bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on All-Vanadium Redox Flow Battery Energy Storage Device Based on Energy-Saving and Environmentally-Friendly New Energy Power Station Interface Technology
Authors: Wang Yanan 
Published: February 2021

Abstract
In the context of energy conservation and environmental protection, new wind energy power generation has obvious random, intermittent, uncontrollable and anti-peak-shaving characteristics. The large-scale grid connection of wind power has brought grid peaking and stable and safe operation the huge pressure has caused more serious wind curtailment and power rationing, which has seriously affected the effective use of wind resources and economic benefits. Under the dispatch of the energy management system, the all-vanadium redox flow battery energy storage power station smooths the output power of wind power generation, and cooperates with the wind farm power forecast system to improve the wind farm tracking planned power generation capacity and improve the grid-connected power quality of the wind farm. Based on this, the thesis studied the external operating characteristics of the all-vanadium flow battery (VFB) energy storage system, and carried out the modeling and simulation of the energy storage system (ESS) based on the electrochemical properties of the VFB. Systematically analyse the actual operating data of the energy storage system and evaluate the impact of its overload operation on dispatch control, and fit key parameters such as state of charge (SOC), electromotive force and equivalent resistance, and obtain functional relationships.
Research on the law and characteristics of gas products during coal heating and oxidation
Authors: Qin Muguang 
Published: February 2021

Abstract
In order to explore the comprehensive indicator gas indicators suitable for the fire prevention and extinguishing work of Chaohua Coal Mine 22012 working face, the gas product law during the heating and oxidation process of coal in the 22012 working face was experimentally studied by using the coal spontaneous combustion gas product simulation test device. The index system for predicting and forecasting the indicator gas of coal spontaneous combustion in 22012 working face was obtained. The research results show that: CO can be used as an index gas for predicting and predicting coal spontaneous combustion, and olefin gas C2H4 can be used as a marker gas for predicting and predicting spontaneous combustion of coal, and the predicted critical temperature of C2H4 is about 110°C. C2H4/C3H8 can be used as an auxiliary indicator for judging the spontaneous combustion process of coal, and the law of ratio change can only be applied after the C2H4 and C3H8 gases appear at the same time. C2H2 and the alkane ratio C2H6/CH4, C3H8/CH4, C3H8/C2H6 are not used as the indicator gas indicators for prediction and prediction of coal spontaneous combustion at Chaohua Coal Mine 22012 working face.
Drivers of Water Resources Carrying Capacity and Changes due to Climate Change in China
Authors: Wang Yifan 
Published: February 2021

Abstract
With basic knowledge of global sustainable development, water resources carrying capacity (WRCC) relates closely to society, economy and environment. It has important affection on the knowledge and construction of water resources security system. Based on most updated international and national research outcomes on drivers of WRCC and future changes due to climate change, this paper collects and summarizes the theory and drivers of WRCC, as well as water resources and sustainable development, water sources-society-environment coupling system and trends of water cycle in a changing climate representing by the drivers of WRCC. With an overall understanding of water sources carrying capacity, this paper analyzes the evaluation methods of WRCC study, including the system dynamics theory, the decision model with multiple factors and so on. Finally, this paper concludes the current problems of water resources representing by WRCC.
Implement quality control of roadbed pressure in highway engineering
Authors: Lei Puchun 
Published: February 2021

Abstract
In daily life, highways are the most common public facilities and are closely related to people’s travel. Therefore, various management departments must pay attention to strictly supervise the quality of each construction link of highway engineering, especially in accordance with the requirements of relevant standards, do a good job of quality control of highway subgrade compaction. This article first analyzes the factors affecting the quality of roadbed pressure in highway engineering, and proposes targeted quality control measures, hoping to provide a reference for the improvement of my country’s highway engineering construction quality.
Au@Gqds@Ptxbi Nano-Dendrites Endows Alkaline Methanol Highly Electro-Catalytic Activity and Stability
Authors: Li Jinling , Zhang Qiankun , Shao Tao , Zhang Dongxia , Zhou Xibin 
Published: February 2021

AbstractIn this work, we put forward a simple and green strategy to design and synthetic a highly efficient Au@GQDs@Pt3.5Bi nano-catalyst with a novel nanostructure composed of an Au@GQDs core and Pt3.5Bi alloy shell. This material showed outstanding catalytic capability for the oxidation of methanol (MOR) than that of the commercial Pt/C catalyst. The sequence of the mass activity was arranged to be commercial Pt/C (0.29 A mgPt−1) < Au@Pt3.5Bi (1.6 A mgPt−1) < Au@GQDs@Pt (1.81 A mgPt−1) < Au@GQDs@Pt3.5Bi (17.45 A mgPt−1). The outcomes ascribed to the unique core-shell structure with dendrites, interior electronic and synergistic effect with Bi and Pt. This work enlightens on the delicate proposal of novel core-shell nano-material for improving the electro-catalytic performance of MOR.
Research of complex fracture acid fracturing technology in low permeability carbonate reservoir
Authors: Zhang Xudong , Zhou Jun , Yao Yiming , Wang Jianqing , Wang Dong 
Published: February 2021

Abstract
Based on the analysis of the characteristics of the low-permeability carbonate reservoir, this paper has carried out studies on the adaptability of geological conditions, the adaptability of rock mechanics conditions and the characteristics of horizontal stress of the reservoir, etc., and demonstrated the feasibility of the acid fracturing of the low-permeability carbonate reservoir with complex fractures. In view of the poor connectivity of low-permeability carbonate reservoirs and the unsatisfactory effect of conventional acid fracturing, a “large scale + high pump rate” process idea of complex fracture acid fracturing technology was formed through the simulation of process parameters and optimization of construction pipe string, so as to expand the reservoir stimulation volume and improve the communication scope.
Support vector machine is used to establish the oil production model of polymer flooding in the Class-II reservoir
Authors: Chen Kai 
Published: February 2021

Abstract
According to the problems of different oil production curves, complex influencing factors and difficult production prediction in different blocks of the Class-II Reservoirs in D Oilfield, a staged oil production prediction model is established according to the corresponding relationship between the advancing theory of polymer flooding wall and the dynamic change characteristics of oil production. In the process of solving the model, by introducing the support vector machine method, Twenty-eight groups of model parameters and influencing factors in the developed blocks are selected for learning and training, and six groups of data samples are tested for prediction. Finally, the nonlinear fitting relationship between the model parameters and influencing factors is determined, and the whole algorithm process is compiled into a simple application program. The field application shows that the prediction accuracy of the new model is over 95%, which is convenient for tracking and debugging, and can fully meet the requirements of compiling the polymer flooding development scheme of the Class-II reservoir and the medium-and long-term planning scheme of the oilfield.
Construction and application of gas emission feature outburst early warning system in working face
Authors: Deng Ganbo 
Published: February 2021

Abstract
In order to realize the accurate early warning of coal and gas outburst in Xinyuan Coal Mine, the early warning system of coal and gas outburst based on the dynamic characteristics of gas emission is constructed by using the dynamic characteristics of gas emission. The results show that the outburst early warning system based on the characteristics of gas emission can realize the real-time and dynamic early warning of the outburst danger of the working face of Xinyuan Mine, and the early warning accuracy is up to 79%, which ensures the daily safety production of Xinyuan Mine.
A Model for the Deposition of Scale Crystals on the Surface of Clay Particles
Authors: Yu Tao , Song Jiayu , Yan Yan , Wu Baichun , Qu Chengtun 
Published: February 2021

Abstract
Deposition and aggregation of scale on microbial surface leads to poor stabilization of the treatment of oilfield high-scale oily wastewater. To study the deposition characteristics of scale on the surface of microbial particles, we perform the deposition and aggregation of calcium sulfate on the surface of clay particles as simulators of microbes and establish the deposition-aggregation process model. According to the theory of crystal growth, the diffuse electric double layer theory for clay, and the charged colloid theory, the scale deposition model can be divided into induction period, formative period of scale crystal nucleation, and crystal growth period. When calcium sulfate crystals deposit and aggregate on the surface of clay particles, the zeta potential and the average particle size on the surface of the clay particles increase continuously over time and tend to increase and decrease in cycles. The scale crystals are wrapped divergently around the surface of the clay particles in a needle-like form, such that the clay suspension is in a state of high aggregation. Logarithmic value of the conductivity in the formation of scale crystal has a good linear relationship with time, which conforms to the first-order rate equation. Conductivity curves can better reflect the deposition course of scale crystal on the surface of clay particles, which is divided into the induction period (6 min), transition period (1.5 min), formative period of scale crystal nucleation (10.75 min), rapid growth period of scale crystal (8.5 min), slow growth period of scale crystal (14.75 min), and stationary phase (4.75 min), and with the formation of the scale crystal, the deposition rate constant decreases gradually from 0.00945 min−1 to 0.0001 min−1. The results uncovered that Deposition and aggregation rules of scale on the surface of clay particles and the basis for further studying on microbial surface.
Research Progress of Structural Health Monitoring Based on BIM Technology
Authors: Zhou Meiyu , Zhao Peng , Ren Hongwei , Shi Fengjiao , Feng Hao , Qin Lei 
Published: February 2021

Abstract
Structural health monitoring technology is one of the effective means to ensure the reliability of the structure, it is of great significance to the subsequent operation and maintenance of the structure to detect and identify the deterioration and damage of the structure during the service period, and realize the early warning and dynamic evaluation of the structural safety. Under the background of the rapid development of computer and other information technology, BIM technology is increasingly used in the field of structural health monitoring because of its good coordination, simulation, optimization, visualization, and graphing characteristics. This paper expounds and analyzes the research and application of structural health monitoring technology, BIM technology and structural health monitoring system based on BIM technology, and points out the technical and application problems that need to be solved urgently in the development of this field.
Research on the Effect of Uneven Proppant Settlement on Well Productivity in Stimulated Reservoir
Authors: Hou Tengfei , Cheng Changkun , Qiao Yan , Wan Youyu , Xiong Tingsong , Liu Shiduo , Zhang Yang , Ye Yu , Guo Bin , Wang Guoqing , Xie Guiqi , Liu Youming 
Published: February 2021

Abstract
The characteristics of proppant tarnsportation, settlement and distribution in fractures are of great significance to the effectiveness of complex fractures, as well to investigate the shale reservoir stimulation volume and productivity evaluation. This paper studies the effect of the uneven distribution of proppant sand banks on well productivity. A numerical model that comprehensively considers adsorption, desorption and stress sensitivity, and characterizes different settlement degree of proppant sand banks is established. The pressure distribution and productivity characteristics of fractured reservoir considering proppant non-uniform distribution are studied, by comparative analysis of different sand bank shapes, main fracture conductivity, reservoir matrix permeability and other sensitivity parameters. Meanwhile, the main controlling factor that affects the productivity of horizontal wells after the formation of sand banks are obtained. The results show that the proppant settlement greatly reduces the productivity. The effect of fracture conductivity on well production could ignore when the fracture conductivity is more than 4 μm2·cm in specific fractured reservoir. It is recommended to use small particle size proppant (100 mesh) to propped natural fractures or induce fractures. The higher the matrix permeability, the greater the impact of proppant settlement on well productivity. Beisdes, the measurement to prevent proppant settlement should be taken in high permeability zones. Considering the influence of proppant uneven settlement in complex fractures is of great significance for evaluating well productivity and guiding on-site fracturing operations.
Study on Well Selection and Layer Selection for Fracturing Production in Extended Well Area of Block A
Authors: Xu Guoqing 
Published: February 2021

Abstract
Fracturing reform plays an important role in improving the development effect of peripheral low permeability reservoirs, and fracturing put into production is the key to ensure the completion of productivity tasks at the initial stage of production. In 2012, an oilfield expanded drilling in Block A with good reservoir physical properties. In order to ensure the initial productivity, compare the fracturing production effect of the production well areas and the problems in the development process, and optimize the fracturing production well layers in the expanded well areas in combination with the geological conditions of the well areas themselves.
Analysis of Velocity dispersion and Attenuation in Double-scale Model
Authors: Zhou Dan , Sun Zhentao 
Published: February 2021

Abstract
In the two states of oil-gas and water-gas, the wave velocity and attenuation coefficient are numerically simulated by double-scale model. The P-wave velocity and attenuation coefficient curves show double-step and double-peak, respectively. With the increase of gas saturation, the velocity step of mesoscopic scale gradually decreases and disappears. The attenuation peak decreases and the characteristic frequency shifts to high frequency until it coincides with the characteristic frequency of the micro-scale. The superposition of the attenuation peak makes the total attenuation peak increase. And there is a great difference in fluid properties when oil, gas and water are mixed in the reservoir, so the double-scale model can better predict the fluid saturation in the reservoir and better monitor the fluid.
Discussion on the factors affecting the pump efficiency of screw pump
Authors: Fan Dongkai 
Published: February 2021

Abstract
Since the invention of screw pump in 1930, screw pump technology has been continuously improved and perfected, especially the development of synthetic rubber technology and bonding technology, which has made screw pump widely used in oil exploitation. Screw pump wells have the characteristics of low investment, high pump efficiency and energy saving. At present, screw pump has become a common artificial lifting method in oil fields using polymer flooding. In view of the present situation that screw pump wells are used for oil production more and more in Liuchang area, this paper discusses how to improve the production efficiency of screw pump wells in field production to promote the development of oil fields.
Characteristics of Chang 7 shale in Qingyang area, Ordos Basin
Authors: Li Zhenhua , Cao Feng , Zhang Suya 
Published: February 2021

Abstract
Chang-7 shale is the most important source rock of Mesozoic in Ordos Basin. The characteristics of Chang 7 shale in Longdong area of Ordos Basin are analyzed from the aspects of shale thickness, distribution, sedimentation, petrology and organic geochemistry. The results show that the shale in the study area is mainly distributed in the middle and lower part of Chang-7 member. The shale is mainly composed of deep lake and semi deep lake facies, with a thickness of 10m-40m and good horizontal continuity. The lithofacies are mainly black shale facies, laminated mudstone facies and silty mudstone or silty mudstone facies. The organic matter abundance is high, and the types of organic matter are mainly type I and type II, and they are in the mature evolution stage It has good oil-bearing property. In tight oil accumulation, shale is not only an important material source, but also provides an important reservoir forming power. Only with the existence of shale, can oil form industrial reservoir.
Fine numerical simulation of deep carbonate gas reservoir in northwest Sichuan
Authors: Liu Yicheng , Gong Yufeng , Wang Junjie , Lan XueMei , Zhang Lianjin , Liu linqing 
Published: February 2021

Abstract
Qixia Formation in northwest Sichuan has a complex structure, ultra-deep burial, high temperature and high pressure, thin reservoir and fractures development, and it is difficult to simulate the gas reservoir numerically. Based on existing geological understanding, in this paper, the tracking attribute parameters of three-dimensional seismic data bodies are optimized by ant tracking technology. Through the automatic extraction crack system of differential bodies, a three-dimensional geological model considering natural fractures is established. Using embedded discrete cracks and MRST numerical simulation open-source program, a numerical simulator of deep carbonate gas reservoirs in northwest Sichuan has been formed, and the development mechanism of Qixia Formation in northwest Sichuan is demonstrated. The research work in this paper has a certain theoretical guiding significance for the efficient development of deep carbonate gas reservoirs in northwest Sichuan.
Characteristics of paleogeothermal field and its influence on hydrocarbon accumulation in Qingyang area
Authors: Li Zhenhua , Zhang Suya 
Published: February 2021

Abstract
Geothermal field has an important influence on hydrocarbon accumulation. The geotemperature field in Qingyang area is studied by vitrinite reflectance and homogenization temperature of inclusions. The results show that the average geothermal gradient in Qingyang area is about 2.8 °C/100M, which is close to the median value of global average heat flow. It belongs to the medium temperature type geothermal field. In Qingyang area, the geothermal gradient is low from Paleozoic to early Cenozoic, ranging from 2.2 °C to 3.0 °C/100M, rising to 3.3-4.3 °C/100m in the late Mesozoic, and gradually decreasing to 2.8 °C/100M since Cenozoic. Generally speaking, high temperature field is favorable to the formation of petroleum system, and vice versa.
Research on Formation Prediction Model of Gas Hydrate
Authors: Lin Jianwei 
Published: February 2021

Abstract
In the process of gas extraction, gathering and transportation, etc., the formation of hydrates will cause blockage of mining facilities and pipelines and affect normal production, and even there are hidden dangers, causing difficulties in gas development. Therefore, the building of the hydrate prediction model is an urgent problem to be solved in the prevention and control of hydrate; it plays an important role in accurately and efficiently predicting the specific position and time of hydrate formation. In this paper, The formation mechanism and conditions of gas hydrate were described, and the prediction models of hydrate were introduced from two aspects: whether there are inhibitors (alcohols and electrolytes) in the hydrate system, respectively, the VdW-P model, a series of thermodynamic models based on it, and Chen Guo model based on hydrate dynamics were mainly described. Under different application conditions, the appropriate prediction model can effectively predict the formation of hydrate.
Analysis of Diagnostic Fracture Injection Tests for Shale Gas Wells
Authors: Chen Man , Jiang Xuemei , Zhang Jing , Gao Shangjun , Feng Xingzheng , Yang Hai 
Published: February 2021

Abstract
Formation pressure estimation of shale gas wells is one of the key factors affecting production prediction of gas wells, and diagnostic fracture injection test analysis is an important means to accurately obtain formation pressure parameters. In this paper, through the establishment of shale gas well diagnostic fracture injection test model, taking ChangNing shale gas field as an example, the actual test data of pre-production gas wells are fitted. Then analysis the change law of pressure transient curves and the model fitting results with conventional analysis method comparing with the results - G function diagnosis curve method to explain, optimizing fracture closure point selection mode, this paper proposes a new method to determine fracture closure point: when G derivative curve begins to deviate from the initial linear trend, correct selection of closed point, to obtain accurate formation pressure coefficient, formation pore pressure of reservoir parameters such as reservoir. At the same time, the improved method is used to evaluate the reservoir parameters of the actual gas wells in ChangNing, providing theoretical guidance for the subsequent fracturing construction and production.
Current status and prospects of coal and gas outburst prediction and prevention technology
Authors: Deng Ganbo 
Published: February 2021

Abstract
Predicting the sensitivity index accurately is an important prerequisite for the current status and future development of coal and gas outburst prediction technology. Technical operators and researchers must briefly analyze the traditional coal and gas outburst prediction and prediction methods. On this basis, optimization techniques and analysis methods, including mathematical and physical theories, databases, data mining and other information technologies, GIS technology, three-dimensional geological simulation technology, radio wave perspective detection technology, etc., can ensure the better development of this work. Different technical methods can be configured in combination with different usage scenarios to ensure satisfactory usage effects.
Characteristics of rock damage variable under cyclic loading
Authors: Wu Yunfeng 
Published: February 2021

Abstract
In order to study the mechanical characteristics of rock under dynamic load, shock and P-wave velocities were measured by split Hopkinson (SHPB) testing system and NM-4b non-metallic ultrasonic testing analyser. In the test, the specimens were subjected to single impact with different air pressure and cyclic impact with the same air pressure. Acoustic velocity was measured before and after impact to observe the morphological characteristics of rock samples after impact. The results show that: under different air pressure, the rock fracture morphology is closely related to the air pressure. The higher the air pressure, the greater the peak strength of the sample, the more concentrated the damage range to the center of the sample; The results show that the peak stress decreases, the cumulative damage increases and the wave velocity decreases with the increase of cyclic impact times.