Induced earthquake evaluation method for hydraulic fracturing activated faults
US11970940B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 27, 2023 |
| Grant date | Apr 30, 2024 |
| Priority date | — |
| Expiry date | Sep 27, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An induced earthquake evaluation method for hydraulic fracturing activated faults includes obtaining an induced earthquake evaluation unit, cumulative injection equivalent energy, induced earthquake probability of fault type, induced earthquake probability of fault distance, hydraulic fracturing fluid diffusion capacity in fractured formation, new effective fault stress after fracturing, formation fluid pressure change rate and cumulative released equivalent energy. The probability of induced earthquake by hydraulic fracturing can be obtained. The induced earthquake possibility of each evaluation unit or single well under different stages of hydraulic fracturing, different construction injection methods and production conditions can be quantitatively evaluated. The method provides a quantitative result that can provide data support for optimizing hydraulic fracturing and reducing induced earthquake hazards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.