射频段岩石介电频散特性

对近 40 0块油田泥质砂岩样品测量结果进行了分析 ,给出了干岩样和含水岩样的介电频散曲线。由频散曲线看出 ,射频段 (2 0～ 2 70MHz)岩石介电常数随频率的变化服从幂函数规律 ,在此射频段中 ,可以实现频率的归一化 ,消除在不同频率下对同一地层测量结果的差异。同时 ,岩石介电频散程度受到含水饱和度、水矿化度、泥质含量等因素的影响     

岩石电阻率频散现象的实验研究

电介质理论分析和实验研究证明，岩石电阻率存在频散现象，主要是由于岩石松驰极化所致。在实际测井中，纯岩石及盐水溶液电阻率的频散可以忽略不计。随着岩石泥质含量、含油气饱和度的增高和饱印溶液浓度的降低，频散现象明显增强；随着测量频率的增高。所测岩石电阻率逐渐降低。在实际测井中，不同电阻率测井方法因使用频率不同，在泥质地层中的测量结果将存在差别。     

岩石电阻率频散现象的实验研究

电介质理论分析和实验研究证明，岩石电阻率存在在频散现象，主要是由于岩石松驰极化所致，在实际测井中，纯岩石及盐水溶液电阻率的频散可以忽略不计，随着岩石泥质含量，含油气饮和度的增高和饮和溶液浓度的降低，频散现象明显增强；随着测量频率的增高，所测岩石电阻率逐渐降低，在实际测井中，不同电阻率测井方法因使用频率不同，在泥质地层中的测量结果将存在差别。     

非德拜型介电弛豫

钛酸锶钡的超低频介电谱在复介电常数平面上给出一段圆弧 ,满足非德拜型弛豫的经验公式。但当频率高于 5Hz时 ,复介电常数的实验点显著偏离圆弧 ,组成一段直线。表明慢极化效应对低频至射频的介电测量有不容忽视的影响     

超高频(UHF)范围内沉积岩的介电特性

本文给出了在实验室用同轴测量线装置测得的沉积岩岩石样品的介电常数,分析了取自胜利油田的三类岩石样品的测量结果。讨论了岩石介电常数与频率、孔隙度、孔隙水的矿化度等的关系,提出对不同岩石类别应取的介电常数值,给出了计算孔隙度公式。所得出的结论对电磁波传播测井曲线的解释和电磁波传播测井仪器的设计有一定意义。     

层状管道结构频散曲线绘制及试验验证

目的推导层状管道结构中超声导波的频散方程,利用频散方程绘制其频散曲线,并通过试验来验证频散曲线的正确性.方法基于Navier波动方程并根据边界条件建立了层状管道结构的频散方程.从理论上分析了层状管道结构中三种模态超声导波的传播特性.根据推导出超声导波的频散方程,通过数值方法绘制出了超声导波在层状管道结构中的频散曲线.对超声导波的频散曲线和位移特点进行了分析,并选出适合激励的超声导波频率.构建与数值计算层状管道模型相同的试验系统并进行试验研究,利用试验验证了所建立的频散曲线的正确性.完成了层状管道结构纵向波动试验,激励频率在1~9 k Hz,对试验结果与理论值进行对比和误差分析.结果L(0,1)在管道结构中传播速度与理论值最大误差值为1.5%,可以发现两者相似度较高.结论笔者所绘制的频散曲线能够较为理想的反映出超声导波在层状管道中传播的真实情况,这对实际检测中激发信号的频率和模态的选择具有重要意义.     

下期要目

曾联波　　大民屯凹陷静北潜山油藏裂缝及其渗透特征李素梅　　原油中吡咯类化合物的分布特征吴智勇　　辽河西部凹陷曙 10 3块潜山油藏储层特征金　强　　裂谷盆地火山活动与油气藏的形成戴俊生　　柴达木盆地背斜构造的类型及含油气性分析谢然红　　射频段岩石介电频散特性张满郎　　准噶尔盆地彩参 2井侏罗纪孢粉化石及其在层序地层学中的应用侯连华　　自然电位基线偏移影响因素的实验研究赖泽武　　储层结构目标建模研究许建华　　羌塘盆地中上侏罗统碎屑岩储集层成岩演化特征杨少春　　胜坨油田二区高含水期三角洲储层非均质特征张　…     

Lamb波频散曲线快速计算与绘制

超声Lamb波已成为快速检测各种金属板材与薄壁管件健康质量的重要手段,但由于其传播过程中的频散和多模态特性使其在应用上受到了一定程度的限制。应用中若相关参数选择不当,会使得检测回波信号相互叠加而难以识别,快速精确的计算频散曲线则是正确选择参数的基础。基于此,在详细分析频散曲线特点的基础上,引入了曲线追踪法,并利用该方法完成了相应的软件设计,实现了频散曲线的快速绘制。该软件可用于各种材料的Lamb波频散曲线快速绘制,为检测中的Lamb波模态选择、发射频率等相关参数设置提供了可靠的理论依据。     

基于面波多道分析法的无砟轨道性能劣化反演方法

提出了基于面波多道分析法的无砟轨道性能劣化反演方法。以无砟轨道理论面波频散曲线为基础，分析具有不同劣化程度的无砟轨道面波频散特性，构建无砟轨道性能劣化反演方法，并研究激振频率与检波器布设方式对反演效果的影响。结果表明：无砟轨道的面波频散曲线在低频与高频段分别取决于CA砂浆与轨道板的横波速度。为提高反演效果，建议将激振频率取为50 kHz，最小偏移距取大于或等于0.05 m，道间距取0.05 m，并尽可能增大检波器排列长度。     

基于分数阶傅里叶变换的声表面波涂层厚度检测

为了实现对激光激发声表面波时域信号进行频散分析转变为声表面波频散曲线进而对基体-涂层材料涂层厚度的无损检测这一过程,提出了一种基于分数阶傅里叶变换的激光激发声表面波频散曲线获取方法.对时域信号进行分数阶傅里叶变换可以在一定的变换阶次p形成脉冲峰,利用脉冲点的坐标值可以直接获取信号的调频率与中心频率,进而可以计算得到原信...     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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