日本石油储备的现状、措施及启示

日本是世界第3大石油消费国,而且石油对外依存度高达99％以上,作为确保石油供应安全的重要一环,自20世纪60年代初开始,日本逐步建立起了官民并举的石油储备制度。2006年石油、LPG的储备规模分别为172天和78天。本文首先从基地布局和储备数量两个方面介绍了日本石油及LPG储备的现状,在此基础上,从立法、管理体制和政府扶持3个角度阐述了日本建立石油储备的政策措施,最后在借鉴的基础上提出了完善我国石油储备体系建设的政策建议。     

Adjustment or renewal in regional clusters? A study of diversification amongst SMEs in the Aberdeen oil complex

A renewed interest in the spatial clustering or agglomeration of economic activity is evident within economic geography and related fields. This paper considers processes of change within 'mature' regional clusters, developing a conceptual framework which links firm-level strategies to development scenarios at the cluster level through a set of intervening mechanisms. Whange, enabling the cluster to sustain its prosperity, and adjustment which is associated with stagnation and gradual decline. This conceptual framework is applied to an analysis of one key mechanism of change, diversification, as pursued by small and medium-sized enterprises (SMEs) in the Aberdeen oil cluster. Our analysis indicates that some diversification is occurring, with the implications for the cluster lying midway between adjustment and renewal. In conclusion, we emphasize the need to assess and 'unpack' the clusters concept and suggest that research should focus on the relationships between proximity, learning and evolution.     

Zones of Exclusion: Offshore Extraction, the Contestation of Space and Physical Displacement in the Nigerian Delta and the Mexican Gulf

Abstract:  This article examines two aid interventions that manifest the merging of community development/relief and industrial security policy in the petroleum offshore of the Nigerian Niger Delta and the Mexican Gulf. In the Nigerian case, the article considers the crisis in the Warri region of Delta State in 2003, the subsequent evacuation of local residents, and the surrounding context of oil-related violence. Simmering since the 1990s, the 2003 Warri conflict displaced thousands due to competing community claims to territory that "hosts" oil installations, Shell and Chevron primarily. In Mexico, the analysis centers on the implementation of 2003 Mexican security legislation, prompted by International Maritime Organization post 9/11 security policy, that amplifies the "Zone of Exclusion" around offshore installations. To offset the loss of livelihoods resulting from the "exclusion zone", Mexican state agencies offered financing to support the conversion of the displaced small-scale fishers to fish farming. The varying forms of displacement prompted by these two "liberating" interventions reflect the socio-historical specificity of territorial relations in the Nigerian and Mexican extractive regimes. These relations constitute divergent extractive settings which have come to play contrasting roles in the global political economy of oil, one highly volatile, the other relatively stable.     

Non-destructive chemical characterization of ceramic sherds from Shipwreck 31CR314 and Brunswick Town, North Carolina

The purpose of this study was to chemically and texturally characterize ceramic oil jar sherds from North Carolina Shipwreck 31CR314 and to explore the utility of environmental scanning electron microscopy/X-ray energy dispersive spectrometry (SEM/EDS) for that purpose. The oil jar sherds, widely dispersed about Shipwreck 31CR314, are morphologically similar to each other, which suggests they could be from a single jar, but with so few joins this could not be concluded with certainty. Therefore, an aim of this study was to investigate whether chemical or textural characterization of the sherds might reveal unique attributes that could distinguish individual jars; results of characterization perhaps could give information on their origin and possibly site formation processes, such as whether environmental forces could have scattered sherds of a single jar during and after sinking of the ship. Previous studies have indicated this shipwreck is likely the remnants of the Queen Anne's Revenge, flagship of the pirate Blackbeard. Sherds from this shipwreck were compared with similar oil jar sherds excavated from a land site, Brunswick Town, North Carolina, to explore the use of composition and texture as hallmarks. The chemical components of the artifacts were determined by SEM/EDS. This method of analysis is valuable for archaeological research because it is rapid and non-destructive to the ceramic artifacts. Both groups of lead-glazed coarse red earthenware sherds were texturally similar except for the glazed sides of all 31CR314 sherds that exhibited small tracks of unique crescent-shaped marks. These marks may be due to manufacturing effects and immersion in seawater, and the marks may serve as hallmarks for individual jars or potentially individual manufacturers. The sherds were generally similar in composition, but the two groups exhibited distinct differences. Brunswick Town sherds consistently contained more phosphate on unglazed sides, an average 1.46 wt.% P₂O₅, and also contained trace elements not detected in the Shipwreck 31CR314 sherds. These distinct differences could be due to different manufacturing origins for Shipwreck 31CR314 and Brunswick Town ceramics but also could reflect their subjection to different environments during use and loss prior to archaeological recovery.     

Human impacts on ancient shellfish: a 10,000 year record from San Miguel Island,California

We use measurements of more than 11,000 marine shells from 41 archaeological components to construct a 10,000 year record of human impacts on ancient mussel and abalone stocks on San Miguel Island, California. General reductions in the mean size of mussel and abalone shells gathered through time are attributed to growing human population and predation pressure. Based on comparison with historically documented changes in shellfish communities caused by the local extinction of sea otters in the 19th century, changes in mean shell size and the abundance of other shellfish species may have been facilitated by Native American predation on sea otters as early as 7500 years ago. Despite having measurable impacts on local ecosystems, Native Americans on San Miguel harvested huge quantities of shellfish throughout the Holocene. Such long-term harvests appear to have been sustained by an early emphasis on fishing at lower trophic levels, by periodically shifting village locations, and by intensifying the use of finfish and sea mammals through time. This pattern of “fishing up the food web” contrasts with many modern fisheries, suggesting that the study of ancient fisheries can help us better manage our own endangered coastal ecosystems.     

明清时期河南省部分经济作物的种植与分布

明清时期河南省油料作物主要有花生和芝麻两种,花生明中期传入中国,清代在河南广泛种植。芝麻汉代从西域传入,明清时期在河南广为分布。这两者今日在河南省的经济作物种植中仍占重要地位。染料作物中蓝草和红花均为传统作物,种植历史悠久,分布广泛。从明至清,种植之风方兴未艾。两者在清末均由于受到外来染料的冲击而中落,此后再也未能恢复到原来的水平。嗜食作物中的罂粟,清咸丰年间开始在河南省广泛栽种,后因国人的抗议,在民国年间禁种。烟草和茶叶的种植不惟明清时期就有一定的规模,且一直持续发展,为今日河南省以许昌为中心的烤烟基地和以信阳为中心的茶叶基地的建设和发展创造了条件、奠定了基础。     

三种植物精油对博物馆空气霉菌的抑菌活性研究

从广西民族博物馆易滋生霉菌的展柜里分离、纯化及鉴定了三株霉菌,并研究香叶精油、罗勒精油和山苍子精油对霉菌的抑菌效果,测试这些植物精油喷洒于纸张表面后纸样的防霉性及鉴定三种精油的主要抑菌活性成分。实验结果显示,三种供试植物精油对霉菌均具有显著的抑菌效果,在纸张上的防霉效果也很明显,其综合抑菌效果大小为:香叶精油罗勒精油山苍子精油。GC-MS分析表明,香叶精油的主要活性成分为:香叶醇(56.73%)、橙花醇(38.31%)。罗勒精油的主要活性成分为:丁香酚(83.14%),己二醇(16.15%)。山苍子精油的主要活性成分为:柠檬醛(36.01%),(Z)-3,7-二甲基-2,6-辛二烯醛(29.71%)和柠檬烯(16.67%)。植物精油作为博物馆展存环境的空气防霉剂具有良好的应用前景。     

The Social and Economic Complexity of Ancient Jerusalem as Seen Through Choices in Lighting Oils

This paper presents and discusses the results of residue analysis conducted on 78 ceramic lamps found in archaeological excavations in ancient Jerusalem, in an attempt to identify the types of oils used and the reasons for their preferential choice. The oil lamps chosen for the study were taken from a variety of contexts, which represent the different periods during which Jerusalem was settled and the different sectors of the city. The results of the study show that even the most mundane activity of lighting using oil held within it social and economic choices, as mirrored in the different excavation areas.     

Application of boron isotopes to the understanding of fluid–rock interactions in a hydrothermally stimulated oil reservoir in the Alberta Basin, Canada

Boron isotope ratios of reservoir minerals and fluids can be a useful geothermometer and monitor of fluid–rock interactions. In Cold Lake oil sands of northern Alberta, there is a large variation in δ¹¹B of the produced waters generated during steam injection and recovery of oil and water. The higher temperature waters (～ 200 °C) have isotopically light δ¹¹B values (+ 3‰ to + 14‰) and high B contents (～150 p.p.m.). It is inferred that the range of δ¹¹B values of the hydrothermal fluids results from reaction with the reservoir rock, and is a function of the temperature of the fluid–rock interaction. The distinct B geochemistry of the produced waters can be used to show that there is no detectable mixing of the oil recovery waters with the regional formation waters or shallow groundwater aquifers containing potable water. Examination of B isotope ratios of reservoir minerals, before and after steam injection, allows the evaluation of sources of B in the reservoir. The only significant phase containing B is pumice. It shows generally positive δ¹¹B values before steam injection and negative values after steam, with δ¹¹B as low as ? 28‰. Other possibly reactive phases include clay minerals and organic matter, but their abundance is not great enough to impact on the isotopic composition of the produced waters. This information makes it possible to evaluate the boron isotope fractionation equation derived from experimental data ( Williams LB (2000) Boron isotope geochemistry during burial diagenesis. PhD Dissertation. The University of Calgary, Alberta, Canada; Williams LB, Hervig RL, Holloway JR, Hutcheon I (2001a) Boron isotope geochemistry during diagenesis: Part 1. Experimental determination of fractionation during illitization of smectite. Geochimica et Cosmochimica Acta, in press). The results show that the fractionation curve predicts the difference between δ¹¹B of the pumice and hydrothermal fluids in the Cold Lake reservoir. This not only indicates that the reservoir fluids have approached boron isotope equilibrium with the reservoir rock, but also shows that B isotopes provide a useful geothermometer for hydrothermally stimulated oil reservoirs.     

A New Energy Age in Pacific Russia: Lessons from the Sakhalin Oil and Gas Projects

A noted British specialist in Russia's economic geography and the Far East region presents a comprehensive account of the development of the onshore and offshore oil and gas deposits of Sakhalin. Following a review of early multinational activity in geological surveying and exploration during the 1970s, he charts subsequent changes in the entities formed to develop and exploit the deposits (Sakhalin-I and -II) later in the Soviet period and during the first two decades of Russian independence. These changes have responded to improved knowledge of the geology of the deposits and changing relations between the Russian central government and Sakhalin regional authorities. Also analyzed are efforts by the Russian side to overturn or otherwise modify terms of previous agreements deemed unfavorable, and maneuvering by China and Japan to secure increasing sources of supply for their markets. With Sakhalin's two core projects now entering the active production phase, the author distills a number of key issues that have shaped the development of the island's offshore hydrocarbon resources and will have a bearing on prospects for a future generation of less spectacular new projects (incremental development); he also outlines wider lessons that have been learned over the life of Sakhalin's projects. Journal of Economic Literature, Classification Numbers: F210, L710, L950, P330, Q400. 4 figures, 2 tables, 45 references.