High resolution distributed temperature sensing for downhole monitoring
US10316643B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2013 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | Apr 22, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/135
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method, system and computer-readable medium for obtaining a temperature profile of a wellbore is disclosed. Raw temperature data are obtained from the wellbore using a distributed temperature sensing system. The raw temperature data includes noise. A numerical decomposition is performed on the raw temperature data within a dynamic window in a measurement space of the raw temperature data to obtain decomposition terms of order of first order and higher. An adaptive filter is applied to the decomposition terms of first order and higher within the dynamic window to reduce noise from the decomposition terms of first order and higher. The filtered decomposition terms of first order and higher are used to obtain a temperature profile of the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.