低孔低渗储层成岩相测井识别—以神木气田上古生界为例

以物性、铸体薄片、X衍射、扫描电镜等基础测试资料将神木气田山西组及太原组划分为5种成岩相类型,结合自然伽马、声波时差、中子、密度、电阻率测井资料,建立了测井响应与成岩相之间的对应模型。利用该模型对双34井进行单井成岩相划分,并通过铸体薄片资料对其准确性进行验证。根据成岩相测井识别结果,对本区其余开发井进行解释划分并绘制成岩相平面分布图。     

川西坳陷什邡-德阳-广金地区蓬莱镇组致密储层成岩相表征

利用铸体薄片、扫描电镜、岩心观察等资料,对川西坳陷蓬莱镇组储层成岩相类型进行划分,建立成岩相测井识别标准,研究区蓬莱镇组成岩相展布、不同成岩相物性、成岩相主控因素。结果表明,将研究区储层划分为溶蚀孔隙成岩相、斑状溶蚀孔隙成岩相、致密胶结成岩相和致密压实成岩相四种成岩相类型;选取深浅侧向、自然伽马、声波时差、密度和补偿中子6条测井曲线,建立了四种成岩相的测井识别标准。以MJ102井为例实现成岩相的剖面划分;并以蓬三段三砂组的成岩相平面展布与沉积相图对比研究。揭示成岩相的分布主要受沉积环境控制;且溶蚀孔隙成岩相和斑状溶蚀孔隙成岩相物性最好,主要发育在分流河道微相中。     

塔里木盆地大北地区巴什基奇克组成岩相测井识别

依据成岩序列和成岩阶段划分原理,结合储层岩心观察、铸体薄片、阴极发光,扫描电镜、X射线衍射等资料,对塔里木盆地大北地区巴什基奇克组成岩相定量划分及测井表征进行研究。结果表明:塔里木盆地大北地区巴什基奇克组划分为强压实相、不稳定组分溶蚀相、钙质胶结相、构造裂缝相4种成岩相类型;将综合成岩系数作为成岩相表征的参数,相比前人的研究方法能够很好地解决成岩相定量划分的问题;综合成岩系数的测井资料计算可以实现测井资料模块化处理定量识别成岩相;提出的成岩相识别新方法与岩心分析资料形成良好的印证,方法准确可靠。     

文南油田沙三中亚段储层成岩相研究

文南油田是我国一个典型的低渗透油田,通过岩心的观察以及岩心分析数据研究,对文南油田沙河街组沙三中亚段砂岩成岩作用、成岩矿物进行研究。将研究层段的成岩相划分为粒间溶孔发育成岩相、斑状溶蚀成岩相(碳酸盐式和假杂基式)、致密胶结成岩相(碳酸盐基底式和碳酸盐孔隙式)、致密压实成岩相共四类成岩相及四类成岩亚相。分析不同成岩作用的测井响应特征,选取深浅侧向、自然伽马、密度、声波等测井曲线建立成岩相测井响应模式和成岩测井相模型。对研究区成岩相发育的影响因素进行系统研究,认为沙三中亚段砂组成岩相的发育受砂岩组分和胶结物含量的影响。     

基于PCA-BP神经网络的非常规储层岩性识别研究

岩性识别一直是储层测井解释的关键问题和难点之一。针对常规测井岩性识别准确率不高的状况,在分析测井资料的基础上,以Matlab为平台研究了基于主成分分析的PCA-BP神经网络,并以济阳坳陷非常规储层实际测井资料为样本,通过设计算法步骤进行了实验仿真。由仿真结果得出非常规储层岩性识别率为95.8%,高于BP神经网络,PCA-BP神经网络有效提高了识别率和运行速度。经过对济阳坳陷钻井的岩性识别表明,该岩性识别方法可行并具有实用价值。     

靖安油田大路沟区长6油层组储层成岩作用与成岩相

靖安油田大路沟区长6油层组储层主要为湖泊三角洲前缘水下分流河道沉积,岩性主要为长石细砂岩、中—细砂岩.根据大量的铸体薄片、X衍射、扫描电镜、镜质体反射率等分析资料,研究了大路沟区长6储层砂岩的成岩作用类型、成岩阶段及成岩演化序列,分析了各种成岩作用对储层物性的影响.在成岩作用研究的基础上,划分出了绿泥石-浊沸石胶结相、绿泥石-方解石胶结相、方解石胶结相、泥质胶结相及浊沸石-长石溶蚀相等5种成岩相类型,其中以浊沸石-长石溶蚀相砂体物性最好.依据所建立的主要成岩相类型与测井曲线的对应关系,研究了各小层砂体的浊沸石-长石溶蚀相分布范围.     

测井地质结合定量评价低渗透储层成岩相

高邮凹陷南断阶低渗透储层同一沉积微相产能差异变化大。利用铸体薄片、阴极发光、扫描电镜等资料,对高邮凹陷南断阶阜宁组储层成岩作用类型及特征进行了综合研究,在此基础上结合实际生产应用,将研究区阜一段储层划分为弱压实成岩相、中等压实胶结成岩相、中等压实溶解成岩相、强压实胶结成岩相和强压实溶解成岩相5 种成岩相类型,建立了不同类型成岩相测井曲线特征,确定了不同成岩相的定量判别标准,利用判别标准定量识别研究区阜宁组阜一段储层成岩相,结合产能评价有利成岩相。     

高尚堡油田深层沙三2亚段沉积微相及成岩储集相特征

 为了明确高尚堡油田深层沙三2Es₃²亚段沉积微相、成岩储集相特征及各类成岩储集相的成因机制,利用区域地质、测井、砂岩薄片、铸体薄片、扫描电镜、X衍射分析等多种方法对沉积相、成岩作用及其影响因素进行综合研究,并在此基础上进行成岩储集相划分,探讨各类成岩储集相的成因机制。结果表明,该区Es₃²亚段为一套扇三角洲沉积体,主要发育扇三角洲前缘亚相,广泛发育的水下分流河道和河口坝砂体为油气的聚集提供了有利场所。分析低渗透储层成岩作用对储集物性的影响,得出造成本区储层砂岩渗透率较低的主要机制是成岩期强烈的压实作用及各种自生矿物的充填和胶结作用。结合成岩作用和微观孔隙结构研究,将本区成岩储集相划分为稳定组分溶解次生孔隙成岩储集相、中强压实强胶结残余粒间孔成岩储集相、强压实强胶结剩余粒间孔成岩储集相、极强压实强胶结致密成岩储集相4类,阐述了各类成岩储集相的特征。选用流动层带指标、孔隙度、渗透率、粒度中值、泥质含量、排驱压力、孔喉半径均值和变异系数等参数,采用神经网络模式识别方法,对目的层进行了成岩储集相识别,并结合沉积相,实现了成岩储集相的时空展布。     

藏北羌塘盆地中上侏罗统碎屑岩储层成岩演化特征

运用分析化验、储层测试等多种资料,对羌塘盆地中上侏罗统碎屑岩储层的成岩演化特征进行了研究。将中上侏罗统地层划分为晚成岩期A亚期、B亚期和C亚期3个岩阶段,识别出压实作用、压溶作用、胶结作用、交代作用、次生溶蚀作用、重结晶作用、沥青充填作用和破裂作用等7种成岩作用,以及机械压实成岩相、碳酸盐胶结成岩相、强压实压溶丰岩相、不稳定组分溶解溶蚀成岩相和沥青充填成岩相等5种成岩相类型。探讨了各种成岩相的岩性、物性等微观特征及其与沉积相类型之间的关系,总结出3种成岩演化序列。分析结果表明,不同成岩作用类型对储层物性的影响不同,次生溶蚀作用、破裂作用使物性变好;压实用作、压溶作用和沥青充填作用使性变差;胶结作用具有双重影响。     

藏北羌塘盆地中上侏罗统碎屑岩储层成岩演化特征

运用分析化验、储层测试等多种资料 ,对羌塘盆地中上侏罗统碎屑岩储层的成岩演化特征进行了研究。将中上侏罗统地层划分为晚成岩期A亚期、B亚期和C亚期 3个成岩阶段 ,识别出压实作用、压溶作用、胶结作用、交代作用、次生溶蚀作用、重结晶作用、沥青充填作用和破裂作用等 7种成岩作用 ,以及机械压实成岩相、碳酸盐胶结成岩相、强压实压溶成岩相、不稳定组分溶解溶蚀成岩相和沥青充填成岩相等 5种成岩相类型。探讨了各种成岩相的岩性、物性等微观特征及其与沉积相类型之间的关系 ,总结出 3种成岩演化序列。分析结果表明 ,不同成岩作用类型对储层物性的影响不同 ,次生溶蚀作用、破裂作用使物性变好 ;压实作用、压溶作用和沥青充填作用使物性变差 ;胶结作用具有双重影响     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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     

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