Research on the Stability and Treatments of Natural Gas Storage Caverns With Different Shapes in Bedded Salt Rocks

Liu, Wei; Zhang, Zhixin; Fan, Jinyang; Jiang, Deyi; Daemen, J.J.K.

doi:10.1109/access.2020.2967078

Cited by 60 publications

(26 citation statements)

References 51 publications

(43 reference statements)

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“…Because the water‐filling process is affected by the large drop in height, a waterfall flow is formed in the tube after the waterhead passes through the top point, as shown in Figure . The pipe is full of air before water filling; under the action of its own gravity, the waterhead quickly undershoots and rapidly squeezes the air inside the pipe, causing the pipeline to be overpressured at a low point . Therefore, in the process of water filling, it is necessary to pay close attention to the pressure changes of the two important low points of the pipeline (the first low point of the downhill section and the lowest point of the pipeline) to prevent the pressure from exceeding the design limit.…”

Section: Resultsmentioning

confidence: 99%

Analysis of the water‐filling process for crude oil pipelines with a large drop in height

Liu

Guo

Wang

et al. 2020

Energy Science & Engineering

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To explore the problem of the slack flow and waterhead having a huge impact on the low point of a pipeline during the water-filling process of a large-drop pipeline, the crossing section of the Nujiang China-Myanmar crude oil pipeline (for which the maximum height difference is 1480 m) is taken as an actual case, and water filling of an oil pipe segment with a large drop is simulated based on an OLGA multiphase flow transient simulation. The maximum velocity, pressure, and corresponding liquid holdup at different low points of the pipeline are studied, and the variations of water flow velocity, pressure, and liquid holdup with time at different low points under different load conditions are obtained. A stress analysis of the pipeline is performed through CAESAR II. The results showed that, when the volume flow rate was 900-2000 m 3 /h, the probability of slug flow in pipe could be reduced by 57%. Meanwhile, the tube pressure fluctuation and damage to the pipeline and equipment are reduced and pipeline transportation efficiency is improved, thereby providing an effective basis for engineering practice.

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Section: Resultsmentioning

confidence: 99%

Analysis of the water‐filling process for crude oil pipelines with a large drop in height

Liu

Guo

Wang

et al. 2020

Energy Science & Engineering

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“…The method used in this article can be used not only for the calculation of natural gas pipeline systems, but also for the analysis of the production process of oil and gas pipelines, [39][40][41] and the analysis and calculation of air coolers in gas storage systems. [42][43][44]…”

Section: Formula Correctionmentioning

confidence: 99%

Numerical simulation and simplified calculation method for heat exchange performance of dry air cooler in natural gas pipeline compressor station

Liu

Guo

et al. 2020

Energy Science & Engineering

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In view of the complicated heat transfer calculation for air coolers and the difficulty of directly calculating the exit temperature of natural gas in a compressor station, taking the dry air cooler of model GP12 × 3-6-258-13.0S-S-23.4/DR-Ia configured in the West-East Natural Gas Pipeline II as an example, a three-dimensional simplified model of the air cooler is established. The model is used to simulate a temperature flow field of a dry air cooler-finned tube based on Fluent flow field analysis software. This paper studies the cooling effect of the dry air cooler-finned tube on high-temperature and high-pressure natural gas at compressor outlet. By comparing and analyzing the relationships among natural gas mass flow, inlet air temperature, inlet natural gas temperature, and outlet natural gas temperature for an air cooler, the formula of temperature drop of dry air cooler to natural gas is fitted, and the fitting formula is verified by field operation data. The results show that the average error between the fitting results and the actual data is less than 1.5%, which proves the correctness of the fitting formula and greatly simplifies the heat transfer calculation process for air coolers. K E Y W O R D Sdry air coolers, finned tube, optimization, outlet natural gas temperature

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“…e desorption gas content mainly includes three parts: gas loss during underground drilling (Q 2 ), gas desorption during coal core transport (Q 3 ), and gas desorption during coal core crushing (Q 4 ). e test process is shown in Figure 2 [25][26][27].…”

Section: Principle Of Gas Content Testmentioning

confidence: 99%

Prediction of Residual Gas Content during Coal Roadway Tunneling Based on Drilling Cuttings Indices and BA‐ELM Algorithm

Yang

Hong-wei

Sheng

et al. 2020

Advances in Civil Engineering

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In order to predict the residual gas content in coal seam in front of roadway advancing face accurately and rapidly, an improved prediction method based on both drilling cuttings indices and bat algorithm optimizing extreme learning machine (BA-ELM) was proposed. The test indices of outburst prevention measures (drilling cuttings indices, residual gas content in coal seam) during roadway advancing in Yuecheng coal mine were first analyzed. Then, the correlation between drilling cuttings indices and residual gas content was established, as well as the neural network prediction model based on BA-ELM. Finally, the prediction result of the proposed method was compared with that of back-propagation (BP), support vector machine (SVM), and extreme learning machine (ELM) to verify the accuracy. The results show that the average absolute error, the average absolute percentage error, and the determination coefficient of the proposed prediction method of residual gas content in coal seam are 0.069, 0.012, and 0.981, respectively. This method has higher accuracy than other methods and can effectively reveal the nonlinear relationship between drilling cuttings indices and residual gas content. It has prospective application in the prediction of residual gas content in coal seam.

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Research on the Stability and Treatments of Natural Gas Storage Caverns With Different Shapes in Bedded Salt Rocks

Cited by 60 publications

References 51 publications

Analysis of the water‐filling process for crude oil pipelines with a large drop in height

Analysis of the water‐filling process for crude oil pipelines with a large drop in height

Numerical simulation and simplified calculation method for heat exchange performance of dry air cooler in natural gas pipeline compressor station

Prediction of Residual Gas Content during Coal Roadway Tunneling Based on Drilling Cuttings Indices and BA‐ELM Algorithm

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