Device and method for measuring annular film thickness in wellbore where vortex drainage gas production tool is located

Abstract

The invention relates to a device and a method for measuring the thickness of the annular film in the wellbore where the eddy current drainage gas production tool is located, wherein the device for measuring the thickness of the annular film in the wellbore where the eddy current drainage gas production tool is located includes a multiphase flow device, an ultrasonic Doppler velocity measurement device, Eddy current tool, multiphase flow device including gas distribution pipeline, liquid distribution pipeline, guide rail, traveling hoisting mechanism, manual hoist, plexiglass tube measuring mechanism, electronic control device, computer, air compressor connected to the mixer through the gas distribution pipeline The water tank is connected to the mixer through the pump and the liquid distribution pipeline, and the mixer is respectively connected to the corresponding plexiglass tube through the pipeline, and the pipeline is equipped with an electric valve; one of the plexiglass tubes has a vortex tool, and the plexiglass tube is installed on the mobile support; Ultrasonic Doppler Velocimetry was used to measure annular film thickness and liquid phase velocity. The invention can measure the thickness of the annular film in the wellbore and the velocity of the liquid phase after passing through the eddy current tool under the conditions of different well inclination angles and different gas-liquid ratios.

Description

technical field [0001] The invention relates to a vortex tool drainage and gas recovery technology, in particular to a device and a method for measuring the thickness of an annular film in a wellbore where the vortex drainage and gas recovery tool is located. Background technique [0002] In the production process of gas wells, due to the sufficient supply of formation energy and high gas production in the initial stage of natural gas production; as the production progresses, the formation energy gradually decreases, resulting in a decrease in gas production, and the upward lifting force generated by the gas flow is insufficient, and the fluid accumulation in the gas well cannot follow The gas flow is carried out together and gradually accumulates at the bottom of the well, resulting in greater energy loss and further reduction in gas production. In the early stage of gas well water production, the energy supply is sufficient, and the gas volume can carry liquid accumulation...

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a device for measuring the thickness of the annular film in the wellbore where the eddy current drainage gas production tool is located. The swirling flow generated behind the tool and the measurement of the thickness of the annular film after stabilization have been a key problem that has not been solved. Another object of the present invention is to provide a device for measuring the thickness of the annular film in the wellbore where the vortex drainage and gas production tool is located for measurement experiments. Methods

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