During the shale gas drainage test stage, the wellhead pressure and temperature are very high, and the produced gas contains a large amount of saturated water, which affects the normal operation of process equipment and gas production pipeline in the test platform. Based on this, on⁃site sampling and test analysis of saturated water were conducted to explore the cause of the effusion in the test platform. Aiming at the reason of liquid accumulation, the scheme of installing partition wall heat exchanger in front of the corrugated plate separator is proposed to reduce the airflow temperature and saturated water content at the inlet of the corrugated plate separator, and Fluent software is used to change the airflow temperature inside the heat exchange tube The situation was simulated. The results show that the average temperature of the air flow in the heat exchange tube can be cooled from 60.34 ℃ at the inlet to 30.00 ℃ at the outlet. The saturated water content can be reduced to 0.731 g/m3 by formula calculation. At the same time, the proposal of installing a hydrophobic hook in the flow channel of the corrugated plate separator is also proposed, and the separation characteristics of the streamlined and hooked corrugated plate separator are analyzed by Fluent software. The results show that the hooked corrugated plate the separation efficiency of droplets can be increased from 28.90% to 76.50%. When the droplet size reaches above 35 μm, the separation efficiency can reach up to 90.00%. The research results have important guiding significance for solving the problem of shale gas test platform liquid accumulation.

Based on the research results in gas field developmment, this paper summarized the development of optimization at domestic and foreign from two aspects: Infilled well deployment, piped network design, pointed out the difficulties and development directions of each part, and provided reference for gas field mining. The analysis points out that there are some difficulties in algorithmic improvement and well pattern density identification in the deployment of infill wells. Further research is needed in the deployment direction of shale gas field infill wells. Model establishment and algorithm improvement are the difficulties in pipe network research, further study of three⁃dimensional terrain relief layout analysis is required.

In order to improve the accuracy of leakage volume calculation of product oil pipelines, the error analysis of the input parameters used to calculate the leakage volume of product oil pipelines is carried out, including the time lag error of the pipeline operation data, the numerical error of the pipeline inner diameter and the numerical error of the oil physical properties. Through the sensitivity analysis of the input parameters, it is found that the leakage volume is the least sensitive to flow rate. The variation rate of pipeline leakage is positively correlated with time lag rate, pressure change rate and inner diameter change rate, while it is negatively correlated with flowrate change rate. The sensitivity of pipeline leakage volume to each input parameter is different within the range of variation rate of parameters.

Due to limitations of laboratory scale, the bending pipe structures inevitably exist in the indoor experimental loop of sequence transportation which will carry out batch transportation contaminated mechanism research. In order to optimize the design of the experimental loop, a two-dimension model was established aiming at the structure of fillet and circular were elbow, thus how the two structures affected the mixing process of sequence transportation by Fluent was simulated. The results showed that the flow field of different scales could be formed at the elbow of the loop, and the low velocity region could be formed from the inner side of the elbow, therefore severe disturbance with mixture quantity increased. Compared with the arc elbow, the mixture quantity of 90 degree bend structure could reach more than 12%. This study had important guidance for the design of the order of the product.

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