Method of predicating internal corrosion degrees of on-service oil and gas pipelines

Abstract

The invention discloses a method of predicating the internal corrosion degrees of on-service oil and gas pipelines and belongs to the field of oil and gas gathering and transferring. The method comprises the following steps: analyzing the internal detection result of each long oil and gas pipeline in a plurality of long oil and gas pipelines after internal inspection; and predicting the internal corrosion degree of the target on-service long oil and gas pipeline according to the internal detection results of the long oil and gas pipelines of which the total score of all influence factors of the internal corrosion degree of the target on-service oil and gas pipeline and the total score of all influence factors of the internal corrosion degrees of the plurality of long oil and gas pipelinesare close to or equal to the total score of all influence factors of the internal corrosion degree of the target on-service long oil and gas pipeline. Therefore, the internal corrosion degree of the target on-service long oil and gas pipeline can be predicted at the time interval of two times of internal detection. The long oil and gas pipelines with relatively severe internal corrosion degrees are detected inside preferably, so that the internal detection work is arranged scientifically and reasonably.

Description

technical field [0001] The invention relates to the field of oil and gas gathering and transportation, in particular to a method for predicting the internal corrosion degree of long-distance oil and gas pipelines in service. Background technique [0002] Long-distance oil and gas pipelines are important equipment in oil and gas gathering and transportation. Since there may be substances such as hydrogen sulfide, carbon dioxide, condensate oil and / or formation water in the medium transported in long-distance oil and gas pipelines that will corrode the inner wall of long-distance oil and gas pipelines, Corrosion and perforation from the inside to the outside may occur in long-distance oil and gas pipelines in service, which may cause leakage of medium transported in long-distance oil and gas pipelines and cause major economic losses. Therefore, it is necessary to detect the degree of internal corrosion of long-distance oil and gas pipelines in service to determine if repairs a...

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Problems solved by technology

[0006] In order to solve the problem in the prior art that it is impossible to know which long-term oil and gas pipelines may be perforated due to internal corrosion within the time interval between two adjacent internal inspections, which leads to the blindness of the internal inspection work, the embodiment of the present invention provides A method for predicting the degree of internal corrosion of long-term oil and gas pipelines in service

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