bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical Simulation of Propellant Diffusion Considering Chemical Reaction
Authors: Zhan Xiang , Cui Cunyan , Zhao Zelin , Li Donghao 
Published: February 2021

Abstract
The reaction mechanism of UDMH and NTO propellant vapor under storage condition was analyzed in order to develop emergency measures for propellant leakage in extreme cases. The distribution of propellant vapor concentration, reaction products and temperature in a closed space were studied by numerical simulation. According to the results of numerical simulation, the propellant concentration distribution, resultant of reaction distribution, as well as temperature distribution was obtained. Results showed that the leakage diffusion process can be divided into three stages: heavy gas deposition stage, rapid reaction stage and equilibrium diffusion stage. In the heavy gas deposition stage, propellants are mainly affected by gravity. During the rapid reaction stage, the chemical reaction between propellants plays a certain role in the diffusion process. In the equilibrium diffusion stage, the bottom temperature of the confined space increased significantly, the highest temperature reached 306K.
A multi-source data collection and information fusion method for distribution network based on IOT protocol
Authors: Cai Yongxiang , Xiao Xiaobing , Tian Hao , Fu Yu , Wu Peng , He Hongliu 
Published: February 2021

Abstract
With the construction of Global Energy Internet, Intelligent distribution network has more and more characteristics of multi scene, multi service and changeable measurement and control objects. In order to realize data collection and information exchange among the intelligent terminal and energy, power grid, load, energy storage and other control resources in distribution network, we should research an architecture which can adapt to various data sources Based on dynamic self describing protocol.
Introduction on Research and Application of Nickel Base Superalloy GH4169
Authors: Zheng Jianjun , Guo Yang , Liu Xiao , Zhang Zhihao , Zhang Tao 
Published: February 2021

Abstract
In this paper, the research and application of nickel base superalloy GH4169 in recent years was introduced. GH4169 alloy is a precipitation strengthened nickel base superalloy, which has been widely used in aeroengine, petroleum, nuclear industry and other fields. The phase composition, three common heat treatments as well as the application prospect were elaborated. At last, the service temperature range and application area of GH4169 alloy was believed to be further expanded with the adjusted alloy composition and the corresponding hot working process.
Research on development problems and countermeasures of distributed photovoltaic power generation projects
Authors: Li Qiaoqiao 
Published: February 2021

Abstract
In China, photovoltaic industry has developed rapidly in recent years, and distributed photovoltaic power generation projects account for an increasing proportion of the overall photovoltaic projects. Distributed photovoltaic power generation projects are facing many problems after the “531 New Deal”. For example, small and medium-sized photovoltaic companies are facing difficulties in financing, market-oriented transaction mechanisms need to be improved, related technologies need to be further improved, and the development and approval process is relatively cumbersome. Innovative financing methods are required, Multi-channel financing, through policy support, promoting system reform, increasing technological innovation, and integrating with other industries to seek further development.
Analysis and Treatment of Abnormal Vibration of Unit 2 in a Power Plant
Authors: Chen Fei , Cao Hao , Zhang Bolin , Wei Jilong 
Published: February 2021

Abstract
The Unit 2 in a power plant was first started in 2016 after the flow through transformation, the vibration basically reached the excellent standard in the single valve state with the load running. In the sequence valve state, the high and intermediate pressure rotor occurred obvious steam induced vibration fault at high load. By reducing the main steam pressure properly, the No. 2 regulating valve is in full open state as soon as possible, thus reducing the steam exciting force of the high and intermediate pressure rotor, the vibration fluctuation value of the unit is obviously reduced at high load, and the phenomenon of steam induced vibration is effectively suppressed, and the unit can be safely carried out for a long time.
Analysis of large scale fracturing effect and influencing factors in low permeability oil reservoir
Authors: Lin Liu 
Published: February 2021

Abstract
H Oilfield is a complex fault field. Due to poor physical properties, it is still difficult to effectively inject wells after fracturing. In addition, the repeated fracturing effect has deteriorated year by year. Most of the blocks are generally low in production, and the oil recovery speed is less than 0.31 %. Since 2014, large-scale fracturing field tests have been carried out in H Oilfield. By analyzing the influence of various factors on fracturing effect, the grey correlation method was used to analyze the influence of various factors on oil production after fracturing. The results showed that the main factors influencing the fracturing effect in the test area were formation coefficient, porosity, oil saturation, amount of sand carrying fluid, amount of fracturing fluid, and amount of sand added. The research results can be used for reference and guidance to improve the development level of low-permeability oil fields.
Research on Smart gas safety supervision system based on IOT technology
Authors: Ni Na , Yang Fan , Wang Chaonan 
Published: February 2021

Abstract
Gas management units have a large number of gates to be supervised. This paper introduces an intelligent gas well management system. By installing all kinds of intelligent sensing terminals in the gas well, it can monitor the massive gas well in real time, and form the gas well internet of things with the help of NB-IOT technology, and gather the data to the data analysis cloud platform. Finally, the perception data is processed and analyzed in the data analysis cloud platform, so as to conduct safety supervision and accuracy of the massive gas wells. At the same time, it uses the historical monitoring big data collected by the system for a long time to build the risk prediction model of the gas well, and carries out the safety risk level assessment and fault prediction and early warning for the key gas well, so as to comprehensively realize the intelligent management of the gas well.
Numerical analysis of coal seam heat injection
Authors: Jia Quanmin 
Published: February 2021

Abstract
Coal seam heat injection is a new type of enhanced gas drainage method. In order to obtain the influence law of coal seam heat injection on the gas content in coal, the coupled equation of heat, fluid and solid multiphysics under coal seam heat injection is used to solve it with the help of numerical analysis software. the law of coal gas content change under the condition of coal seam heat injection is obtained: During the process of coal seam heat injection, the temperature of the coal near the heat injection borehole is relatively high. With the increase of the heat injection temperature, the adsorbed gas content in the coal gradually decreases, the free gas increases, and the residual gas content of the coal decreases more significantly. The extraction time was effectively shortened, and the expected goal of heat injection enhanced extraction was achieved.
Modelling the advantages of the DSM (deep slurry mixing) technology on the piling process of the plug-in steel
Authors: Liu Wenbin 
Published: February 2021

Abstract
The development of the bay area is restricted by the cross-sea comunacations. Recently, the bridge-tunnel system is a perfect solution for this question. The man-made island is a key connector in this system by connecting the bridge and tunnel, and creats a buffer zone of the comunacation. The plug-in steel cylinders are suitable structure for the constructure of the man-made island due to its convenience, reliablity, and low-cost. In practice, the sand layer and other hard soil layers challenges the piling of the cylinders, causing the structure failure of the cylinder and other problems. The pre-treatment with DSM (deep slurry mixing) technology is a effective way to improve the piling process. This paper models and analyzes the piling of the cylinder through the sand layer treated by DSM technology with in-site tests and numerical simulation method. The advantages of the DSM technology are highlighted and quantificated to make a contriobution in practice.
Corrosion failure behavior analysis and Countermeasures of gas transmission pipeline
Authors: Nan Zhang 
Published: February 2021

Abstract
in the process of natural gas pipeline transportation, due to hydrogen sulfide and other components in natural gas, it is easy to lead to pipeline corrosion, and leakage accident occurs in serious cases, which brings serious harm to natural gas production. The corrosion and anti-corrosion situation of natural gas pipeline transportation is analyzed to prevent various corrosion accidents and ensure the safe operation of long-distance pipeline system. According to different types of corrosion, the prevention of metal pipeline corrosion is given priority to, and then the corrosion treatment is carried out to avoid serious corrosion of pipeline, improve the safety factor of natural gas long-distance pipeline system, and meet the technical requirements of natural gas production.
Research and Countermeasures of interlayer interference in main reservoir of ASP flooding
Authors: Xing Juanjuan 
Published: February 2021

Abstract
According to the recognition of the industrial production of ternary compound flooding in a development zone, it is believed that the development mode of ASP flooding can expand the sweep efficiency, improve the development effect of a class of oil layers and further improve the recovery. However, the contradiction between A I 33 and upper A I 1-32 layers is prominent, which leads to uneven oil production, rapid rise of water cut in the production wells, short time of low value period and so on. In order to reduce the interlayer contradiction, the interlayer contradiction coefficient is introduced to study the interlayer interference law in different development stages of ASP flooding in combination with reservoir type and vertical heterogeneity of an oilfield, and the technical countermeasures for layered system development are put forward. The straight joint development technology is adopted in some potential areas of an l test area to exploit A I 3 reservoir, and the ideal development effect is achieved. The production degree of the reservoir is 88.3%, and the enhanced oil recovery is 26.23%.
The influence of compound heating power distribution on heat transfer
Authors: Sun Fan , Wu Wenfeng , Xi Junpeng 
Published: February 2021

Abstract
With the continuous deepening of oil and gas resource development, the number of large cargo tankers is increasing rapidly, and the tankers need to heat and keep the cargo oil in the tanks during navigation. However, the traditional steam coil heating method has many problems, such as low thermal efficiency and large total fuel consumption, which will cause energy waste and increasing oil tanker transportation costs. Microwave heating technology has the characteristics of fast, uniform and efficient heating, and is widely used in petroleum extraction and viscosity reduction of heavy oil. This paper proposes a new heating method of steam-microwave composite heating to heat the cargo in the tanker cabin. Taking a VLCC side cabin as a prototype, a three-dimensional numerical scale model is established through COMSOL software to study the influence of thermal efficiency under different power distribution between steam and microwave. The research results show that when the total power is constant, the smaller the proportion of microwave power, the more beneficial it is to improve the heat transfer efficiency in oil heating. This research has important guiding significance for improving oil heating efficiency and saving energy consumption.
Pitting corrosion behavior of metal materials and research methods
Authors: Wang Fan , Shan Qiaoli , Zhang Fan , Lu Feng , Li Jinling , Yu Tao , Qu Chengtun 
Published: February 2021

Abstract
Pitting corrosion occurs easily in metal pipelines containing corrosive media, which leads to premature failure of pipelines, oil, gas and water leakage, and increases the risk of environmental pollution. In this paper, the conditions of metal pitting, several nucleation mechanisms, growth and repassivation processes of metal metastable pitting are summarized. Corrosion electrochemical measurement technology can reflect the behavior characteristics of metal materials in the process of corrosion. The application of pitting of metal materials in the medium is introduced by using such electrochemical measurement techniques as polarization curve, electrochemical impedance spectrum, electrochemical noise and scanning electrochemical microscope.
Study on influence characteristics of shield tunnel depth and spacing on settlement in clay strata
Authors: Cheng Jinguo , Jiang Yusheng , Jiang Hua , Meng Lingfeng , Chang Longfei 
Published: February 2021

Abstract
The surrounding ground disturbance and surface settlement induced by shield construction are the key problems of tunnelling control and necessary to be studied. Taking the shield tunnel project of Beijing Subway Line 14 as the research background, this paper studies the influence of tunnel spacing and depth on surface settlement distribution by numerical simulation method, and analyzes the relationship between the two factors and maximum settlement. The results indicate that the increase of tunnel depth or tunnel spacing leads to the decrease of the maximum settlement and the settlement reduction rate increases. With the increase of tunnel depth, the settlement trough presents approximately symmetrical distribution, and the symmetry axis is inclined to the first tunnel. With the increase of tunnel spacing, the superposition effect of twin tunnel excavation decreases, and the settlement trough transits from U-shaped to W-shaped with the maximum settlement decreasing relatively from single peak to double peaks. Also, the tunnel depth or spacing is highly correlated with the maximum settlement in a certain range, and the tunnel depth has a stronger linear correlation than the tunnel spacing. The research results provide certain theoretical guidance and references for the prediction of ground deformation and settlement control of shield construction.
Measures of Formation Damage and Protection in the Water-Injection Process —the A block in Xinjiang Oil Filed
Authors: Zhang Zhichao , Li Daiqiang , Xiao Hongrong , Han Fengze , Xu Rui , Liu Yuhang 
Published: February 2021

Abstract
On the basis of re-recognizing the geological characteristics of the reservoir in Well A, using laboratory experiments, statistical analysis and other methods, systematically carry out injection and production dynamic analysis in Well A, analysis of damage mechanism of water injection wells, analysis of reservoir damage factors and reservoir Research on protection technology, put forward suggestions on reservoir protection technology and augmented injection technology for well An area. Mixed injection of water is likely to cause insoluble scaling and lead to blockage of water injection pipelines and reservoir pore throats. Working fluids that are not compatible with the formation enter the formation and also cause blockage of the reservoir. Therefore, oil reservoirs must not only pay attention to reservoir protection measures during water injection development It is also necessary to strictly control the quality of the injected water and strictly select additional injection fluids to effectively protect the reservoir and carry out long-term and efficient water injection operations.
Research and application of asynchronous injection-production in ultra-low permeability horizontal well area
Authors: Chen Xiaoyan 
Published: February 2021

Abstract
When using horizontal wells to exploit ultra-low permeability oil fields, the development effect is usually ensured by increasing the scale of fracturing reconstruction. However, it also leads to the increasing difference of seepage capacity between matrix and fracture, which makes it easier to see water in horizontal wells after water injection and difficult to recover after water cut rises. Therefore, asynchronous injection-production test was carried out in the ultra-low permeability horizontal well area, making full use of the artificial fracture of horizontal well as the high permeability channel, and performing oil-water replacement through full imbibition between high and low permeability layers, so as to improve oil recovery. On the basis of theoretical guidance, during the summary of practice, the main factors affecting the implementation effect of asynchronous injection and production are gradually analyzed, and the reasonable parameters in the implementation process are clearly defined, so as to explore a new treatment method for the middle and high water cut stage in the ultra-low permeability horizontal well area.
Research on Protective Development of Wetland Ecological Resources in Poyang Lake
Authors: He Jianbo , Wang Zhen 
Published: February 2021

Abstract
As one of three major ecological regulatory systems in the world, wetlands play an important role in protection of ecological environment and biodiversity. As the largest freshwater lake in China, Poyang Lake is also one of the areas with the most abundant biological resources in wetland ecosystem in China, which has great ecological and economic benefits. In recent years, a string of problems inevitably exist in the further development of Poyang Lake wetland ecological resources. Based on comprehensive introduction of Poyang Lake wetland ecological resources, this paper makes a comprehensive analysis of its development and utilization status and existing problems. Besides, it also puts forward a series of strategies for protection and development of Poyang Lake wetland, in an effort to further protect ecological resources of Poyang Lake wetland and realize the sustainable utilization of resources.
A review of prediction methods for oilfield produced water scaling
Authors: Yan Yan , Yu Tao , Song Jiayu , Wu Baichun , Qu Chengtun 
Published: February 2021

Abstract
In oilfield development, pipeline corrosion and reservoir damage caused by produced water scaling are serious problems. Studying the scaling trend of produced water, and predicting the scaling position, scale amount, and scale type is of great significance to the production and development of oilfields, as well as scale prevention and cleaning. In this paper, the mechanism of scaling in produced water is studied from the perspective of five aspects: fluid incompatibility, thermodynamic condition change, crystal adsorption, kinetic factors and bacterial corrosion; moreover, other factors affecting the scaling are analyzed. Mathematical models of scaling prediction methods, scaling prediction methods, and simulation experiments of scaling prediction methods are introduced, and the characteristics of each scaling prediction method and simulation experiment are compared. Finally, the development of scaling prediction methods is prospected.
Analysis of influencing factors of wells with high operating pressure and suggestions for the next step
Authors: Shi Jing 
Published: February 2021

Abstract
At present, due to the high pressure and large overflow of the operation well, the operation cycle is long and can not be carried out normally, and the operation can not be carried out except by means of controlled injection and depressurization, shut-in and depressurization, and pressurized operation. As a result, the normal production of oil and water wells is seriously affected, the utilization rate of oil and water wells is reduced, and the production of oil fields is affected. Therefore, the influencing factors of wells with high operating pressure are analyzed and suggestions are made in the next step. In this paper, the main influencing factors of the wells with high operating pressure are found out by investigating the current situation of the wells with high operating pressure and analyzing the causes. All the factors are classified, and detailed analysis is carried out according to the corresponding influencing factors. The effective treatment methods and tracking mechanism are put forward to reduce the number of wells that can not operate normally due to high operating pressure.
Discussion on Deviation Correction Technology of Long Borehole in Gas Drainage
Authors: Xu Zunyu 
Published: February 2021

Abstract
To solve the drilling layer (especially small inclination to wear long borehole) deviation cause gas control drilling control range is not up to standard, large quantities and the problem of poor drainage effect in Xinji coal mine based on the analysis of borehole construction result in deviation in a variety of reasons, targeted in technology, management, system, equipment, and adopted a series of effective measures on the scene to “rectify”, puts borehole deflection can be controlled within the scope of reduced the drilling quantity, raise the drilling control ability, increase the gas control working time, realized the “technical economic integration”.
Analysis on the effect of direct reading seal checking instrument in seal checking
Authors: Jiang Sihao , Ma Ning , Jin Haibo 
Published: February 2021

Abstract
The advantages and disadvantages of common sealing methods are analyzed. Aiming at the low sealing rate of bridge type eccentric distribution pipe string packer in Daqing Oilfield, this paper starts with the structure of bridge eccentric distribution pipe string and normal operation and water flow direction during sealing, and combines with the sealing section method sealing principle, discusses the main factors affecting the sealing efficiency of bridge eccentric distribution pipe string. The direct reading sealing tester produced by Xi’an Stan company is optimized. The working principle and sealing process of the sealing tester are analyzed. The switch operation of injection well is optimized. The research results show that: using the direct reading packer, combined with the off on off water injection operation, can verify the sealing performance of the bridge type eccentric distribution pipe string packer, the sealing effect is intuitive, and the test success rate is high.
Study and application of reconstructing seepage field in high water cut and high recovery reservoir based on YSM oilfield
Authors: Li Xuewei , Wang Hongwei , Li Guopeng , Zhou Fushuang , Wu Hui , Chen Yufang , Tai Honglian 
Published: February 2021

Abstract
Through decades of development most of oilfields in china, has now entered high water cut and recovery degree are the “twin” stage, the reservoir physical property, well pattern evolution and the influence of injection-production dynamic, “twin” phase residual oil show the “overall scattered, local enrichment” distribution characteristics, enrichment of its dispersion characteristics not only show the macro distribution, injection-production control area at the same time also show the level of pore microscopic dispersion and enrichment conditions. The key to the study of residual oil in “double high” stage and the implementation of or lies in how to understand the well pattern injection and production seepage field under the control of geological factors.