Ternary water control and gas recovery method suitable for unconsolidated siltstone gas reservoir
US11485897B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2022 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Mar 18, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/086
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A ternary water control and gas recovery method suitable for an unconsolidated siltstone gas reservoir is provided. It includes the following steps: first, running a silt control screen pipe manufactured by an interface hydrophobic modification into a wellbore to realize wellbore water control and silt control; second, filling a surface hydrophobic modified gravel in an annular space between the silt control screen pipe and the wellbore to form a hydrophobic gravel packing layer for water control and silt control; third, injecting a wetting agent aqueous solution into a stratum, and performing a hydrophobic modification on a gas reservoir seepage channel surface to realize in-situ waterblocking and silt migration of the unconsolidated siltstone gas reservoir, and then closing a well for a preset time before exploitation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.