Method for evaluating and preventing creep damage to conductivity of hydraulic fracture in gas reservoirs
US11280172B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2021 |
| Grant date | Mar 22, 2022 |
| Priority date | — |
| Expiry date | Oct 29, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0218
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses a method for evaluating and preventing creep damage to conductivity of hydraulic fracture in gas reservoirs, comprising: (1) selecting a rock sample of target reservoir for creep experiment, and plotting ε-t curve of the rock sample during creep; (2) fitting the fractional Kelvin model with the ε-t curve of the rock sample during creep; (3) calculating the conductivity and permeability of hydraulic fracture considering creep damage; (4) numerically solving the productivity model, calculating the cumulative gas production of the gas well produced up to time t, and calculating the creep damage rate for cumulative production of the gas well; (5) repeating Steps (3) to (4), calculating the creep damage rate for cumulative production for the cases of hydraulic fracture sanding concentration N of 5 kg/m2, 7.5 kg/m2, 10 kg/m2, 12.5 kg/m2 and 15 kg/m2 respectively, plotting the creep damage chart of cumulative production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.