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Customization of Preconditioning and Inversion processes for broadband data. A case study from the Campos Basin, Brasil.

EAGE workshop/forum/local conference, May, 2016
Ekaterina Kneller
©2016 EAGE

The use of broadband data in reservoir characterization has proven advantages. However, the whole workflow should be reviewed and renewed in order to get all the advantages of broadband data.

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Quantitative Interpretation - Broadband Data Uplift

EAGE workshop/forum/local conference, May, 2016
Loic Michel | Ronan Sablon
©2016 EAGE

Using pre-stack model-based inversion we will analyze the impact of marine seismic acquisition and processing on our ability to predict elastic parameters.

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Porosity prediction using cokriging with multiple secondary datassets

CSEG - Canadian Society of Exploration Geophysicists, March, 2016
Kiki Hong Xu | Brian Russell
©2016 CSEG

The prediction of porosity is essential for the identification of productive hydrocarbon reservoirs in oil and gas exploration. Numerous useful technologies have been developed for porosity prediction in the subsurface, such as multiple attribute analysis, kriging, and cokriging. Kriging allows us to create spatial maps from point information such as well log measurements of porosity. Cokriging combines well log measurements of porosity with seismic attributes recorded between the wells to improve the estimation accuracy of the overall map. However, the traditional cokriging for porosity estimation is limited to only one seismic attribute. To introduce more geological information and improve the accuracy of prediction, we develop a new cokriging system that extends traditional cokriging to two secondary variables. In this study, our new cokriging system is applied to the Blackfoot seismic data from Alberta, and the final estimated map is shown to be an improvement over kriging and traditional single attribute cokriging. To show this improvement, "leave-one-out" cross-validation is employed to evaluate the accuracy of porosity prediction with kriging, traditional cokriging, and our new approach. Compared to kriging and traditional cokriging, an improved porosity map, with higher lateral geological resolution and smaller variance of estimation error, was achieved using the new cokriging system. We believe that the new approach can be considered for porosity prediction in any area of sparse well control.

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Nearfield hydrophone driven 3D source designature and deghosting for multi-level source data

EAGE workshop/forum/local conference, November, 2015
Gordon Poole | Ping Wang | Yuan Ni | Zhan Fu | Risto Siliqi
©2015 EAGE

Combined with recent receiver deghosting strategies, the use of multi-level sources can provide further uplift to the ever broadening bandwidth of seismic data. While multi-level sources help mitigate source notches in the output spectrum, the resulting emitted wavelet still exhibits residual ghosts, directivity, and bubble energy which must be handled in processing. We highlight the compatibility of Ziolkowski’s notional source method with multi-level source acquisition. We continue by showing how the directional signatures may be used for 3D directional designature and deghosting on shallow water towed streamer data. The results show a significant improvement in the level of ringing relating to source wavelet directivity effects.

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Nearfield hydrophone driven 3D source designature and deghosting for multi-level source data

EAGE workshop/forum/local conference, November, 2015
Gordon Poole | Ping Wang | Yuan Ni | Zhan Fu | Risto Siliqi
©2015 EAGE

Combined with recent receiver deghosting strategies, the use of multi-level sources can provide further uplift to the ever broadening bandwidth of seismic data. While multi-level sources help mitigate source notches in the output spectrum, the resulting emitted wavelet still exhibits residual ghosts, directivity, and bubble energy which must be handled in processing. We highlight the compatibility of Ziolkowski’s notional source method with multi-level source acquisition. We continue by showing how the directional signatures may be used for 3D directional designature and deghosting on shallow water towed streamer data. The results show a significant improvement in the level of ringing relating to source wavelet directivity effects.

 Download (PDF, 1.2MB)