渤海中部海域大型湖底扇地球物理响应及勘探意义

针对渤海中部海域大型湖底扇边界识别及富砂性预测难度大的问题,基于砂质碎屑流湖底扇沉积模式,综合利用古近系东营组第二段下亚段钻井岩性、测井、薄片、地震数据等资料,对湖底扇沉积特征、地震响应特征进行系统分析和描述.在此基础上,利用地层切片、多属性预测及正演模拟等技术对湖底扇内幕进行刻画,落实内部多期扇体的空间分布特征,预测有利砂体发育部位.该湖底扇毗邻烃源岩,岩性圈闭面积大,盖层广泛发育,油气运移聚集条件优越,是岩性油气藏勘探的重要靶区.     

叠前多重降维复杂岩性预测技术——以元坝西部须三段为例

川东北元坝西部地区上三叠统须家河组第三段岩性复杂多样,储层岩性以钙屑砂岩为主,不同类型岩性地球物理响应特征差异小,岩性预测难度大.针对上述难点,开展叠前多重降维复杂岩性预测技术研究.多重坐标变换逐次降维可将2个弹性参数合并成1个岩性区分能力最大的新弹性常数,用于识别目标岩性.提出了基于叠前多重降维分析的岩性预测的实现流程,以岩石物理分析为基础,多重坐标交换降维为核心,对相控约束叠前弹性参数反演得到的弹性参数数据体进行多重降维,从而实现复杂岩性分布预测.元坝西部须三段钙屑砂岩预测的应用分析证实了该方法预测精度高、实用性强.     

复杂沉积区的岩性预测技术及其在银额盆地哈日凹陷的应用

目的 以现代油气勘探理论为指导,运用测井和地震联合反演方法,预测银额盆地复杂沉积区的岩性.方法 采用不同岩性具有不同的地球物理特征选取岩性预测参数、根据既具备自然伽马、补偿中子的高频信息,又包含声波的低频信息的拟声波曲线耦合地震数据有效区分砂岩、泥岩和白云岩,利用层位标定和子波反演的交互迭代运算,建立集地质、测井、地震的地质框架,再利用一定的插值方法对层内的测井数据进行内插和外推,进而建立波阻抗模型.结果 (1)白云岩主要在银根组,分布较为广泛;(2)砂岩发育层系较多,在苏红图组、巴音戈壁组均较为发育,主要以陡坡带上的扇三角洲和冲积扇为主;(3)灰质泥岩主要分布在断陷的中央深凹带,以巴音戈壁组最为发育;(4)火山岩分布较为局限,仅在哈日凹陷发现,且受断裂控制,沿断裂展布.结论 全局寻优迭代的岩性预测技术地质意义明确,可以准确表征不同岩性,精细预测岩性分布,适用于复杂沉积区的岩性预测.     

运用多地震属性和神经网络预测岩性

利用多地震属性和BP神经网络可以得到胜利油田垦71地区的岩性预测.由井附近的地震道中可以提取井数据和多地震属性,并由此得到岩性信息,再用BP网络对岩性信息进行标定.岩性分布是基于训练好的网络和该地区的多地震属性进行计算的,结果与该区域未参加训练的井资料相比符合率为75%.     

砂泥岩地层概率神经网络岩性反演技术应用研究

概率神经网络是一种基于概率密度函数理论的神经网络,能够广泛地应用于模式识别等领域.针对地震岩性反演预测问题,提出了一种具体的概率神经网络方法,包括网络模型的构造和预测识别步骤等.研究区主要目的层为沙溪庙组沙一段湖滩砂及河道砂体,储层单层厚度小,岩性横向变化较大,利用地震资料进行常规储层预测较困难.为此,根据该区储层的测井响应特征、地震属性特征与地质岩性特征的相关性,利用概率神经网络方法对地震属性数据做变换,从而对地层特征进行预测识别.     

聚类和判别分析在测井岩性识别中的应用

应用多元统计方法和计算机技术对测井数据进行岩性识别.以济阳坳陷中的某钻井测井资料为例,首先进行了层次聚类和k-means聚类分析,然后根据聚类分析结果进行判别分析,两种统计方法相结合识别钻井岩性,得出了预测岩性剖面和录井剖面基本吻合的综合柱状图.结果说明,聚类分析和判别分析相结合的定量方法在测井岩性识别方面具有实用价值.     

寺家庄矿煤层顶板岩性有色反演预测

煤层的顶板岩石的封堵性对煤层气的储集非常关键。有色反演可以获得相对波阻抗的变化,对测井的依赖度低、平面分辨率高,可用于少井区煤层顶板岩性的分布进行预测。在原始地震数据谱蓝化处理、提高分辨率的基础上,对寺家庄矿三维地震数据进行了有色反演,预测了9号、15号煤层顶板岩性。结果表明:相对波阻抗体异常与钻孔岩性较为吻合,并通过相对波阻抗平面分布图预测了寺家庄地区9号、15号煤层顶板岩性,且不同时间地层切片的反演结果与区域钻孔资料相吻合,说明有色反演结果可靠,可以对煤层顶板岩性分布特征进行有效预测。     

基于小波变换和卷积神经网络的地震储层预测方法及应用

提高储层预测的分辨率和准确性一直是油气藏表征的一个关键问题。将频谱分解与深度学习相结合,提出基于小波变换和卷积神经网络的地震岩性、储层类型预测方法。小波变换能够提供包含高频和低频信息的二维时频谱图,卷积神经网络具有超强的二维图像特征提取和分类能力,时频谱图作为卷积神经网络的输入,有助于充分挖掘地震数据高频和低频信息进行岩性和储层预测。将提出的方法应用于川西沙溪庙组储层预测中,首先利用叠后地震数据预测得到河道砂体分布,然后利用叠前地震数据在河道内部预测储层类型分布。结果表明,深度学习反演预测岩性和储层类型的分辨率和精度更高,能够识别小河道砂体,与生产测试情况更加吻合,优于常规地震反演方法。     

川西岩性气藏地震勘探关键技术研究

三维地震勘探是支撑川西地区岩性气藏储层预测和井位部署的关键技术.通过对川西拗陷侏罗系岩性气藏勘探地震采集、处理、解释、储层及流体预测5个方面的研究,研制、总结了采集设计和野外质量控制的2个关键环节,做好保幅处理,坚持“整体、自动、精细”3个基本解释准则,储层预测中依靠振幅资料,流体预测中充分利用频率和吸收参数等物探关键...     

基于岩石物理分析的致密砂岩流体检测方法研究

在致密砂岩气藏的勘探中,利用地震属性检测流体对致密砂岩气藏的高效开发显得尤其重要.由于地震是岩性、孔隙度、流体等地质因素的综合响应,因此优选敏感流体属性至关重要.从苏里格气田西区某区块为例,从基础岩石物理数据出发,优选出了适合致密砂岩岩石物理模拟的岩石物理模型.系统研究了储层弹性参数与岩石岩性、孔隙度、含气饱和度变化的关系;并通过多变量正演模型筛选出对流体敏感的属性.研究表明:采用Brie模型对Xu-White模型进行改进后更适合致密砂岩储层的岩石物理模拟,利用地震数据检测含气饱和度是可行的,应用P+G属性能够较好的预测致密砂岩的含气饱和度.所采用的思路与方法,对其他类型的气藏检测方法优选具有较好的借鉴意义.     

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