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- Title
Importance of Gas Hydrates for India and Characterization of Methane Gas Dissociation in the Krishna-Godavari Basin Reservoir.
- Authors
Vedachalam, Narayanaswamy; Ramesh, Sethuraman; Umapathy, Arunachalam; Ramadass, Gidugu Ananda
- Abstract
Natural gas hydrates are considered to be a strategic unconventional hydrocarbon resource in the Indian energy sector, and thermal stimulation is considered as one of the methods for producing methane from gas hydrate-bearing sediments. This paper discusses the importance of this abundantly available blue economic resource and analyzes the efficiency of methane gas production by circulating hot water in a horizontal well in the fine-grained, clay-rich natural gas hydrate reservoir in the Krishna-Godavari basin of India. Analysis is done using the electrothermal finite element analysis software MagNet-ThermNet and gas hydrate reservoir modeling software TOUGH+HYDRATE with reservoir petrophysical properties as inputs. Energy balance studies indicate that, in the 90% hydrate-saturated reservoir, the theoretical energy conversion ratio is 1:4.9, and for saturations below 20%, the ratio is <1. It is identified that a water flow of 0.2 m3/h at 270°C is required for every 1 m2 of wellhead surface area to dissociate gas hydrates up to a distance of 2.6 m from the well bore within 36 h.
- Subjects
INDIA; GAS hydrates; METHANE; DISSOCIATION (Chemistry); HYDROCARBONS; ENERGY industries
- Publication
Marine Technology Society Journal, 2016, Vol 50, Issue 6, p40
- ISSN
0025-3324
- Publication type
Article
- DOI
10.4031/MTSJ.50.6.1