基于立体层析反演的低频模型构建在深水区储层反演中的应用:以南海深水W构造为例

doi:10.13278/j.cnki.jjuese.20170068

Abstract

Abstract: The establishment of an accurate low-frequency model is an important part of seismic impedance inversion, which directly affects the accuracy of the inversion results. However, the accuracy of the conventional model building method is significantly affected by the number of drilling wells, the more the number of wells, the higher the accuracy of the model. Due to the high cost of seismic exploration in deep-water, only a few drilling wells are available in this area; so it's difficult to establish an accurate low-frequency model as usual, especially when the deposition transverse features change largely, the accuracy of inversion result is impacted seriously. In this study, we introduced at first the basic theory of the three-dimensional tomographic velocity inversion and the calculation process of velocity inversion both in data and imaging domain, with taking the advantages of both data and imaging domain to get a high quality velocity model, then we constructed the low-frequency model for seismic inversion by combining with the velocity spectrum and well information, after this the accuracy and reliability of low-frequency model was improved effectively. We applied it to deep-water oil and gas exploration in bock W of South China Sea, and achieved the good results.

Key words: three-dimensional tomographic, low-frequency model, velocity spectrum, impedance, deep-water

CLC Number:

P631.4

Ye Yunfei, Sun Jianguo, Zhang Yiming, Xiong Kai. Construction of Low-Frequency Model with Three-Dimensional Tomographic Velocity Inversion and Application in Deep-Water Bock W of South China Sea[J].Journal of Jilin University(Earth Science Edition), 2018, 48(4): 1253-1259.

References

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Construction of Low-Frequency Model with Three-Dimensional Tomographic Velocity Inversion and Application in Deep-Water Bock W of South China Sea

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