Method and system for autonomous flow rate control in hydraulic stimulation operations
US11680469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2021 |
| Grant date | Jun 20, 2023 |
| Priority date | — |
| Expiry date | Jun 4, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method may include determining time-derivative pressure data based on pressure data regarding a pump system that is performing a hydraulic stimulation operation in a geological region. The method may further include determining a moving average value based on the time-derivative pressure data and a predetermined time window. The method may further include determining a flow rate adjustment for the pump system based on the moving average value, an update interval for adjusting flow rates, and a predetermined flow rate rule. A size of the predetermined time window may be different from the update interval. The method may further include using smoothed pressure data to determine time-derivative pressure data. The method may further include determining a flow rate adjustment for the pump system based on the time-derivative pressure data derived from the smoothed pressure data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.