Unconventional plays represent huge sources of opportunity for oil and gas companies, and for the global economy. Within this distinctive class, established gas plays in fractured shale formations in North America (e.g. Bakken, Barnett and Haynesville) have achieved high visibility through the successful application of multiple fracture stimulations, borehole micro-imaging, micro-seismic data, geosteered horizontals, 3D sonic scanning, and new completion strategies. These successes can be carried over to emerging shale plays such as Eagle Ford, creating new opportunities for the oil and gas industry to improve recovery and mitigate the cost and risk associated with drilling activities.
While technology advances in these plays have largely focused on the wellbore, with amazing improvements in well completion procedures like fracking and directional drilling, seismic data can also play a significant role in characterizing these reservoirs as part of the field development process.
The Eagle Ford shale play is heterogeneous in property distribution and stress. This presentation will use a significant number of physical attributes (Spectral Decomposition, inversion impedance attributes [Lambda-Rho, Mu-Rho]), trace shape seismic facies classification, and AVA(Z) attributes computed over 360 degrees of azimuth, to provide a comprehensive description of the properties of this very thin and deep reservoir. Through the interpretation and analysis of these attributes, we gain insight into the Eagle Ford shale properties, thickness and heterogeneity for the identification of potential sweet spots.
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