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Synthesis and Structure of a New Dinuclear Uranyl Complex

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Chinese Chemical Letters 2002年第6期13卷 583-586页

作者： Shang Ying LIU Yong Sheng LIU wen xing zhang Chang Qin MA De Hua JIANG College of Chemistry and Chemical Engineering Shandong UniversityJinan 250100

With a heptadentate compartmental Schiff-base ligand H3L (1, 3-di[o-(salicylimino) ph- enoxyl]-2-propanol), a new binuclear diuranyl complex [(UO2)2L(OH)]?DMF, C38H45N5O13U2, was synthesized and the crystal structure was determined by X-ray diffraction techniques. The coordination geometry are two pentagonal bipyramids. In each pentagon four kinds of U-O (phenoxido, hydroxo, alkoxo and ether oxo) bonds are discussed.

关键词： Dinuclear uranyl complex synthesis structure.

Distribution and resource evaluation of natural gas hydrate in South China sea by combing phase equilibrium mechanism and volumetric method

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Petroleum Science 2022年第1期19卷 26-36页

作者： Tong Wang Tao Hu Xiong-Qi Pang xing-wen zhang Xiao-Han Liu Zhi Xu En-Ze Wang Zhuo-Ya Wu State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China School of Earth&Space Sciences Peking UniversityBeijing100871China Research Institute of Petroleum Exploration and Development PetroChina Company LimitedBeijing100083China

China Geological Survey conducted the second trial production of natural gas hydrate(NGH)in the Shenhu Area in South China Sea(SCS)from 2019 to *** with the first trial production in 2017,the second trial showed significantly increased daily gas production and total gas production,and removed some technical obstacles for large-scale NGH resource developments in the ***,current NGH resource evaluation in the SCS is still at the stage of prospective gas content assessment,which is unable to guide further NGH exploration and *** study utilized the hydrate phase balance to delineate the NGH distribution range and effective thickness and volumetric method to evaluate NGH *** on the latest exploration and production data from the Shenhu Area,Monte Carlo simulation was performed to calculate the NGH resource amount with different *** assuming a 50%cumulative probability,the in-situ NGH resources in the SCS was estimated to be11.7×10^(12)m^(3) and the recoverable NGH resources was 2.8×10^(12)m^(3).These results will provide a more reliable resource basis for China to formulate comprehensive development strategies for oil and gas exploration in the SCS.

关键词： South China Sea Oil and gas resource Natural gas hydrate In-situ resource Recoverable resources

Evaluation of natural gas hydrate resources in the South China Sea using a new genetic analogy method

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Petroleum Science 2022年第1期19卷 48-57页

作者： Xiao-Han Liu Tao Hu Xiong-Qi Pang Zhi Xu Tong Wang xing-wen zhang En-Ze Wang Zhuo-Ya Wu State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China School of Earth&Space Sciences Peking UniversityBeijing100871China Research Institute of Petroleum Exploration&Development CNPCBeijing100083China

Natural gas hydrate(NGH)has attracted much attention as a new alternative energy ***,evaluations of global NGH resources in the past few decades have casted a decreasing trend,where the estimate as of today is less than one ten-thousandth of the estimate forty years *** NGH researches in China started relatively late,but achievements have been made in the South China Sea(SCS)in the past two ***-five studies had been carried out to evaluate NGH resource,and results showed a flat trend,ranging from 60 to 90 billion tons of oil equivalent,which was 2-3 times of the evaluation results of technical recoverable oil and gas resources in the *** big difference is that the previous 35 group of NGH resource evaluations for the SCS only refers to the prospective gas resource with low grade level and high uncertainty,which cannot be used to guide exploration or researches on development *** on the analogy with the genetic mechanism of conventional oil and gas resources,this study adopts the newly proposed genetic method and geological analogy method to evaluate the NGH *** show that the conventional oil and gas resources are 346.29×10^(8)t,the volume of NGH and free dynamic field are 25.19×10^(4)km^(3) and(2.05-2.48)×10^(6)km^(3),and the total amount of in-situ NGH resources in the SCS is about(4.47-6.02)×10^(12)m^(3).It is considered that the resource of hydrate should not exceed that of conventional oil and gas,so it is 30 times lower than the previous *** study provides a more reliable geological basis for further NGH exploration and development.

关键词： South China Sea Natural gas hydrate Natural gas hydrate resources Conventional oil and gas resources Genetic method Analogy method

Reduction of global natural gas hydrate(NGH)resource estimation and implications for the NGH development in the South China Sea

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Petroleum Science 2022年第1期19卷 3-12页

作者： Xiong-Qi Pang Cheng-Zao Jia zhang-xing Chen He-Sheng Shi Zhuo-Heng Chen Tao Hu Tong Wang Zhi Xu Xiao-Han Liu xing-wen zhang En-Ze Wang Zhuo-Ya Wu Bo Pang State Key Laboratory of Petroleum Resources and Prospecting Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China China National Petroleum Corporation Beijing100007China Chemical and Petroleum Engineering Schulich School of EngineeringUniversity of CalgaryCalgaryT2N 1N4Canada Shenzhen Branch of China National Offshore Oil Corporation Ltd. GuangzhouGuangdong 510240China Geological Survey of Canada Natural Resources CanadaCalgaryT2L 2A7Canada School of Earth&Space Sciences Peking UniversityBeijing100871China

There have been at least 29 groups of estimates on the global natural gas hydrate(NGH)resource since1973,varying greatly with up to 10,000 times and showing a decreasing trend with *** the South China Sea(SCS),35 groups of estimations were conducted on NGH resource potential since 2000,while these estimates kept almost the same with time,varying between 60 and 90 billion tons of oil equivalent(toe).What are the key factors controlling the variation trend?What are the implications of these variations for the NGH development in the world and the SCS?By analyzing the investigation characteristics of NGH resources in the world,this study divided the evaluation process into six stages and confirmed four essential factors for controlling the variations of *** indicated that the reduction trend reflects an improved understanding of the NGH formation mechanism and advancement in the resource evaluation methods,and promoted more objective evaluation ***,the analysis process and improved evaluation method was applied to evaluate the NGH resources in the SCS,showing the similar decreasing trend of NGH resources with *** utilizing the decreasing trend model,the predicted recoverable resources in the world and the SCS are(205-500)×10^(12)m^(3)and(0.8-6.5)×10^(12)m^(3),respectively,accounting for 20%of the total conventional oil and gas *** NGH resource in the SCS is only about 4%-6%of the previous estimates of 60-90 billion *** extracted completely,it only can support the sustainable development of China for 7 years at the current annual consumption level of oil and *** cannot be the main energy resource in future due to its low resource potential and lack of advantages in recovery.

关键词： Natural gas hydrate Resource evaluation South China Sea Global NGH resource Reduction trend in NGH resource

Synthesis and Structure of Vanadium-barium Complex of 2,4,6-Tripicolinato with 20-Member Macrocyclic Cavities

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Chinese Chemical Letters 2003年第7期14卷 740-743页

作者： Yu Xia DIAO Yang TIAN Si Hui ZHAN wen xing zhang Xiu Ling JIAO Dai Rong CHEN School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100

A new heteronuclear complex, dimer [(2-OH2)2Ba2(H2O)4][VO2(tpa)]24H2O (tpa: 2,4,6-tripicolinate trianion), was synthesized and structurally determined by X-ray diffraction technique where all hydrogen atoms have been located directly. The coordination geometry of V(V) ion is a distorted trigonal bipyrimid and that of Ba(II) ion is a capped square antiprism. One 2-O bridging bond and two hydrogen bonds act between the coordination geometries. A 1-D extended porous construction containing 20-member cavities is observed in the crystal.

关键词： Heteronuclear vanadium-barium complex synthesis cavity structure.

Structure of Complex [Ni_2L_2](py)_2(H_2O)_2(L=1,3-Di[o-(o-vanillideneimino) phenoxo]-2-propanol Dianion) with New Nucleating Ligand

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Chinese Chemical Letters 1998年第5期9卷 483-485页

作者： wen xing zhang Shang Ying LIU Chang Qin MA De Hua JLANG(School of Chemistry, Shandong University, Jinan 250100) School of Chemistry Shandong University Jinan 250100 China

The title dinuclear complex structUre was determined by X-ray diffraction.

关键词： dinuclear Ni (Ⅱ) complex dinucleating Schiff-base ligand structure

Evaluation of natural gas hydrate resources in the South China Sea by combining volumetric and trend-analysis methods

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Petroleum Science 2022年第1期19卷 37-47页

作者： xing-wen zhang Tao Hu Xiong-Qi Pang Yao Hu Tong Wang En-Ze Wang Zhi Xu Xiao-Han Liu Zhuo-Ya Wu Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China CNOOC International Limited Beijing 100029China School of Earth&Space Sciences Peking UniversityBeijing 100871China Research Institute of Petroleum Exploration and Development PetroChina Company LimitedBeijing 100083China

Natural gas hydrate(NGH),considered as a type of premium energy alternative to conventional hydrocarbons,has been broadly *** estimate of the total NGH resources in the world has decreased by more than 90%since the first evaluation in *** and geophysical conditions of the South China Sea(SCS)are favorable for the formation of NGH,which has been proved by drilling results up to *** recoverability of the NGH in the SCS has been confirmed by the production tests using both vertical and horizontal *** 2001,35 estimates of NGH resources in the SCS have been made,with relatively stable results varying between 600 and 900×109 ton oil *** these estimations,the volumetric method was commonly adopted,but the geological conditions,the migration-accumulation mechanisms of NGH,and the practical recoverability were not *** estimates cannot be regarded as evaluated resources according to the international resource evaluation standards,but are at most about prospective gas content of NGH,thus inefficient for guiding explorations and *** solve these problems,this study divides the past NGH surveys in the SCS into seven stages,acquires key geological parameters of every stage based on previous studies and analogy with other areas,evaluates the NGH resources of these seven stages by using the volumetric method,then adopts a new trend-analysis method to simulate the downward trend of these estimates,and finally predicts the NGH resources in the SCS at 2025 and *** downward trend is because of the continuous improvement of NGH understanding over time,which is consistent with the trend of global NGH *** the present stage(from 2019 to 2021),the average technically recoverable resource(ATRR)is 7.0×10^(12)m^(3),and the estimates of 2025 and 2030 ATRR are 6.46×10^(12)m^(3) and 4.01×10^(12)m^(3)respectively,with a difference of less than 40%.Therefore,it can be inferred that the ATRR of NGH in the SCS is between

关键词： Resource evaluation Natural gas hydrates The South China Sea Volumetric method Trend-analysis method

Research progress and challenges of natural gas hydrate resource evaluation in the South China Sea

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Petroleum Science 2022年第1期19卷 13-25页

作者： Zhi Xu Tao Hu Xiong-Qi Pang En-Ze Wang Xiao-Han Liu Zhuo-Ya Wu Di Chen Chang-Rong Li xing-wen zhang Tong Wang State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China School of Earth&Space Sciences Peking UniversityBeijing100871China Research Institute of Petroleum Exploration&Development CNPCBeijing100083China

As an efficient clean energy,natural gas hydrate(NGH)has become a hot topic in recent ***1990 s,China has made great achievements and progress in NGH exploration in the South China Sea(SCS),including determination of the favorable distribution areas and favorable strata thickness,identification of the dual source for accumulation,evaluation of the prospective gas contents,verification of the widespread existence,and confirmation of the technical recoverability of NGH ***,there are three major challenges in the NGH ***,all the 24 national key and major projects in the SCS focused on trial production engineering and geological engineering in the past 20 years,while 8 of the 10 international NGH research projects focused on resource ***,resource evaluation methods are outdated and some parameter selection are ***,the existing resource evaluation results are low-level with a great uncertainty,and cannot be used to guide NGH exploration and production or strategic *** improve the evaluation of NGH resources in the SCS,future researches should focus on four aspects:(1)improve the research on the criterion of the objective existence of NGH and the method of prediction and evaluation;(2)apply new theories and methods from the global NGH research;(3)boost the research on the difference and correlation of the conditions of hydrocarbon migration and accumulation in different basins;(4)innovate the theory and method of NGH resource potential evaluation.

关键词： South China Sea Natural gas hydrate Oil and gas resource evaluation Comprehensive exploration of oil and gas Oil and gas development strategy

Rhodium-Catalyzed N-Arylation Addition of Arylboronic Acids to Ketimines

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Chinese Journal of Chemistry 2024年第18期42卷 2243-2248页

作者： Xue-Wei Qian xing-wen Sun Department of Chemistry Fudan University220 Handan RoadShanghai 200433China

Herein,we report rhodium catalyzed N-arylation via addition of arylboronic acids to electron-deficientα-iminoesters which can be prepared in high efficiency by using easily accessible B-carbonyl *** reaction is highly regiospecific to achieve the N-aryl addition efficiently with up to 99%yield under mild *** corresponding product can be further efficiently converted into indoles andaseries of other important building blocks.

关键词： Rhodium catalyzed N-Arylation addition Amines Umpolung Indole C-C coupling