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Height of interconnected fracture zone based on the impact of rock fragmentation and bulking Energy Explor. Exploit. (IF 1.382) Pub Date : 2021-01-12 Fuzhu Wu; Yannan Wang; Shouqiao Shi; Zhaoqun Zhu
The Jurassic coal fields in western China are characterized by thick coal seams and weak overburden. The height of an interconnected fracture zone (HIFZ) is often abnormally high for fracture zones produced by coal seam mining. In this paper, HIFZ is discussed through theoretical analysis, in-situ investigation, and data fitting with regression analysis. A comparison of two calculation methods in this
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Quantitative determination of organic adsorption capacity in the Palaeozoic shales from South China Energy Explor. Exploit. (IF 1.382) Pub Date : 2021-01-12 Sibo Wang; Zhiguang Song; Jia Xia; Yuan Gao; YaoPing Wang; Taotao Cao
In this study, the methane adsorption capacity of kerogen isolated from the Cambrian, Silurian, and Permian shales and the impact of soluble organic matter (SOM) on the adsorption capacity of these shales were investigated. The results reveal that 1) the adsorption capacity of kerogen varies in a broad range, from 14.48 to 23.22 cm3/g for the Cambrian kerogens, from 15.50 to 36.06 cm3/g for the Silurian
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Effect of viscosity on oil recovery by spontaneous imbibition from partially water-covered matrix blocks Energy Explor. Exploit. (IF 1.382) Pub Date : 2021-01-12 Qi Zhang; Xinyue Wu; Yingfu He; Qingbang Meng
Spontaneous imbibition is an important mechanism of oil recovery from fractured reservoirs and unconventional reservoirs. Oil is produced by combining co- and counter-current imbibition when the matrix blocks was partially covered by water. In this paper, we focused on the effect of viscosity ratios on oil production by spontaneous imbibition and established the numerical model for one-dimensional
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Fracture criterion of basic roof deformation in fully mechanized mining with large dip angle Energy Explor. Exploit. (IF 1.382) Pub Date : 2021-01-11 Ke Yang; Zhen Wei; Xiaolou Chi; Ansen Gao; Qiang Fu
To explore the structure evolution of overlying strata and pressure characteristics of coal mining with large dip angle, the basic roof mechanical model was established that based on the thin plate theory and the development characteristics of 1212 (3) working face of Panbei Mine. The formula was deduced that used for calculating the basic roof stress distribution in large dip angle coal seam. It revealed
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Pore structure and adsorption hysteresis of the middle Jurassic Xishanyao shale formation in the Southern Junggar Basin, northwest China Energy Explor. Exploit. (IF 1.382) Pub Date : 2021-01-07 Bo Liu; Yifei Gao; Kouqi Liu; Jinzhong Liu; Mehdi Ostadhassan; Tong Wu; Xianli Li
In order to understand the pore structures of the Middle Jurassic Xishanyao Formation in the Junggar Basin, 11 shale samples from a single well were picked and were subjected to several analyses including mineralogy, (programmed) Rock-Eval pyrolysis for geochemical and N2 adsorption for pore structure analysis. The results showed that the mean value of total organic carbon (TOC) content of these samples
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Study on the regional characteristics during foam flooding by population balance model Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-29 Zhongbao Wu; Qingjun Du; Bei Wei; Jian Hou
Foam flooding is an effective method for enhancing oil recovery in high water-cut reservoirs and unconventional reservoirs. It is a dynamic process that includes foam generation and coalescence when foam flows through porous media. In this study, a foam flooding simulation model was established based on the population balance model. The stabilizing effect of the polymer and the coalescence characteristics
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The green economy and inequality in Sub-Saharan Africa: Avoidable thresholds and thresholds for complementary policies Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-26 Simplice A Asongu; Nicholas M Odhiambo
The study examines nexuses between carbon dioxide (CO2) emissions, renewable energy consumption and inequality in 39 Sub-Saharan African countries for the period 2004–2014. The empirical evidence is based on Quantile regressions. First, in the 25th quantile of the inequality distributions, as long as CO2 emissions metric tons per capita are kept below 4.700 (4.100), the Gini coefficient (Atkinson index)
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Evaluation of the hydrocarbon generation potential of the Pimenteiras Formation, Parnaiba Basin (Brazil) based on total organic carbon content and Rock-Eval pyrolysis data Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-25 Agostinho Mussa; Wolfgang Kalkreuth; Ana Maria Pimentel Mizusaki; Marleny Blanco González; Tais Freitas da Silva; Marcos Müller Bicca
The Parnaiba Basin is a Paleozoic to Mesozoic intraplate volcano-sedimentary basin where the Pimenteiras Formation (Devonian) is the main sequence with potential of hydrocarbon generation, mostly natural gas. The present paper evaluates the potential of hydrocarbon generation of Pimenteiras Formation based on Total Organic Carbon (TOC) and Rock-Eval pyrolysis parameters. In this work, 1077 shale samples
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Geochemistry and shale gas potential of the lower Permian marine-continental transitional shales in the Eastern Ordos Basin Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-18 Jingyi Wei; Yongli Wang; Gen Wang; Zhifu Wei; Wei He
Marine–continental transitional strata were widely developed in the Ordos Basin in Upper Carboniferous - Lower Permian. The Taiyuan - Shanxi Formation possesses promising shale gas exploration layers. Shale samples from two drilling wells of Shanxi-Taiyuan Formation in Shilou and Xixian, Ordos Basin, were investigated to study their carbon–sulfur contents and distribution characteristics of organic
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A heterogeneous analysis of the nexus between energy consumption, economic growth and carbon emissions: Evidence from the Group of Twenty (G20) countries Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-18 Kaodui Li; Enhua Hu; Chenchen Xu; Mohammed Musah; Yusheng Kong; Isaac Adjei Mensah; Jingqin Zu; Wen Jiang; Yongzheng Su
The purpose of this study was to examine the nexus amid economic growth, energy consumption and carbon emissions in G20 countries for the period 1992 to 2014. In order to obtain valid and reliable outcomes, more robust econometric techniques were employed. From the results, the studied panel was heterogeneous and cross-sectionally dependent. Also, the series of observed variables were first-differenced
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Evaluating the potential energy savings of residential buildings and utilizing solar energy in the middle region of Saudi Arabia – Case study Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-17 AbdulRahman S Almushaikah; Radwan A Almasri
Lately, with the growth in energy consumption worldwide to support global efforts to improve the climate, developing nations have to take significant measures. Kingdom of Saudi Arabia (KSA) implemented meaningful policy actions towards promoting energy efficiency (EE) in several sectors, especially in the building sector, to be more sustainable. In this paper, various EE measures and solar energy prospects
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Origin and paleoenvironment of organic matter in the Wufeng–Longmaxi shales in the northeastern Sichuan basin Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-13 Chaoyong Wang; Zaitian Dong; Xuehai Fu; Xin Hu; Zhen Li
The formation environment and preservation conditions of sedimentary organic matter (OM) play an important role in the accumulation of shale gas. In the present study, inorganic and organic geochemical data were analyzed to determine the origin and preservation environment of sedimentary OM in the Wc-1 well of the Wufeng–Longmaxi (WF–LMX) Formation in northeastern Chongqing, China. In a biomarkers
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Development of solar photovoltaic industry and market in China, Germany, Japan and the United States of America using incentive policies Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-13 Daoyuan Wen; Weijun Gao; Fanyue Qian; Qunyin Gu; Jianxing Ren
Solar photovoltaic (PV) technology has developed rapidly in the past decades and is essential in electricity generation. In this study, we demonstrate the relationship between PV incentive policies, technology innovation and market development in China, Germany, Japan and the United States of America (USA) by conducting a statistical data survey and systematic literature review. This article investigates
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Numerical and experimental study of effect of paraffin phase change heat storage capsules on the thermal performance of the solar pond Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-06 Hua Wang; Ma Xiaomeng; Zhang Liugang; Xinmin Zhang; Yanyang Mei; Anchao Zhang
In this paper, the effect of adding the composite PCM (Phase Change Material) heat storage capsules to the heat storage layer of the salt gradient solar pond on the thermal performance of the solar pond was studied numerically and experimentally. Based on the program-controlled temperature simulation of the solar pond experimental platform, the effect of adding the composite PCM (48–50°C and 58–60°C
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A field development strategy for the joint optimization of flow allocations, well placements and well trajectories Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-06 M A Dada; M Mellal; A Makhloufi; H Belhouchet
One of the major goals that field planning engineers and decision makers have to achieve in terms of reservoir management and hydrocarbon recovery optimization is the maximization of return on financial investments. This task yet very challenging due to high number of decision variables and some uncertainties, pushes the engineers and technical advisors to seek for robust optimization methods in order
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Effectiveness of energy conservation awareness package on energy conservation behaviors of off-campus students in Nigerian universities Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-06 Theresa Chinyere Ogbuanya; Nuhu Iliya Nungse
Poor energy conservation behaviors among off-campus students are a form of irrational behavior that often results in erratic power supply within the students' village. The present study, therefore, explored the effectiveness of energy conservation awareness package (ECAP) on energy conservation behaviors of off-campus students residing within students' villages of Nigerian Universities. A pretest-posttest
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Guardrail-based air supply terminal for improving ventilation effectiveness and saving energy in the waiting zone Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-06 Ran Gao; Haimeng Li; Angui Li; Ting Lai; Wuyi Du; Baoshun Deng; Linhua Zhang; Wenjun Lei
In the waiting zones of airports, train stations, and other transportation hubs, poor indoor environment is primarily caused by human body-related factors in conjunction with the high density of people. Existing ventilation systems cannot effectively remove the waste heat and pollutants generated by dense crowds. In this paper, a guardrail-based air supply terminal is proposed. Two indices, the velocity
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Gas hydrate in-situ formation and dissociation in clayey-silt sediments: An investigation by low-field NMR Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-03 Xiaoxiao Sun; Xuwen Qin; Hongfeng Lu; Jingli Wang; Jianchun Xu; Zijie Ning
The hydrate reservoir in the Shenhu Area of the South China Sea is a typical clayey-silt porous media with high clay mineral content and poor cementation, in which gas hydrate formation and dissociation characteristics are unclear. In this study, the CO2 hydrate saturation, growth rate, and permeability were studied in sandstone, artificial samples, and clayey-silt sediments using a custom-built measurement
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A fractal permeability model for the dual-porosity media of tight gas reservoirs Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-03 Fanhui Zeng; Tao Zhang; Jie Yang; Jianchun Guo; Qiang Zhang; Wenxi Ren
Hydraulic fracturing is a crucial method for the exploitation of tight gas reservoirs. The matrix permeability is a key factor influencing the fracturing result. This paper assumes that the matrix permeability is provided by a series of capillary bundles and tree-like networks, fully considering the stress sensitivity to establish a single-capillary (fracture) flow equation in terms of factors such
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Multi-objective optimization for oil-gas production process based on compensation model of comprehensive energy consumption using improved evolutionary algorithm Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-03 Tan Liu; Qinyun Yuan; Lina Wang; Yonggang Wang; Nannan Zhang
This paper establishes an error compensation multi-objective optimization model of oil-gas production process for optimizing these production indices, including overall oil production, overall water production and comprehensive energy consumption per ton of oil. In order to reduce the error between the model output and the actual value of comprehensive energy consumption per ton of oil, combining the
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Comprehensive characterization of nano-pore system for Chang 7 shale oil reservoir in Ordos Basin Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-01 Hui Gao; Jie Cao; Chen Wang; Teng Li; Mengqing He; Liangbin Dou; Xiang Li
Detailed study on the pore structure of shale oil reservoir is significantly for the exploration and development, and the conventional single pore structure measurement method cannot accurately describe the pore structure characteristics of the shale oil reservoir. In this paper, the Field Emission Scanning Electron Microscope (FESEM), low-pressure nitrogen adsorption (LP-N2A) and mercury injection
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Carbon emissions factor evaluation for assembled building during prefabricated component transportation phase Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-01 Haining Wang; Hong Zhang; Keming Hou; Gang Yao
This study focuses on the calculation of carbon emissions during prefabricated component transportation phase, figuring out how to accurately infer the carbon emissions factor according to the changing of external factors. Through tracking and analyzing the differences between prefabricated component transportation phase and ordinary building material transportation phase, this paper explores how to
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Fluid inclusions in buried quartz of the Yanchang sandstone in the Jiyuan area, Ordos Basin, China: Implications for basin evolution and petroleum accumulation Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-12-01 Wenqi Jiang; Yunlong Zhang; Li Jiang
A fluid inclusion petrographic and microthermometric study was performed on the sandstones gathered from the Yanchang Formation, Jiyuan area of the Ordos Basin. Four types of fluid inclusions in quartz can be recognized based on the location they entrapped. The petrographic characteristics indicate that fluid inclusions in quartz overgrowth and quartz fissuring-I were trapped earlier than that in quartz
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Soil water content estimation using ground penetrating radar data via group intelligence optimization algorithms: An application in the Northern Shaanxi Coal Mining Area Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-11-26 Fan Cui; Jianyu Ni; Yunfei Du; Yuxuan Zhao; Yingqing Zhou
The determination of quantitative relationship between soil dielectric constant and water content is an important basis for measuring soil water content based on ground penetrating radar (GPR) technology. The calculation of soil volumetric water content using GPR technology is usually based on the classic Topp formula. However, there are large errors between measured values and calculated values when
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The evolution characteristics of organic sulfur structure in various Chinese high organic sulfur coals Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-11-26 Yuegang Tang; Cong Chen; Xiaolong Li; Qiang Wei; Xin Guo; Robert B Finkelman; Weiwei Li; Xuan Huan
Understanding the organic sulfur structure and its evolution characteristics is crucial to the desulfurization of coal, as they are the dominant factors determining the removal of organic sulfur from coal. To learn the organic sulfur structure characteristics, a series of high-organic-sulfur coals from China with different ranks were studied by coal petrology, structural chemistry, and organic geochemistry
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Experimental study on fracture propagation of hydraulic fracturing for tight sandstone outcrop Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-11-12 Wenguang Duan; Baojiang Sun; Deng Pan; Tao Wang; Tiankui Guo; Zhiyuan Wang
The tight sandstone oil reservoirs characterized by the low porosity and permeability must be hydraulically fractured to obtain the commercial production. Nevertheless, the post-fracturing production of tight oil reservoirs is not always satisfactory. The influence mechanism of various factors on the fracture propagation in the tight oil reservoirs needs further investigation to provide an optimized
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Potential of wind energy resources around Nasawana village in Nabouwalu, Vanua Levu, Fiji Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-10-29 Krishnam Nair; Ajal Kumar
Fiji is located in the South Western part of the Pacific between latitude 18° S and longitude 179° E. In 2018, Fiji has spent approximately FJD 800 million in importing fossil fuel to meet the rising energy demand in the country. In the previous year’s several solar PV and wind resource assessments has been done and results obtained indicated that there is a potential for grid connected electricity
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Enhancing governance for environmental sustainability in sub-Saharan Africa Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-10-26 Simplice A Asongu; Nicholas M Odhiambo
This study assesses whether improving governance standards affects environmental quality in 44 countries in sub-Saharan Africa for the period 2000–2012. The empirical evidence is based on generalized method of moments. Bundled and unbundled governance dynamics are used, notably: (i) political governance (consisting of political stability and “voice and accountability”); (ii) economic governance (entailing
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Energy-saving potential of intermittent heating system: Influence of composite phase change wall and optimization strategy Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-10-22 Yanru Li; Enshen Long; Lili Zhang; Xiangyu Dong; Suo Wang
In the Yangtze River zone of China, the heating operation in buildings is mainly part-time and part-space, which could affect the indoor thermal comfort while making the thermal process of building envelope different. This paper proposed to integrate phase change material (PCM) to building walls to increase the indoor thermal comfort and attenuate the temperature fluctuations during intermittent heating
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Organic geochemical characteristics and comparison of the source rocks and the severely biodegradable oil sands around Karamay, China Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-10-19 Chong Feng; Wenjun He; Hua Cai; Jingyuan Zhang; Yinlan Nie
For the sake of explaining the organic geochemical characteristics of the hydrocarbon source rocks (SRs) around Karamay, such as thermal maturity (TM) (evidences from the temperature of maximum pyrolysis yield (Tmax), the Carbon Preference Index (CPI) and Odd to Even Preference (OEP) values, the C30 M/H versus Tm/Ts, the C29 ββ/(ββ + αα) versus C29 20 S/(20 S + 20 R)), hydrocarbon potential (HP) (evidences
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Experimental study on the spatial and temporal variations of temperature and indicator gases during coal spontaneous combustion Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-10-13 Junchao Chen; Lin Li; Deyi Jiang; Lei Zhou; Liang Wang
Coal spontaneous combustion is one of the main potential hazards in the process of mining. To study the spatial and temporal variations of higher-temperature area and indicator gases, an adiabatic oxidation testing system was developed to simulate the whole process of coal spontaneous combustion. The experimental results show that the entire process of coal spontaneous combustion could be divided into
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Production behavior evaluation on multilayer commingled stress-sensitive carbonate gas reservoir Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-10-13 Jianlin Guo; Fankun Meng; Ailin Jia; Shuo Dong; Haijun Yan; Hao Zhang; Gang Tong
Influenced by the complex sedimentary environment, a well always penetrates multiple layers with different properties, which leads to the difficulty of analyzing the production behavior for each layer. Therefore, in this paper, a semi-analytical model to evaluate the production performance of each layer in a stress-sensitive multilayer carbonated gas reservoir is proposed. The flow of fluids in layers
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Local drags of the completion string with packers in horizontal wells Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-10-12 Qimin Liang; Bairu Xia; Baolin Liu; Baokui Gao
The multistage stimulation technique and horizontal wells are increasingly being utilized to improve oil and gas recovery. However, the sticking that occurs due to large drag during the completion string with packers tripping into the horizontal section, resulting in an abandoned well and huge economic losses. Based on a classical drag model, this paper illustrates how local drags affect the overall
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Financial development, income inequality and carbon emissions in sub-Saharan African countries: A panel data analysis Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-10-07 Nicholas M Odhiambo
This paper examines the dynamic relationship between financial development, income inequality and carbon dioxide (CO2) emissions in a step-wise fashion, using data from 39 sub-Saharan African (SSA) countries during the period 2004–2014. The study uses three income inequality indicators – the Gini coefficient, the Atkinson index and the Palma ratio – to examine these linkages. The study employs the
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Economic growth and environmental sustainability from renewable energy applications Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-10-06 Chih-Chun Kung; Tsung-Ju Lee; Li-Jiun Chen
The use of fossil fuel causes severe environmental problem such as climate change in the global scale and acid rain in the regional level. Along with its nonrenewable property, renewable and clean energy sources must be explored so as to keep the economy growing sustainably. Nowadays many renewable energy alternatives such as bioenergy, solar power, hydro power, and wind power have been employed, and
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Hybrid power systems – Sizes, efficiencies, and economics Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-10-06 Shafiqur Rehman
In the context of electricity generation in the oil and gas producing countries, it has become implicit to develop new, clean, and renewable sources of energy to supplement the fossil fuel based power generation. With this single aim, one can hit two targets, conservation of fixed fossil fuel resources and combat the adverse climatic changes to safeguard our planet. In regional context, solar photovoltaic
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Exploring the distribution of energy consumption in a northeast Chinese city based on local climate zone scheme: Shenyang city as a case study Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-09-30 Guang Yang; Yanpeng Fu; Minghui Yan; Jing Zhang
The local climate zone (LCZ) scheme is now used to investigate urban heat islands, which provides additional reference for energy consumption simulation. Based on the LCZ scheme, a LCZ mapping of Shenyang, a city in northeast China, was first constructed using the World Urban Database and Access Portal Tools (WUDAPT) Level 0 method. Subsequently, DeST-h was considered to simulate the energy consumption
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Hydrocarbon generation and expulsion of Middle Jurassic lacustrine source rocks in the Turpan–Hami Basin, NW China: Implications for tight oil accumulation Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-09-30 Yue Feng; Zhilong Huang; Tianjun Li; Enze Wang; Hua Zhang; Yu Liang
In recent years, new oil reservoirs have been discovered in the middle Jurassic tight mixed rocks of the Turpan–Hami Basin. However, the generation potential of the J2q2 source rocks remains poorly understood. Petrographic, petrological, and geochemical analyses were carried out to assess the quality of the J2q2 source and reservoir rocks. The hydrocarbon generation potential method was utilized to
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Metaheuristic searching genetic algorithm based reliability assessment of hybrid power generation system Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-09-30 Ahmed N Abdalla; Muhammad Shahzad Nazir; MingXin Jiang; Athraa Ali Kadhem; Noor Izzri Abdul Wahab; Suqun Cao; Rendong Ji
Generating systems are known as adequately reliable when satisfying the load demand. Meanwhile, the efficiency of electrical systems is currently being more influenced by the growing adoption of the Wind/Solar energy in power systems compared to other conventional power sources. This paper proposed a new optimization approach called Metaheuristic Scanning Genetic Algorithm (MSGA) for the evaluation
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Chemical structure changes of marine shale caused by supercritical carbon dioxide Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-09-29 Bowen Tang; Jiren Tang; Yiyu Lu; Huajian Shen; Zhaohui Lu; Xiayu Chen; Rongrong Tian; Zhidan Zhu
The interaction between shale and CO2 is of great significance to CO2 storage and shale gas production; however, there are few reports on chemical changes after CO2 injection into shale reservoirs. We used Fourier transform infrared spectroscopy to study the chemical structure changes of shale samples before and after CO2 injection. In this paper, self-developed high-temperature and high-pressure vessels
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Analysis of hydraulic fracture behavior and well pattern optimization in anisotropic coal reservoirs Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-09-29 Yulong Liu; Dazhen Tang; Hao Xu; Wei Hou; Xia Yan
Macrolithotypes control the pore-fracture distribution heterogeneity in coal, which impacts stimulation via hydrofracturing and coalbed methane (CBM) production in the reservoir. Here, the hydraulic fracture was evaluated using the microseismic signal behavior for each macrolithotype with microfracture imaging technology, and the impact of the macrolithotype on hydraulic fracture initiation and propagation
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A parametric study of hydraulic fracturing interference between fracture clusters and stages based on numerical modeling Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-09-23 Ang Chen; Xuyang Guo; Huiyong Yu; Lei Huang; Shanzhi Shi; Ning Cheng
Shale oil reservoirs are usually developed by horizontal wells completed with multi-stage hydraulic fractures. The fracture interference between clusters in a single stage and between consecutive stages has an impact on the stimulation quality in terms of fracture geometries and fracture widths. This study introduces a non-planar hydraulic fracture model based on the extended finite element method
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Efficiency comparison of historical and newly developed Weibull parameters estimation methods Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-09-22 Muhammad Sumair; Tauseef Aized; Syed Asad Raza Gardezi; Muhammad Waqas Aslam
This work compares the efficiency of historically used Weibull parameters estimation methods with newly developed method. Newly developed method has been termed as Combined Linearized Moment Method (CLMM). Five-year wind data at five locations namely Chaghi, Lehri, Badin, Hyderabad and Nankana Sahib (Pakistan) was used for the calculation of Weibull parameters. Efficiency was assessed and compared
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Simulation and experimental verification of energy saving effect of passive preheating natural ventilation double skin façade Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-09-09 Keming Hou; Shanshan Li; Haining Wang
In recent years, energy efficiency and energy saving strategies have become priorities for energy policy in most countries, and green energy saving buildings has attracted more attention in the worldwide. The use of passive energy saving natural ventilation strategy can improve the effect of building energy saving and improve the internal microenvironment of the building. This paper introduces and
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Experimental research on desorption characteristics of gas-bearing coal subjected to mechanical vibration Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-31 Xuexi Chen; Liang Zhang; Maoliang Shen
Mechanical vibration can induce coal and gas outburst accidents, and can also promote the exploitation of coalbed methane. In this paper, a vibration-adsorption-desorption experiment system was established, the effects of coal sample particle diameter, gas pressure, and vibration frequency on gas desorption were studied. Mechanical vibration can generate a shear force in the adsorbed gas and promote
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Development of renewable energy multi-energy complementary hydrogen energy system (A Case Study in China): A review Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-30 Zheng Li; Wenda Zhang; Rui Zhang; Hexu Sun
The hydrogen energy system based on the multi-energy complementary of renewable energy can improve the consumption of renewable energy, reduce the adverse impact on the power grid system, and has the characteristics of green, low carbon, sustainable, etc., which is currently a global research hotspot. Based on the basic principles of hydrogen production technology, this paper introduces the current
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Towards a sustainable 2022 FIFA World Cup in Qatar: Evaluation of wind energy potential for three football stadiums Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-27 Carlos Méndez; Yusuf Bicer
This study analyzes the feasibility of satisfying the demand of three Football Stadiums for the 2022 FIFA World Cup in Qatar, using the wind’s kinetic energy. For all three selected locations (Lusail, Al Rayyan, and Al Wakrah), the wind potentiality is calculated through an environmental parameters study, from which the wind power density is obtained. Furthermore, a commercial wind turbine with proper
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Sandbody architecture analysis of braided river reservoirs and their significance for remaining oil distribution: A case study based on a new outcrop in the Songliao Basin, Northeast China Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-27 Dongsheng Zang; Zhidong Bao; Mingyi Li; Ping Fu; Min Li; Bo Niu; Zhuolun Li; Li Zhang; Mingyang Wei; Luxing Dou; Xiting Xu
The reservoir architecture analysis of braided rivers, especially falling-silt seam forms, has played a key role in predicting remaining oil distributions. However, no studies have used architecture analyses that document braided river outcrops and researched the tapping of the few remaining oil distributions based on outcrops in the Songliao basin, northeast China. In this paper, the architecture
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Research on forecasting coal bed methane demand and resource allocation system based on time series Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-27 Jianshe Linghu; Jinhua Chen; Zhiming Yan
The mining area is the main place for the development and utilization of Coalbed Methane (CBM), and there are a series of systems for the development and utilization of CBM. However, owing to lack of a clear understanding of demand-side gas consumption rules and a reasonable resource allocation system, a large amount of CBM resources in the mining area are wasted. In order to predict the demand for
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Transient pressure behavior of horizontal well in gas reservoirs with arbitrary boundary Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-26 Bo Ning; Jiafeng Xu; Jing Jiang; Minhua Cheng
Transient pressure analysis is a crucial tool to forecast the production performance during the exploration and production process in gas reservoirs. Usually, a regular shaped outer boundary is assumed in previous studies for well-testing analysis, which is just a simplification of practical cases and cannot reflect the actual boundaries of reservoirs. In this paper, a mathematical model is established
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Genesis of dolomite in the upper assemblage of the Ordovician Majiagou Formation in the southeastern Sulige gas field, Ordos Basin, China: Evidence from C, O, and Sr isotopes and major and trace elements Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-24 Liwen Zhu; Zhenliang Wang; Qianghan Feng; Bo Zhang; Li Wei; Zhuyu Yu
Typical dolomite reservoirs exist in the upper assemblage of the Ordovician Majiagou Formation in the southeastern Sulige gas field, Ordos Basin, however, the current understanding of dolomite genesis needs to be clarified. This study confirms the dolomitization characteristics, diagenetic environment, and genesis of dolomite through the use of core observations, thin section identification, and geochemical
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Hydrodesulfurization of benzothiophene on Ni2P surface Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-24 Riyi Lin; Huida Pan; Weidong Xu; Liqiang Zhang; Xinwei Wang; Jianliang Zhang; Kai Chen
The study of benzothiophene hydrodesulfurization reaction path contribute to clarifying the mechanism of hydrodesulfurization (HDS) of heavy oil. In this work, experiments and simulations were combined to study the reaction pathway of benzothiophene hydrodesulfurization catalyzed by Ni2P. In experimental part, Ni2P catalyst was prepared and characterized. Then, the catalytic property of the catalyst
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Effect of peat mire evolution on pore structure characteristics in thick coal seam: Examples from Xishanyao Formation (Middle Jurassic), Yili Basin, China Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-24 Rongfang Qin; Anmin Wang; Daiyong Cao; Yingchun Wei; Liqi Ding; Jing Li
The physical properties of thick coal seams show strong vertical heterogeneity; thus, an accurate characterization of their pore structure is essential for coalbed methane (CBM) exploration and production. A total of 18 coal samples, collected from a thick coal seam in the Yili Basin of NW China, were tested by a series of laboratory experiments to investigate the peat mire evolution and pore structure
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The mechanism of stability of fault system inducing roof water-inrush Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-24 Ma Zhijing; Li Yanheng; Bian Kai; Yang Zhibin; Gao Lijun; Liu Bo; Pang Yu; Balaji Panchal
This paper analyzes the strain stability during mining, which often causes a water inrush. Mining couses costant stress on the fault zone, which is a loading process on the system composed of fault material and surrounding medium. A cusp catastrophe model is presented and the necessary and sufficient conditions leading to fault systems are discussed. The fault zone is assumed to be planar and is a
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Modelling and study of energy storage devices for photovoltaic lighting Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-24 Marwa Ben Slimene; Mohamed Arbi Khlifi
The electricity production via these sources of energy, offers a bigger safety of supply to the consumers while respecting the environment. For that reason, the principal objective of this paper is to study and control the photovoltaic lighting energy storage system. We presented the study of the whole PV system such as solar panels, DC chopper, batteries with account of all conditions of the sites
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A study of the mechanical structure of the direct roof during the whole process of non-pillar gob-side entry retaining by roof cutting Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-20 Xiao Liu; Xinzhu Hua; Peng Yang; Zhiguo Huang
The non-pillar entry (roadway) retained by roof cutting serves the two adjacent working faces. As compared with the conventional mining roadways, the roadway retained by roof cutting has a longer life cycle and receives more complicated influence from mining. Determining the location where the roof deformation and maximum deformation occur can provide an important basis for roadway support. Here, the
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Editorial: Building integrated renewable energy Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-20 Yaolin Lin; Wei Yang; Xiaoli Hao; Changxiong Yu
About one-third of the primary energy in the world is consumed by buildings. A large amount of CO2 emission due to building energy consumption has threatened the sustainable development of the world. Improvement on the building energy performance, especially by integration with renewable energy resources has attracted interest worldwide to reduce greenhouse gas emission to make our society more sustainable
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Extrapolation of wind data using generalized versus site-specific wind power law for wind power production prospective at Shahbandar- a coastal site in Pakistan Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-19 Muhammad Sumair; Tauseef Aized; Syed Asad Raza Gardezi
The aim of this work is to compare the wind data extrapolated by 1/7th wind power law and site-specific wind power law for wind power potential estimation at Shahbandar. Both the Wind shear exponents (WSE) and local air density values were calculated using measured wind data at 10 and 30 m heights and they were found minimum in summer and maximum in winter. Weibull distribution was applied with a newly
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Oil chemometrics and geochemical correlation in the Weixinan Sag, Beibuwan Basin, South China Sea Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-17 Yao-Ping Wang; Xin Zhan; Tao Luo; Yuan Gao; Jia Xia; Sibo Wang; Yan-Rong Zou
The oil–oil and oil–source rock correlations, also termed as geochemical correlations, play an essential role in the construction of petroleum systems, guidance of petroleum exploration, and definition of reservoir compartments. In this study, the problems arising from oil–oil and oil–source rock correlations were investigated using chemometric methods on oil and source rock samples from the WZ12 oil
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Experimental study on the influence of coal powders on the performance of water-based polymer drilling fluid Energy Explor. Exploit. (IF 1.382) Pub Date : 2020-08-11 Lei Zhang; Xiaoming Wu; Shuaifeng Lyu; Penglei Shen; Lulu Liu; Yongzhong Mou; Yujie Sun
Coal powders, as cuttings, invade the drilling fluid along a coal seam during coalbed methane development, thereby changing the properties of the drilling fluid. Therefore, this work aims to investigate the influence of coal powders on drilling fluid performance. The powders of lignite, anthracite, and contrasting shale were added to a water-based polymer drilling fluid. Then, the rheology, filtration
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