bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study and application of geology-engineering integration technology in tight thin heterogeneous carbonate reservoir
Authors: Yan Jun , Cui Mingyue , He Anle , Liang Chong , Wang Sukai , Zhang Hewen , Wen Xiaohong 
Published: February 2021

Abstract
The marginal block Zana oil field is a typical hard-to-produce carbonate reservoir, thin net pay, poor reservoir physical properties, low pressure, strong heterogeneity, bottom water and gas cap risks coexist, and it is difficult to obtain profitable production in conventional development model. In order to realize its high-efficiency development, research on integrated geological and engineering technology was carried out. First, the static and dynamic data analysis combined with pilot well technology was used to accurately determine the target layer, confirm the material basis and guide the horizontal well orientation optimization; Second, after comprehensive consideration of production, cost, performance feasibility, and management after putting into production, an integrated solution of completion and stimulation was recommended; Third, optimized well trajectory control and cementing quality control, improved the drilling rate of the horizontal section and the cementing quality, created wellbore conditions for subsequent stimulation; Fourth, optimized the stimulation method, the treatment scale and parameters, maximized the stimulated reservoir under the premise of avoiding water and avoiding gas; Fifth, Optimize the formula of acid system and liquid combination system, adopt the gas lift flowing and lift integrated pipe column and assisted technique using coiled tubing and nitrogen, realized rapid backflow in low-pressure wells and reduced the secondary damage of reacted acid. Based on the above research, integrated technology of geological and engineering considered geological, reservoir, completion, and stimulation has been applied 14 wells with a success rate of 100%. The average single well production is 10.7 times that of adjacent wells, the cumulative production exceeded 20 × 104t, achieved significant production and economic benefits, and that all provide a technical reference for the development of similar reservoirs.
Application of EH4 Electromagnetic Imaging System in Goaf detection
Authors: Xu Jiangtao , Yang Zhenwei , Zhang Yaohui 
Published: February 2021

Abstract
During the site selection process of a proposed wind farm, it was found that there was a coal field nearby and there might be a goaf. In order to avoid the goaf of coal mine and eliminate the hidden safety risks brought by the goaf to the construction, geological exploration was needed. After comprehensive consideration, the author chooses EH4 electromagnetic system to probe the research area. Through the practice of wind farm site selection project, it is proved that the detection results are accurate and the method is reliable, which provides reliable reference and effective Suggestions for the later construction of fan station.
Research and Application of Precision Characterization Technology for Numerical Simulation of Side Bottom Water Reservoir
Authors: Li Shujing , Ma Lijie 
Published: February 2021

Abstract
In this paper, according to the technical requirements of accurate characterization of middle and bottom water reservoir model in reservoir numerical simulation, three technical means have been used to solve the difficult problem that puzzles the technicians. The first is to establish a mixture of analytical and numerical water bodies to accurately characterize the side water energy and at the same time to reduce the effective grid to improve the operation speed of the model; the second is to solve the problem of oil reservoir simulation in long time and stratified injection wells. The application of these characteristic technologies has played a good technical support role in the high water cut development period.
Analysis of water Plugging Mechanism of new gel plugging agent
Authors: Nie Xu , Guo Hao , Yan Xu , Du Changpeng , Guo Liqiang , Jin Haibo 
Published: February 2021

Abstract
In this paper, the selective blocking ability of double crosslinking gel plugging agent was tested. The parallel core experiment was conducted by using the fractures with different permeability sizes in the chamber. We investigated the injection of gel in simulated fractures, the liquid distribution ratio, the breakthrough of pressure gradient, water plugging rate, oil plugging rate and erosion resistance with different size fractures. The selective plugging mechanism of double crosslinking gel plugging agent was analyzed.
Discussion on Water Dew Point and Hydrocarbon Dew Point of Natural Gas
Authors: Zou Xiaomei , Huang Fengxia , Zhang Liming , Gele Tumeng 
Published: February 2021

Abstract
During natural gas processing and gathering and transportation, water dew point and hydrocarbon dew point as two of control parameters in natural gas because of safety, economy and efficiency etc. In the field chilled mirror manual visual method always be taken to measure water and hydrocarbon dew point due to online instrument test under a differential condition from the pipeline. For hydrocarbon dew point, there’re some assays have implied that heavier components in natural gas have an important effect on hydrocarbon dew point, at the same time hydrocarbon dew point gained under the pressure between 2MPa~4MPa is equal to the max condensation temperature which has a practical meaning. On the other hand, the retrograde condensation cannot be ignored; for water dew point, application of molecular sieve would make dew point measurement easier, while application of dehydrating agents such as methanol; glycols and glycerol could cause interference, instruments &operators differences are exist, but the changing process is consistent when chilled down temperature. In this case, Attention should be given to a white fog which might appear on the center of the surface of the chilled mirror one or more times while temperature dropping down. At last some suggestions are given from two aspects of processing and measurement of water and hydrocarbon dew point.
Research on Laboratory Experiment of Acidification and Blockage Removal of Coalbed Methane Gas Well in Block M
Authors: Feng Kun , Wang Fenglin 
Published: February 2021

Abstract
The coal reservoir in Block M is the low-permeability coal reservoir, in the process of coalbed gas production, since different degrees of blockage occurs in the fracture and pore of the coal reservoir; as a result, the production of coalbed methane is low or shut down. In this paper, the coal rock reservoir in Block M as the research object, and the acidification and blockage removal acid system was selected, and the acidification and blockage removal effect of the optimal acid liquid was evaluated. The coal core soaking experiment was carried out to test the permeability and porosity of the coal core before and after acidification, the experiment showed that the permeability of the coal core was increased to 1.9 to 15.3 times, and the porosity was increased by 0.25% to 3.56%.
Study on the Impact of Farmland Transfer on the Welfare of Transferring-out Farmers Under the Background of Rural Revitalization in Shanxi
Authors: Zhang Zhenyu , Tian Minghua , Li Jianjun , Wang Fang , Ma Shuang , Wang Jun 
Published: February 2021

Abstract
Under the background of rural revitalization, farmland transfer has become an important way to promote agricultural scale and modern management. While the farmland transfer promotes the concentration of farmland and the transformation of agricultural production methods, what is the impact of farmland transfer on farmers’ welfare? Based on the rural survey data of Xinzhou in Shanxi, this paper used the grey fuzzy comprehensive evaluation method to measure the changes of farmers’ welfare before and after farmland transfer. The study found that the overall welfare level of farmers in three counties of Xinzhou was improved after farmland transfer. The welfare level of farmers was increased by 7.63%, from 0.367 to 0.395. However, the changes in various welfare elements were quite different, and some welfare levels were even declined. After farmland transfer, the welfare distribution gap of farmers transferred out farmland has a tendency to expand.
Experimental Measurement of Oil Shale Permeability and its Influence on In-situ Upgrading
Authors: Chen Xudong , Wang Yiwei , Meng Xianglong , Chen Kankan , Su Jianzheng 
Published: February 2021

Abstract
Oil shale permeability is one of the important parameters for in-situ oil shale production. Increasing oil shale permeability is an important means to improve oil and gas recovery. In the experiment, the oil shale samples were heated to a certain tempera ture, and then its permeability is measured the experimental results showed that the per meability in Maoming area increases first, then decreases, and then increases again. W e established the following oil shale in-situ upgrading model. Based on the measured p ermeability and pyrolysis parameters of oil shale, a mathematical model of in-situ ther mal recovery of oil shale is established. The heating methods include isothermal interm ittent heating and equal heat flow rate heating. The oil and gas seepage migration is ch aracterized by Darcy’s law, in which the permeability is described It is a function of te mperature; increasing the permeability between wells will reduce the heat transfer effi ciency between fluid and rock, increase the heat loss and decrease the production rate.
Effect of Particle Size on Mechanical Properties of Coarse-grained Soil
Authors: Gong Chaofan , Cao Zhixiang , Song Xinwei , Zhang Lingjie , Yuan Shifang 
Published: February 2021

Abstract
In order to explore the effcet of particle size on the mechanical properties of coarse-grained soil, 40 groups of direct shear tests were conducted on 3 kinds of coarse-grained soil with the same dry density by DHJ50-2 shear test machine. The results show that the cohesive forces decreases with the increase of particle size, and the internal friction angle increases with the increase of particle size. Under low density and low vertical load, the peak shear stress of coarse-grained soil decreases with the increase of particle size. The threshold porosity of 3 kinds of coarse-grained soil was calculated. When the porosity of soil sample is lower than the corresponding threshold porosity, the peak shear stress increases with the increase of particle size. The research results have certain significance for the follow-up study of mechanical properties of complex graded soil.
Application and Discussion of Reserve-production Balance Coefficient in Oilfield
Authors: Ren Lei 
Published: February 2021

Abstract
The reserve-production balance coefficient is the ratio of the annual increase in recoverable reserves to the annual oil production, also known as production reserve replacement ratio. What is the relationship between the index and the stable production of oilfield? How to use the index to predict the stable production ability of oilfield? When the annual increase in recoverable reserves is greater than the annual oil production, it can only mean that the resource base is further strengthened, but whether the annual oil production in the following year can be kept stable or increased, it also depends on the ability of new recoverable reserves to be converted into annual oil production and the magnitude of the decline rate of the previous year’s annual oil production. Based on the analysis of the critical value of stable production of the reserve-production Balance Coefficient, this paper discusses how to apply the reserve-production Balance Coefficient in oilfield development, and when the reserve-production Balance Coefficient reaches what critical value, the annual oil production of an oil field can be stabilized or increased in the next year.
An Oil and Gas Big Data Sharing Model Based on Blockchain Technology
Authors: Wang YuYan , Huang Shujun , Yu Xiang 
Published: February 2021

Abstract
With the continuous in-depth application of new technologies such as big data and Internet of Things in the oil and gas field, the scale and value of oil and gas data continue to rise, laying the foundation for oil and gas big data sharing. Oil and gas big data sharing can effectively integrate different data sources and break the dilemma of “data islands” where data in the oil and gas field are separated from each other. However, there are problems in actual practice such as (1) difficulties in trust among different government departments, scientific research institutions and enterprises, (2) insufficient data privacy protection, and (3) weak data traceability. In response to the above problems, this article proposes a model of oil and gas big data sharing based on blockchain technology. We build a blockchain for oil and gas big data sharing alliances to secure oil and gas big data by utilizing the decentralization and non-tampering characteristics. We also provide supports for oil and gas big data sharing by controlling data access strictly based on the smart contracts. The evaluation and analysis results show that this model makes oil and gas big data more secure and authoritative compared with the traditional centralized sharing method.
Design and Application of Intelligent Monitoring and Identification System in Coal Mine
Authors: Ma Long , Chen Qing 
Published: February 2021

Abstract
In order to speed up the construction of smart mines, aiming at the problems of inspection and monitoring of important equipment such as belt conveyor and water pump room in coal mines, an intelligent monitoring and identification system for coal mines was developed, and its composition and realization functions were introduced. The system integrates the functions of data collection, video monitoring, intelligent analysis and fault alarm, and intelligently monitors the underground production site and large-scale equipment, realizing unattended operation, which provides powerful support for digital mine construction.
Pilot test of the low temperature SCR technology in cement plant
Authors: Liu Huaiping , Fang Jingrui , Li Junhua 
Published: February 2021

Abstract
The low temperature selective catalytic reduction (SCR) was used for deep De-NOx in a cement kiln. The SCR pilot plant with a flue gas of 10000 m3/h was designed and constructed. To meet the emission standard, selective non-catalytic reduction (SNCR) technique was carried out and the concentration NOx in flue gas was ca. 270mg/m3. The De-NOx efficiency of SCR decreased with the increase of space velocity and exceeded 77.7% without the ammonia injection. When space velocity was 2500h-1, the de-NOx efficiency of SCR has been further improved by the addition of ammonia injection. After a long time of test, it suggested that the proposed De-NOx technology scheme could stably and effectively control the NOx emission in flue gas, and could meet the ultra-low emission standard.
Study on The Effect of Humic Acid on The Migration Distance of Wetting Front During Water Infiltration
Authors: Jing He 
Published: February 2021

Abstract
Humic acid is widely used at this stage, and studying the influence of humic acid on the transportation distance of wet front in the process of soil water infiltration is helpful to agricultural production. Orthogonal test table L16 (45) was used to design the test plan. Three test factors, humic acid, soil bulk density, and initial soil moisture content, were selected, and four levels were selected for each factor for experimental research. The test results show that all three factors have an impact on the distance of the wet front migration, but humic acid has the largest and most obvious impact.
Analysis of Volatile Components in Baihaoyinzhen white tea co-fermented with Vanilla and Citri Grandis Exocarpium by HS-SPME-GC-MS
Authors: Huang Baiqi , Wu Juxian , Wu Xiaorong , Shi Xiaoyan , Lin Haohao , Chen Haibin 
Published: February 2021

Abstract
Flavor, bioactivity, and commercial value are different in various kinds of tea. To improve the aroma and quality of Baihaoyinzhen white tea (BHYZ), different BHYZ was prepared by co-fermented with Vanilla (BHYZ-V) or Citri Grandis Exocarpium (BHYZ-C). The results showed that the volatile components of BHYZ were significantly changed after co-fermented, when HS-SPME-GC-MS was used for analysis. Thirty-nine, thirty-eight, and forty-four volatile compounds were identified by MS similarity in BHYZ, BHYZ co-fermented with Vanilla and BHYZ co-fermented with Citri Grandis Exocarpium (CGE), respectively. The volatile components in BHYZ-V with high content were similar to the BHYZ, but the content of most components increased. However, twenty-eight volatile components were only found in BHYZ-C, of which the predominant aroma compounds were D-limonene (39.28%), γ-terpinene (9.03%), 2,2,4-trimethyl-1,3-pentanediol diisobutyrate (8.51%), linalool (7.25%), and germacrene D (4.61%). The results indicated that CGE enhanced aroma characteristic of BHYZ rather than Vanilla, which would be a feasible way to improve the quality of BHYZ.
Life Cycle Assessment (LCA)-based study of the lead-acid battery industry
Authors: Gao Tao , Hu Lidan , Wei Mengxiao 
Published: February 2021

Abstract
Lead-acid batteries are the most widely used type of secondary batteries in the world. Every step in the life cycle of lead-acid batteries may have negative impact on the environment, and the assessment of the impact on the environment from production to disposal can provide scientific support for the formulation of effective management policies. A study was conducted on a lead-acid battery company using the life-cycle assessment method. The evaluation method of CML2001Dec07 provided by Gabi5 software was used to calculate and analyze the list, and the results showed that the environmental impact of the final assembly and formation stage was the greatest, among which, the most important type of environmental impact was the contribution of non-living resource consumption.
Study on the technical method of linking environmental impact assessment of park planning with emission permit based on total emission control of pollutants
Authors: Huang Lihua 
Published: February 2021

Abstract
This paper proposes that the park should be regarded as the key unit of total pollutant control and allocation in China. In order to improve the environmental quality of the park, the technical path of linking the environmental impact assessment of the park planning with the emission permit is studied. It includes target estimation of total pollutant control, total pollutant allocation technology, linkage of total pollutant control index, etc. Put forward suggestions for system optimization. It provides a useful reference and reference for the research and improvement of China’s planning EIA system and emission permit system.
Air quality perception satisfaction and influence factors analysis in Shandong, China
Authors: Zheng Yan , Sun Yong , Ji Min , Zhang Xin 
Published: February 2021

Abstract
With the development of the economy and the improvement of the quality of life, people’s sensitivity and the willingness to the air quality have also increased. In order to analyze the public’s perceived satisfaction with air quality, this paper processed and cleaned up the data of more than 20,000 air pollution complaints in Shandong Province, and calculated the air quality perceived satisfaction by constructing an emotional words library in the field of air quality. Based on the calculation results of air quality perception satisfaction in Shandong Province from 2017 to 2018, and then combined with IoT monitoring data, industrial development level and GDP data, the factors affected air quality perception satisfaction were analyzed. The results show that: (1) The public’s perceived satisfaction with air quality is not directly related to the concentration of objective pollutants in the air. (2) In areas where industrial enterprises are densely distributed, the perceived satisfaction with air quality tends to be worse. (3) In cities with high levels of economic development, the public’s perceived satisfaction with air quality tends to be worse.
Adsorption behavior and mechanism on U(VI) from aqueous solutions by polydopamine-modified titanate nanotubes
Authors: Zuo Yangyang , Li Ye , Hu Juntao , Liu Shuang 
Published: February 2021

Abstract
In this work, uniform polydopamine (PDA) layers by self-polymerization of dopamine were successfully coated around titanate nanotubes (TNTs) to enhance its adsorption ability. The polydopamine-functionalized titanate nanotubes (PDA-TNTs) exhibited outstanding U(VI) adsorption capacity (247.53 mg/g) and rapid adsorption efficiency. The nitrogenous groups and phenolic hydroxyl groups of PDA coordinating with UO22+ was dominant, while ion exchange between Na+/H+ and U(VI) was of secondary importance. Besides, the introduction of PDA significantly alleviated the competitive adsorption between U(VI) and coexisting metal ions, making it possible for PDA-TNTs to be an effective sorbent to remove U(VI) in radioactive wastewater.
Adsorption performance of biochars from agricultural and forestry wastes
Authors: Ren Xiaoli , Tan Ying , Lai Xuehui , Zhu Kaijin 
Published: February 2021

Abstract
Four types of biochars were prepared by using sawdust, corn straw, peanut hull and fallen leaves as materials, respectively. The characteristics of four types of biochars were analyzed by SEM, FTIR and BET, the SBET of SDC, PHC, CSC and FLC were 1168.45, 846.95, 825.51 and 401.26m2·g−1. The adsorption conformed to the pseudo-second-order model and the Langmuir isotherm.
Research on Climatic Influencing Factors of Low Temperature Cracking Index of Asphalt Pavement in Cold Area
Authors: Gao Hui , Xu Bo 
Published: February 2021

Abstract
According to the current Chinese standards, the prediction model of asphalt mixture low-temperature cracking index does not consider the influence of climatic factors on the performance of pavement materials and low-temperature stress. This paper analyzes the influence of cooling conditions and long-term aging in cold areas on the low-temperature damage of pavement. It is proposed that the prediction model of asphalt mixture low temperature cracking index is a function model that changes with time. It is necessary to consider parameters such as cooling rate and creep rate attenuation index to correctly predict the low temperature cracking condition of roads within the service life.
Limestone-Gypsum Wet Flue Gas Desulfurization Wastewater Treatment
Authors: Ni Tingting , Wang Yunzhong , Huang Chenghui , Jiang Dongsheng , Liu Qingyu 
Published: February 2021

Abstract
In this paper, chemical precipitation process is used for the treatment of the desulfurization wastewater generated by the waste gas treatment system of the limestone-gypsum flue gas desulfurization process of a thermal power plant. After one year of operation, the technology is reliable and stable. The removal rate of suspended matter, COD, fluoride, mercury and sulfate reached 99.5%, 98.3%, 87.5%, 99.8% and 85.6% respectively, and the corresponding effluent concentrations were 54 mg/L, 20 mg/L and 9.6 mg/L, 0.04 mg/L, 980 mg/L. Finally, the effluent quality of the system is better than the discharge requirements of “Discharge standard of wastewater from limestone-gypsum flue gas desulfurization system in fossil fuel power plants” (DL/T997-2006). In addition, the total electricity and chemical charges per ton of wastewater treatment were 6.50 yuan, which is lower than most of the engineering project under the same discharge requirements. Therefore, the process has certain engineering advantages.