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Controls on reservoir quality in the paleogene Kalatar Formation of the southwestern region of the Tarim Basin,china

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Petroleum Science 2011年第3期8卷 302-315页

作者： Yang Haijun Shen Jian-Wei Wang xu Zhang Lijuan Li Meng Key Laboratory of Marginal Sea Geology of CAS South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Exploration and Development Research institute Tarim Oilfield Company Petroleum Company Limited Korla 841000 China Graduate School of the chinese academy of sciences Beijing 100049 China

The Paleogene Kalatar Formation is a main target for petroleum ex125 ploration in the southwestern region of the Tarim Basin （SWRTB） and a systematical summary of controls on reservoirs of high quality has important implications for this area. According to outcrop analysis, as well as core, and laboratory experiments based on theories of sedimentology, it can be inferred that the main pore types in the Kalatar Formation are moldic, vuggy, intercrystalline and interparticle pores, fractures, and mudstone microporosity, respectively. The foreshore in the shore-shelf depositional model is the most favorable target, wherein grainstone and dolomitized grainstone are characterized by high quality in a middle ramp subfacies of the carbonate ramp model. Diagenetic factors, such as micritization, cementation, compaction, neomorphism, silicification, and pyritization, are detrimental for reservoirs. At the same time, leaching and dolomitization can improve the quality of reservoirs. Permeability of reservoirs can be greatly improved by fractures, through which quality of reservoirs can be effectively enhanced. Concentration of CO2, temperature, and humidity are affected by changes in climate, which can have an influence on depositional setting, composition and diagenesis of sediments, and eventually the properties of reservoirs. The hot and arid climate of the Paleogene was harmful to development of reservoirs, which is demonstrated in the contemporaneous diagenetic and epigenetic stages. Shallow and deep-burial diagenesis are closely related to the formation and the connate water, however these are rarely affected by paleo-climatic variation. There is possible erosion that mainly resulted from organic acid in relative well intervals according to indications of hydrocarbons in the early diagenetic stage. Fracture systems can be established when acidic fluids are ernplaced during periods of uplift, by which pores can be effectively enlarged during the late diagenetic stages.

关键词： Kalatar Formation sedimentary facies diagenesis dolomitization fractures climaticconditions Tarirn Basin

Volatiles in the mantle transition zone and their effects on big mantle wedge systems

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National Science Review 2024年第06期11卷 15-18页

作者： Yu Wang Yi-Gang xu State Key Laboratory of Isotope geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Southern Marine Science and Engineering Guangdong Laboratory (guangzhou)

The mantle transition zone (MTZ), located between the upper and lower mantle, is characterized by sudden seismicvelocity discontinuities at depths of 410 and 660 km where significant change in mineralogical composition occurs. As a link between the upper and lower mantle,the MTZ is a layer of special significance in Earth’s deep structure, and a critical interface in geodynamics and material circulation.

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Bulk chemical composition of lherzolitic shergottite Grove Mountains 99027—Constraints on the mantle of Mars

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Bulk chemical composition of lherzolitic shergottite Grove M...

Deep learning approaches to recover the plasma current density profile from the safety factor based on Grad–Shafranov solutions across multiple tokamaks

中国科学院地质与地球物理研究所2008学术年会

作者： Yangtmg LIN~(1*),Liang QI~2,Guiqm WANG~3,and Lin xu~4 1 Key Laboratory of the Earth’s Deep Interior,institute of Geology and Geophysics,chinese academy of sciences,Beijing 100029,china 2 State Key Lab of Ore Deposit geochemistry,institute of geochemistry,chinese academy of sciences,Guiyang 550002,china 3 guangzhou institute of geochemistry,chinese academy of sciences,guangzhou,china 4 National Astronomic Observatory,chinese academy of sciences,Beijing,china

We report the concentration of 50 elements,including rare earth elements(REEs) and platinum group elements(PGEs) in bulk samples of the Grove Mountains(GRV) 99027 lherzolitic *** abundances of REEs are distinctly lower than those of Allan Hills(ALH) A77005 and other lherzolitic shergottites,indicating that GRV 99027 is not paired with *** may,nevertheless, sample the same igneous unit as the others(Lin et al.2005b;Wang and Chen 2006).The CI-normalized elemental pattern of GRV 99027 reveals low(0.004-0.008×CI) and unfractionated PGEs (except for Pd of 0.018×CI) without depletion of W or Ga relative to lithophile element trends. Fractionation between siderophile and lithophile elements become less pronounced with increase of volatility,except for high abundances of Ni and *** characteristics are probably representative of the mantle of Mars,which is consistent with previous work that the Martian mantle formed in a deep magma ocean followed by a later accretion of chondritic materials.

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Plasma Science and Technology 2024年第5期26卷 17-28页

作者：张瀚予周利娜刘钺强郝广周王硕杨旭苗雨田段萍陈龙 College of Science Dalian Maritime UniversityDalian 116026People’s Republic of China General Atomics San Diego 92186-5608United States of America Southwestern institute of Physics Chengdu 610041People’s Republic of China Chongqing Key Laboratory of Intelligent Perception and BlockChain Technology Chongqing Technology and Business UniversityChongqing 400067People’s Republic of China

Many magnetohydrodynamic stability analyses require generation of a set of equilibria with a fixed safety factor q-profile while varying other plasma parameters.A neural network(NN)-based approach is investigated that facilitates such a *** multilayer perceptron(MLP)-based NN and convolutional neural network(CNN)models are trained to map the q-profile to the plasma current density J-profile,and vice versa,while satisfying the Grad–Shafranov radial force balance *** the initial target models are trained,using a database of semianalytically constructed numerical equilibria,an initial CNN with one convolutional layer is found to perform better than an initial MLP *** particular,a trained initial CNN model can also predict the q-or J-profile for experimental tokamak *** performance of both initial target models is further improved by fine-tuning the training database,*** adding realistic experimental equilibria with Gaussian *** fine-tuned target models,referred to as fine-tuned MLP and fine-tuned CNN,well reproduce the target q-or J-profile across multiple tokamak *** an important application,these NN-based equilibrium profile convertors can be utilized to provide a good initial guess for iterative equilibrium solvers,where the desired input quantity is the safety factor instead of the plasma current density.

关键词： plasma equilibrium deep learning safety factor profile current density profile tokamak

geochemistry of late Mesozoic-Cenozoic basalts in Yitong-Datun area, NE china and its geodynamic implication

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Geochemistry of late Mesozoic-Cenozoic basalts in Yitong-Dat...

Heat flow pattern,base of methane hydrates stability zones and BSRs in Shenhu Area,northern South china Sea

International Conference on Continental Volcanism

作者： Hui-Huang Zhang Yi-Gang xu Wen-Chun Ge and Jin-Long Ma Key Laboratory of Isotope Geochronology and geochemistry guangzhou institute of geochemistry chinese academy of sciences 51064. guangzhou china Graduate University of chinese academy of sciences 100049 Beijing china Department of Earth and Planetary sciences Jilin University 130061 Changchun china

＜正＞Yitong-Datun region, where volcanic activity persisted for over 80 Ma, provides important constraints on the evolution of deep lithosphere beneath this part of Northeast china. From late Cretaceous （92.5 Ma） Datun basalt in Changchun to Tertiary （31Ma, 9-15Ma） basalts in Yitong-Shulan graben, alkaline contents and Dy/Yb ratios increase with

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Acta Oceanologica Sinica 2011年第1期30卷 59-67页

作者： ZHANG Yi HE Lijuan WANG Jiyang xu Xing SHA Zhibing GONG Yuehua WANG Hongbing LIANG Jinqiang institute of Geology and Geophysics Chinese Academy of Science Beijing 100029 China Graduate University of the chinese academy of sciences Beijing 100049 China guangzhou Marine Geological Survey Guangzhou Guangdong 510760 China

Using the collected 433 heat flow values, we estimated the bases of methane hydrate stability zone （BHSZ）, in northern South china Sea （NSCS）. Through comparing BHSZs with the depths of bottom simulating reflectors （BSRs）, in Shenhu Area （SA）, we found that there are big differences between them. In the north of SA, where the water depth is shallow, many slumps developed and the sedimentation rate is high, it appears great negative difference （as large as -192%）. However, to the southeast of SA, where the water depth is deeper, sedimentation rate is relatively low and uplift basement topography exists, it changes to positive difference （as large as ＋45%）. The differences change so great, which haven＇t been observed in other places of the world. After considering the errors from the process of heat flow measurement, the BSR depth, the relationship of thermal conductivity with the sediments depth, and the fluid flow activities, we conclude that the difference should be not caused by these errors. Such big disagreement may be due to the misunderstanding of BSR. The deviant ＂BSRs＂ could represent the paleo-BSRs or just gas-bearing sediment layers, such as unconformities or the specific strata where have different permeability, which are not hydraterelated BSRs.

关键词： methane hydrate BSR base of methane hydrate stability zone slump heat flow

New geology, petrography and SHRIMP zircon U-Pb isotopic geochronology of the metabasites along the Changjiang-Qionghai fault zone in Hainan Island, South china: implications for the Paleozoic tectonic event

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New geology, petrography and SHRIMP zircon U-Pb isotopic geo...

Fast source mask co-optimization method for high-NA EUV lithography

International Conference on Continental Volcanism

作者： xu Deru Xia Bin Li Pengchun Chen Guanghao Zhang Yuquan Ma Ci Key Lab of Marginal Sea Geology guangzhou institute of geochemistry chinese academy of sciences guangzhou 51064. china Graduate College of chinese academy of sciences Beijing 100049 china

＜正＞New geological and petrographical investigation, and SHRIMP zircon U-Pb dating assisted by Cathodoluminescence （CL） images all prove that the metabasites along the Changjiang-Qionghai fault zone in Hainan Island, South china were not the same products due to the same tectonic setting. The Chunxin metabasites in Tunchang area, southeast Hainan Island have a protolith age most likely （?） 514 Ma, followed subsequently by a ～440-

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Opto-Electronic Advances 2024年第4期7卷 44-54页

作者： Ziqi Li Lisong Dong xu Ma Yayi Wei EDA Center Institute of Microelectronics of Chinese Academy of SciencesBeijing 100029China Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of china School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China University of chinese academy of sciences Beijing 100049China Guangdong Greater Bay Area Applied Research institute of Integrated Circuit and Systems Guangzhou 510700China

Extreme ultraviolet(EUV)lithography with high numerical aperture(NA)is a future technology to manufacture the integrated circuit in sub-nanometer ***,source mask co-optimization(SMO)is an extensively used approach for advanced lithography process beyond 28 nm technology *** work proposes a novel SMO method to improve the image fidelity of high-NA EUV lithography system.A fast high-NA EUV lithography imaging model is established first,which includes the effects of mask three-dimensional structure and anamorphic ***,this paper develops an efficient SMO method that combines the gradient-based mask optimization algorithm and the compressivesensing-based source optimization algorithm.A mask rule check(MRC)process is further proposed to simplify the optimized mask *** illustrate that the proposed SMO method can significantly reduce the lithography patterning error,and maintain high computational efficiency.

关键词： computational lithography high-NA EUV lithography source-mask co-optimization lithography imaging model

The Formation of Yanshanian Granitic Magma in Dabie Mountains:Dehydration or Aquifer Melting-with Tiantangzhai and Jiuzihe Granites as Examples

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Continental Dynamics 2001年第2期6卷 39-47页

作者： WANG Qiang, ZHAO Zhenhua, QIU Jiaxiang, WANG Renjing, xu Jifeng guangzhou institute of geochemistry, chinese academy of sciences, guangzhou P.R.C 51064. china University of Geosciences, Wuhan, P.R.C 430074 guangzhou institute of geochemistry Chinese Academy of Sciences Guangzhou P.R.C 510640 china University of Geosciences Wuhan P.R.C 430074

There are large-areas of late Yanshanian granites in the Dabie Orogen, but the formation mode of the relevant granitic magma is still under discussion. Taking the typical Yanshanian granites in the North Dabie Block - The TG and JG as examples, the Writers endeavor to discuss contain aspects of the formation mode of the granitic magma by studying the characteristics of the chemical compositions of biotite and amphibole of the granites and petrological features of enclaves in the intrusions, in the light of recent results of experimental petrology on dehydration melting and aquifer melting. It is suggested that: (1) Some biotites in the Tiantangzhai and the JGs and their enclaves were residual minerals; (2) Some of the amphiboles could be new-born minerals, and others, residual ones. (3) the banded bodies in granites were residuals of anatexis. (4) The TG and JG were formed by aquifer melting, and the South Dabie Block could be the important source region of water.

关键词： petrogenesis of granite dehydration melting aquifer melting enclaves characteristics aquifer fluid the Dabie Orogen