Experimental Study On Pipeline Corrosion Of Slug Flow Including Carbon Dioxide

Today the needs of energy are increasing, so the production and transportation of oil and gas are paid more attention. In the oil and gas gathering systems, pipeline corrosion is an issue of widespread concern. It is always a hot topic that knowing pipeline corrosion lows well and exploring better anticorrosion measurements.This topic is based on the oil and gas gathering systems in the carbon dioxide drive experiment area of the Chunliang Oil Production Plant in Sinopec Shengli Oil Field. This research studied the relationship between oil-gas-water three-phase flow patterns and pipeline corrosion by simulating the multiphase flow environment in the production of oil and gas gathering and transportation on the oil field. According to the results of the experiment, a gas and liquid stir model in gas-water mixture transportation pipelines has been established, which makes pipeline corrosion protection come true by simplifying flow patterns. Both researches are studied on the simulation experiment bench of the multiphase flow corrosion, which implements oil-gas-water three-phase slug flow state with low oil inside. The experimental results show that the pipeline corrosion rate increases with the slug frequency increase as well as the liquid flow rate increase. Improving the vapor liquid ratio can reduce the corrosion rate within limits. Corrosion rate of the top of the pipelines will be decreased with the increase of Froude number. Also the effects of carbon dioxide partial pressure, oxygen levels and other parameters on the corrosion rate were studied.