Estimation of seismic wave energy attenuation gradient based on Pseudo-Margenau-Hill distribution

LI Shengjun; LIU Weifang; GAO Jianhu

doi:10.3969/j.issn.1673-8926.2011.06.020

Lithologic Reservoirs >

2011 , Vol. 23 >Issue 6: 106 - 110

DOI: https://doi.org/10.3969/j.issn.1673-8926.2011.06.020

Estimation of seismic wave energy attenuation gradient based on Pseudo-Margenau-Hill distribution

LI Shengjun ,
LIU Weifang ,
GAO Jianhu

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1. Southwest Petroleum University， Chengdu 610500， China； 2. Research Institute of BGP， CNPC， Zhuozhou 072751， China

Online published: 2011-12-20

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Abstract

It is stated that the propagation of seismic wave in oil & gas reservoirs is accompanied by intense energy attenuation, and the frequency component is higher, the energywill be absorbed more. Thus energy attenuation gradient can be used to detect hydrocarbon sensitively. Conventional Fourier transformsuffers fromtime-frequency resolution problems, while Pseudo-Margenau-Hill distribution has many favorable properties, such as time-frequency marginal distribution, “weak” finite support, time-frequency location, which is one ofCohen class time-frequency distribution. The time-frequency analysis based on Pseudo-Margenau-Hill distribution is presented for energy attenuation gradient estimation, and the log of energy and frequency of higher band is used to calculate the energy attenuation gradient. The practical application shows the effectiveness of the method in hydrocarbon reservoir prediction.

Key words： carbonate cave; forwardmodeling; cavewidth; cave height

Cite this article

LI Shengjun , LIU Weifang , GAO Jianhu . Estimation of seismic wave energy attenuation gradient based on Pseudo-Margenau-Hill distribution[J]. Lithologic Reservoirs, 2011 , 23(6) : 106 -110 . DOI: 10.3969/j.issn.1673-8926.2011.06.020

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