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| 1 | Hydrocarbon sources and stages of reservoir formation in Kuqa depression, Tarim Basin显示文摘Kuqa depression bears not only plenty ofnatural gas, but also a large amount of condensate and smallquantity of crude oil. Based on the geochemical correlationbetween the Jurassic and Triassic terrestrial hydrocarbonsource rock, this paper confirms that the natural gas in Kuqadepression belongs to coal-type gas and the main gas sourcerock is attributed to the middle to lower Jurassic coal seriesformation, while the main oil source rock is the upper Tri-assic lacustrine mudstone. The authors indicated that Kuqadepression was slowly subsided in Mesozoic, but rapidlywent down in Late Tertiary, which made the Jurassic andTriassic source rock suddenly deep-buried and rapidlyevolved to high and over-mature phase since 5 Ma. TheTriassic source rock is postponed to the Early Miocene dur-ing 23-12 Ma when entering the oil-generating peak, whilethe Jurassic is suspended to the latest 5 Ma, especially since2.5 Ma to the dry gas-generating period, which is one of thecharacteristics of the source rock thermal evolution in Kuqadepression. This paper presents a two-stage trapping andlate gas trapping model in Kuqa depression whose charac-teristics are: The main oil and gas reservoirs have differentsources. The oil reservoir is formed early while the gas res-ervoir is formed lately. During the early stage, it, mainly asoil, takes long distance lateral migration, while in the laterstage, it, mainly as gas, takes the vertical migration and alsohas lateral migration. The trap formed in different time onthe south and north sides of the depression and evolved intoa distributional pattern with oil in the south part and gas inthe north, also oil on the outer ring and gas on the inner ring.This paper points out that the late trapping of the naturalgas in Kuqa depression is favorable for the preservation oflarge gas fields. | LIANG Digang ZHANG Shuichang ZHAO Mengjun WANG Feiyu | 2002 | Chinese Science Bulletin2002，47，S1： | 34 |
| 2 | Coalbed methane genesis, occurrence and accumulation in China显示文摘Coalbed methane (CBM) is an important type of unconventional gas. Commercial development of CBM in America has been very successful since the 1980s. The CBM industry in Australia and Canada has developed rapidly during the last decade. Commercial development of CBM in China started in the 1990s, and has made great progress. The geological theory of CBM in China has achieved great advancement in genesis, occurrence and accumulation. On the aspect of CBM genesis, five CBM genetic types (primary biogenic gas, secondary biogenic gas, thermal degradation gas, pyrolysis gas and mixed gas) are identified by studying the geochemical characteristics of CBM, and a tracing indicator system is established. The discovery of secondary biogenic gas in medium-high rank coal reservoirs has widened the potential of CBM resources. On the aspect of CBM occurrence, the gas adsorption regulation under combined action of temperature and pressure is revealed by conducting adsorption experiments of different coal ranks under varying temperature and pressure conditions. Besides, by applying the adsorption potential theory in CBM research, the adsorption model under combined action of temperature and pressure is established. The new model can predict CBM resources accurately, and overcome the limitation of the traditional Langmuir model which uses just a single factor to describe the adsorption characteristics of deep buried coal. On the aspect of CBM accumulation, it is proposed that there are three evolutionary stages during CBM accumulation, including gas generation and adsorption, unsaturated gas adsorption, gas desorption-diffusion and preservation. Controlled by tectonic evolution, hydrodynamics and sealing conditions, CBM tends to be regionally enriched in synclines. Advances in geological theory of CBM in China can not only improve understanding of natural gas, but also provide new ideas for further exploration of CBM. | Song Yan Liu Shaobo Zhang Qun Tao Mingxin Zhao Mengjun Hong Feng | 2012 | Petroleum Science2012，9，3： | 29 |
| 3 | Controlling factors for large gas field formation in thrust belt of Kuqa coal derived hydrocarbon foreland basin显示文摘Kuqa depression is a foreland basin developedwith Mesozoic-Triassic-Jurassic coal-bearing formation. Theresearch results of the coal-derived hydrocarbon forelandbasins in Kuqa depression indicated that the coal-bearingformation can be the rich sources for generating gas becauseof their thickness and rich source rocks with gas-generatingpredominant kerogen. Although the foreland thrust beltmainly acting in compression is very complicated, integrallarge structural traps can be formed. Moreover, the thrustbelt can act as the passage for communication with deepsource rocks. The high quality gypsolish and gypseous mud-stone cap rock developed in the upper formation is the keyfor the formation of the large gas field. The late formation ofreservoirs in the large gas fields depended on the hydrocar-bon-generating history controlled by the foreland basin andthe developing process of foreland thrust belt. | SONG Yan JIA Chengzao ZHAO Mengjun TIAN Zuoji | 2002 | Chinese Science Bulletin2002，47，S1： | 20 |
| 4 | Geochemical characteristics and formation process of natural gas in Kela 2 gas field显示文摘On the basis of a large amount of natural gascomponents and the carbon isotope as well as some otheranalysis data in Kela 2 gas field, the geochemical character-istics, source, origin, and formation process of natural gashave been discussed. The components of gas in the field tendto be 'dry', and the drying coefficient is close to 1.0. Thecarbon isotope tends to be heavier, for instance, the averageof δ13C1 is -27.36‰ and that ofδ13C2 is -18.5‰. Compre-hensive analysis shows that humic natural gas in the Kuqapetroleum system comes mainly from Triassic and Jurassicsource rocks, and the contribution of Jurassic source rocks tothe pool maybe is more than that of Triassic rocks. The maincause that the gas tends to be dry and bears heavier isotopecomposition lies in the fact that Kela 2 natural gas is the ac-cumulation of late production of humic source rocks, and itis affected by the abnormal high pressure as well. Consider-ing the hydrocarbon generating and structural history, wecan regard the gas pool formation processes as twice fillingand twice adjusting (destroying), that is, the filling anddestroying process in the early Himalayan movement and thefilling and adjusting in the late Himalayan movement. | ZHAO Mengjun LU Shuangfang WANG Tingdong LI Jian | 2002 | Chinese Science Bulletin2002，47，S1： | 20 |
| 5 | The influence of tectonic evolution on the accumulation and enrichment of coalbed methane (CBM)显示文摘The current accumulation and enrichment of CBM reservoir is a result of the preservation and destruction of former CBM, after the superposing evolution of reversing-and-uplifting and the subsequent evolution within the coal-bearing basin. The critical moment of the CBM reservoir formation is the time when the burying depth of the overlying net thickness amounts to the least in geological history after the gas generation of coal beds. Except the coal-bearing basins of lower metamorphism, most basins suffered the evolution stage of reversion and uplift. The formation of the CBM reservoir is controlled by the beginning and lasting time, and the intensity of reversing and uplifting. The tectonic evolution after reversing and uplifting also affects the accumulation of CBM in coal-bearing basin. The CBM constantly dissipates in the area of chronically uplifting and de-nudating. The area developed overlying sedimentation is advantageous to the preservation of CBM, but also can lead to the reduction of CBM saturation. | SONG Yan ZHAO Mengjun LIU Shaobo WANG Hongyan CHEN Zhenhong | 2005 | Chinese Science Bulletin2005，50，S1： | 13 |
| 6 | Geochemical features and genesis of the natural gas and bitumen in paleo-oil reservoirs of Nanpanjiang Basin, China显示文摘Bitumen from the Nanpanjiang Basin occurs mainly in the Middle Devonian and Upper Permian reef limestone paleo-oil reservoirs and reserves primarily in holes and fractures and secondarily in minor matrix pores and bio-cavities. N2 is the main component of the natural gas and is often associated with pyrobitumen in paleo-oil reservoirs. The present study shows that the bitumen in paleo-oil reservoirs was sourced from the Middle Devonian argillaceous source rock and belongs to pyrobitumen by crude oil cracking under high temperature and pressure. But the natural gas with high content of N2 is neither an oil-cracked gas nor a coal-formed gas generated from the Upper Permian Longtan Formation source rock, instead it is a kerogen-cracked gas generated at the late stage from the Middle Devonian argilla- ceous source rock. The crude oil in paleo-oil reservoirs completely cracked into pyrobitumen and methane gas by the agency of hugely thick Triassic deposits. After that, the abnormal high pressure of methane gas reservoirs was completely destroyed due to the erosion of 2000--4500-m-thick Triassic strata. But the kerogen-cracked gas with normal pressure was preserved under the relatively sealed condition and became the main body of the gas shows. | ZHAO MengJun ZHANG ShuiChang ZHAO Lin DA Jiang | 2007 | Science China Earth Sciences2007，50，5： | 11 |
| 7 | The historical and current research progress on jujube–a superfruit for the future显示文摘Jujube(Ziziphus jujuba Mill.),or Chinese date,is the most important species of Rhamnaceae,a large cosmopolitan family,and is one of the oldest cultivated fruit trees in the world.It originates from the middle and lower reaches of the Yellow River,the‘mother river’of the Chinese people.It is distributed in at least 48 countries on all continents except Antarctica and is becoming increasingly important,especially in arid and semiarid marginal lands.Based on a systematic analysis of the unique characteristics of jujube,we suggest that it deserves to be recognized as a superfruit.We summarized historical research achievements from the past 3000 years and reviewed recent research advances since 1949 in seven fields,including genome sequencing and application,germplasm resources and systematic taxonomy,breeding and genetics,cultivation theory and techniques,pest control,postharvest physiology and techniques,and nutrition and processing.Based on the challenges facing the jujube industry,we discuss eight research aspects to be focused on in the future. | Mengjun Liu Jiurui Wang Lili Wang Ping Liu Jin Zhao Zhihui Zhao Shengrui Yao Florin Stănică Zhiguo Liu Lixin Wang Changwei Ao Li Dai Xiansong Li Xuan Zhao Chunxiang Jia | 2020 | Horticulture Research2020，7，1： | 10 |
| 8 | Can Cultural Affinity Promote Trade ? HSK Test Data from the Belt and Road Countries显示文摘 | Mengjun Xie | 2018 | China & World Economy2018，26，3： | 8 |
| 9 | Control of neotectonic movement on hydrocarbon accumulation in the Kuqa Foreland Basin,west China显示文摘Neotectonic movement refers to the tectonic movement that has happened since the Cenozoic,which is the latest movement. It has the most important influence on the basins in west China,especially on the hydrocarbon accumulation in the western foreland basins. We determined the time of neotectonic movement in the Kuqa Foreland Basin,which began from the Neogene,and analyzed the patterns of movement,which were continuous and fast subsidence in the vertical direction and intense lateral compression. The structure styles are that the faulting is weakened and the folding is strengthened gradually from north to south. We studied the control of neotectonic movement on the hydrocarbon accumulation process and model in the Kuqa Foreland Basin with basin simulation technique. The largest subsidence rate of the Kuqa Foreland Basin reached 1,200 m/Ma during the neotectonic movement,leading to rapid maturing of source rock within 5 Ma and a large quantity of hydrocarbon being generated and expelled. The thick neotectonic strata can form high quality reservoirs with the proved gas and oil reserves accounting for 5% and 27% of the total reserves,respectively. 86% of the structural traps were formed in the neotectonic movement period. The faults formed during the neotectonic movement serve as important migration pathways and they exist in the region where the hydrocarbon reservoirs are distributed. Abnormally high pressure caused by the intense lateral compression,thick neotectonic strata deposition and rapid hydrocarbon generation provide driving force for hydrocarbon migration. The accumulation elements match each other well over a short period,leading to many large gas fi elds formed later in the Kuqa Foreland Basin. | Jiang Zhenxue Li Lianxia Song Yan Tian Fenghua Zhao Mengjun Wang Haijiang Zhao Zhenxing | 2010 | Petroleum Science2010，7，1： | 6 |
| 10 | Accumulation process and model for the Ordovician buried hill reservoir in the western Lunnan area,the Tarim Basin显示文摘The Ordovician buried hill reservoir in the western Lunnan area, a type of dissolved fracture and cavernous reservoir, is mainly composed of heavy oil. The oil is the mixture sourcing from the Middle-Lower Cambrian and Middle-Lower Ordovician, with three stages of pool forming process: (1) the destruction and parallel migration/accumulation during the late Caledonian to early Hercynian; (2) the oil and gas accumulation during the late Hercynian characterized by adjustment upward along faults and parallel migration/accumulation; (3) the formation of heavy oil during the latest Hercynian. The Ordovician buried hill reservoir is affected by the diffusion of light oil and gas but had no hydrocarbon charging during the late Yanshan period to Himalayan period, but in this period, formed the association of heavy oil and dissolved gas cracked from crude oil with dry coefficient of 0.91-0.96. The study on accumulation process of the Ordovician buried hill reservoir has important implications for the exploration potential of early oil and gas accumulation in the cratonic area of the Tarim Basin. | ZHAO MengJun PAN WenQing HAN JianFa LIU ShaoBo QIN ShengFei ZHANG BaoMin | 2007 | Chinese Science Bulletin2007，52，A01： | 6 |
| 11 | Determination of Three Kinds of Polyether Drug Residues in Eggs by QuEChERS dSPE EMR-Lipid-LC/MS/MS显示文摘[Objectives] This study was conducted to establish an LC-MS/MS method for the determination of three kinds of polyether residues in eggs with QuEChERS dSPE EMR-Lipid as a pretreatment method,which was established according to Agilent Bond Elut enhanced lipid removal EMR-Lipid technology.[Methods]Egg was extracted by acidified acetonitrile,purified by Bond Elut EMR-Lipid QuEChERS,and detected by HPLC-MS/MS. [Results]The three kinds of polyether residues had good linear relationships in the range of 2. 0-100 μg/L with peak areas,r > 0. 999. The recoveries ranged from 84. 6% to 107. 0%.[Conclusions]The method is convenient and accurate,and the quantitative results are accurate and reproducible. It is suitable for the determination of the three kinds of polyether residues in eggs. | Guodong ZANG Jingwen FU Qinzhan YANG Zijing HUANG Mengjun CHEN | 2018 | Agricultural Biotechnology2018，7，1： | 6 |
| 12 | INVESTIGATION OF RATTLING THRESHOLD IN GEAR SYSTEM显示文摘A lumped mass gear-rattling model with backlash is established by considering the time varying mesh stiffness, composite transmission error and the torque fluctuation. Based on the principle that no separation will occur if the response amplitude is not larger than the static response,the threshold is obtained by theoretical derivation. The validity of the theoretical derivation is verified by the numerical method. The results show that the time-varying mesh stiffness has little effect on the threshold. When the exciting frequency is less than the system natural frequency, the theoretical agrees well with the numerical one. The higher the exciting frequency or the smaller the average input torque is, the easier the separation will occur. When the exciting frequency is larger than the natural frequency by a certain value, the theoretical threshold does not agree with the numerical results. The numerical results show that the motion state will change from the meshing state to the separating state directly. The phenomenon that the gear pair sometimes separates and sometimes meshes occurs only when the exciting frequency is smaller. | Dong Haijun Shen Yunwen Liu Mengjun Wang Sanmin | 2005 | Chinese Journal of Mechanical Engineering2005，18，4： | 6 |
| 13 | In Vivo Fast Induction of Homogeneous Autopolyploids via Callus in Sour Jujube(Ziziphus acidojujuba Cheng et Liu)显示文摘Polyploidization has been demonstrated as a very effective approach in fruit tree improvement.Sour jujube(Ziziphus acidojujuba Cheng et Liu) is a promising diploid wild,traditional fruit species(2n = 2x = 24) that is rich in vitamin C,which is the main rootstock of Chinese jujube(Z.jujuba Mill.).The novel method we developed for rapid in vivo induction of homogeneous autopolyploids(IVIHA) via callus in Chinese jujube was first applied and further optimized in sour jujube.Under optimized conditions,an average of one pure autotetraploid shoot could be regenerated from one treated branch,thereby indicating a relatively high efficiency rate.A total of 9 pure autotetraploid genotypes were created,and one of these was released as a new cultivar named ‘Zhuguang' in 2015.Moreover,unexpected octoploids and hexaploids were also simultaneously created and detected.The leaves of tetraploids were thicker,broader,and darker in color than those of the original diploids,whereas the leaf sizes of octoploids were much smaller compared to that of diploids.However,stoma size increased with the occurrence of ploidy,mainly from diploid to octoploid.The well grown ploidies of jujube included diploids,triploids,and tetraploids.Anatomical observation indicated that adventitious buds/shoots emerged from the callus that formed on the cut,which was then followed by the development of connective vascular tissues between the adventitious bud and the stock plant tissue.This study demonstrates the universality of the IVIHA method that was initially developed in Chinese jujube,as well as provides a foundation for high-efficiency pure polyploid induction in sour jujube. | SHI Qinghua LIU Ping LIU Mengjun WANG Jiurui ZHAO Jin ZHAO Zhihui DAI Li | 2016 | Horticultural Plant Journal2016，2，3： | 5 |
| 14 | EBV-Induced Human CD8^+ NKT Cells Synergise CD4^+ NKT Cells Suppressing EBV-Associated Tumours upon Induction of Thl-Bias显示文摘 | Wei Xiao Li Li Rui Zhou Ruijing Xiao Yujuan Wang Xiang Ji Mengjun Wu Lan Wang Wei Huang Xiaoling Zheng Xinti Tan Lang Chen Tao Xiong Jie Xiong Youxin Jin Jinquan Tan Yuling He | 2009 | Cellular & Molecular Immunology2009，6，5： | 5 |
| 15 | A Day-ahead Economic Dispatch Method Considering Extreme Scenarios Based on Wind Power Uncertainty显示文摘As the intermittency of wind power is a growing concern in the day-ahead economic dispatch,this paper proposes a day-ahead economic dispatch method considering extreme scenarios of wind power by using an uncertainty set.The uncertainty set inspired by robust optimization is used to describe wind power intermittency in this paper.Four extreme scenarios based on the uncertainty set are formulated to represent the worst cases of wind power fluctuation.An economic dispatch method considering the costs of both load shedding and wind curtailment is proposed.The economic dispatch model can be easily solved by a quadratic programming method owing to the introduction of four extreme scenarios and the uncertainty set of wind power.Simulation is done using the IEEE 30-bus system and the results verify the effectiveness of the proposed method. | Jian Xu Bao Wang Yuanzhang Sun Qi Xu Ji Liu Huiqiu Cao Haiyan Jiang Ruobing Lei Mengjun Shen | 2019 | CSEE Journal of Power and Energy Systems2019，5，2： | 5 |
| 16 | Differentially Private Spatial Decompositions for Geospatial Point Data显示文摘Technological advancements in data analysis and data releasing have put forward higher security requirements, such as privacy guarantee and strictly provable security, this new area of research is called differential privacy. As for geospatial point data, the exiting methods use the tree structure to split the data space to enhance the data utility and usually adopt uniform budgeting method. Different from this, we propose a novel non-uniform allocation scheme for privacy budget which is a parameter to specify the degree of privacy guarantee. Firstly, the spatial data is indexed by quadtree, then, different privacy budget is allocated to each layer of quadtree using Fibonacci series features, and we designate this budgeting method as Fibonacci allocation. Experimental results show that Fibonacci allocation is significantly more accurate in data queries than the state-of-the-art methods under the same privacy guarantee level and fits for arbitrary range queries. Furthermore, data utility can be improved by post-processing and threshold determination. | WANG Jun LIU Shubo LI Yongkai CAO Hui LIU Mengjun | 2016 | China Communications2016，13，4： | 5 |
| 17 | Characteristics,genesis and accumulation history of natural gas in Hetianhe gasfield,Tarim Basin,China显示文摘Hetianhe gasfield in Bachu region of the Tarim Basin is mainly composed of three reservoir-caprock assembly,namely regional caprock of upper mudstone,middle mudstone and lower mudstone of the Carboniferous and reservoir of Bachu bioclastic limestone,glutenite and the Ordovician carbonate buried hill.Natural gas in Hetianhe gasfield sourced from the Cambrian source rock.It is thought that gases in Ma4 well block in the east of Hetianhe gasfield are mainly crude-oil cracked gases,while those in Ma3 and Ma8 well blocks in the west are the mixture gases of kerogen cracked gases and crude-oil cracked gases.Natural gas is rich in H2S and accumulated in multiply stages as the result of TSR.The accumulation history is divided into three stages,namely accumulation and breakage in the late Caledonian-early Hercynian,migration and dissipation in the late Hercynian and accumulation in Himalayan. The main accumulation of reformed gas reservoir is in Himalayan. | WANG ZhaoMing 1 ,WANG QingHua 1 ,ZHAO MengJun 2 ,LI Yong 1 &XU ZhiMing 3 1 Tarim Oilfield Company,PetroChina,Kuerle 841000,China 2 Research Institute of Petroleum Exploration&Development,PetroChina,Beijing 100083,China 3 Southwest Petroleum Institute,Nanchong 637001,China | 2008 | Science China Earth Sciences2008，51，S1： | 4 |
| 18 | Formation condition of deep gas reservoirs in tight sandstones in Kuqa Foreland Basin显示文摘Due to the high expense of deep oil and gas exploration,prediction of gas-bearing properties before drilling is crucial for deep gas reservoir of tight sandstone.Deep tight sandstone gas fields in Kuqa Foreland Basin are characterized by high abundance,high gas saturation,high pressure,high and stable yield,which belong to high-efficiency tight gas reservoir.Based on theoretical analysis of controlling factors and mechanisms of gas-bearing properties for tight sandstone gas reservoir,and taking tight sandstone gas fields with high effectiveness such as Dibei,Keshen and Dibei gas fields in Kuqa Foreland Basin as examples,formation condition and mechanism of high-efficiency tight sandstone gas reservoir in Kuqa area are studied through a comparative analysis of typical tight sandstone gas reservoir in Sichuan Basin and Ordos Basin.The results show that the formation condition of deep gas reservoir of tight sandstone in Kuqa foreland basin includes four factors:i.e.,overpressure gas charging,fracture development,“early-oil and late-gas”accumulation process and favorable preservation condition.The overpressure gas charging and fracture development are the most important factors for formation of high-efficiency tight gas reservoirs in Kuqa Foreland Basin.High-quality source rocks,high sourcereservoir pressure difference,and overpressure filling induced thereby are preconditions for formation of tight sandstone with high gas saturation.The fracture development controls gas migration,accumulation,and high yield of tight sandstone gas reservoir.The reservoir wettability changed by the early oil charging is beneficial to late natural gas charging,and the preservation condition of high-quality gypsum cap rocks is the key factor for gas reservoirs to maintain overpressure and high gas saturation.Matching of above four favorable factors leads to the tight sandstone gas reservoir with high abundance,high gas saturation and high gas production in Kuqa Foreland Basin,which is very different from other basins.Under the condition of little difference in physical property of tight sandstone reservoir,excessive source-reservoir pressure difference,facture development,preservation condition and current formation overpressure are the most significant factors to be considered in exploration and evaluation of deep tight sandstone gas. | Xuesong Lu Mengjun Zhao Keyu Liu Qingong Zhuo Junjia Fan Zhichao Yu Yanjie Gong | 2018 | Petroleum Research2018，3，4： | 4 |
| 19 | Pool-Forming Stages and Enrichment Models of Medium- to High-Rank Coalbed Methane显示文摘coalbed 甲烷的形成水池的机制有它的自己的特征。在这份报纸,基于在中国的典型的忍受煤的盆上的研究,这被指出媒介的水库形成 -- 到高等级的 coalbed,甲烷经历了三个批评阶段:coalbed 甲烷产生和吸附阶段和保藏舞台。地区性的构造进化,水动力学条件和封上的条件在 coalbed 甲烷解吸附作用散开和保藏的阶段起重要作用。中等 -- 到高等级的 coalbed,甲烷有丰富模型的三种类型,也就是说最有利,相对有利,并且相反的丰富模型。 | SONG Yan ZHAO Mengjun HONG Feng LIU Shaobo QIN Shengfei WANG Hongyan | 2010 | Acta Geologica Sinica(English Edition)2010，84，6： | 4 |
| 20 | Privacy-preserving Distributed Location Proof Generating System显示文摘The rapid development of location-based service(LBS) drives one special kind of LBS, in which the service provider verifies user location before providing services. In distributed location proof generating schemes, preventing users from colluding with each other to create fake location proofs and protecting user's location privacy at the same time, are the main technical challenges to bring this kind of LBS into practical. Existing solutions tackle these challenges with low collusion-detecting efficiency and defected collusion-detecting method. We proposed two novel location proof generating schemes, which inversely utilized a secure secret-sharing scheme and a pseudonym scheme to settle these shortcomings. Our proposed solution resists and detects user collusion attacks in a more efficient and correct way. Meanwhile, we achieve a higher level of location privacy than that of previous work. The correctness and efficiency of our proposed solution is testified by intensive security analysis, performance analysis, as well as experiments and simulation results. | LIU Mengjun LIU Shubo ZHANG Rui Li Yongkai WANG Jun CAO Hui | 2016 | China Communications2016，13，3： | 3 |
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