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Simulation of the Production Performances of Horizontal Wells with a Fractured Shale Gas Reservoir

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Fluid Dynamics & Materials Processing 2023年第7期19卷 1803-1815页

作者： Hongsha Xiao Ruihan Zhang man chen Cui Jing Shangjun Gao Chao chen Huiyan Zhao Xin Huang Bo Kang Sichuan Changning Natural Gas Development Co. Ltd.Chengdu610041China State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China chengdu North Petroleum Exploration and Development Technology Company Limited Chengdu610051China

The production performances of a well with a shale gas reservoir displaying a complex fracture network are *** particular,a micro-seismic cloud diagram is used to describe the fracture network,and accordingly,a production model is introduced based on a multi-scale flow mechanism.A finite volume method is then exploited for the integration of the model *** effects of apparent permeability,conductivity,Langmuir volume,and bottom hole pressure on gas well production are studied *** simulation results show that ignoring the micro-scale flow mechanism of the shale gas leads to underestimating the well gas *** is shown that after ten years of production,the cumulative gas production difference between the two scenarios with and without considering the micro-scale flow mechanisms is 19.5%.The greater the fracture conductivity,the higher the initial gas production of the gas well and the cumulative gas *** larger the Langmuir volume,the higher the gas production rate and the cumulative gas *** the reduction of the bottom hole pressure,the cumulative gas production increases,but the growth rate gradually decreases.

关键词： Shale gas reservoir complex fracture network fractured horizontal well numerical simulation

Value Evaluation Method for Pumped Storage in the New Power System

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Chinese Journal of Electrical Engineering 2023年第3期9卷 26-38页

作者： Yumin Peng Ying Yang man chen Xuelin Wang Yijun Xiong Mu Wang Yikai Li Bushi Zhao CSG PGC Power Storage Research Institute Guangzhou 510635China Sichuan Energy Internet Research Institute Tsinghua UniversityChengdu 610213China

When integrating the generation of large-scale renewable energy,such as wind and solar energy,the supply and demand sides of the new power system will exhibit high *** storage power stations can improve flexible resource supply regulation in the power system,which is the key support and important guarantee for building low-carbon,safe,and efficient new power *** by the current operation mode and electricity price mechanism,the pumped storage power station cost cannot be effectively recovered,and the value cannot be reasonably compensated,resulting in difficult return on investment,single investment subjects,and notable industry development *** to the operational requirements of the new power system,combined with the various functions of pumped storage power stations,the value of pumped storage power stations in the new power system was *** on the equivalent value substitution principle and system operation simulation,a pumped storage value evaluation method for the new power system was *** new power system operation was simulated considering the dispatching model of wind and photovoltaic power abandonment *** the same dispatching objectives,the output of various power sources and power generation operating costs with and without pumped storage power stations in the system were *** economic,safety,social,and environmental benefit perspectives,a quantitative model of the pumped storage power station value was established,covering seven dimensions:asset investment savings,power generation operating cost reduction,flexible adjustment capability improvement,system resilience enhancement,power outage loss reduction,renewable energy consumption,and emission reduction *** on the new power system operation and planning data for southern China,the value of typical pumped storage power stations was analyzed,and the results showed that with new power system’s construction and dev

关键词： Pumped storage new power system evaluation method value substitution operation simulation

Synthesis and Crystal Structure of a Hexameric Organooxotin Cluster from Benzilic Acid

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1249-1253页

作者： chen man-Sheng KUANG Dai-Zhi ZHANG Chun-Hua DENG Yi-Fang LI Wei YANG Ying-Qun Department of Chemistry and Material Science Hengyang Normal University Hengyang 421008 China

The title complex [^n BuSn（O）O2C（OH）CPh2]6.2H2O has been synthesized by the reaction of n-BuSn（O）OH with benzilic acid in 1：1 molar radio and characterized by IR, ^1H NMR spectra and elemental analysis. The crystal structure was determined by X-ray diffraction. It crystallizes in triclinic, space group PI with a = 1.3543（2）, b = 1.4593（2）, c = 1.5293（2） nm, α = 102.075 （2）,β = 115.571 （2）, γ = 93.308（3）°, Z = 1, V = 2.6282（7） nm^3, Mr = 2550.21, Dc = 1.611 g/cm^3,μ = 1.477 mm^-1, F（000） = 1280, R = 0.0309 and wR = 0.0729. The structure shows a distorted octahedral configuration with six-coordination for the central tin atom.

关键词： organooxotin cluster benzilic acid crystal structure synthesis organooxotin cluster benzilic acid crystal structure synthesis

An Efficient and Green Approach to Synthesizing Enamines by Intermolecular Hydroamination of Activated Alkynes

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Chemical Research in Chinese Universities 2015年第2期31卷 212-217页

作者： ZENG Ruijie SHENG Hongting RAO Bo FENG Yan WANG Hao SUN Yehua chen man ZHU manzhou School of Chemistry and Chemical Engineering Anhui University Hefei 230601 P. R. China

An efficient, atom-economic and green approach to synthesizing enamines was developed by intermolecular hydroamination of activated alkynes with high yields under catalyst- and solvent-free conditions. β-Dimethylamino-acrylate derivatives were also obtained with high yields. In the synthetic process of the derivatives, N,N-dimethylformamide（DMF） pretreated with metal Na, was used as reactant instead of dimethylamine gas. The proposed synthetic method can be used for the synthesis of （E）-ethyl-3-（dimethylamino）acrylate（3cl）, and provide a new possible way to the synthesis of Quinolones.

关键词： Enamine Hydroamination Activated alkyne Catalyst-free Solvent-free N,N-Dimethylformamide

Hydraulic Fracture Parameter Inversion Method for Shale GasWells Based on Transient Pressure-Drop Analysis during Hydraulic Fracturing Shut-in Period

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Energy Engineering 2024年第11期121卷 3305-3329页

作者： Shangjun Gao Yang Yang man chen Jian Zheng Luqi Qin Xiangyu Liu Jianying Yang Sichuan Changning Natural Gas Development Company Chengdu610000China National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China

Horizontal well drilling and multi-stage hydraulic fracturing are key technologies for the development of shale gas *** acquisition of hydraulic fracture parameters is crucial for evaluating fracturing effectiveness,optimizing processes,and predicting gas *** paper establishes a transient flow model for shale gas wells based on the boundary element method,achieving the characterization of stimulated reservoir volume for a single *** integrating pressure monitoring data following the pumping shut-in period of hydraulic fracturing for well testing interpretation,a workflow for inverting fracture parameters of shale gas wells is *** new method eliminates the need for prolonged production testing and can interpret parameters of individual hydraulic fracture segments,offering significant advantages over the conventional pressure transient *** practical application of thismethodology was conducted on 10 shale gaswellswithin the Changning shale gas block of Sichuan,*** results show a high correlation between the interpreted single-stage total length and surface area of hydraulic fractures and the outcomes of gas production profile ***,significant correlations are observed between these parameters and cluster number,horizontal stress difference,and natural fracture *** demonstrates the effectiveness of the proposed fracture parameter inversion method and the feasibility of field *** findings of this study aim to provide solutions and references for the inversion of fracture parameters in shale gas wells.

关键词： Well test analysis shale gas hydraulic fracturing boundary element method fracturing effect evaluation

Lymph Node Mapping with Carbon Nanoparticles and the Risk Factors of Lymph Node Metastasis in Gastric Cancer

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2016年第6期36卷 865-870页

作者： Hui WANG man-man chen Guang-sheng ZHU Mao-guang MA Han-song DU Yue-ping LONG Department of Gastrointestinal Surgery Department of Radiology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China

The study aimed to examine the applicability of carbon nanoparticles as a tracer for lymph node mapping and the related factors of lymph node and No.8p subgroup metastasis in patients with gastric *** data of 50 patients with gastric cancer,who had not received treatment preoperatively and underwent gastrectomy in Department of Gastrointestinal Surgery,Wuhan Union Hospital,between October 2014 and August 2015,were retrospectively *** patients were found to have no distant metastasis ***-five out of 50 patients were subjected to lymphatic mapping technique using carbon nanoparticles as the tracer,and the rest 15 cases did not experience the lymphatic mapping and served as *** sensitivity,specificity,false positive rate and false negative rate were calculated according to the number of lymph nodes,and the staining and metastasis condition of lymph *** diagnostic value of carbon nanoparticles on metastatic lymph nodes was *** relationship between the metastasis of lymph nodes or subgroup No.8p lymph nodes and clinicopathologic features was analyzed by χ^2-test or Fisher＇s exact *** patients underwent D2 surgery（lymph node dissection including all the group 1 and group 2 nodes） plus the dissection of the subgroup No.8p lymph *** was found that the average number of harvested lymph nodes in lymphatic mapping technique group（45.7±14.5） was greater than that in control group（39.2±11.7）,but the difference was not significantly different（P=0.138〉0.05）.The success rate,the accuracy,sensitivity,specificity and false negative rate was 97%,57%,28%,62% and 72% *** metastasis of lymph nodes was correlated to the depth of cancer invasion（T stage）（P=0.004〈0.05）,and the metastasis of No.8p lymph nodes was correlated to the extent of lymph node involvement（N stage）（P=0.007〈0.05）.Six cases had lymph node metastasis in subgroup No.8p,and their TNM stages and clinical stages were as follows：T1N2M0 ⅡA

关键词： stomach neoplasms lymph node metastasis carbon nanoparticles lymph node mapping No.8p lymph nodes

Synthesis and Crystal Structure of a Novel manganese Coordination Polymer: 2,5-Bis(4-pyridyl)-3,4-diaza-2,4-hexadiene

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Chinese Journal of Structural Chemistry 2007年第2期26卷 219-223页

作者： chen man-Sheng DENG Yi-Fang ZHANG Chun-Hua KUANG Dai-Zhi FENG Yong-Lan PENG Yun-Lin Department of Chemistry and Materials Science Hen gyan g Normal University Hen gyan g 421008 China

A new manganese coordination polymer 1, [Mn（H2O）4（L）]n（ClO4）2n.2nH2O.3nL （L = 2,5-bis（4-pyridyl）-3,4-diaza-2,4-hexadiene）, has been synthesized and structurally characterized. The crystal structure was determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group Pn with a = 13.9176（8）, b = 15.4754（9）, c = 15.9670（9） A, β = 99.5010（10）°, V = 3391.8（3） ]k3, Z = 2, C56H68C12MnN16O14, Mr= 1315.10, Dc = 1.288 g/cm^3,μ = 0.344 mm^-1, F（000） = 1374, R = 0.0733 and wR = 0.2035. In the crystal the manganese atom is six-coordinated by two nitrogen atoms from 2,5-bis（4-pyridyl）-3,4-diaza-2,4-hexadiene and four oxygen atoms from water molecules, completing an octahedral geometry. The title complex exhibits a novel supramolecular layer architecture sustained by the concurrence of coordination bonds, hydrogen bonds, and π-π stacking interactions.

关键词： manganese complex Schiff bases crystal structure

Scalable and High-Quality Monolayer Graphene Transfer onto Polymer Membranes Assisted by Camphor

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Chinese Journal of Polymer Science 2024年第12期42卷 1986-2001,I0011页

作者： Jun-Kan Yue Jing Liang Qiao-Yu Tan man chen Jing-Wen Li Qing Guo Run-Lai Li Qiang Fu College of Polymer Science&Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu610065China

The quest for scalable integration of monolayer graphene into functional composites confronts the bottleneck of high-fidelity transfer onto substrates,crucial for unlocking graphene’s full potential in advanced *** this,our research introduces the camphor-assisted transfer(CAT)method,a novel approach that surmounts common issues of residue and structural deformation endemic to existing *** in the sublimation dynamics of camphor,the CAT method achieves a clean,contiguous transfer of centimeter-scale monolayer graphene onto an array of polymer films,including ultra-thin polyethylene *** resultant ultrathin graphene-polyethylene(gPE)films,characterized by their exceptional transparency and conductivity,reveal the CAT method’s unique ability to preserve the pristine quality of graphene,underscoring its practicality for preparing flexible transparent electrodes by monolayer ***-depth mechanism investigation into the camphor sublimation during CAT has led to a pivotal realization:the porosity of the target polymer substrate is a determinant in achieving high-quality graphene *** that camphor sublimates initially from the polymer side is crucial to prevent the formation of wrinkles or delamination of *** extensive examination of CAT on a spectrum of commonly used polymer films,including PE,PP,PTFE,PI and PET,we have confirmed this important *** discovery offers crucial guidance for fabricating monolayer graphene-polymer composite films using methods akin to CAT,underscoring the significance of substrate selection in the transfer process.

关键词： Polyethylene Monolayer graphene Camphor Graphene/polymer composites van der Waals interaction

Quantification of Panax notoginseng saponins metabolites in rat plasma with in vivo gut microbiota-mediated biotransformation by HPLC-MS/MS

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Chinese Journal of Natural Medicines 2019年第3期17卷 231-240页

作者： GUO Yin-Ping chen man-Yun SHAO Li ZHANG Wei RAO Tai ZHOU Hong-Hao HUANG Wei-Hua Department of Clinical Pharmacology Xiangya Hospital Central South University Institute of Clinical Pharmacology Hunan Key Laboratory of Pharmacogenetics Central South University Department of Pharmacognosy School of Pharmacy Hunan University of Chinese Medicine

Panax notoginseng saponins(PNS) are the major components of Panax notoginseng, with multiple pharmacological activities but poor oral bioavailability. PNS could be metabolized by gut microbiota in vitro, while the exact role of gut microbiota of PNS metabolism in vivo remains poorly understood. In this study, pseudo germ-free rat models were constructed by using broad-spectrum antibiotics to validate the gut microbiota-mediated transformation of PNS in vivo. Moreover, a high performance liquid chromatography-electrospray ionization tandem mass spectrometry(HPLC-ESI-MS/MS) was developed for quantitative analysis of four metabolites of PNS, including ginsenoside F1(GF1), ginsenoside Rh2(GRh2), ginsenoside compound K(GCK) and protopanaxatriol(PPT). The results showed that the four metabolites could be detected in the control rat plasma, while they could not be determined in pseudo germ-free rat plasma. The results implied that PNS could not be biotransformed effectively when gut microbiota was disrupted. In conclusion, gut microbiota plays an important role in biotransformation of PNS into metabolites in vivo.

关键词： Panax notoginseng Gut microbiota HPLC-MS/MS Saponins Ginsenoside compound K Protopanaxatriol