In-situ load corrosion simulation loop system of high-temperature and high-pressure gas-liquid two-phase H2S/CO2 environment

Abstract

An in-situ load corrosion simulation loop system of a high-temperature and high-pressure gas-liquid two-phase H2S/CO2 environment comprises a control cabinet, a high-temperature high-pressure kettle, a turbofan, a gas flowmeter, a turbine pump, a liquid flowmeter, a high-pressure-resistant flexible tube, a pressure-resistant sight glass, a temperature sensor, a test section and a hoisting device. The in-situ load corrosion simulation loop system is a corrosion loop test device which can accurately simulate the flowing regimes of dynamically changing gas-liquid two-phase flow of an oilfield site and the real stress and the dip angle of a pipe. The in-situ load corrosion simulation loop system can be used for studying the influence law and mechanism of load, dip angle and flow pattern of multiphase flow on internal corrosion of pipelines, meanwhile, can be used for evaluation and optimization study on internal pipeline sulfate reducting bacteria corrosion, internal pipeline sand-carrying scouring, a corrosion inhibitor, a bactericide and an anti-sludging agent.

Description

technical field [0001] The invention relates to a corrosion simulation test device, in particular to a set of high temperature and high pressure gas-liquid two-phase H 2 S / CO 2 The environmental in-situ load corrosion simulation loop system belongs to the field of corrosion law research and applicability evaluation of high acid oil and gas field materials. Background technique [0002] Oil and natural gas are still the highest-quality energy in today's society, which is related to the country's political, economic and military security. With the development of the petroleum and natural gas industry, highly acidic sulfur-containing oil and gas fields have become the main force for increasing reserves and production of oil and gas resources in my country. However, highly acidic sulfur-containing oil and gas fields often contain a large amount of highly corrosive gas CO 2 and H 2 S, will lead to severe corrosion of metal materials used in oil fields, and even localized corr...

AI Technical Summary

Problems solved by technology

Especially for stainless steel, the density of the passivation film on the surface of the stainless steel is reduced after loading, and the protective performance is reduced, thereby inducing material corrosion and localized corrosion

At present, the existing loop corrosion system does not consider the influence of load on the corrosion process of metal materials.

[0007] 3) It is difficult to realize the simulation of pipeline internal corrosion under the condition of arbitrary inclination angle: in the actual production process, due to the influence of formation type, burial location and surface morphology, the inclination angle of downhole pipe string and surface pipeline will also change accordingly, thus affecting Corrosion Processes in Pipelines

Most of the existing loops are fixed, and the inclination angle of the pipeline cannot be changed.

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