潜江凹陷蚌湖地区潜江组超压成因机理

蚌湖向斜带位于潜江凹陷中部,其潜江组普遍发育超压系统.综合超压成因机理的各种分析方法,基于测井曲线特征和烃源岩成熟度特征,从压实不均衡和生烃作用两方面对蚌湖地区的超压成因机理进行了系统分析.研究结果表明,1在超压段泥岩声波时差曲线偏离正常压实线,其拐点深度为2150~3180 m,蚌湖地区储层实测超压顶界面深度约为2200 m,在埋深较浅地区,超压成因以不均衡压实作用为主,在埋深较大地区,超压成因为不均衡压实和生烃共同作用;2超压顶界面埋深与生烃门限表现出较好的一致性,在2200 m深度其镜质体反射率Ro值为0.55%,说明生烃作用对蚌湖地区超压的发育亦具有一定的贡献,由此认为,压实不均衡和生烃增压作用是蚌湖地区超压发育的主要机理.     

饶阳凹陷洼槽区地层压力特征及成因机制

根据地层压力实测数据和地层压力模拟计算,对饶阳凹陷洼槽区的地层压力分布特征及其成因机制进行研究。结果表明:饶阳凹陷洼槽区古近系普遍发育超压;纵向上,存在东营组、沙一段和沙三段三套超压层系;可划分为单超压结构和双超压结构,其中双超压结构可细分为上强下弱、上弱下强和上下均势3种类型;平面上,超压中心与洼槽沉积中心相吻合,河间和留西洼槽超压幅度最大;从沙三段到沙一段,南部洼槽区超压规模明显减小,北部洼槽区超压规模略增,超压中心具有从南到北的迁移性;东营组超压成因机制主要为欠压实作用,沙一段和沙三段的超压成因机制为生烃作用与欠压实作用的混合增压机制;由于欠压实与生烃两者对超压的贡献比例差异,造就了研究区多种超压结构并存的现状,并影响了油气的空间分布。     

准噶尔盆地车排子周缘地层超压特征及其与油气成藏的关系

以钻井、测井相关资料为基础,分析车排子周缘的超压分布特征及形成机制,研究超压对油气藏形成的影响,结合油气藏空间分布特征,探讨研究区超压分布与油气成藏的关系。研究结果表明:在纵向上,发育古近系安集海河组与侏罗系八道湾组—三工河组上下2套超压层,其主要形成机制分别为泥岩欠压实和有机质生烃;在平面上,超压主要分布在研究区南部,向北压力逐渐减小。超压对抑制成岩作用、减缓压实作用、产生微裂缝以提高储层储集性能、增强对油气的封盖能力以及促进油气的初次运移具有重要控制作用。超压与油气藏分布具有3种空间配置模式,即油气藏分布于超压层之上、油气藏分布于超压层内部以及油气藏分布于超压层之下。     

南海北部超深水区兴宁凹陷古近纪沉积充填特征

探讨南海北部兴宁凹陷古近纪沉积充填特征,为超深水油气勘探提供基础地质依据。结合邻区研究成果,通过系统的地震层序地层学和地震相等综合分析,表明兴宁凹陷古近系文昌组、恩平组和珠海组之间均为不整合接触;古近系共识别出12个Ⅲ级层序。文昌组、恩平组为陆相湖盆沉积,具有缓坡带三角洲发育、缓坡浅水区滨浅湖发育、陡坡带扇三角洲发育及凹陷中心部位半深湖-深湖发育的特点;珠海组则为浅海三角洲沉积。总体的海侵沉积过程形成了恩平组湖相泥岩烃源岩与文昌组和珠海组砂岩储层的时空组合,指示研究区具有一定的油气勘探潜力。     

渤海湾盆地东濮凹陷压力演化与超压形成机制

通过实测压力、泥岩声波时差、流体包裹体古压力恢复及盆地模拟,对东濮凹陷北部地区地层压力的演化和现今压力特征进行分析,结合岩心观察解析超压的形成机制,探讨不同机制对超压的贡献率。结果表明:剩余压力的演化经历"超压原始积累-超压释放-超压重新形成"3个阶段,两次超压的形成时期与油气成藏的时期相对应;古今超压的空间展布均受构造格局、断裂活动和膏盐岩分布的控制,洼陷带以及盐下、盐间地层的剩余压力较大;超压的形成主要为欠压实作用、生烃作用及膏盐岩作用的结果,生烃作用对超压的贡献率与烃源岩的热演化相关。     

海上一体化地震勘探技术在珠江口盆地东部恩平凹陷油气勘探中的应用

利用地震资料采集、处理、解释、Ⅱ级构造带评价及含油性预测等海上一体化地震勘探技术,探索珠江口盆地东部恩平凹陷油气勘探有利构造区带.结果揭示恩平凹陷存在6个Ⅱ级构造带,其中“EP17洼南部隆起翘倾断裂构造带”为恩平凹陷油气勘探最好的Ⅱ级构造带,具较大的油气勘探潜力.经钻探,在上述Ⅱ级构造带获得了油气勘探重大突破,先后发现、落实和升级油田5个,建立了珠江口盆地东部第一个自营油田群.“EP 17洼南部隆起翘倾断裂构造带”油气勘探获得重大突破,揭示恩平凹陷的EP17洼为富生烃洼陷,预示同为EP17洼合油气子系统的“EP17洼西部古隆起翘倾断裂构造带”具较大的油气勘探潜力,应为下一个油气勘探的最有利地区.     

东营凹陷古近系储层超压成因及其成藏意义

利用实测地层压力资料,系统研究了东营凹陷古近系碎屑岩储层超压成因及其与油气成藏的关系,并总结了超压油气藏的分布模式。超压传递（包括超压接触传递和超压连通传递）、欠压实、原油裂解是东营凹陷古近系碎屑岩储层超压的主要成因机制。超压接触传递能够使与烃源岩接触的储层形成强超压高产油气藏,该类油气藏主要分布在北部陡坡带、中央隆起带周缘以及洼陷中央的沙三、沙四段和孔店组;超压连通传递使深层超压流体进入浅层,形成中超压高产油气藏,该类油气藏集中分布在中央隆起带的沙一、沙二段和南部缓坡带的沙三、沙四段;欠压实发生在沙四段、孔店组的膏盐岩层段,不利于油气成藏;原油裂解发生在埋深超过4000m的地层,与油气成藏没有必然的联系。     

复合超压生烃系统内不同成因油气的运移流向分析

牛庄洼陷2套生油岩纵向上叠置,有机地球化学特征、成烃期次及油气运聚过程都存在差异,并伴有异常流体压力,这就构成了复合型超压生烃系统.基于油-源对比和同源油气藏空间分布规律,对叠合型超压生烃系统油气运移流向的差异性进行了分析.研究表明,在断层活动的诱发下,超压驱动"沙三下源型"油主要发生纵向运移;但在超压带盖下"沙四上源型"油主要发生侧向运移,而纵向运移在超压系统发育区相对不活跃.超压系统的自组织行为对油气运移流向具有重要的控制作用,导致"沙三下源型"和"沙四上源型"油气运移及分布规律差异较大.通过复合型超压生烃系统内不同成因的油气运移流向分析,可以进一步认识研究区油气运移和富集规律,进而"分源"挖掘油气勘探潜力.     

东海盆地西湖凹陷平湖构造带超压系统与油气成藏

应用流体包裹体分析、盆地模拟和有机地球化学等手段,研究东海西湖凹陷平湖构造带超压系统与油气成藏的相互关系。研究结果表明:平湖构造带油气主要来源于平湖组煤系源岩,而且油气主成藏期为晚期,与生烃增压的形成期大致相同,另外油气藏多分布在超压顶界面附近,这些均指示超压与油气成藏存在密切关系;镜质体反射率、地温梯度及包裹体均一温度反映的热异常,储层物性、非均一捕获的包裹体、"气烟囱"反映的流体压力异常、凝析油轻烃组分反映的组分异常证实研究区流体在超压主导下晚期高效率快速流体;高压流体的泄压排放诱发断裂开启,并为流体运移提供动力,从而控制油气在超压界面附近高效成藏。     

沾化凹陷渤南洼陷古近系压力特征及成因机制

根据实测压力、泥岩声波时差等资料,对沾化凹陷渤南洼陷地层压力的分布特征、演化规律及其超压形成机制进行分析。结果表明:渤南洼陷实测地层压力随深度的变化呈现明显的"二台阶"式,第一台阶对应着2.35 km,该台阶之上表现为常压,之下开始出现低幅度超压;第二台阶对应地层埋深为3.0 km,该台阶之下超压明显,压力系数可达1.8,其中沙三中下、沙四上亚段是异常高压发育的主要层系;欠压实和生烃作用是渤南洼陷异常压力形成的主要原因,且超压机制存在区域差异,中部断阶带和南部缓坡带表现出明显的欠压实现象,其深度范围与超压的第一台阶相对应;深洼带超压泥岩的密度则随埋深的增加而增大,与成熟生烃范围匹配较好,生烃作用是该区的主要增压因素,且深度与第二台阶相对应;研究区欠压实与生烃导致沙三段压力的增加幅度不同,两因素具有各自的增压量化模型,导致地层压力出现了"二台阶"的特征。     

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.     

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.     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with