Method for enhancing gas recovery of natural gas hydrate reservoir
US10830019B1 · kind B1 · utility
0Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2019 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Oct 14, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for improving the gas recovery of a natural gas hydrate reservoir by using artificial impermeable layers is described. Artificial impermeable layers are formed by injecting cement slurry into the permeable overburden and underburden layers. When depressurization exploitation is performed, a large amount of seawater can be effectively blocked from entering a hydrate layer, and a production pressure difference between the hydrate layer and the production well is effectively increased, so that a hydrate decomposition rate and the gas recovery are improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.