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| 1 | Key technologies and practice for gas field storage facility construction of complex geological conditions in China显示文摘In view of complex geological characteristics and alternating loading conditions associated with cyclic large amount of gas injection and withdrawal in underground gas storage(UGS) of China, a series of key gas storage construction technologies were established, mainly including UGS site selection and evaluation, key index design, well drilling and completion, surface engineering and operational risk warning and assessment, etc. The effect of field application was discussed and summarized. Firstly, trap dynamic sealing capacity evaluation technology for conversion of UGS from the fault depleted or partially depleted gas reservoirs. A key index design method mainly based on the effective gas storage capacity design for water flooded heterogeneous gas reservoirs was proposed. To effectively guide the engineering construction of UGS, the safe well drilling, high quality cementing and high pressure and large flow surface injection and production engineering optimization suitable for long-term alternate loading condition and ultra-deep and ultra-low temperature formation were developed. The core surface equipment like high pressure gas injection compressor can be manufactured by our own. Last, the full-system operational risk warning and assessment technology for UGS was set up. The above 5 key technologies have been utilized in site selection, development scheme design, engineering construction and annual operations of 6 UGS groups, e.g. the Hutubi UGS in Xinjiang. To date, designed main indexes are highly consistent with actural performance, the 6 UGS groups have the load capacity of over 7.5 billion cubic meters of working gas volume and all the storage facilities have been running efficiently and safely. | MA Xinhua ZHENG Dewen SHEN Ruichen WANG Chunyan LUO Jinheng SUN Junchang | 2018 | Petroleum Exploration and Development2018，45，3： | 2 |
| 2 | Uniform and reproducible plasmon-enhanced fluorescence substrate based on PMMA-coated, large-area Au@Ag nanorod arrays显示文摘这里,我们描述提高电浆子的荧光底层基于 poly (甲基 methacrylate )(PMMA )-coated, 大区域的 Au@Ag nanorod 数组。PMMA 媒介的使用启用在作为在 Au@Ag nanorods 和染料分子之间的距离的一个函数提高并且熄灭进程之间的比赛的精确控制。在 56 nm 的最佳的 PMMA 层厚度(为哪个在 nanoparticles 和染料分子之间的距离是 16 nm ) ,多达 27 次的荧光的最大的改进被测量。在提高并且熄灭过程之间的比赛机制取决于 PMMA 层的厚度,它被一致试验性、理论的当模特儿的结果证实了。尤其是, micropatterned 提高金属的荧光(MEF ) 底层展出高一致性和重制度。此处描述的简单纺纱涂层过程提供吸引人、可伸缩、便宜的策略生产能潜在地在许多地里被使用的一致、可再现的大区域的 MEF 底层,例如生物晶片,诊断,和 photonics。 | Jun Sun Ziyang Li Yinghui Sun Liubiao Zhong Jing Huang Junchang Zhang Zhiqiang Liang Jianmei Chen Lin Jiang | 2018 | Nano Research2018，11，2： | 1 |
| 3 | Engineering multifunctional bioadhesive powders through dynamic metal-ligand coordination显示文摘Bioadhesive gels with robust adhesion on wet and irregular tissue surfaces are desirable for clinical applications.Assembly of bioadhesive powders is an effective strategy for obtaining gels that adhere to wet and irregular tissue surfaces by absorbing interfacial water.However,current bioadhesive powders lack positive biological functions and are prone to postoperative adhesion.Here,we present a powder strategy based on metal-ligand coordination to create a series of bioadhesive polyacrylic acid(PAA)gels.In the gel network,metal ions(M^(n+))are used to coordinate with the carboxy ligands of PAA to form dynamic noncovalent crosslinks.The powders can absorb interfacial water and assemble into gels on wet and irregular tissue surfaces within a few seconds,forming an initial adhesion layer by electrostatic interactions.Furthermore,the polymers can diffuse into the tissue matrix,and metal-ligand coordination is reconstructed to enhance the adhesion.Moreover,with a cationic shield layer,the bioadhesive powders can effectively avoid postoperative adhesion.Importantly,M^(n+) ions endow the gel with customized biological functions.We demonstrate that the hemostatic,antibacterial,peroxidase-like catalytic,and photodetachment abilities of the gels by incorporating different M^(n+) ions.These advantages make the bioadhesive powder a promising platform for diverse tissue repair applications. | Junchang Guo Yue Hou Liansong Ye Junnan Chen Hong Wang Li Yang Jinbo Jiang Qiangqiang Sun Chaoming Xie Bing Hu Jiaxi Cui Xu Deng | 2022 | Science China Chemistry2022，65，11： | 0 |
| 4 | HUID:DBN-Based Fingerprint Localization and Tracking System with Hybrid UWB and IMU显示文摘High-precision localization technology is attracting widespread attention in harsh indoor environments.In this paper,we present a fingerprint localization and tracking system to estimate the locations of the tag based on a deep belief network(DBN).In this system,we propose using coefficients as fingerprints to combine the ultra-wideband(UWB)and inertial measurement unit(IMU)estimation linearly,termed as a HUID system.In particular,the fingerprints are trained by a DBN and estimated by a radial basis function(RBF).However,UWB-based estimation via a trilateral method is severely affected by the non-line-of-sight(NLoS)problem,which limits the localization precision.To tackle this problem,we adopt the random forest classifier to identify line-of-sight(LoS)and NLoS conditions.Then,we adopt the random forest regressor to mitigate ranging errors based on the identification results for improving UWB localization precision.The experimental results show that the mean square error(MSE)of the localization error for the proposed HUID system reduces by 12.96%,50.16%,and 64.92%compared with that of the existing extended Kalman filter(EKF),single UWB,and single IMU estimation methods,respectively. | Junchang Sun Rongyan Gu Shiyin Li Shuai Ma Hongmei Wang Zongyan Li Weizhou Feng | 2023 | China Communications2023，20，2： | 0 |
| 5 | Numerical simulation-based correction of relative permeability hysteresis in water-invaded underground gas storage during multi-cycle injection and production显示文摘By conducting relative permeability experiments of multi-cycle gas-water displacement and imbibition on natural cores,we discuss relative permeability hysteresis effect in underground gas storage during multi-cycle injection and production.A correction method for relative permeability hysteresis in numerical simulation of water-invaded gas storage has been worked out using the Carlson and Killough models.A geologic model of water-invaded sandstone gas storage with medium-low permeability is built to investigate the impacts of relative permeability hysteresis on fluid distribution and production performance during multi-cycle injection and production of the gas storage.The study shows that relative permeability hysteresis effect occurs during high-speed injection and production in gas storage converted from water-invaded gas reservoir,and leads to increase of gas-water transition zone width and thickness,shrinkage of the area of high-efficiency gas storage,and decrease of the peak value variation of pore volume containing gas,and then reduces the storage capacity,working gas volume,and high-efficiency operation span of the gas storage.Numerical simulations exhibit large prediction errors of performance indexes if this hysteresis effect is not considered.Killough and Carlson methods can be used to correct the relative permeability hysteresis effect in water-invaded underground gas storage to improve the prediction accuracy.The Killough method has better adaptability to the example model. | ZHU Sinan SUN Junchang WEI Guoqi ZHENG Dewen WANG Jieming SHI Lei LIU Xianshan | 2021 | Petroleum Exploration and Development2021，48，1： | 0 |
| 6 | Manufacture technique of bronze-iron bimetallic objects found in M27 of Liangdaicun Site, Hancheng, Shaanxi显示文摘Analysis of the fabrication technology of a bronze knife with an iron blade and a bronze Ge with an iron blade, two copper-iron bimetallic wares, unearthed in M27 of Liangdaicun Site, Hancheng of Shaanxi, is performed in this paper by using metallographic, EPMA and AMS-14C dating methods. The micro-structures of the two samples are typical wrought bloomery iron containing a substantial amount of carbon, which is also called carburized steel, made from bloomery iron by cementation in the solid state. The objects can be dated back to the early Spring and Autumn period. This study provides new evidence for understanding the beginning of iron smelting in China. Most of the early known iron wares of the period between the late Western Zhou Dynasty and the early Spring and Autumn were unearthed in the region at the junction of Henan, Shanxi and Shaanxi, at the middle reaches of the Yellow River, suggesting that this region may likely be one of the earliest centers of iron smelting technology in China and deserves further archaeological research. As early iron products were also discovered in the area of the upper reaches of the Yellow River and in Xinjiang, appropriate attention also should be paid to the relationship between these two areas in terms of the origin of iron smelting. | CHEN JianLi YANG JunChang SUN BingJun PAN Yan | 2009 | Science China(Technological Sciences)2009，52，10： | 0 |
| 7 | An analysis method of injection and production dynamic transient flow in a gas field storage facility显示文摘A dynamic transient flow analysis method considering complex factors such as the cyclic injection and production history in a gas field storage facility was established in view of the limitations of the existing methods for transient flow analysis and the characteristics of the injection-production operation of strongly heterogeneous gas reservoirs, and the corresponding theoretical charts were drawn. In addition, an injection-production dynamic transient flow analysis model named 'three points and two stages' suitable for an underground gas storage(UGS) well with alternate working conditions was proposed. The 'three points' refer to three time points during cyclic injection and production, namely, the starting point of gas injection for UGS construction, the beginning and ending points of the injection-production analysis stage;and the 'two stages' refer to historical flow stage and injection-production analysis stage. The study shows that the dimensionless pseudo-pressure and dimensionless pseudo-pressure integral curves of UGS well flex downward in the early stage of the injection and production process, and the dimensionless pseudo-pressure integral derivative curve is convex during the gas production period and concave during the gas injection period, and the curves under different flow histories have atypical features. The new method present in this paper can analyze transient flow of UGS accurately. The application of this method to typical wells in Hutubi gas storage shows that the new method can fit the pressure history accurately, and obtain reliable parameters and results. | WANG Jieming LI Chun SUN Junchang TANG Ligen ZHONG Rong LIU Xianshan ZHENG Shaojing | 2022 | Petroleum Exploration and Development2022，49，1： | 0 |
| 8 | Rational Design of Plasmonic Metal Nanostructures for Solar Energy Conversion显示文摘Plasmonic metal nanostructures,possessing unique surface plasmon resonance properties,show excellent capabilities for light trapping and coupling.On this basis,various plasmonic metal nanostructures offer extraordinary opportunities to promote the conversion efficiency of solar energy to electric energy,hydrogen energy or thermal energy,and so on.In this review article,we highlight a number of recent research achievements on the rational design of plasmonic metal nanostructures so as to maximize the utilization of the entire solar spectrum.Compared with single metal nanoparticles,multiplex(such as multicompositions,sizes,or shapes)nanoparticle structures emphasize advantages in broadening the absorption range and improving light-utilization efficiency.This review concludes with discussions regarding challenges in this research field and proposals of prospects for future directions. | Yawen Wang Junchang Zhang Wenkai Liang He Yang Tianfu Guan Bo Zhao Yinghui Sun Lifeng Chi Lin Jiang | 2022 | CCS Chemistry2022，4，4： | 0 |
| 9 | Simulation of petroleum phase behavior in injection and production process of underground gas storage in a gas reservoir显示文摘On the basis of analyzing the fluid phase behavior during the transformation from gas reservoir to gas storage,a mathematical model and an experimental simulation method are established to describe the oil-gas phase behavior during the whole injection-production process of gas storage.The underground gas storage in the Liaohe Shuang 6 gas reservoir with oil rim is taken as a typical example to verify the reliability and accuracy of the mathematical model and reveal characteristics and mechanisms of fluid phase behavior.In the gas injection stage of the gas storage,the phase behavior is characterized by mainly evaporation and extraction and secondarily dissolution and diffusion of gas in the cap to oil in the oil rim of the reservoir;the gas in gas cap increases in light component content,decreases in contents of intermediate and heavy components,and increases in density and viscosity.The oil of the ring decreases in content of heavy components,increases in contents of light and intermediate components,decreases in density and viscosity,and increases in volume factor and solution gas oil ratio.In the stable operation stage of periodic injection-production of gas storage,the phase behavior shows that the evaporation and extraction capacity of injection gas in the cap to oil rim is weakened step by step,the phase behavior gradually changes into dissolution and diffusion.The gas in gas cap decreases in content of intermediate components,increases in content of light components slowly,and becomes lighter;but changes hardly in density and viscosity.The oil in the oil rim increases in content of heavy components,decreases in content of intermediate components,rises in density and viscosity,and drops in volume factor and solution gas oil ratio. | WANG Jieming SHI Lei ZHANG Yu ZHANG Ke LI Chun CHEN Xianxue SUN Junchang QIU Xiaosong | 2022 | Petroleum Exploration and Development2022，49，6： | 0 |
| 10 | Pore structure evolution of mudstone caprock under cyclic load-unload and its influence on breakthrough pressure显示文摘The pore structure of caprock plays an important role in underground gas storage security, as it significantly influences the sealing capacity of caprock. However, the pore structure evolution of caprock with the cyclic stress perturbations triggered by the cyclic gas injection or extraction remains unclear. In this study, the pore structure changes of mudstone caprock under cyclic loading and unloading were obtained by the nuclear magnetic resonance (NMR) tests system, then the influence of the changes on the breakthrough pressure of caprock was discussed. The results indicated that the pore structure changes are depending on the stress loading-unloading path and stress level. In the first cyclic, at the loading stage, with the increase of confining stress, the NMR T2 spectrum curve moved to the left, the NMR signal amplitude of the first peak increased, while the amplitude of the second peak decreased gradually. This indicated that the larger pores of mudstone are compressed and transformed into smaller pores, then the number of macropores decreased and the number of micro- and mesopores increased. For a certain loading-unloading cycle, the porosity curve of mudstone in the loading process is not coincide with that in the unloading process, the porosity curve in the loading process was located below that in the unloading process, which indicated that the pore structure change is stress path dependent. With the increase of cycle numbers, the total porosity shown an increasing trend, indicating that the damage of mudstone occurred under the cyclic stress load-unload effects. With the increase of porosity, the breakthrough pressure of mudstone decreased with the increase of the cyclic numbers, which may increase the gas leakage risk. The results can provide significant implication for the underground gas storage security evaluation. | Junchang SUN Zhiqiang DONG Sinan ZHU Shifeng TIAN Junping ZHOU | 2023 | Frontiers of Earth Science2023，17，3： | 0 |
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