Water-transmission dynamic scaling experiment loop and method for non-metal pipe

Abstract

The invention discloses a water-transmission dynamic scaling experiment loop and method for a non-metal pipe. The loop and the method are used for carrying out a simulation experiment on the scaling characteristics of oil-field extraction and transportation pipelines. The loop comprises a liquid storage system I, a power system II, a flow adjusting system III, a pressure buffer system IV and a shunt-wound testing system V, wherein the liquid storage system is used for supplying a water solution with a uniform and stable temperature; the power system is used for supplying power to the experiment loop; the flow adjusting system is used for adjusting the flow of the water solution entering a test pipe section; the pressure buffering system is used for reducing the influence caused by the pressure fluctuation to the scaling of the test pipe section; and the shunt-wound testing system is used for measuring the variations of the scaling amounts of different tubular products along time. The invention further provides a method for carrying out an experiment test by virtue of the loop. According to the method, the variation of the scaling amounts along time under the conditions of differenttubular products, flows, ion concentrations, temperatures and the like can be measured, the basis is provided for the prevention and treatment on the site scaling of the oil field, and the method canbe used for developing and evaluating novel scale inhibitors.

Description

technical field [0001] The invention relates to the technical field of oil field surface engineering, in particular to a non-metallic pipe water delivery dynamic fouling experimental loop and a use method thereof. Background technique [0002] With the development of water injection in domestic oilfields, the water content in oilfield gathering pipelines increases, and the salinity of produced water is high, resulting in increasingly significant scaling problems in pipeline transportation systems. Pipeline fouling has brought hidden dangers to the safe operation of the gathering and transportation system: 1. The effective diameter of the pipeline is reduced, the flow resistance is increased, and the pipeline transportation capacity is reduced; 2. The efficiency of the heating equipment is reduced and the heat loss of the pipeline is increased; 3. Cause sub-scale corrosion, bacterial corrosion, and reduce the life of the pipeline; 4. Cause the pigging ball to be blocked. In ...

AI Technical Summary

Problems solved by technology

Pipeline fouling has brought hidden dangers to the safe operation of the gathering and transportation system: 1. The effective diameter of the pipeline is reduced, the flow resistance is increased, and the pipeline transportation capacity is reduced; 2. The efficiency of the heating equipment is reduced and the heat loss of the pipeline is increased; 3. Cause under-deposit corrosion and bacterial corrosion, reduce the life of the pipeline; 4. Cause the pigging ball to be stuck

In short, the fouling of the gathering and transportation system seriously affects the safe and reliable operation of the pipeline.

[0003] At present, the fouling characteristics are mostly predicted through static experiments, reactor experiments, and hanging plate experiments. Static experiments are mainly based on static experimental data and empirical formulas, which deviate greatly from the on-site production process, and cannot accurately predict the formation and growth of fouling; reaction Although the stirrer can be used to simulate the flow in the kettle test, the circular flow in the kettle cannot simulate the radial flow in the actual pipeline; taking the coupon sample during the coupon test has a great influence on the temperature field, and the test data is of little significance

In addition, the existing dynamic fouling monitoring devices with heat transfer surfaces focus on the fouling research of circulating water heat exchange equipment, and most of them use metal materials such as stainless steel as test objects, and the fouling forms vary greatly with different pipe materials, so it is impossible to To guide the dynamic scaling characteristics of non-metallic pipes (glass steel pipes, PE pipes, etc.) in the actual production process of pipe water transportation

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