Study On The Method Of Predicting The Corrosion Period Of Gathering And Transportation Pipelines

As the extension of development time, the supporting pipe surface gathering system of double-layer oilfield has corroded seriously in A block of northern Shaanxi. The corrosion of pipe in the block of high water and high sulfur is more complicated. Nowadays, this block has replaced almost thirty kilometers of pipes annually. On account of the corrosion, a direct economic loss is about 5 million yuan .It also has triggered frequent problems in environment and safety which is including secondary impacts. Corrosion is one of the main factors that affect the service life of the buried pipeline. The research that is about the prediction method of pipeline corrosion period will provide a basis for monitoring and reinforcing pipeline corrosion situation in advance.Under the premise of the corrosion rate prediction, Firstly, the corrosion status of the block in the A block of Northern Shaanxi is analyzed, and the transmission medium is analyzed. Coupon weight loss method was adopted in laboratory experiments to evaluate the corrosivity of various factors of Block A water pipeline.On the basis of experiments, analyzed and sorted the impact of various factors with gray correlation method to evaluate the impact of various factors on the corrosion rate, then identified the main factors of the corrosion rate. Combined Genetic BP神经Network algorithm with laboratory experiments to predict the corrosion rate of the pipeline under the influence of different factors, and then drawn graphs of the comparison results. Finally, comparing the results showed that:prediction and experimental results fit a higher degree. A method of combination of experimental simulation and algorithms prediction,can be a good tool to predict water pipeline corrosion rate in Block A.