bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical Simulation of Wind Changes after Turning at T-shaped Roadway Intersection
Authors: Lu Guangli , Zhao Jianfeng , Xing Feibiao , Wu Zanlong 
Published: September 2020

Abstract
Modeling and numerically simulating the intersection of semicircular arch and rectangular cross-section under different air inlet directions, studying the law of wind flow and the location of the average wind speed point, and providing a basis for the deployment of wind speed sensors. Through simulation, it is found that the influence of wind speed on wind flow change is very small. The law of wind flow change under different wind speeds is consistent, and the distance between the average wind speed point and the tunnel wall is also consistent. Along the direction of wind flow, the flow field near the roof and the side with larger air volume is relatively stable, which is suitable for the arrangement of wind speed sensors.
Numerical Simulation Study on the Laws of Smoke Backlayering of Fire in Level Roadway of Metal Mine
Authors: Tian Mengya , Lu Guangli , Liu Beibei , Zhao Jianfeng 
Published: September 2020

Abstract
In order to study the law of smoke backflow in the middle of a metal mine fire, the FDS fire simulation software was used and the actual mine was used as the research background to establish a model including the middle section and the ramp. Set 6 kinds of fire source power of 5MW, 10MW, 15MW, 20MW, 25MW and 30MW, 1m/s, 1.5m/s, 2m/s, 2.5m/s and 3m/s 5 kinds of mid-range wind speed and 5%, 10%, 15% and 18% slopes are used to study the development rule of flue gas counterflow under different conditions. The results of the study show that the reverse flow range of the smoke flow in the middle section of different fire source powers can reach 8~30m, and the wind speed in the middle section has a significant effect on the suppression of the reverse flow of the flue gas. At the time, the length of fire smoke counterflow gradually decreased.
Effect of Laser scanning speed on Wear Behavior of 45# Steel against Plant Abrasive
Authors: Huang Xiaopeng , Wan Fangxin , Li Wuqiang , Wu Jingfeng , Huang Jianlong 
Published: September 2020

Abstract
In this paper, the author studied the effect of laser quenching scan time on the wear resistance of 45# steel against plant abrasive by using alfalfa meal as a typical plant abrasive. The results showed that under the experimental conditions, the maximum surface hardness of the material can reach 735HV, and the maximum hardness of the material is between 0.5 and 0.8 mm from the surface; the wear resistance of 45# steel after laser quenching is much higher than that without laser; the higher hardness of the treated specimen, the better wear resistance; in comparison with the untreated specimen, the plow depth of the surface of the specimen after laser treatment is significantly shallower and narrower, and the degree of fatigue wear is also significantly smaller than untreated specimen.
Study on Acoustic Detection Method of Gas Pipeline Leakage
Authors: Zhao Yu , Ma Fan , Zhao Na , Ma Jian 
Published: September 2020

Abstract
Gas pipeline leakage will not only threaten people’s life and property, but also lead to serious environmental pollution and waste of resources. Based on the analysis and summary of domestic and foreign literature in recent years, the main causes of gas pipeline leakage are summarized, and the current main gas pipeline leakage detection methods are studied, hoping to provide certain reference for pipeline operation safety management.
Analysis on Electrochemical Impedance Spectroscopy of the Hydration Process of Cement-based Materials with a Large Amount of Mineral Admixture
Authors: Yang Zhuo , Huang Yineng , Zhu Lie , Xu Han , Yu Dingcheng , Hou Zhenkun 
Published: September 2020

Abstract
High-performance concrete with a large amount of mineral admixtures is more and more preferred by research scholars. The pozzolanic activity and chemical constituents of mineral admixture directly affect the secondary hydration reaction time, and ordinary microscopic test means cannot reflect the continuity of chemical reaction process. In this paper, slag, fly ash and silica fume were used as mineral admixture to explore the electrochemical impedance spectroscopy change of mixing amount and curing age of a large amount of mineral admixture on the hydration process of cement-based materials, and the influence of mineral admixture ratio on electrochemical impedance spectroscopy was studied, the research results showed that the secondary hydration reaction of fly ash mainly occurs at the age of 42d-60d, while the secondary hydration reaction of slag mainly occurs at the age of 21-42d. The micro-aggregate effect of fly ash plays a role in increasing the electrochemical impedance of the cement slurry from the early stage of mixing, while the slag increases the electrochemical impedance of cement slurry due to the secondary hydration reaction. This paper continuously tested the hydration process of fly ash, slag and silica fume on cement-based materials.
Study on optimization model of overseas oil and gas resources structure
Authors: Sun Yan , Zhu Xueqian , Qi Liming , Huang Shanming , Zhang Tao 
Published: September 2020

Abstract
Due to the unreasonable structure of overseas oil and gas resources and the lack of resource optimization strategy will seriously affect the stable development of oil companies in the global field, it is an urgent problem for oil companies to provide scientific and rapid optimization solutions to meet the resource allocation objectives for managers. In view of the lack of multi-stage dynamic planning model for overseas oil and gas resource structure optimization allocation, based on the operational research theory, according to the resource characteristics of overseas oil and gas projects, a dynamic programming mathematical model is established in this paper, which aims at the allocation of resource structure. It is solved by genetic algorithm, and realized by programming with MATLAB language. This study provides a new way and method for optimizing the allocation of overseas oil and gas resources.
Study on the relationship between internal heterogeneity of single sand body and remaining oil distribution in Pubei Oil Field
Authors: Xu Axian 
Published: September 2020

AbstractAccording to the distribution characteristics of remaining oil in narrow thin sandstone reservoir of Pubei oilfield, the influence parameters such as sedimentary microfacies, structural morphology, effective thickness, rhythm, superposition relation, permeability and variation coefficient are selected, the relationship between Heterogeneous Composite Index and remaining oil distribution is studied by using analytic hierarchy process (AHP). The results show that the area where the heterogeneity index is larger is the main enrichment area of remaining oil. Based on the characteristics of injection and production of single sand body, the cause of remaining oil and the distribution of remaining oil potential, 6 sets of typical well groups and 19 kinds of single sand body injection and production potential countermeasures are optimized to provide a strong basis for fine injection and production of single sand body.
Study on the Control Effect of Sedimentation on Coalbed Methane in Daning-Jixian Area, Ordos Basin
Authors: Niu Haiqing , Han Xiaofeng , Chen Shiyue 
Published: September 2020

Abstract
Daning-jixian area is the main distribution area of Carboniferous-Permian coal-bearing rock series in eastern Ordos basin. the enrichment of coalbed methane in the study area is not only controlled by the modern characteristics of the structure, but also closely related to the buried-palaeogeothermal-hydrocarbon history of coal reservoirs under the control of tectonic evolution, which is an important kinetic factor for coalbed methane enrichment. The characteristics, lithology, lithofacies and spatial assemblages of coal-bearing rocks are controlled by the sedimentary environment, and the multigenerational reservoir-cap assemblage increases the thickness and sealing property of the caprock, so the depositional action is very large It controls the coal reservoir gas material base, reservoir cover combination characteristic and reservoir property, and affects the coal bed methane preservation through the combination relation between coal seam and surrounding rock.
Study on Geological Characteristics of Typical Shale Gas Reservoirs in China
Authors: Liu Qiang , Yao Shangsheng , Ma Lihui 
Published: September 2020

Abstract
shale gas is a kind of natural gas produced from a very low porosity and permeability, dark organic rich shale system. Compared with American shale, Chinese shale has a large amount of brittle minerals, with a brittleness coefficient of 46.15%, North America 38.27%, and China shale ratio as a whole Shale brittleness is better in America. This paper carefully analyzes the geological characteristics of typical shale gas reservoirs in China, analyzes the sedimentary environment and the distribution of organic shale, judges the characteristics of high-quality shale in the “dessert section”, and evaluates the organic pores as the important reservoir space and preservation conditions for shale gas enrichment. Compared with the geological conditions of shale gas reservoirs in North America, the burial depth of China’s marine shale is 1500-5000m, and the best recoverable area of China’s marine shale is located at the structural edge with developed fractures.
Technical Research on Hydrogen Supply Chain Industry
Authors: Xue Fangming , Su Jingcheng , Li Peipei 
Published: September 2020

Abstract
This article compares different types of hydrogen production technology, and it is not advisable to decide which hydrogen production method to use based solely on the production cost of the technology. It is also necessary to consider the local resource situation. The central and western regions are rich in hydropower and natural gas resources, and the prices are relatively low. The natural gas reforming hydrogen production plus distributed electrolysis water hydrogen production technology is a recoverable solution; there are many chemical and iron and steel enterprises in the eastern coast and the Bohai Rim region, and the industrial by-product hydrogen purification technology It is a better choice; there are abundant renewable resources such as photovoltaic and wind energy in Northeast, North China, and Northwest, and can use renewable energy electrolytic hydrogen production technology; Inner Mongolia, Shanxi, Shaanxi and other places have excellent coal resources, and the potential of coal hydrogen production technology is huge. The establishment of the layout of the downstream hydrogen refuelling station and the establishment of the application market are also crucial to the upstream hydrogen production enterprises. Areas where the front-end hydrogen production link and the back-end application link are well integrated can gain a favourable position.
Study on Comprehensive Adjustment Countermeasures of Weak Alkali ASP Flooding in Low Water Cut Period
Authors: Liu Wenjing 
Published: September 2020

Abstract
The problems occurred in the production process of weak alkali ASP flooding industrial demonstration area in Class II oil layer of Block A are systematically analyzed, such as the injection pressure of some injection wells rising too fast, the low energy and low yield of some production wells after ASP flooding, and the water cut rising too fast. Aiming at the problem of time, the research work of comprehensive adjustment was carried out, and the effective ways to improve the test effect were summarized Improve the injection-production relationship of well groups and reduce the plane and interlayer differences; Better development results have been achieved by improving the effectiveness of oil wells.
Continual monitoring technology of the natural ventilation pressure and its application countermeasures in coal mine
Authors: Tong Xiaozhang , Zhou Tao , Ye Chunhui , Yang Yang 
Published: September 2020

Abstract
In order to prevented the adverse effects of natural ventilation pressure vary in coal mines, the paper proposed a method to continual monitoring natural ventilation pressure vary, Dynamic grasp of natural ventilation pressure vary law. According to the relationship of mine ventilation energy, the method was calculated: to a stable ventilation system, meter water column vary Δx is linearly related to natural ventilation pressure vary ΔHN and air volume vary ΔQ. Using this method, the natural ventilation pressure vary in Panyi Mine was measured, the law of natural ventilation pressure vary in PanYi Coal Mine was as follows: The natural ventilation pressure vary periodically within one day, in abnormal weather, the range of natural ventilation pressure vary within one day reached 350Pa, and the range of fluctuation for mine air volume reached 3.2%. The article illustrated the case of local ventilation system instability caused by abnormal vary of natural ventilation pressures through examples, put forward countermeasures to deal with the vary of natural ventilation pressures. The application of continuous monitoring the natural ventilation pressure could quantitatively grasp the natural ventilation pressure vary in real time and provided a reliable basis for formulating the application countermeasures of the natural ventilation pressure vary.
Study on the method of step-up hydraulic fracturing infiltration for soft coal seam
Authors: Qiao Wei 
Published: September 2020

Abstract
In view of the dilemma of the current hydraulic fracturing effect of soft coal seams, based on the existing hydraulic fracturing technology, a model corresponding to the jump pressure and the length of fracture propagation during the stepwise hydraulic fracturing process was constructed, the influence of the elastic modulus of coal and rock mass and the step-up pressure on the crack extension length during crack propagation was analyzed, and a step-up hydraulic fracturing infiltration method suitable for soft coal seam was formed. The research results show that the coal seam has strong stress sensitivity, and in the step-by-step step-up fracturing process, the coal seam cracks expand as the energy potential increases step by step, and they always extend along the direction of the maximum principal stress. The effect of infiltration is very obvious. In the process of fracture propagation, the elastic modulus of coal and rock mass, and the pressure difference of gradual jump have a great influence on the length of fracture propagation, and the initial crack width and crack height have a certain effect on the effect of fracture expansion and infiltration of the gradual jump hydraulic fracturing. The newly proposed step-up hydraulic fracturing and infiltration method can effectively extend the soft coal seam rock mass gradually when the cracks are fully developed, and has a good application prospect.
Neural Network Production Split Model Based on Kriging Interpolation Method and Grey Correlation Analysis Method
Authors: Fu Juyao , Yu Gaoming 
Published: September 2020

Abstract
Oil well production split is an important prerequisite for the efficient development of multi-layered reservoir. Conventional split methods do not consider the synergistic influence of dynamic and static factors related to the oil layer with certain errors. Based on the related dynamic and static parameters of production wells and production data, a neural network split model considering Kriging interpolation and grey correlation method was established. Before the model is established, the involved data is first sorted, and Kriging interpolation is used to complete the data at the appropriate time. Then, the grey correlation analysis method is used to calculate the correlation of the dynamic and static parameters related to reservoir production, and the main parameters of it are extracted. The main parameters are treated as input and substituted into the double hidden layer neural network for modelling, and the resulting model is used to split the production of each layer of the oil well. This method is applied to the production well of the N block of the Y Oilfield. Compared with the conventional method, the accuracy is significantly improved, which is in line with the actual reservoir characteristics.
Numerical simulation research on the gob-side coal pillar width and surrounding rock deformation characteristics
Authors: Deng Ganbo 
Published: September 2020

Abstract
Taking the Gaohe Coal Mine working face gob-side in Shanxi as the research object, the FLAC3D numerical simulation software was used to construct a numerical calculation model to analyze the coal pillar width and the surrounding rock deformation characteristics of the working face gob-side in the mining face during the mining process. The width of the coal pillars along the gob-side was determined, and the change law of the surrounding rock stress and deformation of the roadway with the advancing face was obtained. The research shows that the reasonable coal pillar width along the gob-side in the working face of Gaohe coal mine shall not be less than 36m. With the advancement of the working face, the stress and deformation of the surrounding rock of the roadway gradually increase, and the deformation amount and deformation range of the coal gang are both greater than the corresponding value of the flexible form gang, and the vertical stress of the coal gang is less than the stress of the flexible form concrete gang. The difference in deformation is the main reason for the difference in stress. The results of the study provide a reference for the safety of the gob-side along the coal mine.
Design of surface drainage system in Zhangbei coal mine and forecast of gas drainage
Authors: Wang Bo 
Published: September 2020

Abstract
In order to optimize the design of the surface well extraction system at the 11418-working face of Zhangbei Mine, the gas drainage volume at the 11418 working face of Zhangbei Mine is predicted. Based on COSFLOW numerical analysis, this paper predicts the amount of gas drainage and gas emission from the borehole of the 11218 face in Zhangbei Mine. Through the CFD simulation of the gas distribution law in the goaf of the 11418 face, the layout position of the surface well is optimized. The gas drainage test showed the gas drainage volume of the borehole in the 11418 working face of Zhangbei Mine. The research shows that the use of ground-well extraction technology in the goaf can replace the high-drainage roadway in the roof and reduce the gas drainage intensity of other measures, thereby reducing the engineering cost.
Analysis on the restriction of oil use to environmental protection
Authors: Sun Ping , Li Junpei 
Published: September 2020

Abstract
In recent years, with the rapid development of the economy of various countries and the vigorous development of all walks of life, as one of the main raw materials of the products of major enterprises, the use of oil has also increased, but at the same time, it has caused a lot of repairable and irreparable hazards. This paper expounds the importance of oil for economic development and the current situation of oil, which is also strong. The importance of environmental protection is adjusted. The earth is the home for human beings to survive. The improvement on the natural environment is one of the bases of human survival. The restrictive factors of oil on the implementation of environmental protection policies are listed. After that, I put forward some suggestions, hoping that enterprises or governments can increase business investment in renewable energy, slow down the negative pressure of petroleum on the environment, and promote the harmonious development of human and nature.
Design and Verification of Valve Fire-Resistant Experimental Device
Authors: Xiang Yingjun , Li Jilin 
Published: September 2020

Abstract
The valve plays the role of a switch in the production process of the petrochemical industry, but there are often fire and explosion accidents in actual working conditions. The fire resistance of the valve is the ability of the valve to maintain normal operation in high temperature flames. It is a measure of the safety performance of the valve. Important indicators. This article mainly describes in detail the principle, equipment structure and design schemes of the fire resistance test device. The test of the valve fire test device was successfully carried out. The tests show that the performance parameters of the test device, such as temperature and pressure, meet the relevant requirements of the standard API 607 and API 6FB. Using high-precision sensors and advanced data collectors, it can simultaneously collect data such as pressure, temperature, and leakage. The fire resistance test of the valve was successfully completed, and the problems existing in the test were improved, and the direction of future optimization was proposed.
Optimization of calculation method for natural gas deviation coefficient of tight sandstone gas reservoir in Ordos Basin
Authors: Yang Xiaolong , Wu Yong , Wang Lei , Zhao Yinchen , Zhou Zhedong , An Weibing 
Published: September 2020

Abstract
The deviation coefficient of natural gas is an important parameter in the evaluation of gas reservoir geological reserves and the analysis of pipeline gathering and transportation capacity. For S blocks the status quo, no natural gas high pressure physical properties test data. In the current commonly used deviation based on the analysis of calculation method and the suitable condition, according to the S block formation temperature pressure condition and gas components, using different calculation methods for calculation, the gas deviation factor under different pressure and adjacent regions natural gas high pressure physical properties test results, S block gas deviation factor calculation method for optimization. The research shows that the calculated results of the beggs-Brill method are similar to the test results, and it is appropriate to use the Beggs-Brill method to calculate the natural gas deviation coefficient in Block S.
Discussion on the probiems and treatment methods in the development of aonan low permeability oilfield
Authors: Liu Xingjia 
Published: September 2020

AbstractAlthough the geological conditions of low permeability oilfield are poor and the development is difficult, with the rapid development of China’s economy, the demand for petroleum products is increasing, and the rich oil reserves of low permeability oilfield are attracting more and more attention. This paper discusses the problems existing in the development of Aonan low permeability oilfield, analyzes the main factors affecting the development effect, and discusses how to effectively develop and treat low permeability oilfield.
Data Analysis of Hydraulic Fracturing Pressure in Unconventional Oil and Gas Fields
Authors: Lei Jingchao , Fan Yijun , Li Yueli , Xu Tonghao 
Published: September 2020

Abstract
After the completion of fracturing construction in unconventional oil and gas fields, the phenomenon of water hammer oscillation in the process of pump stopping during fracturing construction will lead to the inaccuracy of reflecting the trend of pressure transformation and increase the difficulty of fracturing effect evaluation in the process of fracturing construction. Therefore, three filtering methods, Savitzky-Golay filter, FFT filter and wavelet transform filter, are used to calibrate the measured pressure in this paper It is found that the method of wavelet transform can achieve the most ideal effect by comparing with the measured data. The field example of well X1 in Ordos Basin proves that the method of wavelet transform can accurately reflect the trend of pressure transformation. This method is of great significance to improve the evaluation of post pressure effect in the process of fracturing construction.