What is it about?
The Campos Basin is the best known and most productive of the Brazilian coastal basins. Turbidites are, by far, the main oil-bearing reservoirs. Using a four component (4-C) ocean-bottom-cable (OBC) seismic survey we set out to improve the reservoir characterization in a deep-water turbidite field in the Campos Basin. In order to achieve our goal, pre-stack angle gathers were derived and PP and PS inversion were performed. The inversion was used as an input to predict the petrophysical properties of the reservoir. Converting seismic reflection amplitudes into impedance profiles not only maximizes vertical resolution but also minimizes tuning effects.
Featured Image
Why is it important?
Results from OBC PP and PS seismic data boost the reservoir's interpretation and add a porosity volume that increases the undestanding of the área. Pre-Stack Inversion and goos sesimic data was essential to got a good reservoir interpretation.
Perspectives
Mapping the porosity is extremely important in the development of a hydrocarbon reservoirs. Combining seismic attributes derived from the P-P data and porosity logs we use linear multi-regression and neural network geostatistical tools to predict porosity between the seismic attributes and porosity logs at the well locations. After predicting porosity in well locations, those relationships were applied to the seismic attributes to generate a 3-D porosity volume. The predicted porosity volume highlighted the best reservoir facies in the reservoir. The integration of elastic impedance, shear impedance and porosity improved the reservoir characterization.
Luiz Martins
Colorado School of Mines
Read the Original
This page is a summary of: From ocean-bottom cable seismic to porosity volume: A prestack PP and PS analysis of a turbidite reservoir, deepwater Campos Basin, Brazil, Interpretation, May 2014, Society of Exploration Geophysicists,
DOI: 10.1190/int-2013-0150.1.
You can read the full text:
Contributors
The following have contributed to this page
