926.2013.05.017

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Study on P and S wave separation method in cross-well seismic and its application

FENG Yuping¹， DIAO Rui²， XU Weixiu¹， YANG Jing¹， SONG Jianguo³

1. Shengli Branch Company， Geophysical Corporation， Sinopec Oilfield Service Corporation， Dongying 257086， China；2. Geophysics Research Institute of Shengli Oilfield Branch Company， Sinopec， Dongying 257000， China；3. School of Geophysics， China University of Petroleum， Qingdao 266555， China

Online:2013-09-26 Published:2013-09-26

Abstract

Abstract:

Three-component seismic acquisition technology used in VSP and cross-well seismic can record wealthy seismic wave field. The P and S wave couple together, which becomes the difficulty and emphasis of data processing. Through analyzing borehole seismic acquisition system, combined with polarity relation of P and S wave in different components, we can associate polarity of P and S wave with apparent velocity and direction of seismic wave reaching the geophone array. According to this relation, we obtained the distribution relation of P and S wave in τ- p domain based on the linear Radon transform （LRT）. Considering the convergence of LRT, we designed a polarization filteringmethod using the high-resolution Radon transform, and then accomplished the separation of P and S wave. The processing of
simulated data of theoretical model and practical cross-well model separated P and S wave field successfully, which is useful for independent imaging of P and Swave.

Key words: tight sandstone, reservoir characteristics, diagenesis, Chang₄₊₅ oil reservoir set, Ordos Basin

FENG Yuping， DIAO Rui， XU Weixiu， YANG Jing， SONG Jianguo. Study on P and S wave separation method in cross-well seismic and its application[J].Lithologic Reservoirs, 2013, 25(5): 94-99.

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