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Diagenesis and its controls on reservoir quality of the Tambar oil field, Norwegian North Sea

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Energy Geoscience 2021年第1期2卷 10-31页

作者： Mohammed Bukar Richard H.Worden Shettima Bukar philip Shell Department of Earth and Ocean Sciences University of LiverpoolLiverpoolL693GPUK Department of Geology University of MaiduguriNigeria Saudi Aramco Al-DhahranEastern RegionSaudi Arabia

A study of the diagenetic evolution of the Late Jurassic sandstones of the shallow marine facies in the Tambar oil field,Norwegian North Sea was carried out to understand its controls on reservoir *** samples and a set of wireline logs obtained from three wells were used to carry out petrographic studies including light optics and scanning electron microscopy,well log analysis,fluid inclusions,X-ray diffraction(XRD)for whole rock samples,clay mineral extracts and stable *** Tambar reservoir sandstones range mainly from siltstone to fine-grained sandstones,exclusively arkoses cemented mainly by microcrystalline quartz,euhedral quartz overgrowth,dolomite cement,illite and *** diagenetic/eodigenetic minerals include pyrite,calcite,and microcrystalline quartz and late diagenetic/mesodiagenetic minerals include quartz overgrowth,dolomite,illite and *** d18O values of dolomite cement in the Tambar sandstone reservoir range from11.77‰to3.57‰PDB,while the d13C values of the dolomite cement are from5.07‰to1.12‰*** temperature for fluid inclusions trapped in authigenic quartz fall between 130℃ and 169℃.The reservoir quality is controlled mainly by early formed grain-coating microcrystalline quartz that precipitated from the dissolution of sponge spicules which significantly inhibits quartz overgrowth *** emplacement do not show significant control on reservoir quality because considerable quartz cementation has taken place before the onset of major oil *** the coarse-grained sands show a correlation between quartz cement volume and water ***,the interpreted temperature for dolomite cementation is significantly higher for water leg-suggested effect of oil emplacement on the late ***-standing these controls on the reservoir quality will enhance the exploration strategy for the Tambar oil field.

关键词： Diagenesis Oil-inhibition Microquartz-inhibition Anomalous porosity Permeability

A putative plant organelle RNA recognition protein gene is essential for maize kernel development

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Journal of Integrative Plant Biology 2015年第3期57卷 236-246页

作者： Antony M.Chettoor Gibum Yi Elisa Gomez Gregorio Hueros Robert B.Meeley philip W.Becraft Department of Genetics Development and Cell BiologyIowa State University Carnegie Institution of Science Plant Genomics and Breeding Institute Seoul National University Department of Biotechnology and Biomedicine University of AlcalaUniversity Campus Du Pont Pioneer Department of Agronomy Iowa State University

Basal endosperm transfer layer（BETL） cells are responsible for transferring apoplastic solutes from the maternal pedicel into the endosperm,supplying the grain with compounds required for embryo development and storage reserve ***,we analyze the maize（Zea mays L.） empty pericarp6（emp6） mutant,which causes early arrest in grain *** Emp6 tgene function is required independently in both the embryo and *** emp6 mutant causes a notable effect on the differentiation of BETL cells;the extensive cell wall ingrowths that distinguish BETL cells are diminished and BETL marker gene expression is compromised in mutant *** tagging identified the emp6 locus as encoding a putative plant organelle RNA recognition（PORR） protein,1 of 15 PORR family members in *** emp6 transcript is widely detected in plant tissues with highest Researclevels in embryos and developing ***6-green fluorescent protein（GFP） fusion proteins transiently expressed in Nicotiana benthamiana leaves were targeted specifically to *** results suggest that BETL cell differentiation might be particularly energy intensive,or alternatively,that mitochondria might confer a developmental function.

关键词： Empty pericarp endosperm mitochondria RNA processing transfer cell

Quantitative estimation of sediment erosion and accretion processes in a micro-tidal coast

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International Journal of Sediment Research 2014年第2期29卷 218-231页

作者： G.Udhaba DORA V.Sanil KUMAR P.VINAYARAJ C.S.philip G.JOHNSON CSIR-National Institute of Oceanography GoaIndia.Senior Research Fellow.Mr. CSIR-National Institute of Oceanography GoaIndia.Senior Principal Scientist.Dr. CSIR-National Institute of Oceanography GoaIndia.Project Assistant.Mr.

Spatio-temporal cross-shore profiles and textural characteristics are the key parameters for understanding dynamics of the inter-tidal sedimentary *** study describes short-term dynamics of the inter-tidal sedimentary environment at beaches along the micro-tidal *** a correlation is estimated in cross-shore morphodynamics and textural characteristics of surface *** sedimentary environment is examined for a complete annual cycle using monthly collected cross-shore profiles and sediment *** Devbag beach(northern side) and Ravindranath Tagore beach(southern side) at the Kali river mouth,Karwar,west coast of India are characterized from extremely gentle to average slope,and broadly composed of unimodal *** sedimentary environment is significantly composed of textures having fine to medium sand,well to moderately sorted,fine to coarse skewed,and platykurtic to leptokurtic in *** the annual cycle a reversal pattern is observed between the two adjacent beaches,where a slower rate of sediment accretion is observed at Devbag beach while Ravindranath Tagore beach exhibited *** beach dynamics along with the propagation of south-west(SW) and south-west-west(SWW) waves towards the coast significantly exhibit a dominance of northward sediment transport with the existence of a northerly alongshore *** addition,the study reveals that an eroded beach may not be significantly identified composed of coarse *** poor correlation in morpho-sedimentary characteristics reveals the prediction of grain characteristics based on beach profile and vice-versa is unrealistic.

关键词： Cross shore profile Beach volume grain size distribution Textural characteristics wave Kali estuary

Improving tribological and thermal properties of Al alloy using CNTs and Nb nanopowder via SPS for power transmission conductor

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Transactions of Nonferrous Metals Society of China 2020年第2期30卷 333-343页

作者： Chika O.UJAH Patricia POPOOLA Olawale POPOOLA Victor AIGBODION philip OLADIJO Department of Chemical Metallurgical and Materials EngineeringTshwane University of TechnologyPretoria 0001South Africa Department of Electrical Engineering Tshwane University of TechnologyPretoria 0001South Africa Department of Metallurgical and Materials Engineering University of NigeriaNsukka 410001Nigeria Department of Chemical Materials and Metallurgical EngineeringBotswana International University of Science and TechnologyPalapye 12345Botswana Department of Mechanical Engineering University of JohannesburgJohannesburg 2000South Africa

This study aimed at improving the tribological and thermal properties of Al alloy using CNTs and Nb nanopowder as reinforcements and spark plasma sintering(SPS)as the fabrication *** SPS was conducted at 630℃,30 MPa,10 min,and 200℃/*** tribology test was run with ball-on-disc tribometer using steel ball as the counter *** the thermal test was processed with thermogravimetric analyzer(TGA)and laser flash apparatus(LFA).Results showed that the addition of 8 wt.%CNTs and 8 wt.%Nb reinforcements respectively decreased the coefficient of friction(COF)of the composite by 79%.The wear volume of the composite was decreased by 23%,and so was the wear ***,the thermal conductivity of the composite was equally improved by 44%.The tribology improvement was stimulated by a C film generated by CNTs and a protective Nb2O5 formed by Nb *** thermal conductivity was improved by the grain refining property of Nb and the high thermal conductivity of ***,these results indicated that Al-CNTs-Nb composite is a robust material for high transmission conductor capable of reducing sag and ensuring the durability of the composite.

关键词： tribology thermal conductivity spark plasma sintering Al-CNTs-Nb composite coefficient of friction

Textural characteristics of foreshore sediments along Karnataka shoreline,west coast of India

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International Journal of Sediment Research 2011年第3期26卷 364-375页

作者： G.Udhaba DORA V.Sanil KUMAR C.Sajiv philip Glejin JOHNSON P.VINAYARAJ R.GOWTHAMAN Ocean Engineering Division National Institute of Oceanography(Council of Scientific & Industrial Research)Dona PaulaGoa-403 004India

grain character analysis of beach sediments along three selected beaches(Pavinkurve,Kundapura and Padukare)of Karnataka coast,west coast of India is carried out in the present *** objective was to identify the textural behavior of beach sediments during an annual cycle from March 2008 to February *** characteristics such as central tendency,sorting,kurtosis and skewness were estimated using GRADISTAT and *** maximum(62%)sediment samples were medium sand with unimodal and bimodal characters at all the three *** median values varied in between-0.04φand 2.74φwith an average value of 1.61φ.The beaches were characterized as well sorted,moderately well sorted and moderately sorted sediment *** were identified as fine skewed to coarse skewed with platykurtic,mesokurtic and leptokurtic characters. grain characteristics varied spatially and temporally along with beach orientation,foreshore slope and wave action.A negative correlation between mean and sorting is identified for maximum number samples along the study region but not very *** study shows that the sedimentary environment at Kundapura were influenced by relatively high wave action compared to Padukare and Pavinkurve beach and the beaches were under erosion or non-deposition with strong winnowing process.

关键词： Cumulative percentage distribution Central tendency Sorting Skewness Kurtosis

Analysis of phototactic responses in Spodoptera frugiperda using Helicoverpa armigera as control

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Journal of Integrative Agriculture 2021年第3期20卷 821-828页

作者： LIU Ying-jie ZHANG Dan-dan YANG Li-yu DONG Yong-hao LIANG Ge-mei philip DONKERSLEY REN Guang-wei XU Peng-jun WU Kong-ming Key Laboratory of Tobacco Pest Monitoring Controlling&Integrated Management Tobacco Research InstituteChinese Academy of Agricultural SciencesQingdao 266101P.R.China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China Lancaster Environment Centre Lancaster UniversityLancasterLA14YQUK

Light traps are widely utilized to monitor and manage insect pest *** late 2018,the fall armyworm(FAW),Spodoptera frugiperda,invaded China through Yunnan Province representing a huge threat to grain *** estimate the efficiency of light traps on FAW moths,we first identified the opsin genes from FAW by using the *** analysis indicated that the four opsins of FAW were clustered with those of other Noctuidae *** expressed levels of opsins in *** were lower than in Helicoverpa armigera,suggesting a different phototactic response between the two ***,we determined the phototactic behavior of FAW using *** as a control,which is widely monitored and managed using light traps in *** results indicated that the two moths species showed significantly different phototactic behavior and both female and male FAW displayed faster flight-to-light speed than *** may be due to a faster flight capacity in FAW compared to ***,the capture rate of both female and male of *** was significantly lower than that of ***,which was consistent with the expression levels of *** results support the positive phototaxis of *** moths and suggest light traps could be used for monitoring and managing the pests,but with a lower efficiency than ***.

关键词： Spodoptera frugiperda Helicoverpa armigera light performance opsin genes light trap

中国农业发展三大模式:行政、放任与合作的利与弊

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开放时代 2017年第1期 128-153页

作者：黄宗智中国人民大学法学院美国加利福尼亚大学洛杉矶校区历史系

本文论证,中国的"旧农业"——谷物生产——今天主要运作于一个行政模式之下,而"新农业"——高值蔬菜、水果、肉-禽-鱼和蛋奶——则主要运作于一个放任的市场模式之下。在国际市场竞争和粮食价格相对低廉的压力下,前者起到保护中国谷物... 详细信息

本文论证,中国的"旧农业"——谷物生产——今天主要运作于一个行政模式之下,而"新农业"——高值蔬菜、水果、肉-禽-鱼和蛋奶——则主要运作于一个放任的市场模式之下。在国际市场竞争和粮食价格相对低廉的压力下,前者起到保护中国谷物生产和"粮食安全"的作用,但也显示倾向过度依赖指令性手段和无视农民意愿的弱点。后者则成功地凭借市场收益激发了小农的创新性,但经常受到市场价格波动的冲击以及商业资本的榨取。作为第三种模式的"专业合作社",则主要试图模仿美国的纯经济性合作社模式,无视中国村庄,不符合中国实际。本文提倡,中国应该模仿"东亚"模式的半政府性综合农协,扎根于村庄社区,由此往上延伸到乡(镇)、县(市)、省、中央各级政府。它们主要为小农提供"纵向一体化"的产品加工和销售服务、技术咨询与服务、信贷服务、组织农资供销、组织社区活动,并参与国家政治来维护小农利益,一如日-韩-台历史经验中,其人均国内总产值以及工农业所占相对比例大致相当于如今中国的那段时期。

关键词：旧农业新农业日-韩-台综合农协马克思主义新自由主义

资本主义农业还是现代小农经济?——中国克服“三农”问题的发展道路

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开放时代 2021年第3期 32-46,6页

作者：黄宗智中国人民大学法学院历史与社会高等研究所

根据对权威性的全国农业普查数据的分析,笔者论证"资本主义农业"和"规模化农业"在农业整体中所占比例其实较小。以雇工数量来估计的话,不会超过务农人员总数的3.3%。改革以来中国所经历的小规模"劳动与资本双密集"的高附加值"新农业"其... 详细信息

根据对权威性的全国农业普查数据的分析,笔者论证"资本主义农业"和"规模化农业"在农业整体中所占比例其实较小。以雇工数量来估计的话,不会超过务农人员总数的3.3%。改革以来中国所经历的小规模"劳动与资本双密集"的高附加值"新农业"其实要重要得多,如今已经达到农业总产值的三分之二和总耕地的三分之一。另一主要变化是2004年之后在粮食种植方面的较快速机械化,主要是由小农户以其非农就业所得来购买的。2004年以来新的基层机耕(播收)服务业的较广泛兴起,如今已经达到粮食种植中的70%。认识到小农和小农户对小农业的现代化已经做出的贡献,才能看到其对促进未来进一步现代化的潜能。国家2018年以来已经给予小农和小农业前所未有的关注,应该对小农社区及其潜在的公益道德价值观也给予适当重视。小农户、小农业、小农村"三小农"其实是过去和未来进一步发展"现代小农经济"的关键资源和主体。

关键词：全国农业普查现代小农经济中央一号文件 “三农”问题 “三小农”现代化的发展道路

3D Integrated Circuit using Large grain Polysilicon Film

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3D Integrated Circuit using Large Grain Polysilicon Film