塔里木盆地志留系沉积体系及分布特征

根据现代沉积学和层序地层学理论 ,对塔里木盆地志留系大量的岩心、测井和地震资料进行了综合研究。结果表明 ,研究区志留系可以划分成 2个沉积层序 ,又可分为 3个沉积体系 :(1)发育较高成分和结构成熟度的冲洗层理和前积序列的滨岸沉积体系 ;(2 )生物扰动构造发育的砂泥岩不等厚间互的滨外陆棚和斜坡沉积体系 ;(3)具平缓地势缺乏障壁岛的碎屑潮坪沉积体系。详细分析了这些沉积体系的岩性序列、沉积构造及粒度概率等沉积特征 ,建立了研究区碎屑海岸和碎屑潮坪沉积模式 ,确定了不同沉积相的平面分布规律。结果显示满加尔坳陷草 1井区为盆地的沉积中心。根据该区沉积相与生储盖层之间的关系 ,探明了塔北南斜坡滨岸砂岩和塔中北斜坡砂坪砂岩是今后勘探的有利地区。     

川西拗陷中段蓬莱镇组物源及沉积相展布特征

在野外剖面观测、岩心描述及测井资料分析的基础上,综合前人研究成果,对川西拗陷中段上侏罗统蓬莱镇组物源、沉积相类型、沉积环境的展布特征及演化规律进行研究。结果表明:(1)根据砂岩碎屑成分分析及物源区构造背景的分析,研究区具有自龙门山前缘至盆地中部砂岩的石英含量逐渐增多、沉积岩岩屑含量逐渐减少的特征,物源主要为西部的龙门山,而北部的米仓山—大巴山对研究区的影响较小。(2)川西拗陷中段蓬莱镇组主要发育冲积扇、河流、辫状河三角洲、湖泊四大类沉积相类型。(3)编制了川西拗陷中段蓬莱镇组砂岩质量分数等值线图及沉积相图,据此认为蓬莱镇组各个时期的沉积环境及砂体展布特征主要受到湖平面升降及物源供给的控制。蓬莱镇组第一段沉积时期,主要以发育冲积扇—湖泊沉积为特征;第二段沉积时期,冲积扇沉积及河流沉积范围逐渐扩大,辫状河三角洲沉积逐渐向湖盆推进,湖泊沉积的范围逐渐萎缩;第三段沉积时期,区内冲积扇沉积、河流沉积范围逐渐萎缩,而辫状河三角洲沉积规模较第二段沉积期增大,湖泊沉积变化不大;第四段沉积时期,主要以发育河流—湖泊沉积为特征,不发育冲积扇沉积,随着辫状河三角洲沉积的推进,湖泊沉积范围逐渐减小。     

鄂尔多斯盆地延长组下组合沉积期湖盆迁移演化及沉积响应

依据野外露头、岩心观察及实验室测试资料,对鄂尔多斯盆地延长组下组合长9、长10段沉积微相、岩矿特征、粒度特征及地层结构等进行了系统研究,结果表明:(1)延长组下组合沉积时期,湖盆沉积中心并不固定,从早期的"泄水区"逐步转变为"汇水区",湖盆沉积中心向西作大规模迁移。(2)沉积中心迁移导致盆地东南与西北沉积体系先后呈现出不对称发育的沉积格局,早期(长10期)西部(西北)与北部河流沉积体系强盛,基本无南部物源体系;晚期(长9期)开始发育南部(西南)物源体系。(3)盆地南部昆仑-秦岭洋由东向西呈"剪刀式"碰撞闭合是湖盆沉积中心迁移演化,以及沉积体系不对称发育的根源。(4)受湖盆沉积中心迁移演化的控制,长9与长10的有利勘探方向不同,长9期西部体系勘探前景最好;长10期河道砂体与上覆长9油页岩匹配,在纵向上可以形成"上生下储"式成藏组合,值得关注。     

歧口凹陷沙一下亚段重力流沉积特征及储层精细描述

探讨渤海湾盆地歧口凹陷沙一下亚段受葛沽物源控制的重力流沉积体系的平面特征、沉积机制以及沉积模式,探讨其优质储层的控制因素.以"构造-层序-沉积-储层"一体化研究为思路,通过对研究区岩心、测录井、三维地震、测试分析等资料的综合分析,葛沽物源控制的重力流沉积体系主要沿中央隆起带运移,在隆起带及隆起带两侧沉积,自北向南多级断...     

鄂尔多斯盆地陇东地区长4+5油层组物源分析及沉积特征

研究鄂尔多斯盆地陇东地区三叠系延长组长4+5油层组的物源及沉积特征.基于露头和岩心等资料,分析古水流方向、重矿物、轻矿物以及岩屑类型在平面上的差异分布特征,探讨靶区的物源方向及砂体分布特征.研究表明:陇东地区主要受东北、西南方向两大物源体系影响,西北和南部控制较弱,但仍有混源沉积的特点;物源供应的差异导致砂体分布具有明...     

塔里木盆地塔中地区志留系测井沉积相研究

根据常规组合测井、地层倾角测井及成像测井资料的测井相序列特征以及利用神经网络岩相处理结果,对塔中地区志留系沉积相类型及有利沉积相带的空间展布和古水流方向进行了研究.结果表明,将该区潮坪沉积划分为潮下带砂坪、潮间带砂泥坪和潮道、潮上带泥坪4个微相,与其他取心井段(或未取心井段)岩屑录井的对比符合率较高;该区志留系塔塔埃尔塔格组(下砂岩段)主要物源来自西北方向,次要物源来自东北方向.利用常规测井解释的岩性剖面、岩心刻度测井处理解释的沉积学倾角结果(沉积构造和古水流)和神经网络岩相处理解释成果,建立了塔中地区志留系关键井的测井沉积亚、微相解释模型.该模型为工区关键井垂向旋回叠置关系和沉积体系的空间展布特征研究提供了连续的、较准确的岩相剖面,对于海陆过渡相的层序划分对比和在塔里木盆地寻找隐蔽油气藏亦有一定的借鉴作用.     

鄂尔多斯盆地大牛地气田山西组沉积相研究

目的 研究鄂尔多斯盆地大牛地气田山西组沉积微相及其时空展布特征,为天然气勘探寻找有利储层.方法 综合运用岩心观察、薄片鉴定、测井相分析,以及稀土元素配分模式(REE)分析等手段,辅之以优势相编图法进行研究.结果 划分出1个相(辨状河三角洲)、1个亚相(辫状河三角洲平原)和3个微相(分流河道、泛滥平原、沼泽沉积微相),并确定物源区主要是活动性特征的再旋回造山物源区.结论 山西组内部各小层沉积相平面展布有很好的继承性,河道砂体总体都呈南北向展布,有利储层为辫状河三角洲平原分流河道.研究区主要受到北东方向物源的控制.     

鄂东神府地区山西组古沉积环境及沉积特征分析

将沉积地球化学与沉积学结合,对神府地区山西组沉积环境及沉积特征进行全面研究。地化资料分析表明,神府地区山西组沉积期水体为弱还原-弱氧化的淡水环境,古气候温暖湿润;重矿物资料和地化资料综合显示神府地区山西组物源方向为北东向,母岩性质主要为碱性玄武岩和花岗岩,物源区为盆地北部阴山古陆;进一步结合岩心、测井及实验资料,确定研究区山西组为曲流河三角洲前缘亚相沉积,发育分流河道,分流间湾、水下天然堤微相。     

东营凹陷滨南地区Es3下亚段湖相浊积岩精细物源研究

针对滨县凸起南坡沙三段浊积岩物源研究薄弱的问题,通过查阅前人的研究,利用岩心样品化验数据及钻井、测井资料,通过稀土元素分析法、砂岩组分分析法、沉积法三个方面进行精细物源分析。稀土元素分析结果结合岩屑特征的认识,认为研究区的母岩主要为变质岩,也存在少量火山岩母岩和沉积岩母岩。通过分析样品平面分布特征,结合砂体厚度以及砂泥比等直线图的认识,认为研究区存在两个主要物源方向,并对每个沉积方向的影响范围和强度变化进行了综合分析和厘定。研究区物源的研究有利于正确认识浊积岩的沉积特征,划分浊流沉积体系。     

泌阳凹陷毕店地区核桃园组核三段沉积特征与含油性研究

毕店地区位于多物源交汇带,沉积相带变化快,各个物源作用范围界定不清,受不同相带控制的砂体发育规律认识不清。通过对研究区沉积特征及含油性研究,对确定砂体规模和分布范围、寻找岩性-构造复合型油气藏有重要现实意义。本文在岩心、录井、测井及测试分析等资料研究基础上,认为研究区西部、北部、东北主要发育曲流河三角洲沉积体系,南部发育扇三角洲沉积体系以及东南部发育重力流与湖泊沉积体系;研究层段的基准面经历过6次上升和3次下降过程,在基准面相对较低时期,其主体沉积微相为水下分流河道、河口坝(前缘砂),沉积砂体较厚,水下分流河道延伸范围广,河道分支较多;在基准面相对较高时期,其主体沉积微相为远砂坝(席状砂)、湖相,沉积砂体薄,水下分流河道规模小、数量少,远砂坝及席状砂大面积发育。结合构造、生产动态数据,认为研究区油藏属于构造油气藏、岩性油气藏和复合油气藏,油气聚集受构造情况、优势沉积相,基准面升降等控制明显。     

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     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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