图书馆订购 Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

NUMERICAL SIMULATION FOR GAS HYDRATE IN DIFFERENT SPATIAL DISTRIBUTION ON GAS PRODUCTION BY DEPRESSURIZATION

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpf.023108
pages 6761-6768

摘要

The large amounts of gas hydrate reserves suggest the potential of gas hydrates as a new energy resource if economically viable production methods were developed. Most hydrate accumulations especially marine deposits explored in the global are classified to different reservoir types. The saturations and spatial distributions of hydrates in pore space mainly affect physical properties of hydrate-bearing sediments like the thermal properties and fluid migration about permeability. In this paper, the potential impact of hydrate saturation in spatial distribution on gas production from hydrate-bearing sediments in laboratory-scale was predicted from a previously developed and verified two-dimensional axisymmetric model. The results show that gas hydrate dissociated spatially at the early depressurization stage. Hydrate saturation distribution in different direction would affect the temperature and pressure propagation, and then influenced the gas production. Furthermore, according to hydrate reservoir anisotropy of permeability caused by the different hydrate saturation distribution in the vertical and horizontal direction, the arrangement of mining well direction should be consistent with the direction of uneven distribution of hydrate.