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Numerical studies of depressurization-induced gas production from an interbedded marine turbidite gas hydrate reservoir model

Evgeniy Myshakin·Jeen-Shang Lin·Shun Uchida·Yongkoo Seol·Timothy S. Collett·Ray Boswell
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Abstract

The numerical simulation of thin hydrate-bearing sand layers interbedded with mud layers is investigated. In this model, the lowest hydrate layer occurs at the base of gas hydrate stability and overlies a thinly-interbedded saline aquifer. The predicted gas rates reach 6.25 MMscf/day (1.77 x 105 m3 /day) after 90 days of continuous depressurization with manageable water production. Development of horizontal dissociating interfaces between hydrate-bearing sand and mud layers is a primary determinant of reservoir performance. A set of simulations has been executed to assess uncertainty in in situ permeability and to determine the impact of the saline aquifer on productivity.

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Evgeniy Myshakin, Jeen-Shang Lin, Shun Uchida, Yongkoo Seol, Timothy S. Collett, Ray Boswell. 2017. Numerical studies of depressurization-induced gas production from an interbedded marine turbidite gas hydrate reservoir model. https://pubs.usgs.gov/publication/70189784

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