Methods and apparatus for determining downhole fluid parameters
AssigneeSchlumberger Technology Corporation
InventorsTullio Moscato, Elena Borisova
Life of this patent
Estimating the term…
Abstract
Example methods and apparatus to determine downhole fluid parameters are disclosed herein. An example method includes determining a velocity of a portion of a downhole tool moving in a well and determining a response of a fluid sensor disposed on the portion of the downhole tool. The fluid sensor includes a resistance temperature detector at least partially immersed in a fluid in the well. The example method further includes determining a velocity of the fluid based the velocity of the portion of the downhole tool and the response of the fluid sensor.
Claims19
A method, comprising:
- disposing a downhole tool in a well;
- determining a velocity of a portion of the downhole tool utilizing velocity sensors on the downhole tool;
- determining a response of a fluid sensor disposed on the portion of the downhole tool and immersed in a fluid, the fluid sensor including a resistance temperature detector (RTD), wherein the RTD is utilized as a heater and a temperature sensor in thermal contact with the fluid and flush with an outer surface of the downhole tool;
- and
- determining a velocity of the fluid based on the determined velocity of the portion of the downhole tool and the determined response of the fluid sensor.
A method, comprising:
- disposing a downhole tool in a well via a coiled tubing;
- determining a velocity of a portion of the downhole tool with velocity sensors disposed on the downhole tool;
- via a fluid sensor disposed on the downhole tool, determining a direction of fluid flow in a well relative to the portion of the downhole tool moving in the well, the fluid sensor capable of sensing fluid flow of about five millimeters per second or greater and in thermal contact with the fluid flow and flush with an outer surface of the downhole tool and in contact with the fluid;
- and
- determining a velocity of the fluid based on the direction of the fluid flow relative the portion of the downhole tool.
A method, comprising:
- disposing a downhole tool in a well via a coiled tubing, the downhole tool comprising at least one fluid sensor, the at least one fluid sensor disposed flush with an outer surface of the tool and in thermal contact with a fluid mixture in the well;
- determining a direction of flow of the fluid mixture in a fluid flow passageway of the well;
- moving the coiled tubing and the fluid sensor disposed in the fluid mixture based on the direction of the flow of the fluid mixture;
- determining a velocity of the fluid sensor utilizing a velocity sensor on the tool;
- determining a direction of flow of the fluid mixture relative to the fluid sensor;
- and
- determining a velocity of the fluid mixture based on the direction of the flow of the fluid mixture relative to the fluid sensor and the velocity of the fluid sensor.
Dependencies are inferred from the claim text.