姬塬地区长2 1油层组沉积相研究

根据大量的岩芯观察及测井曲线分析,认为姬塬地区长21油层组主要为湖泊三角洲前缘亚相。根据沉积层序特征,可将该区三角洲前缘亚相划分为水下分流河道、水下天然堤、水下决口扇、河口砂坝、席状砂以及水下分流间湾等六种沉积微相。其中水下分流河道微相和河口砂坝微相是该区长21的有利储层,水下分流河道砂体和河口坝砂体是该区今后勘探的方向。沉积相分析师研究砂体分布的关键技术,沉积相确定的正确与否直接影响着对砂体分布规律的认识。     

王窑-西河口地区长6油藏沉积相研究

根据大量的岩芯观察及测井曲线分析,研究区长6油层组主要为曲流河三角洲前缘亚相沉积,可将该区三角洲前缘亚相划分为水下分流河道、水下天然堤、水下决口扇、河口砂坝、席状砂以及水下分流间湾等六种沉积微相。其中水下分流河道微相和河口砂坝微相是该区长6的有利储层,水下分流河道砂体和河口坝砂体是该区今后勘探的方向。沉积相分析师研究砂体分布的关键技术,沉积相确定的正确与否直接影响着着对砂体分布规律的认识。     

双河油田Ⅵ油层沉积微相特征

为了弄清双河油田Ⅵ油层的储层发育特征,为该区剩余油的开发提供较为符合实际的储层地质模型,对该区沉积相类型进行了划分,该区主要发育扇三角洲前缘亚相,可细分为水下分流河道、河口砂坝、前缘席状砂、远砂坝、前扇三角洲泥、分流河道间湾共六种沉积微相。研究区可作为储层的砂体主要为水下分流河道砂体、河口坝砂体、前缘席状砂砂体及远砂坝砂体。     

博兴洼陷南斜坡金家地区金八块沙三上亚段沉积微相研究

通过对金家地区岩心、测井资料和录井资料分析认为：研究区内沙三上亚段主要发育三角洲相,可进一步分为三角洲前缘亚相以及水下分流河道、水下天然堤、分流河口坝和水下分流间湾四种微相类型。区内有三块有利砂体,分布于三角洲前缘水下分流河道和河口坝砂体。     

长岭凹陷腰英台地区青山口组沉积特征

在对长岭凹陷腰英台地区区域地质资料、地震数据、测井及岩芯资料分析的基础上,研究了腰英台地区沉积特征。结果表明：腰英台地区青山口组发育三角洲—湖相沉积;三角洲相发育三角洲平原和三角洲前缘。三角洲平原亚相主要发育分流河道和分流间湾微相;三角洲前缘主要发育水下分流河道,水下分流间湾,河口坝,席状砂,远沙坝微相。湖泊相发育滨浅...     

普光气田分水岭-铁山构造须家河组沉积相研究

根据普光地区分水岭-铁山构造已钻井岩电资料,进行单井相、连井沉积相及沉积相平面展布特征研究,研究表明:研究区须家河组沉积位于三角洲平原亚相和三角洲前缘亚相过度带上,发育了分流河道、分流间湾、河漫沼泽、决口扇、水下分流河道、河口坝、前缘席状砂等沉积微相。其中须二、四、六段主要为三角洲前缘沉积,水下分流河道、河口坝是有利储层发育的主要沉积微相。     

青平川油田延长组长6油层沉积微相与油气分布

本文着重利用岩性标志和测井相标志对研究区的沉积相、亚相及微相类型及展布进行研究,认为本区长6油层为一套曲流河三角洲前缘沉积,曲流河三角洲前缘主要发育水下分流河道、水下天然堤、水下决口扇、河口坝、前缘席状砂和分流间湾等微相。其中以水下分流河道、分流间湾和河口坝沉积为主。研究区发育三角洲沉积体系,形成沿北北东方向分布的条带状、块状储集砂体,主要类型有分流河道、水下分流河道、决口扇、河口坝以及席状砂等砂体。长6下部长7油层组在纵向上沉积的旋回性构成了多套生储盖组合。     

双江油田核三段Ⅶ油组沉积微相及其储层研究

沉积微相研究是认识储层各种物性特征的重要基础。以岩心和测井分析资料为基础,通过对Ⅵ、Ⅶ油组的岩石类型及其组合、沉积构造、生物特征及粒度分布特征等沉积相标志的综合研究,确认目的层为一套扇三角洲沉积体。可进一步分为三角洲前缘及前三角洲两个亚相,其内主要发育水下分流河道、水下分流河道间、河口砂坝、远砂坝、席状砂及前三角洲泥微相。研究表明河口砂坝、水下分流河道沉积储层物性较好,远砂坝、席状砂砂体物性相对较好。反映了沉积微相对研究区储层物性特征起着重要作用。     

桥镇地区侏罗系延安组沉积相特征

通过观察描述岩心22口,观察和实测野外露头剖面,并配合钻井资料、测井分析等资料,结合邻区地层、沉积相研究成果,研究认为桥镇地区侏罗系延安组发育河流沉积体系、湖泊沉积体系和三角洲沉积体系,主要发育辫状河、滨浅湖、三角洲前缘等亚相。研究区河道砂坝、三角洲前缘水下分流河道是重要的油气储集体。     

鄂尔多斯盆地张岔地区长6油层组沉积微相研究

根据研究区140余口井的测井、录井及大量分析化验资料,结合各种相标志,利用沉积相综合研究方法系统划分了本区延长组长6油层组的沉积微相类型,分析了沉积微相与油气分布的规律.研究表明:本区长6油层组主要发育三角洲前缘亚相[1],微相主要为水下分流河道、河口坝以及分流间湾等.水下分流河道砂体垂向叠加,厚度较大,为油气富集的主要场所;通过对砂体展布特征的研究,为下一步的勘探开发提供了依据.     

Glass Formation, a Contemporary View

The process of glass formation is discussed from several perspectives. Particular attention is directed to kinetic treatments of glass formation and to the question of how fast a given liquid must be cooled in order to form a glass. Specific consideration is paid to the calculation of critical cooling rates for glass formation, to the effects of nucleating heterogeneities and transients in nucleation on the critical cooling rates, to crystallization on reheating a glass, to the experimental determination of nucleation rates and barriers to crystal nucleation, and to the characteristics of materials which are most conducive to glass formation.     

Phase Relations and Glass Formation in the System PbO-GeO,

Phase relations in the system PbO-GeO₂ were determined using the quenching technique. The five compounds detected were: 4PbO-GeO₂, 3PbO-2GeO₂, PbO-GeO₂, and PbO-4GeO₂. The 3:2 and 1:1 compounds melt congruently at 744° and 799°, respectively. The 4:1 compound melts incongruently at 726°C to PbO plus liquid, whereas the 1:4 compound melts incongruently to GeO₂ plus liquid at 790°C. The 1:2 compound has a temperature range of stability between 707° and 730°. The data indicate that no liquid immiscibility gap exists in the system. Indices of refraction for glasses in the system were compared with lead silicate glasses. An addition of ∼65%PbO to GeO₂ is required to prepare a glass with an index near 2.0 whereas with SiO₂, ∼85% PbO is required. It appears that the lead germanate glasses have higher indices than all other two-component oxide glasses. The addition of PbO to GeO₂ decreases the rutile-to-quartz transformation temperature from 1000°C for pure GeO₂ to 990°C. Infrared spectra of lead germanate glasses (∼60w% PbO) show that transmission is good up to 5.5μ but decreases drastically between 5.5 and 6.5μ.     

Model for the Formation of Silicon Carbide from the Pyrolysis of Dichlorodimethylsilane in Hydrogen: I, Silicon Formation from Chlorosilanes

Silicon tetrachloride is a major product of the pyrolysis of dichlorodimethylsilane in hydrogen. A model is developed for the deposition of silicon from the reduction of silicon tetrachloride with hydrogen in a tubular reactor at temperatures from 700° to 1100°C and 1.013 × 10⁵ Pa (1 atm) pressure. Concentrations of silicon tetrachloride varied from 1 to 9 vol%. Gas chromatography was used to determine the volatile products of reaction, and gravimetric analysis was used to determine the total silicon deposition on the tube. The model, based on the experimental data, assumes the following reversible chemical reactions:
The rate constants derived from a nonlinear regression analysis are reported.     

甲壳素纤维的成形、改性及应用研究进展

介绍了甲壳素纤维目前的国内外发展现状。阐述了甲壳素的纤维成形及改性方法,纤维成形方法有湿法纺丝、发酵法;改性方法有交联法、间接生产法、涂层法及物理共混法。同时简要概括了甲壳素纤维在混纺纱、织物及非织造布的拓展应用。     

北大港东营组和沙河街组物源分析

在前人研究工作的基础上,本文采用相关碎屑岩特征统计分析及运用G azzi-D ick inson三角图解方法对北大港东营组和沙河街组进行了碎屑岩类统计及物源分析研究,统计分析结果表明,研究区有多物源特性,物源来源于陆块物源区与岩浆弧物源区交接部位。自北向南沉积物稳定性与成熟度也有所提高,因此研究区物源也受到北部燕山物源的影响。     

塔木察格盆地塔南凹陷铜钵庙组储层特征及控制因素分析

塔木察格盆地是断陷型盆地,盆地内断裂较发育,断裂及不整合面匀通生油岩和圈闭,作为油气运移优势通道,有利于油气的运聚和成藏.塔南凹陷位于海拉尔一塔木察格盆地中部断陷带的南部,塔南凹陷铜钵庙组是油气勘探的主要目的层之一,现已有55口井获得工业油流,层内砂体较发育,储层较厚.本文通过岩心分析、铸休薄片分析、电镜扫描等方法,分别对储层的岩石学特征、孔隙类型、物性特征进行了研究,并分别从沉积、成岩作用、构造作用等几个方面研究了影响储层物性的控制因素.研究成果表明,塔南凹陷铜钵庙组储层主要由碎屑岩组成,其次为火山碎屑岩.通过对铜钵庙组59口井压汞资料的分析研究,将喉道类型分为较细喉-中孔道、较细喉-小孔道、较细喉-特小孔道,细喉-特小孔道、徽细喉-特小孔道5种类型,储集空间主要为次生孔隙,其次为原生孔隙,铜钵庙组储层孔隙结构总体较差,属中低孔隙度、特低渗透率储层.储层物性的控制因素主要为沉积环境和成岩作用和构造作用.扇三角洲内前缘储层物性最好,导致储层物性变差的因素主要为压实作用和胶结作用,溶蚀作用使储层物性变好.     

Enzymatic Formation of Rufoschweinitzin,a Binaphthalene from the Basidiomycete Cortinarius rufoolivaceus

Dimeric polyketides are widespread fungal secondary metabolites. They occur in both ascomycetes and basidiomycetes and, therefore, across fungal phyla. Here we report the isolation of a new binaphthalene, named rufoschweinitzin, from the basidiomycete Cortinarius rufoolivaceus. Rufoschweinitzin consists of two symmetrically 4,4′-coupled torachrysone-8-O-methyl ether moieties. Furthermore, we have identified a binaphthalene biosynthetic gene cluster in an unrelated fungus, the ascomycete Xylaria schweinitzii. Heterologous expression of the encoded cytochrome P450 enzyme verified its coupling activity: dimerization of torachrysone-8-O-methyl ether led to the formation of rufoschweinitzin alongside a hitherto unknown regioisomer, now named alloschweinitzin. We have thus demonstrated enzymatic formation of the basidiomycete's metabolite rufoschweinitzin and made the regiochemistry of alloschweinitzin accessible with an ascomycete-derived enzyme.     

苏丹Melut盆地的形成和演化

Melut盆地是在中非剪切带斜向张裂作用诱导下发育起来的中-新生代陆内裂谷盆地,其形成与演化与非洲板块、特别是中西非剪切带的演化密切相关。经历了三个大的演化阶段:前裂谷期阶段130Ma(K1)、同裂谷期阶段130Ma-20Ma(K1-N1)和后裂谷期阶段20Ma以后。     

Formation, Microstructure, and Properties of Barium Zirconium Sulfide Ceramics

The preparation, microstructure, and properties of BaZrS₃ ceramics are described. The compound was prepared by heating either an equimolar mixture of BaS and ZrS₂ or BaZrO₃ alone in CS₂ gas. The reaction of the BaZrO₃−CS₂ system was extremely rapid, as would be expected in an autocatalytic reaction caused by very strong reduction by CS₂. Well-sintered bodies were obtained only by the BaZrO₃−CS₂ reaction. The time dependence of grain growth was affected considerably when reaction and sintering occurred above 1250° C. Non-uniform grain growth which occurs when an excess of Ba is present can be interpreted in terms of secondary recrystallization resulting from segregation of BaS at the grain boundary during sintering. The BaZrS₃ ceramic was stable in air up to 550°C and was oxidized above that temperature.