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Abstract

Summary

“A seismic dataset (AF3D) has been inverted for reservoir characterization of an unconventional shale oil play, onshore Argentina. The input are wide azimuth data with long offsets and a high fold stack. An anisotropic PreSDM workflow optimizes resolution and preserve the amplitudes. The following rock physical parameters are estimated for the Mesozoic Vaca Muerta Formation: P-impedance, S-impedance, density, TOC, thickness, maturation, hydrocarbons in place, permeability, porosity, brittleness, pore pressure, Poisson’s Ratio and Young’s modulus. Differentiation between brittle and ductile rocks represents a convenient method for outlining sweet spots. One estimated elastic parameters is Young’s modulus (E), which relates to brittleness. Low velocities correlate with high TOC, higher maturation level, shale content and also overpressures. Small micro cracks and fissures are related to tectonic stress regime or they are maturation driven. The amount of anisotropy in the Vaca Muerta deposits helps to get a better grip on the direction of these micro fractures. Possible sweet spots can be identified based on the mapped reservoir characteristics and estimated rock physical parameters. The seismically derived information allows to optimize the well orientation and spacing as well as and frac design, it has a clear impact on the recovery factor for the unconventional resources.”

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/content/papers/10.3997/2214-4609.201801021
2018-06-11
2024-04-23

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801021
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Seismic Inversion and Rock Physical Parameter Estimation for the Unconventional Vaca Muerta Shale Oil Play, NW Argentina
Conference Proceedings 2018, 1 (2018); https://doi.org/10.3997/2214-4609.201801021
/content/papers/10.3997/2214-4609.201801021
/content/papers/10.3997/2214-4609.201801021
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