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《Journal of Shandong University of Science and Technology(Natural Science)》 2010-01
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Preprocessing Methods with AVA Analysis of 3D VSP Data

QIAO Yu-lei(Geophysical Research Institute,Shengli Oilfield of SINOPEC,Dongying,Shandong 257000,China)  
There are lesser receiving noise and richer reflecting angle information in 3D VSP data compared with surface seismic data.The kinematical and dynamic features of reflected wave can be presented directly.The stratigraphic lithology and hydrocarbon bearing ability can be predicted by 3D VSP AVO/AVA analysis.The effective technical means were provided for exploring subtle reservoir.The data used to AVA analysis should be preprocessed strictly by amplitude preserve,surface consistent,angle gathering extracting,and so on for meeting the needs of AVA analysis.Fine preprocessing methods,such as full wave field amplitude compensation,two-step statistics wavelet deconvolution and conversion of straight raypath aprx angle gathering were used in the paper to remove various chief non-geologic factors which affected the amplitude and to ensure the AVA respond from angle gathering which was the true AVA respond from underground.The good processing results were obtained.
【Fund】: 国家高技术研究发展计划(“863”计划)重点项目“油藏综合地球物理技术”井中地球物理数据处理解释技术研究专题(2007AA060503)
【CateGory Index】: P631.4
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