Extrapolating the OBS Data Using the Kirchhoff Integral Method

Geoscience ›› 2012, Vol. 26 ›› Issue (6): 1231-1236.

• Energy Exploration • Previous Articles Next Articles

Extrapolating the OBS Data Using the Kirchhoff Integral Method

WANG Xiang chun¹, WANG Yan feng², XIA Chang liang ³, LIU Xue wei¹

1 Key Laboratory of Geodetection (China University of Geosciences, Beijing), Ministry of Education, Beijing100083, China;
2 Changqing Business Division, CNPC Logging, Xi'an, Shaanxi710201,China;
3 Geophysical Research Institute, BGP, CNPC, Zhuozhou, Hebei072750, China

Received:2012-06-02 Revised:2012-08-16 Online:2012-10-24 Published:2012-10-31

Abstract

Abstract:

When the OBS (ocean bottom seismograph) technique is used to explore the Earth, the shots are on the sea surface and the receivers are on the sea floor, so the OBS data can't be processed in the conventional seismic data processing method. In order to solve this problem, the shots and OBS need correcting into the same surface. Here the Kirchhoff integration method is carried out to extrapolate the shots onto the sea bottom surface where the OBS lies on and ideal results are achieved. The Kirchhoff extrapolation processing used here causes little negative influence on the resolution and wave field's signal/noise ratio. In addition, more accurate velocity field is achieved by velocity analysis to the extrapolated data than to the static shift corrected data, and this is very important to the consecutive data processing such as NMO (normal moveout), stack and so on.

Key words: ocean bottom seismograph, static shift correction, Kirchhoff integration method

WANG Xiang-Chun, WANG Yan-Feng, JIA Chang-Liang, LIU Hua-Wei. Extrapolating the OBS Data Using the Kirchhoff Integral Method[J]. Geoscience, 2012, 26(6): 1231-1236.

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Extrapolating the OBS Data Using the Kirchhoff Integral Method

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