Plunger lift state estimation and optimization using acoustic data
US10883491B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2016 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Mar 10, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2200/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of probabilistically estimating a velocity of a plunger of a beam pump may comprise continuously monitoring well acoustics using a plurality of passive acoustic sensors attached to external structures of the beam pump; digitizing outputs of the plurality of passive acoustic sensors and sending the digitized outputs to a computing device for storage and processing; and using the digitized outputs of the plurality of passive acoustic sensors, estimating a probability of the velocity of the plunger using a hidden Markov model (HMM) to represent a probability of a position and the probability of the velocity of the plunger, the HMM comprising a state space model and an observational model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.