Gas-liquid two-phase flow loop corrosion experimental device

Abstract

The invention relates to the field of oil and gas field corrosion research, in particular to a gas and liquid two-phase flow loop corrosion experiment device, which is applicable to coupon corrosion experiment and in-situ corrosion electrochemical test of gas and liquid two-phase flow of an oil and gas field production system on an oil pipe under the simulated working condition. An experiment testing module is arranged in a horizontal pipeline, and oil and gas field high-temperature and high-pressure fluid simulated by an experiment device is subjected to loop corrosion experiment by using an electrochemical workstation and a three-electrode electrochemical corrosion measuring device, so that flow accelerated corrosion weight loss and appearance features are obtained; an 'in-situ' electrochemical signal of a working electrode in simulated high-temperature and high-pressure fluid is monitored, so that the corrosion behavior and mechanism of the gas and liquid two-phase flow loop are mastered.

Description

technical field [0001] The invention belongs to the field of oil and gas field corrosion research, and in particular relates to a gas-liquid two-phase flow loop corrosion experiment device, which is suitable for coupon corrosion experiments and in-situ corrosion of gas-liquid two-phase flow on oil pipes in oil and gas field production systems under simulated working conditions Electrochemical testing. Background technique [0002] In the industrial production of oil and gas fields, the output of oil wells is mostly gas-liquid two-phase or even multi-phase mixture, which is collected and transported to oil gathering stations or combined processing stations through surface pipelines. Gas-liquid two-phase mixed transportation technology can be seen everywhere in oil and gas production. It has the advantages of simplifying the process, reducing infrastructure investment, and increasing oil and gas production. It is the most challenging and promising technology in the field of oi...

AI Technical Summary

Problems solved by technology

However, usually in the process of oil and gas mixed transportation, the gas phase medium of the reservoir often contains CO 2 、H 2 S and other gases or use CO in oil and gas development to enhance recovery 2 The CO carried out in the process of oil flooding technology 2 gas, which is severely corrosive after dissolving in the liquid phase; in addition, with the middle and late stages of oil recovery, CO 2 The content of water and water will gradually increase, which will also lead to the strengthening of the corrosiveness of the produced fluid

The corrosion law and mechanism of materials under simulated corrosion conditions are often different from those obtained from experiments at room temperature and pressure. In the past, when studying the corrosion behavior, characteristics and mechanism of gas-liquid two-phase flow or multi-phase flow, rotation The disc test device, the impingement jet test device, and the high-temperature and high-pressure reactor are used to complete the test, which is significantly different from the hydrodynamic properties of the gas-liquid two-phase flow in the actual oil and gas production process. The simulated working conditions are carried out, which affects the accuracy and practical reference value of the gas-liquid two-phase flow accelerated corrosion research data

Images