Method and system for detection of objects in a well reflecting hydraulic signal
US11035223B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 1, 2016 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Sep 28, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/1234
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The proposed method relates to hydrocarbon production, particularly to the monitoring of well operations by way of data analysis based on the cepstral analysis of the well pressure data recorded at the wellhead. The method assumes the detection of a hydraulic signal-reflecting object in the well, wherein: a fluid-filled well is provided with fluid enabling propagation of a hydraulic signal; a hydraulic signal source is provided, said source being in fluid communication with the well and designed to generate a hydraulic signal; a pressure sensor is provided, said pressure sensor records the hydraulic signal and being in fluid communication with the well and at least one hydraulic signal source. The hydraulic signal is recorded with the pressure sensor during well operations, and a pressure cepstrogram is obtained and an intense signal is found on the pressure cepstrogram. Then the position of object reflecting the hydraulic signal is detected in the well. A system is proposed for constructing a pressure cepstrogram and detecting a downhole object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.