Complex genesis of multiperiod fractures in the Middle Triassic Leikoupo Formation in the Pengzhou gas field, western Sichuan Basin, China

The cumulative expression of multistage deformation is complex multiperiod fractures,which are commonly seen in tectonic zones.The Middle Triassic Leikoupo Formation in the western Sichuan Basin Depression,China,is a typical marine carbonate reservoir with natural fractures caused mainly by tectonic movements.According to outcrops,drill cores,image logging,and fluid inclusions,the fracture characteristics,types of natural fractures,and interactions of fractures are determined.In total,419 natural fractures in 493.2 m of cores from 7 wells are investigated,which are mainly shear and tensile fractures with a small number of weathering generated fractures.Meanwhile,the results of the stable isotope analysis of δ13C and δ18O,as well as the flow fluid inclusion data,reveal four tectonic periods of fractures with different occurrences.Based on the history of regional tectonic evolution,indicating one period of weathering fractures ascribable to stratal uplift and three periods of structural fractures related to the sequential tectonic movements of the Longmenshan fault belt.By analyzing the interaction relationships of fractures,three types of fracture interaction relationships are observed:cutting,restraining,and overlapping.The four stages fractures are chronologically assigned to(1)the early Indosinian N-S trending compression,(2)the late Indosinian NW-SE compression,(3)the middle Yanshanian NE-SE compression,and(4)the early Himalayan E-W compression.The influence of natural fractures on gas migration and well production in marine carbonates is discussed,and indicates that tectonic fractures could provide seepage channels for gas migration and accumulation from near or distant hydrocarbon source rocks into the Middle Triassic Leikoupo Formation.This study utilizes a pragmatic approach for understanding the fracture genesis mechanism in oil and gas field with multiperiod fractures.

Characterization and formation mechanisms of fractures and their significance to hydrocarbon accumulation: A case study of Lower Ordovician mid-assemblage Formations in central Ordos Basin, China

The lower Ordovician mid-assemblage Formations in the central Ordos Basin of China host prolific gas resources,and most hydrocarbon reserves are stored in naturally-fractured reservoirs.Thus,fracture pathway systems may have a significant impact on reservoir performance.This article focuses on the core-and laboratory-based characterization of fractures.Through the developmental degrees,extended scale,output state and filling characteristics of various types of fractures,the results show that there are three distinct fracture types:1)nearly vertical fractures,2)oblique fractures,and 3)horizontal fractures.Based on a systematic study of the characterization of reservoir space,the main geologic setting of natural gas accumulation and the regional tectonic background,type 1 is mainly driven by the tectonic formation mechanism,and type 3 and parts of low-angle fractures in type 2 are induced by the diagenetic formation mechanism.While recovered paleopressure for methane-rich aqueous inclusions trapped in fracture-filling cement indicates that the fracture opening and growth are consistent with gas maturation and charge and such high-angle fractures in type 2 are caused by the compound formation mechanism.The fractures to hydrocarbon accumulation may play a more significant role in improving the quality of reservoir porosity.Furthermore,connected fractures,dissolved pores and cavities together constitute the three-dimensional pore-cave-fracture network pathway systems,with faults serving as the dominant charge pathways of highly pressurized gas in the study area.Our results demonstrate that protracted growth of a pervasive fracture system is not only the consequence of various formation mechanisms but also intrinsic to quasi-continuous accumulation reservoirs.

Plugging performance and mechanism of an oil-absorbing gel for lost circulation control while drilling in fractured formations

Lost circulation of drilling fluid is one of the most common engineering problems in the drilling process of fractured formations.In this study,an oil-absorbing polymer gel synthesized using compound monomers with rigid and flexible chains was applied to control the oil-based drilling fluid loss while drilling.The microstructure,oil-absorbing performance,and plugging performance the gel was investigated.A large number of dense pores on the surface of the gel were observed,which allowed the oil molecules to enter the internal space of the gel.The initial oil absorption capacity of the gel was fast,and it increased with the increase in the temperature and decrease in the particle size,reaching 20.93 g/g at140℃.At a high temperature of 140℃,the bearing pressure capacity of the gel formula containing particles of different particle sizes reached 7.6 MPa for a fracture of a width of 3 mm,showing that the oil-absorbing gel have excellent plugging performance at high temperature.Plugging mechanism of the gel was investigated through visualized fracture plugging experiments.Results show that the dynamic migratio n,particle-swelling,particle-bridging,particle-aggregation,deformation-filling,and compaction-plugging contribute to the whole lost circulation control process,reflecting that the plugging performance can be effectively enhanced by improving the aggregation and filling degrees of the gel with different particle sizes.

Formation mechanisms of fracture plugging zone and optimization of plugging particles

As formation mechanisms of plugging zone and criteria for fracture plugging remain unclear,plugging experiments and methods testing granular material mechanical properties are used to study the formation process of the plugging zone in fractured formations,analyze composition and ratios of different sizes of particles in the plugging zone,and reveal the essence and driving energy of the formation and damage of the plugging zone.New criteria for selecting lost circulation materials are proposed.The research results show that the formation of the plugging zone has undergone a process from inertial flow,elastic flow,to quasi-static flow.The plugging zone is composed of fracture mouth plugging particles,bridging particles and filling particles,and the proportion of the three types of particles is an important basis for designing drilling fluid loss control formula.The essence of the construction of the plugging zone is non-equilibrium Jamming phase transition.The response of the plugging zone particle system to pressure is driven by entropy force;the greater the entropy,the more stable the plugging zone.Lost circulation control formula optimized according to the new criteria has better plugging effect than the formula made according to conventional plugging rules and effectively improves the pressure-bearing capacity of the plugging zone.The research results provide a theoretical and technical basis for the lost circulation control of fractured formations.

Deep-seated rock fracture of valley slopes in China:A review

Deep-seated rock fractures(referred to as DSRF hereafter)in valley slopes are uncommon geological phenomena that challenge our previous understanding of slope unloading processes.These fractures weaken the strength and integrity of the rock mass,potentially forming unstable block boundaries with significant volume,thereby affecting the stability of slopes,chambers,and dam abutments.DSRF has emerged as a critical environmental and engineering geological issue that hinders large-scale projects in deep canyon areas.Despite the attention and practical treatment given to DSRF in engineering practice,theoretical research on this topic still lags behind the demands of engineering applications.To garner widespread attention and promote the resolution of DSRF-related problems,this review aims to redefine DSRF through comprehensive data collection and analysis,engineering geological analogies,and field investigations,and provide a summary and analysis of the research progress on DSRF,along with future research directions.The study defines DSRF as the intermittent tension cracks or relaxation zones within a slightly weathered or fresh,and intact or relatively intact rock mass distributed below the surface unloading zones of a deep canyon slope,and should be distinguished from"loose rock mass"and"deep-seated gravitational slope deformations".The article provides an overview of the development and distribution,rupture characteristics,and genesis mechanism of DSRF.It proposes that DSRF is formed based on the fluvial deviation-undercutting evolution mode,wherein the energy accumulated in the rock mass is violently released when the river further down cuts the slope after the rock mass has undergone cyclical loadingunloading.However,further research is necessary to establish a comprehensive database for DSRF,refine exploration techniques,understand evolutionary processes,develop engineering evaluation methods,and predict the distribution of DSRF.

四川盆地涪陵南地区奥陶系五峰组—志留系龙马溪组页岩古构造应力场及裂缝特征

通过岩石力学实验、声发射实验和地震资料综合解释,利用有限元数值模拟方法,对涪陵南地区奥陶系五峰组—志留系龙马溪组海相页岩古构造应力场进行了数值模拟,并结合岩心实测结果,预测了构造裂缝的发育特征。研究结果表明:①涪陵南地区裂缝主要形成期(燕山晚期)构造应力和裂缝的分布受断层、岩石力学性质和构造应力的影响,断层广泛发育的区域容易出现应力集中,并引起较大的应力梯度。②利用库伦-莫尔破裂准则预测了研究区构造裂缝的发育,同时引入剪切破裂指数R定量表征裂缝发育的强度,其值越大反映裂缝发育程度越高。窄陡断背斜和断层附近裂缝发育,以高角度剪切裂缝为主,而在宽缓向斜部位裂缝发育程度最弱,研究区五峰组—龙马溪组底部硅质页岩应力集中,裂缝最发育。③涪陵南地区海相页岩气保存有利区主要为3个区带:远离大断层的凤来向斜内部,主要构造变形期未遭受大的破坏作用,其位于应力低值区,具有良好的保存条件,为Ⅰ类有利区;白马向斜内部小断层发育,应力值位于中等水平,保存条件中等,为Ⅱ类较有利区;石门—金坪断背斜遭受到强烈改造作用,容易产生大规模剪切裂缝,破坏了保存条件,为Ⅲ类不利区。

济阳陆相断陷盆地页岩油研究进展

济阳陆相断陷盆地页岩油是现实的资源接替新领域,具有巨大勘探潜力,是胜利油田可持续发展的重要资源基础。结合近年来济阳陆相断陷盆地页岩油地质研究与勘探成效,系统梳理了济阳陆相断陷盆地页岩沉积、成储、成烃及页岩油富集理论认识、配套增产压裂技术等方面的新进展。研究表明:①提出了基于矿物组成、沉积构造、结晶程度和有机质丰度的“四要素三端元”页岩岩相划分方案,揭示了“四古控相”机制,明确了页岩岩相呈“环带状”有序分布。②集成岩心微纳米CT扫描、氩离子抛光扫描电镜、FIB-FESEM、核磁共振冻融、X射线小角散射等页岩多尺度孔缝系统量化表征技术,明确了济阳陆相断陷盆地页岩储集空间孔缝兼顾,以无机孔缝为主,揭示了方解石重结晶、溶蚀作用和伊/蒙混层向伊利石转化作用是最为主要的成储机制,构建了页岩孔缝网络储集模型。③研发了富有机质页岩含油率评价方法,揭示了咸化湖盆富有机质页岩古生产力高、早生、早富特点,初步估算济阳陆相断陷盆地页岩油资源量超过1010t。④纹层/层状页岩岩相成烃、成储时空耦合控制了页岩油富集,表现为“咸化源岩早生、无机孔缝储集、微观源储一体、二元耦合富集”模式。⑤创建了陆相断陷盆地页岩油勘探“四性”“四定”综合评价体系及目标优选流程。⑥研发了适合济阳陆相断陷盆地页岩的“组合缝网压裂”“水平井多级分段”增产压裂技术。结合胜利油田实际情况,确立了“主力洼陷增储上产、富油小洼陷探索新阵地、外围小洼陷落实资源、兼顾优化矿权”的勘探思路,有序推进济阳陆相断陷盆地页岩油规模增储建产,相关成果认识与配套技术对同类油田的页岩油勘探开发具有一定的借鉴和参考意义。

巨厚覆岩矿震孕育破裂特征与应力触发机制

【目的】深部开采巨厚覆岩破断导致引起地表震感的矿震频发,已成为制约矿区高效生产的最严峻难题,亟待改变矿区巨厚覆岩矿震频度高、防控难现状。【方法】以内蒙古自治区鄂尔多斯呼吉尔特矿区某邻空综采工作面频发巨厚覆岩矿震为研究对象,应用厚板理论分析巨厚覆岩结构破断演化规律,提取矿震波形主成分并采用矩张量反演方法定量研究矿震震源破裂机制,基于张拉、压缩及混合破裂震源主应力作用方式修正应力反演模型,改进应力反演算法,分析矿震震源孕育破裂特征及应力场演化规律,定量解析矿震应力触发机制。【结果和结论】结果表明,巨厚覆岩破断运移为矿震孕育触发的动力、能量源;主成分分析方法可快速提取因采矿环境干扰波形的主成分,为矩张量求解提供优质反演数据;修正后应力反演算法能够满足采动诱发非剪切破裂震源应力反演需求,实现对典型张拉、压缩等非剪切破裂矿震震源应力场反演;工作面邻空回采期间,顶板逐层向上与侧向采空区联动破断,采空区影响使得孕震期间顶板活动性增强,巨厚覆岩断裂特征整体呈显著张拉状态;矿震孕育过程中主应力作用方位基本一致,应力形因子分别为0.66、0.71和0.30,覆岩应力分布由单轴挤压转变为挤压张拉状态,最大主应力单轴挤压作用导致巨厚覆岩瞬时断裂释放大量弹性能是诱发“2·6”和“10·30”矿震的主要原因,工作面邻更大范围采空区开采,最大、最小主应力挤压张拉协同作用将可能诱发更大能级矿震。研究结论可为矿区及周边因矿震问题限制高效生产的矿井从源头调控降载减震提供理论支撑。

大豆肽不溶性聚集体形成机制及应用研究进展

大豆肽是一种具有多种功能特性的酶解产物,因其具有抗氧化、降血压等特性在食品领域中应用广泛。蛋白质酶解过程中产生的不溶性聚集体含有人体必需的多种氨基酸,是一种优质的蛋白质资源。但其产生会降低蛋白质水解效率,丢弃则造成资源浪费和环境污染。目前这种不溶性聚集体的成因及有效利用引起了学界的广泛关注。文章综述了大豆肽不溶性聚集体的形成机制、影响因素、功能特性及在食品领域中的应用,为肽不溶性聚集体的深入研究及在食品领域中的应用拓展提供了理论基础。

运动训练促进骨健康的研究进展

机械负荷导致适应性骨形成。这种现象涉及骨靶向重塑和适应性骨形成。骨重建对于修复机械负荷过程中产生的疲劳损伤是必要的,而适应性骨形成是提高骨刚度和强度的有效机制。因此,可以调节机械负荷的变化,从而最大程度上促进适应性骨形成。不习惯、动态、高冲击、多向、间歇性的运动,包括延长休息时间以恢复骨骼机械敏感性,是最容易促进适应性骨形成的因素。适应性骨形成可能有助于帮助运动人群预防应力性骨折。另外,充足的睡眠、补充维生素D和钙、高能量供应,可以最优化适应性骨形成。

非常规沉积储层层理缝研究进展及趋势

【意义】沉积储层中普遍发育的层理缝是提高岩石整体渗透率、促进流体流动的关键,对非常规油气勘探开发的意义日益突显。【进展】国内外学者关于层理缝的特征及其与油气运移聚集的关系、识别与预测、成因机制和影响因素等方面进行了广泛的探究。研究结果表明:(1)层理缝具有高线密度、高水平渗透率特征,层理缝是否存在是影响非常规沉积储层油气大规模聚集的基本条件之一;(2)地震反演法、成像测井和常规测井识别法,以及裂缝相关主控因素预测法、地质参数建模及数值模拟预测法是目前识别与预测裂缝常用的方法,但仍存在精确度低、成本高、方法不成熟的局限性;扫描电镜、全自动矿物定量分析、纳米及微米CT扫描和数字岩心等技术的应用使层理缝的研究逐渐进入微观化、可视化和定量化水平;(3)层理缝的形成是沉积成岩、构造、超压和结晶应力等多种复杂因素共同作用的结果;(4)沉积岩和层理类型、岩石的矿物组成和TOC含量等是影响层理缝发育的主要内因;断层和褶皱发育程度、到断层核和褶皱轴的距离、地层埋深和抬升剥蚀强度等,是影响层理缝发育的主要外因。【结论与展望】目前对于不同类型沉积岩和层理形成层理缝的综合机制、不同类型层理缝的精细识别和量化预测模型的建立、层理缝与油气“运移”或“聚集”具体关系的确定等,尚缺乏全面、系统及定量化的研究。这些问题在一定程度上限制了裂缝型油气储层的勘探和开发进展,也是未来层理缝的重要研究方向。

孔喉结构对超深层碳酸盐岩气藏多类型储层渗流能力的影响

超深层碳酸盐岩气藏孔喉结构非均质性强,渗流机制复杂。选取川西北地区双鱼石区块栖霞组储层岩心,通过多尺度CT试验、核磁共振试验和储层条件下的单相渗流、气水两相渗流及应力敏感试验等,系统定量地研究超深层多类型储层孔喉结构特征参数与渗流特征参数的相关性,深入剖析裂缝、大孔和基质孔隙对超深层多类型气藏气体单相和气水两相渗流的影响。结果表明:不同于中深层储层,增加喉道数量对于提高目的超深层储层的渗流能力非常关键;裂缝发育增加了岩样喉道数量、提高了岩样的连通性从而来大幅度提高岩样的气体渗流能力,并降低了含水气藏的启动压力梯度,缩小了岩样的气水两相共渗区间,但裂缝受压易形变的特质导致岩样的应力敏感性增强,在高压差时岩样的渗流能力和弹性能也急速下降;大孔喉发育提高了储层的储容能力,其抵抗变形能力强的特质有利于降低岩样的应力敏感性,在高压差时维持岩样较高的渗流能力和弹性能。在实际生产过程中,应考虑对裂缝-孔隙型和裂缝-孔洞型储层在生产初期控制产气速度以维持长期稳产,对孔洞型和孔隙型储层增大生产压差或进行压裂和酸化等工艺措施以释放储层产能。

四川盆地典型“西南型”盆地涡特征研究

盆地涡是西南涡的一种类型,是指在700 hPa等压面上生成于四川盆地,连续有两次闭合等高线的低压或3个站风向为气旋性环流的低涡。它是造成四川盆地降水的主要系统,而“西南型”盆地涡是盆地涡中发生频率最高、强度较强的一类。本文利用ERA5(0.25°×0.25°)逐小时再分析资料、GPM卫星降水资料以及《西南低涡年鉴》等,探讨了2020年6月26-28日发生于四川盆地的一次典型“西南型”盆地涡的特征和发生发展机制。结果表明:此次盆地涡生成于四川盆地西南部,随后向东北方向移动,到达四川东北部后转向东行,进入重庆后消亡,生命史共计48 h。该盆地涡的形成发展与其位于200 hPa南亚高压东北侧及高空急流入口区右侧的辐散区,以及500 hPa短波槽前正涡度平流造成低层减压密切相关。700 hPa上四川盆地西南部位于低空急流的左前方,有利于辐合上升运动的发展和低涡形成。700 hPa盆地涡东北方向的锋生大值区、低空急流的加强北上以及500 hPa高空槽前西南气流的引导作用,是低涡向东北方向移动的主要因素。随着200 hPa南亚高压中心东移到江淮上空以及高空急流减弱,500 hPa短波槽随之东移,盆地涡位于槽后的负涡度平流区,垂直方向转为下沉运动,地面加压,低涡逐渐减弱消亡。对涡度收支方程各项分析发现,低空辐合是盆地涡强度增加的主要贡献项,由低空辐合导致盆地涡正涡度的增加几乎贯穿了低涡整个生成发展阶段。此外高空正位涡大值区的存在、盆地涡降水的凝结潜热释放等,也对本次盆地涡的发展和移动起到了重要作用。

X区块须家河组致密砂岩岩石力学特性与裂缝扩展特征

须家河组是四川盆地致密砂岩气勘探开发的重要领域,储层岩石力学、断裂力学特性以及裂缝扩展特征尚缺乏研究。本文采用热-固耦合三轴压缩实验和断裂韧性评价实验,获取致密砂岩的岩石力学性质参数和断裂韧性,分别计算储层岩石的弹性力学脆性指数和利用断裂韧性计算的脆性指数,对储层脆性进行评价;采用真三轴高温高压物理模拟实验系统,在60℃条件下,开展不同水平应力差、压裂液黏度、注入排量的裂缝扩展物理模拟实验,分析裂缝扩展规律。结果表明,须家河组致密砂岩储层岩石的弹性力学脆性指数为34.1~62.9,平均值42.99,断裂韧性计算脆性指数为7.68~9.39 m^(-1/2),平均值为8.54 m^(-1/2),为脆性储层;压裂液黏度越大,裂缝偏转角越大,岩样内裂缝贯穿深度越大;在压裂施工过程中,可根据条件适当提高泵注排量和压裂液黏度,来提高储层体积压裂形成复杂缝网的可能性;多簇压裂裂缝存在竞争扩展现象,射孔簇间距越小,缝间干扰越严重;增大泵注排量并结合暂堵技术,可促进多裂缝均衡扩展。研究成果可为须家河组致密砂岩压裂改造提供一定的理论支撑。

Ni基GH3617高温合金的拉伸行为研究

通过无硼高温合金GH3617室温下的拉伸试验,考察其基础力学性能及变形行为。研究结果表明:固溶热处理(1 175℃/1 h/WC)后合金组织主要由奥氏体等轴晶组成,且存在大量的退火孪晶;室温下合金的变形方式主要是位错的平面滑移和孪生,表现出优越的加工硬化能力和较佳的强塑性匹配,屈服强度为309.7 MPa、抗拉强度为762.3 MPa、延伸率为70.13%;拉伸过程中,裂纹优先在晶界和孤立的碳化物处形核,断裂方式为沿晶-穿晶混合型断裂,裂纹扩展过程中其尖端形成的二次裂纹可释放尖端应力,提高材料塑性。

修辞构式“X刺客”的形成机制探析

本文从“刺客”和“杀手”的构词理据入手,厘清了“X刺客”得名之由,对“X刺客”进行了构式认定和构件分析,比较了“刺客”和“杀手”的语义特征差异对“X刺客”形成的作用。本文认为“X刺客”构式的衍生机制主要有四种:隐喻、构式压制、类推作用和反预期。与其他同类构式相较,反预期机制对这一构式形成具有独特价值。另外,本文认为“X刺客”正处于语法构式和修辞构式并用阶段,且最终会发展为语法构式。

基于裂缝形成机理分析的潜山裂缝地震预测技术

太古界深层变质岩潜山气藏由于埋深大、地震成像难度高、资料分辨率低等因素导致利用宽方位地震数据进行精细高角度小尺度裂缝预测难度极大;裂缝发育期次多、走向倾角复杂多变进一步加剧了利用地震振幅反演裂缝信息的难度。针对以上难题,从变质岩基质裂缝形成机理分析入手,评估利用地震资料预测变质岩裂缝形成能力的可行性,在裂缝形成能力评估基础上利用方位各向异性信息进行裂缝密度预测。提出一种地球物理适用的变质岩基质潜山裂缝形成能力评估模型,创新地联合利用临界应变能释放率和脆性指数评估变质岩基质潜山裂缝形成能力,通过岩相定义、地震反演和统计分类实现裂缝形成能力定量地震解释。同时基于Chapman模型的横向各向同性(Horizontal Transverse Isotropy,HTI)岩石物理模拟技术构建不同裂缝形成能力岩相的裂缝密度与方位各向异性强度拟合关系,据此在裂缝形成能力解释基础上进行裂缝密度分岩相精确预测。以上基于裂缝形成机理分析的潜山裂缝地震预测技术成功应用于潜山B构造,研究成果可为相似变质岩基质潜山裂缝地震预测提供参考。

言卑趣则有——论袁宏道诗文中的诙谐色彩

晚明文人袁宏道诗文兼擅,他作品中显露出的诙谐色彩成为其风格特色之一。这种诙谐色彩具有谐谑对象广、艺术形式多样、风格雅俗并存的特点。在诗文中,袁宏道通过制造意外感、优越感、宣泄感生成诙谐色彩。而之所以会产生出这种诙谐幽默的风格,原因可以从社会历史因素、经历与性格因素、文艺美学观三个方面进行探讨。

The mechanism of hydraulic fracturing assisted oil displacement to enhance oil recovery in low and medium permeability reservoirs

Aiming at the technology of hydraulic fracturing assisted oil displacement which combines hydraulic fracturing,seepage and oil displacement,an experimental system of energy storage and flowback in fracturing assisted oil displacement process has been developed and used to simulate the mechanism of percolation,energy storage,oil displacement and flowback of chemical agents in the whole process.The research shows that in hydraulic fracturing assisted oil displacement,the chemical agent could be directly pushed to the deeper area of the low and medium permeability reservoirs,avoiding the viscosity loss and adhesion retention of chemical agents near the pay zone;in addition,this technology could effectively enlarge the swept volume,improve the oil displacement efficiency,replenish formation energy,gather and exploit the scattered residual oil.For the reservoir with higher permeability,this measure takes effect fast,so to lower cost,and the high pressure hydraulic fracturing assisted oil displacement could be adopted directly.For the reservoir with lower permeability which is difficult to absorb water,hydraulic fracturing assisted oil displacement with surfactant should be adopted to reduce flow resistance of the reservoir and improve the water absorption capacity and development effect of the reservoir.The degree of formation energy deficit was the main factor affecting the effective swept range of chemical agents.Moreover,the larger the formation energy deficit was,the further the seepage distance of chemical agents was,accordingly,the larger the effective swept volume was,and the greater the increase of oil recovery was.Formation energy enhancement was the most important contribution to enhanced oil recovery(EOR),which was the key to EOR by the technology of hydraulic fracturing assisted oil displacement.

Influence of Electric Field on Mechanical Properties of Al-Li Alloy Containing Cerium and Electronic Mechanism

The effect of electric field on the mechanical properties and microstructure of AI-Li alloy containing Ce was investigated, and mechanism was discussed. The experimental results show that the ductility of the alloy is enhanced by the electric field. The fracture features are changed and the precipitates are dispersed under the effect of the electric field. The mechanism discussion reveals that the effects of the electric field on the alloy are due to the change of the electron density in the alloy.