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Fitness evaluation method for high-sulfur natural gas pipeline material in service

A technology for evaluating the adaptability of natural gas pipelines, which is applied in the field of material adaptability evaluation of in-service high-sulfur natural gas pipelines, can solve problems such as the difficulty of direct evaluation, achieve easy understanding and practical operation, ensure safe production, and have a simple mathematical model Effect

Inactive Publication Date: 2019-04-09
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

Multiple factors and multiple levels of complexity make direct judgment difficult

Method used

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  • Fitness evaluation method for high-sulfur natural gas pipeline material in service
  • Fitness evaluation method for high-sulfur natural gas pipeline material in service
  • Fitness evaluation method for high-sulfur natural gas pipeline material in service

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Embodiment Construction

[0045] The invention provides a method for evaluating the adaptability of the materials of in-service high-sulfur natural gas pipelines, which combines the corrosion status of in-service natural gas pipeline materials, the aging degree of physical and chemical properties after sampling, the test of sulfur resistance and corrosion resistance after sampling, and the corrosion protection on the service site Measures and other evaluation indicators, through the fuzzy multi-level comprehensive evaluation method to evaluate the service adaptability and safety of pipeline materials, the evaluation results are closer to the objective reality, so that pipeline managers can have a clear and accurate understanding of the service status of high-sulfur natural gas pipelines in service understanding and guiding actual production issues.

[0046] see figure 1 , a method for evaluating the material adaptability of in-service high-sulfur natural gas pipelines in the present invention, first es...

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Abstract

The invention discloses a fitness evaluation method for a high-sulfur natural gas pipeline material in service, comprising the following steps: establishing an evaluation index system for high-sulfurnatural gas pipeline material in service including a corrosion condition of the natural gas pipeline material in service, an aging degree of physical and chemical property analysis after sampling, a test of sulfur and corrosion resistance after sampling, and an evaluation index of on-site corrosion protection measures in service, establishing a fuzzy multi-level comprehensive evaluation, assigningthe evaluation indicators to the weights based on the selected evaluation object and evaluation index system, then determining the grade scores of the indicators, and obtaining evaluation results byusing a fuzzy matrix operation to evaluate the service adaptability and safety of the pipeline material. The material adaptability evaluation system and method established by the invention can meet the pipeline manager's clearer and more accurate understanding of the service state of the high-sulfur natural gas pipeline, and has great significance for the reliable operation of the high-sulfur natural gas pipeline.

Description

technical field [0001] The invention belongs to the technical field of oil and gas pipelines, and in particular relates to a material adaptability evaluation method for in-service high-sulfur natural gas pipelines. Background technique [0002] Oil and gas pipelines in H 2 S, CO 2 Stress corrosion cracking in the environment is an extremely hidden form of localized corrosion, and there is often no obvious warning in advance, so it often causes catastrophic accidents. High-sulfur gas reservoirs are an important part of natural gas reservoirs in my country, such as Dianjiang, Zhongxian, Wanzhou, Kaixian, Kaijiang operating areas in Chongqing, Wolonghe gas field, Jialingjiang gas reservoir, etc. Some of these pipelines were first built in the 1970s and 1980s. Due to the limitation of the technical level during the construction period, the materials of the pipelines initially constructed mainly included 20#, ST45, L245NB, L245NB, L245NCS with additional technical conditions, e...

Claims

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Application Information

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IPC IPC(8): G01N17/00G06F17/18
CPCG01N17/00G06F17/18
Inventor 马卫锋任俊杰蔡克王珂罗金恒赵新伟
Owner BC P INC CHINA NAT PETROLEUM CORP
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