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基于压裂液自发吸入模型的页岩气压裂液滤失定量预测

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天然气工业 2024年第2期44卷 92-98页

作者：王琳琳蔺小博冷静怡周长静马占国肖元相中国石油大学(北京)安全与海洋工程学院中国石油长庆油田公司油气工艺研究院巴黎高科路桥学院

非常规油气资源开发常使用水力压裂技术提高单井产量,然而压裂现场数据表明,大量压裂液会滞留在地层中导致压裂液的返排率较低,将对储层和地下水环境造成一定影响。为进一步研究压裂液滤失机理并准确预测压裂液滤失量,首先建立了由毛细... 详细信息

非常规油气资源开发常使用水力压裂技术提高单井产量,然而压裂现场数据表明,大量压裂液会滞留在地层中导致压裂液的返排率较低,将对储层和地下水环境造成一定影响。为进一步研究压裂液滤失机理并准确预测压裂液滤失量,首先建立了由毛细管力作用引起的压裂液自发吸入模型,然后对压裂液滤失量进行定量计算,并在现场进行了验证。最后,引入无量纲吸入率参数分析了控制压裂液滤失的关键因素。研究结果表明:(1)页岩气水平井压裂施工中大约50%~95%的压裂液通过基质吸入,压裂液吸入量仅与吸入率参数、裂缝面积和吸收时间有关;(2)当润湿相黏度与非润湿相黏度之比超过阈值时,吸入率参数主要由岩石的孔径分布参数决定,流体黏度的影响非常有限;(3)当孔径分布参数介于0.5~0.7时,吸入率参数达到相对较高的值,即更多的压裂液被吸收到地层中;(4)当润湿相黏度与非润湿相黏度之比大于10,孔径分布参数小于0.8时,优化后的自吸模型具有较大的适用性;(5)由毛细管力机理引起的压裂液滤失量与实际储层观察到的滤失量相近,可认为页岩储层有足够的存储滤失液的能力,不会影响地下水层中的饮用水。结论认为,建立的压裂液自发吸入模型,能够准确预测页岩气水平井压裂液滤失量,为非常规油气的生产及环境保护提供了技术支撑。

关键词：页岩气藏毛细管力滤失自发吸入吸入率参数流体黏度孔径分布参数

复杂敏感环境城区隧道爆破振动及噪声控制技术

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爆破器材 2024年第2期53卷 50-55页

作者：种玉配李治国马占国刘书奎中铁隧道局集团特种高新技术有限公司上海201306 中铁隧道局集团有限公司广东广州511400 中国矿业大学力学与土木工程学院江苏徐州221116

为了避免和减少隧道爆破振动及噪声对复杂敏感环境城区的影响,以珠海板障山新增隧道为例,采用数值模拟和现场爆破试验的方法,对不同掏槽眼延期时间下既有隧道迎爆侧进行爆破振动监测。发现掏槽眼延期时间4 ms时,既有隧道迎爆侧爆破振速... 详细信息

为了避免和减少隧道爆破振动及噪声对复杂敏感环境城区的影响,以珠海板障山新增隧道为例,采用数值模拟和现场爆破试验的方法,对不同掏槽眼延期时间下既有隧道迎爆侧进行爆破振动监测。发现掏槽眼延期时间4 ms时,既有隧道迎爆侧爆破振速最小。同时,针对隧道进口段周边建筑物繁多、爆破噪声大、飞石迸溅的问题,进行了炮孔封堵和防飞石的试验。设计发明了一种新型炮孔堵塞装置,在装药量增大情况下,爆破噪声能够控制在允许范围内。在洞口采用联合防护门帘,减少了飞石迸溅的风险。可为复杂敏感环境城区隧道爆破振动和噪声控制提供参考。

关键词：敏感环境爆破振动爆破噪声电子雷管

Study on the treatment of spraying wastewater from coal-fired flue gas by using discharge free radicals

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Waste Disposal and Sustainable Energy 2022年第3期4卷 231-242页

作者： YuHai Sun zhanguo Lu yang Huang ZiKe Qiu HanTing Huang ChangMing Du Sinopec Research Institute of Petroleum Engineering DongyingChina Hefei Institutes of Physical Science Chinese Academy of SciencesHefeiChina School of Environmental Science and Engineering Sun Yat-Sen UniversityGuangzhou510275China

The coal-fired flue gas spraying wastewater is a kind of refractory mixed wastewater with poor *** this study,the degradation of model coal-fired flue gas spraying wastewater was studied by using discharge free radicals produced by double-dielectric barrier *** degradation rate of pollutants,chemical oxygen demand removal rate and other indicators were detected,and the influence of different conditions on the degradation effect was *** optimal parameters are as follows:residence time 120 min,input power 170.0 W,initial pH value 3.79,and aeration rate 1.8 mL/*** initial concentrations of acetone,formaldehyde,chloroform,benzene and toluene were 100,100,100,and 100 mg/L,***,it is proved that the discharge area is independent of the degradation *** the analysis of the mechanism,it is found that·OH is an important factor affecting the degradation rate of pollutants in model coal-fired flue gas spraying wastewater.

关键词： Coal-fired flue gas Spraying wastewater Organic pollutants Double dielectric barrier discharge

Mid-wavelength nBn photodetector with high operating temperature and low dark current based on InAs/InAsSb superlattice absorber

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Chinese Optics Letters 2024年第1期22卷 123-127页

作者：曹澎王天财彭红玲李占国 Qiandong Zhuang 郑婉华 Laboratory of Solid-State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China College of Electronic and Communication Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Physics Changchun Normal UniversityChangchun 130022China Physics Department Lancaster UniversityLancaster LA14YBUK

In this paper,we demonstrate nBn InAs/InAsSb type II superlattice(T2SL)photodetectors with AlAsSb as the barrier that targets mid-wavelength infrared(MWIR)*** improve operating temperature and suppress dark current,a specific Sb soaking technique was employed to improve the interface abruptness of the superlattice with device passivation using a SiO_(2) *** result in ultralow dark current density of 6.28×10^(-6)A/cm^(2)and 0.31 A/cm^(2)under-600 mV at 97 K and297 K,respectively,which is lower than most reported InAs/InAsSb-based MWIR *** resistance area product values of 3.20×10^(4)Ω·cm^(2)and 1.32Ω·cm^(2)were obtained at 97 K and 297 K.A peak responsivity of 0.39 A/W with a cutoff wavelength around 5.5μm and a peak detectivity of 2.1×10^(9)cm·Hz^(1/2)/W were obtained at a high operating temperature up to 237 K.

关键词： mid-wavelength infrared photodetector InAs/InAsSb superlattice high operating temperature dark current

Development of a CH4 dehydroaromatization–catalyst regeneration fluidized bed system

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Chinese Journal of Chemical Engineering 2018年第9期26卷 1928-1936页

作者： Peng Yan zhanguo Zhang Dapeng Li Xu Cheng Xinzhuang Zhang Fan yang Chuanfeng Huang Xiaoxun Ma School of Chemical Engineering Northwest University229 North Taibai RoodXi'an 710069China Research Institute of Yanchang Petroleum(Group)Co.Ltd Xi'an 710075China Chemical Engineering Research Center of the Ministry of Education(MOE)for Advanced Use Technology of Shanbei Energy Xi'an 710069China Shaanxi Research Center of Engineering Technology for Clean Coal Conversion Xi'an 710069China Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi Xi'an 710069China International Scientific and Technological Cooperation Bose of the Ministry of Science and Technology(MOST)for Clean Utilization of Hydrocarbon Resources Xi'an 710069China National Institute of Advanced Industrial Science and Technology(AIST) 16-1 OnogawaTsukuba305-8569IbarakiJapan Hydrocarbon High-efficiency Utilization Technology Research Center of Yanchang Petroleum(Group)Co.Ltd Xi'an 710075China

A pilot-scale methane dehydroaromatization–H_2regeneration fluidized bed system(MDARS)was *** the MDARS,the catalyst circulation between a fluidized bed reactor and a fluidized bed regenerator with the help of a catalyst feeder allowed methane dehydroaromatization(MDA)and H_2regeneration to be carried out simultaneously,which is good for maintaining a stable MDA catalytic activity.A fixed bed reactor(FB)and a single fluidized bed reactor(SFB)were also used for a comparative *** experimental results showed that the catalytic activity in the MDARS was more stable than that in the FB and SFB *** effects of some parameters of MDARS on the CH_4conversion and product selectivity were *** verify the feasibility and reliability of the MDARS,an eight-hour long-term test was carried out,which demonstrated that the operation of the MDARS was stable and that the catalytic activity remained stable throughout the entire experimental period.

关键词： Methane dehydroaromatization Hydrogen regeneration Fluidized bed reactor Pilot-scale Catalyst circulation

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HX60小型顺逆流稻谷烘干机研发和设计

粮食流通技术 2013年第5期 16-17,31页

作者：秦锋邢俊杰杨占国谢建松梁国珍贾煜陈敬举国家粮食储备局郑州科学研究设计院郑州450053

针对南方小批量稻谷烘干问题,提出HX60小型顺逆流烘干机设计方案,该机采用板材折边工艺,提高设备整体美观性,两侧废气道设计,降低周边环境污染。采用"多段、变温、长缓苏"的烘干工艺,提高了烘干品质。

关键词：稻谷烘干顺逆流折边工艺废气

K3PO4-Promoted Cyclopropanation of Electron-deficient Alkenes with 2-Bromo-1,3-Propanedione Compounds

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Chemical Research in Chinese Universities 2019年第6期35卷 1002-1007页

作者： CHEN zhanguo WEN Ting HOU Dan Key Laboratory for Macromolecular Science of Shaanxi Province School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'an 710119P.R.China

An easy and efficient method for the synthesis of multisubstituted cyclopropane derivatives from electron-deficicent alkenes with 2-bromo-1,3-propanedione compounds was *** this method,ethylα-cyanocinnamate derivatives 1 andβ,β-dicyanostyrene derivatives 4 can all smoothly reacted with 2-bromo-1,3-propanedione compounds 2 to afford the corresponding multisubstituted cyclopropane derivatives 3 and 5 in good to excellent yields(up to 100%)promoted by anhydrous K3PO4 in DMF at room temperature,respectively.A possible mechanism of this reaction was *** of all the products were confirmed by ^1H NMR,^13C NMR and HRMS.

关键词： Cyclopropanation Multisubstituted cyclopropane derivative Electron-deficicent alkene 2-Bromo-l,3-propanedione compound

高压氧联合尼莫地平在接受颅内动脉瘤夹闭术患者中的效果

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河南医学研究 2024年第11期33卷 2020-2024页

作者：罗越岭袁波谭占国漯河市源汇区人民医院神经外科河南漯河462000 漯河市中心医院神经外科河南漯河462000 郑州大学第一附属医院南院区神经外科河南郑州450052

目的探讨颅内动脉瘤(IA)夹闭术患者术后接受高氧与尼莫地平治疗的效果。方法选取2018年1月至2023年1月在漯河市源汇区人民医院接受IA夹闭术的90例患者作为研究对象,采用随机数字表法分为观察组(45例)和对照组(45例)。术后对照组接受... 详细信息

目的探讨颅内动脉瘤(IA)夹闭术患者术后接受高氧与尼莫地平治疗的效果。方法选取2018年1月至2023年1月在漯河市源汇区人民医院接受IA夹闭术的90例患者作为研究对象,采用随机数字表法分为观察组(45例)和对照组(45例)。术后对照组接受尼莫地平治疗,观察组在对照组基础上接受高压氧治疗。比较两组患者不同时点脑血流动力学指标、神经功能损伤情况、脑血管痉挛(CVS)发生情况、预后、生活质量及日常生活能力。结果治疗后第14天,观察组大脑中动脉平均血流速度(MFV)、收缩期最大峰值流速(SPV)均高于对照组(P<0.05),而血管阻力指数(RI)及搏动指数(PI)低于对照组(P<0.05),CVS发生率低于对照组(P<0.05),简明健康状况调查表(SF-36)评分及日常生活能力评定量表(ADL)评分高于对照组(P<0.05),格拉斯哥结局量表(GOS)预后情况优于对照组(P<0.05);治疗后第7、14天,观察组美国国立卫生研究院卒中量表(NIHSS)评分低于对照组(P<0.05)。结论高压氧联合尼莫地平可改善IA夹闭术患者术后脑血流及神经功能,并降低脑血管痉挛发生率,改善患者预后,提高生活质量及日常生活能力。

关键词：高压氧尼莫地平颅内动脉瘤夹闭术脑血流神经功能

Study on the mechanism of color coordinate shift of LED package

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Journal of Semiconductors 2017年第7期38卷 78-82页

作者： Yunyi Zhuang Yong Wang Bobo yang zhanguo Li Lei yang Jun Zou National Key Laboratory on High Power Semiconductor Lasers Changchun University of Science and TechnologyChangchun 130022 China Zhejiang Emitting Optoelectronic Technology Co. Ltd. Jiaxing 314100 China School of Science Institute of Technology Shanghai 201418 China

In the paper, the influences of the chip, silicone and phosphors on the color coordinate shift of LED were studied. In the process of LED baking, it was found that the effect of the chip and silicone on the color coordinate drift is less than 3% through the analysis of each influencing factor. But the influence of the phosphors is large and accounted for 11.11% of the overall impact factors. Therefore, it is important to select the better green phosphors in thermal stability for the LED package and it has a guiding significance to the color coordinate of LED distribution.

关键词： light-emitting diode(LED) phosphors spectra intensity shift