Tool for use in well monitoring

摘要

A system for matching the hydrocarbon reservoir inflow with the outflow of an artificial lift system utilizes an apparatus which makes real time fluid level determinations and inputs the observed fluid levels into a processor which controls the speed of a motor which operates a subsurface pump, so as to increase hydrocarbon production. The apparatus which makes real time fluid determinations is installed such that a gas emission port and a pressure wave receiving port are placed within the tubing-casing annulus.

主权项

1. A system for producing fluids from a well, the well comprising a wellhead, a string of casing and a string of tubing concentrically disposed within the casing wherein an annulus is defined between an outside wall of the tubing and an inside wall of the casing, the system comprising:
a fluid level determination device, said device comprising a gas emission tubing having an outlet inserted into the annulus through which outlet a charge of compressed gas is released, a pressure wave receiving tube having an inlet inserted into the annulus through which inlet a pressure wave is detected, a pressure wave measurement device attached to the pressure wave receiving tube, said pressure wave measurement device producing an output signal upon detection of a pressure wave, and processing means which, upon receipt of the output signal, determines the depth to fluid in the annulus wherein the gas emission tubing and the pressure wave receiving tube and the pressure wave receiving tube are substantially disposed within a carrier tray; a subsurface pump in the well for producing the fluids; an electrical motor which operates the subsurface pump; and means for controlling the rotational speed of the electrical motor, said means for controlling the rotational speed of the motor adjustable according to the determined depth to fluid in the annulus.