Method for evaluating anti-scaling agent of crude oil gathering pipeline in laboratory

Abstract

The invention relates to a method for evaluating an anti-scaling agent for a crude oil gathering pipeline in a laboratory. The invention belongs to the technical field of laboratory evaluation. The method for evaluating the anti-scaling agent for the crude oil gathering pipeline in the laboratory is characterized by comprising the following technological processes: (1) putting an on-site oil and water sample into a circulator with a heater and a stirrer, starting the stirrer and the heater and heating to the on-site working condition temperature; (2) weighing a scale sample, putting the scale sample into a filtering box and fixing the filtering box in a circulating pipeline; (3) adding the anti-scaling agent into the oil and water sample of the circulator; (4) starting a circulating pump, circulating and accumulating the experimental time; (5) after the experiment, taking out the filtering box in the circulating pipeline, weighing the scale sample in the filtering box and calculating the loss rate of the scale sample. The method has the advantages that the operation is simple, the on-site process working condition can be simulated maximally, the obtained experimental result is more accurate, and the anti-scaling agent with good effect obtained by evaluation is more suitable for on-site use.

Description

technical field [0001] The invention belongs to the technical field of laboratory evaluation, in particular to a method for laboratory evaluation of crude oil gathering and transportation pipeline descaling agent. Background technique [0002] In the production process of offshore oilfields, due to changes in the process environment, scaling ions will cause scaling in the production process, block key parts of technical systems such as pipelines, pumps, and valves, and reduce oil field productivity; severe scaling will cause pressure differences Too large, eventually causing the platform to be discontinued. [0003] At present, descaling agent is one of the chemicals commonly used in oil fields. If the descaling agent is used directly on site without being screened and evaluated in the laboratory or the evaluation method is incorrect, the effect of the descaling agent may not be good, and the scale accumulated in the process pipeline cannot If it is removed in time, there i...

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Problems solved by technology

[0002] In the production process of offshore oilfields, due to changes in the process environment, scaling ions will cause scaling in the production process, block key parts of technical systems such as pipelines, pumps, and valves, and reduce oil field productivity; severe scaling will cause pressure differences Excessively large, eventually causing the platform to be discontinued

[0003] At present, descaling agent is one of the chemicals commonly used in oil fields. If the descaling agent is used directly on site without being screened and evaluated in the laboratory or the evaluation method is incorrect, the effect of the descaling agent may not be good, and the scale accumulated in the process pipeline cannot Remove it in time, there is a risk of clogging the pipeline or even shutting down the oil field

The traditional method for evaluating descaling agents is the static soaking method. Although this method is simple and easy to operate, the experimental conditions cannot simulate the actual situation on site to the greatest extent, and there are technical problems such as inaccurate evaluation results and low efficiency.

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