Influence of fracture orientation distribution function on the estimates of gas-hydrate saturation of site 10 at Krishna-Godavari Basin, India

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Published: 2016-02-10
DOI: https://doi.org/10.4401/ag-6844
Keywords:
Gas hydrate saturation, Effective medium modeling, Krishna-Godavari Basin, Fracture orientation distribution

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Yudhvir Singh
Indian Institute of Technology Madras, Department of Ocean Engineering, Chennai,
Rajesh R. Nair
Indian Institute of Technology Madras, Department of Ocean Engineering, Chennai,

Abstract

We estimate the gas-hydrate saturation in fractured reservoirs of gas hydrate-rich marine sediments from Krishna-Godavari basin along the eastern margin of India. Effective medium modeling (EMM) is a combination of self-consistent approximation (SCA), differential effective medium (DEM) modeling and smoothing and it deals with the anisotropy associated with clay platelets’ orientation. It proves to be a good choice attributable to its dependency on physical parameters alone. Previous approaches appertain to the implementation of orientation distribution function (ODF) on clay platelets alone assuming a vertical ellipsoidal shape of gas hydrates whilst in the present study, we have implemented ODF on hydrate bearing fractures assigning an ellipsoidal shape to them as well. A bias of ~2-4% in the saturation estimates apparently streamlines the betterness of our method.

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Vol. 58 (2015): Fast Track 3

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Letters

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How to Cite

(1)
Singh, Y.; Nair, R. R. Influence of Fracture Orientation Distribution Function on the Estimates of Gas-Hydrate Saturation of Site 10 at Krishna-Godavari Basin, India. Ann. Geophys. 2016, 58. https://doi.org/10.4401/ag-6844.

References