济阳坳陷中生界碎屑岩储层储集空间特征及控制因素

济阳坳陷中生界碎屑岩储层储集空间主要为溶解孔隙和裂缝,溶解物质主要为长石、岩屑等碎屑颗粒及碳酸盐胶结物;裂缝主要包括构造裂缝、压实裂缝和解理缝.构造裂缝主要形成于燕山期和喜山期,主要分布于不整合面附近的砂体中.碎屑岩储层储集性能主要受沉积作用、构造作用和成岩作用的控制,沉积作用是最重要的控制因素.其中三角洲砂体物性最好,河流砂体次之,冲积扇、扇三角洲及滨浅湖砂体物性较差.构造作用对储集物性的改造主要表现为断层活动和不整合,不整合面之下约100 m内储层裂缝和溶解孔隙最发育、物性明显提高.成岩作用对储层物性的影响受沉积作用和构造作用的控制,对储层的改造程度与沉积相带及距不整合面的距离有密切关系.中生界最有利的碎屑岩储层为不整合面之下约100 m内的河流或三角洲砂体.     

羌塘盆地侏罗系低渗透砂岩储层成因分类及有利储层预测

羌塘盆地侏罗系地层厚度大 ,分布面积广 ,砂岩储层发育 ,但砂岩储集物性及孔隙结构普遍较差 ,现有露头样品分析表明 ,其储层主要为低特低渗储层。侏罗系低渗砂岩储层特征主要受沉积相带与压实、胶结等成岩作用的控制。依据其储层的控制因素 ,将其划分为强压实型、中等压实碳酸盐胶结型、强压溶石英次生加大型、泥质包壳粘土矿物胶结型、沥青充填型、不稳定组分溶解溶蚀型 6种低特低渗砂岩储集层类型 ,这些类型各具不同的储集潜力和分布范围。其中 ,发育于三角洲前缘等相带中的不稳定组分溶解、溶蚀型低渗砂岩储层储集性能较好 ,为羌塘盆地最有利的碎屑岩储层。     

羌塘盆地侏罗系低渗透砂岩储层成因分类及有利储层预测

羌塘盆地侏罗系地层厚度大,分布面积广,砂岩储层发育,但砂岩储集物性及孔隙结构普遍较差,现有露头样品分析表明,其储层主要为低一特低渗储层,侏罗系低渗砂岩储层特征主要受沉积相带与压实,胶结等成岩作用的控制,依据其储层的控制因素,将其划分为强压实型,中等压实-碳酸盐胶结型,强压溶-石英次生加大型,泥质包壳-粘土矿物胶结型,沥青充填型,不稳定组分溶解-溶蚀型6种低一特低渗砂岩储集层类型,这些类型各具不同的储集潜力和分布范围,其中,发育于三角洲前缘等相带中的不稳定组分溶解,溶蚀型低渗砂岩储层储集性能较好为羌塘盆地最有利的碎屑岩储层。     

济阳坳陷埕岛-桩海地区中生界潜山储层岩性与储层质量

本文以渤海湾盆地济阳坳陷埕岛-桩海地区中生界复杂岩性潜山型储层为研究对象,对储层岩石学特征、储集空间类型和储层物性差异进行研究,进而讨论储层质量控制因素。研究结果表明,研究区内储层包含火成岩和碎屑岩两大类,火成岩以安山岩和火山角砾岩为主,分布局限;碎屑岩形成于辫状河三角洲相,是研究区储层发育的有利岩性。有效储层储集空间类型以次生溶蚀孔为主,残留原生气孔是安山岩中的主要孔隙,裂缝常被方解石充填。研究区储层非均质性强,样品孔、渗值分布范围大。储层质量受到多种因素控制,从根本上而言,不同岩性-岩相或沉积相的样品初始孔隙度差异明显,初始孔隙度较高储层其现今孔隙度也较好;对于相同岩性岩相的储层而言,成岩作用差异是决定性因素,压实和碳酸盐胶结作用是研究区储层主要的减孔作用。     

板桥和歧北凹陷沙河街组深层碎屑岩储层物性特征及其影响因素

对黄骅坳陷板桥和歧北凹陷深层沙河街组碎屑岩储层储集物性分布特征及其影响因素分析表明，深层碎屑岩储层物性在横向上受砂体微相控制，在纵向上受次生孔隙发育带控制，并具有强烈的非均质性。在板桥和歧北凹陷中，沙二、沙三段深层碎屑岩的有利储集相带与有利沉积相带及碎屑组分的溶解作用带具有明显的一致性。深部异常高压带、烃类的早期侵入和有利的储层埋藏史对于深层碎屑岩储层具备良好的储集空间及含油气性创造了条件。     

惠民凹陷古近系碎屑岩储集体成因类型及特征分析

对惠民凹陷在古近系碎屑岩储集体的成因特征进行了分析研究.发现成因类型有:冲积扇、河流、近岸水下扇、扇三角洲、深水浊积扇、三角洲、三角洲前缘滑塌浊积扇以及滨浅湖滩坝.储层岩石类型有砾岩、含砾砂岩、中细砂岩及粉砂岩.不同成因类型的碎屑岩储集体成分成熟度和结构成熟度差异较大,三角洲河口坝及滨浅湖滩坝砂体成分成熟度和结构成熟度最高.不同成因类型储集体的物性特征不同,三角洲平原分支河道、(扇)三角洲前缘水下分流河道及河口坝砂体储集物性最好,其次为(扇)三角洲前缘席状砂及滨浅湖滩坝砂体,近岸水下扇和浊积扇砂体物性相对较差.     

板桥和歧北凹陷沙河街组深层碎屑岩储层物性特征及其影响因素

对黄骅坳陷板桥和歧北凹陷深层沙河街组碎屑岩储层储集物性分布特征及其影响因素分析表明 ,深层碎屑岩储层物性在横向上受砂体微相控制 ,在纵向上受次生孔隙发育带控制 ,并具有强烈的非均质性。在板桥和歧北凹陷中 ,沙二、沙三段深层碎屑岩的有利储集相带与有利沉积相带及碎屑组分的溶解作用带具有明显的一致性。深部异常高压带、烃类的早期侵入和有利的储层埋藏史对于深层碎屑岩储层具备良好的储集空间及含油气性创造了条件。     

鄂尔多斯盆地陇东地区长9油层组储层沉积学特征

通过对36口井的岩心观察描述和108件样品的铸体薄片鉴定、扫描电镜、物性、孔隙结构分析的综合研究,表明鄂尔多斯盆地陇东地区三叠系延长组长9油层组属于浅水三角洲沉积体系,储集岩主要为三角洲平原水上和前缘水下分流河道微相的灰色中-细粒岩屑长石砂岩,储集空间以剩余原生粒间孔为主,次为粒间和粒内溶孔,少量铸模孔,喉道以中、细喉为主,储层物性中等略偏差,属中-低孔、低渗孔隙型储层。储层发育受沉积作用、砂体厚度和成岩作用复合控制,可划分为4类储层,有利于储层发育的沉积微相依次为水下分流河道、水上分流河道及河口坝砂体,好的Ⅰ、Ⅱ类储层主要发育于水下分流河道砂体中。     

济阳拗陷桩西地区中生界火成岩储层控制因素

渤海湾盆地济阳拗陷桩西地区中生界西洼组和蒙阴组发育火成岩储层.通过对火成岩储集空间及储层控制因素的综合分析,结果表明桩西地区火成岩主要发育气孔、基质内溶蚀孔隙和构造裂缝3类储集空间,储层物性主要受岩性、岩相和成岩作用控制.杏仁孔状安山岩和火山角砾岩经构造运动和溶蚀作用改造形成大量连接气孔和溶孔的构造裂缝,具有良好的储集性能.次生矿物充填及压实作用显著降低安山岩储层物性,导致岩体边缘及顶部比中部及下部物性好;火成岩溢流相、爆发相的相交部位岩体厚度较大,易于形成裂缝.活动断层附近、各喷发旋回之间形成的不整合面之下的巨厚安山岩发育区控制了火成岩有利储层的发育.     

吐哈盆地台北凹陷侏罗系储层砂体发育及其岩石学特征

根据薄片、扫描电镜和X-衍射等测试资料以及砂岩厚度统计,分析了吐哈盆地台北凹陷侏罗系储层砂体发育及其岩石学特征。研究区发育辫状河三角洲、扇三角洲和滨浅湖滩砂3种储集砂体,受控于南、北两大物源体系。储集岩主要是岩屑砂岩类,岩屑含量高,陆源杂基多,成分与结构成熟度均较低,但南、北物源砂体储集岩特征有明显差异。北物源主要是扇三角洲砂体,岩屑砂岩,储集性能差,属低-特低孔、低-特低渗型储集层;南物源主要是辫状河三角洲砂体,长石岩屑砂岩,储集性能较好,以低孔、低渗型储集层为主,部分中孔、中渗型储层。碎屑岩储层岩石学特征与储集性能关系密切,结合砂体发育对其研究,对寻找有利储集体具有重要意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

英文诗歌中的喻类修辞

为了有助于提高英文爱好者的个人情操、文化素养和学习兴趣,以及专业人员对英语学习和研究进行多途径的探索,本文通过一些精选诗歌的引证和分析,着重论述了喻类修辞法在英文诗歌中的运用其及效果。     

Man Is Unable to Change the Miserable Life——Analysis of the Arrangement of Four Characters in The Glass Menagerie

Tennessee Williams is considered as one of the most important American playwrights since World War II.The Glass Menagerie is his first successful drama,which describes a tragic situation of family and means to say that Man is unable to change the miserable life,no matter whatever means he try,This essay focuses on the analysis of the arrangement of the four main characters:Laura.Amanda,Jim and Tom to reveal the theme.Laura is fragile.Amanda is brave.Jim is vital.Tom is sensible.And all of them develop and try the different means to struggle against life,but fail tragically.With the evidence,the paper comes to conclusion naturally that Man is unable to change the miserable life,and he dooms to fail.     

Characterization of root-nodulating bacteria on Retama raetam in arid Tunisian soils

The aim of this study is to investigate the diversity of Retama raetam root-nodule bacteria isolated from arid regions of Tunisia. Twelve isolates, chosen as representative for different 16S rRNA gene patterns, were characterized by 16S rRNA gene sequencing and phenotypic analysis. Isolates were assigned to Sinorhizobium, Rhizobium and Agrobacterium. Symbiotic properties of Sinorhizobium and Rhizobium isolates showed a large diversity in their capacity to infect their host plant and fix atmospheric nitrogen. Strain RK 22 identified as Rhizobium was the most effective isolate.     

Features of Women''s language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Affordable Accurate Evaluation of the Binding Conformations Predicted by Molecular Docking Studies in Bio-System

正Recently,docking has been widely used to predict the binding-modes of protein-inhibitors,when the crystal complexes structure was absent.Most docking algorithms are able to generate a large number of probable conformations,it,however,is difficult to effectively evaluate these docking poses and identify the most reasonable bindingmode.In the present study,on the basis of the crystallographic data of human 3-hydroxy-3-methylglutaryl coenzyme