Devices, systems, and methods for estimating flow rates in a plunger lift system
AssigneeSchlumberger Technology Corporation
InventorsKaustubh Shrivastava, Agustin Gambaretto, Jason Baihly
Life of this patent
Estimating the term…
Abstract
A plunger lift management system may measure a casing pressure data series of an annular space between a casing and a tubing. A plunger lift management system may measure a tubing pressure data series of the tubing. A plunger lift management system may generate a pressure differential data series based on the casing pressure data series and the tubing pressure data series. A plunger lift management system may, based on the pressure differential data series, a weight of a plunger, and a length of the tubing, identifying a weight of liquid lifted by the plunger.
Claims20
A method for operating a plunger lift system in a well, the method comprising:
- measuring a casing pressure data series of an annular space between a casing and a tubing;
- measuring a tubing pressure data series of the tubing;
- generating a pressure differential data series based on the casing pressure data series and the tubing pressure data series;
- and
- based on the pressure differential data series, a weight of a plunger, and a length of the tubing, identifying a weight of liquid lifted by the plunger.
A method for operating an artificial lift system in a well, the method comprising:
- receiving pressure data over time;
- applying a flow rate model to the pressure data, the flow rate model outputting a mass of fluid produced over the time based on the pressure data, a mass of a plunger, and a length of a tubing;
- and
- applying a machine learning model to the pressure data, the mass of the plunger, and the length of the tubing, the machine learning model outputting an adjustment to one or more parameters of the flow rate model.
A plunger lift management system, comprising:
- a plunger having a plunger weight;
- a casing pressure sensor;
- a tubing pressure sensor;
- and
- a processor and memory, the memory including instructions that cause the processor to:
- measure, using the casing pressure sensor, a casing pressure data series of an annular space between a casing and a tubing;
- measure, using the tubing pressure sensor, a tubing pressure data series of the tubing;
- generating a pressure differential data series based on the casing pressure data series and the tubing pressure data series;
- and
- apply a flow rate model to the pressure differential data series, the plunger weight of the plunger, and a length of the tubing, the flow rate model outputting a weight of liquid lifted by the plunger.
Dependencies are inferred from the claim text.