Study on corrosion mechanism and the risk of the shale gas gathering pipelines

Liao, Kexi; Qin, Min; He, Guoxi; Chen, Hou; Zhang, Shijian

doi:10.1016/j.engfailanal.2021.105622

Cited by 38 publications

(8 citation statements)

References 41 publications

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“…The maximum defect depth reached 144.9351 μm, which was a factor of 12.5 higher than that at 0 MPa. This result is similar to that of Zhao [27,28] and Leng [35]. Therefore, the occurrence of localised corrosion was closely related to O 2 .…”

Section: Resultssupporting

confidence: 88%

“…Figure 7 presents the XRD patterns of corrosion products of L245N steel with different O 2 contents in a CO 2 –O 2 –Cl − environment. In a CO 2 –Cl − environment, the diffraction peaks were primarily FeCO 3 and Fe peaks, indicating that the corrosion products were mainly FeCO 3 [7,23,26,28,40]. The Fe diffraction peaks were derived from the matrix composition of the steel.…”

Section: Resultsmentioning

confidence: 99%

“…The promotion effect of O 2 content on corrosion is very important. Many scholars have confirmed that the main role of O 2 in a CO 2 environment is to promote the cathodic reaction process as a depolarisation agent [27,28], but the effect on localised corrosion is mainly due to the inhibition or destruction of the formation of the FeCO 3 product scale [29,30]. Compared with a dense FeCO 3 scale, the oxide scale with a loose structure and poor protection performance would promote the dissolution of the matrix and the diffusion of Fe 2+ , resulting in the acceleration of mass transfer and the aggravation of corrosion in the localised area.…”

Section: Introductionmentioning

confidence: 99%

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Localised corrosion failure of an L245N pipeline in a CO₂–O₂–Cl⁻ environment

Leng

Tian

Liao

et al. 2023

Corrosion Engineering, Science and Technology

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Multicomponent thermal fluid flooding has become a widely used and very effective heavy-oil recovery technology, but the harsh CO 2 -O 2 -Cl − environment can lead to serious corrosion perforation failure of the pipeline. Therefore, the influence of O 2 content and main controlling factors on corrosion perforation were investigated through a weight-loss experiment, corrosion defect test, characterization and grey correlation method. The results showed that, with the increase in O 2 content, the general corrosion rate and localized corrosion rate increased. The uneven protection performance of the product after the addition of O 2 was found to be the key cause of localized corrosion. In addition, the synergistic effect of O 2 -Cl − promoted the lateral and longitudinal expansion of pits. The results of the grey correlation showed that the temperature (30-120 °C) had a greater impact on localized corrosion compared with the content of O 2 (0-0.045 MPa) and Cl − (0-16,000 mg/L).

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Localised corrosion failure of an L245N pipeline in a CO₂–O₂–Cl⁻ environment

Leng

Tian

Liao

et al. 2023

Corrosion Engineering, Science and Technology

Self Cite

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“…The experimental period was 7 days, and the mass difference of the metal samples before and after the experiment was divided by the reaction time to obtain the average corrosion rate (weight loss tests [37]). Then, the experiments were repeated under different conditions [38,39]. Then, the multiphase flow simulation software package OLGA [40] was used to expand the experimental parameters, including liquid flow rate, temperature, inclination angle, CO 2 partial pressure, and H 2 S partial pressure, in order to explore the influence of 18 other parameters including flow pattern, flow rate and shear stress on the corrosion rate.…”

Section: Materials and Experimental Databasementioning

confidence: 99%

Metal Corrosion Rate Prediction of Small Samples Using an Ensemble Technique

Yang¹,

Zheng²,

Zeng³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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Accurate prediction of the internal corrosion rates of oil and gas pipelines could be an effective way to prevent pipeline leaks. In this study, a proposed framework for predicting corrosion rates under a small sample of metal corrosion data in the laboratory was developed to provide a new perspective on how to solve the problem of pipeline corrosion under the condition of insufficient real samples. This approach employed the bagging algorithm to construct a strong learner by integrating several KNN learners. A total of 99 data were collected and split into training and test set with a 9:1 ratio. The training set was used to obtain the best hyperparameters by 10-fold cross-validation and grid search, and the test set was used to determine the performance of the model. The results showed that the Mean Absolute Error (MAE) of this framework is 28.06% of the traditional model and outperforms other ensemble methods. Therefore, the proposed framework is suitable for metal corrosion prediction under small sample conditions.

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“…Furthermore, the high flow speed of the produced medium from some high-yield well also aggravated the erosion effect to the inner wall of the pipeline. So there are more and more corrosion failure problems of the pipeline and its accessories, and severely restricted the application of the oil and gas multiphase mixed transportation technology [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Cause Analysis of a Surface Pipeline Flange

Li²,

Wang

et al. 2023

J. Phys.: Conf. Ser.

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Corrosion was found on the inner wall and sealing groove end face of a surface pipeline flange in an oilfield in western China after one year’s service. Corrosion causes were investigated by physical and chemical property tests, metallographic examination, scanning electron microscope, scanning electron microscopy(SEM) inspection, energy disperse spectroscopy(EDS) analysis and X-ray diffraction(XRD) analysis. The results showed that the chemical composition and mechanical properties of the flange were all in accordance with the corresponding parameter requirements, and the corrosion phenomenon was mainly attributed to CO2 corrosion. High temperature and high medium flow rate also had a big influence on the acceleration of the corrosion process. Corrosion of the sealing groove end face was attributed to galvanic corrosion, the corrosion potential difference between the flange and gasket was the main reason for the galvanic corrosion.

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Study on corrosion mechanism and the risk of the shale gas gathering pipelines

Cited by 38 publications

References 41 publications

Localised corrosion failure of an L245N pipeline in a CO₂–O₂–Cl⁻ environment

Localised corrosion failure of an L245N pipeline in a CO₂–O₂–Cl⁻ environment

Metal Corrosion Rate Prediction of Small Samples Using an Ensemble Technique

Corrosion Cause Analysis of a Surface Pipeline Flange

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Study on corrosion mechanism and the risk of the shale gas gathering pipelines

Cited by 38 publications

References 41 publications

Localised corrosion failure of an L245N pipeline in a CO2–O2–Cl− environment

Localised corrosion failure of an L245N pipeline in a CO2–O2–Cl− environment

Metal Corrosion Rate Prediction of Small Samples Using an Ensemble Technique

Corrosion Cause Analysis of a Surface Pipeline Flange

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Product

Resources

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Localised corrosion failure of an L245N pipeline in a CO₂–O₂–Cl⁻ environment

Localised corrosion failure of an L245N pipeline in a CO₂–O₂–Cl⁻ environment