Evaluating factorial kriging for seismic attributes filtering: a geostatistical filter applied to reservoir characterization / Avaliação da krigagem fatorial na filtragem de atributos sismicos : um filtro geoestatistico aplicado a caracterização de reservatorios

AUTOR(ES)

Evaldo Cesario Mundim

DATA DE PUBLICAÇÃO

1999

RESUMO

In this dissertation the Factorial Kriging analysis for the filtering of seismic attributes applied to reservoir characterizatÍon is considered. Factorial Kriging works in the spatial domain in a similar way to the Spectral Analysis in the frequency domain. The incorporation of filtered attributes via External Drift Kriging and Collocated Cokriging in the estimate of reservoir characterization is discussed. Its relevance for the reservoir porous volume calculation is also evaluated based on comparative analysis of the volume risk curves derived from stochastic conditional simulations with collocated variable and stochastic conditional simulations with external drift. Results prove Factorial Kriging as an efficient technique for the filtering of seismic attributes images, of which geologic features are enhanced. The attribute filtering improves the correlation between the attributes and the well data and the estimates of the reservoir properties. The differences between the estimates obtained b External Drift Kriging and Collocated Cokriging are also reduced

ASSUNTO(S)

filtros digitais (matematica) analise espectral geologia - estatistica prospecção reservatorios

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