低阻油层成因与测井解释

低阻油层的定义和判断标准不是绝对的,其成因也是多种多样的,这就导致低阻油层的识别较为困难,笔者详细的叙述了低阻油层的成因,以及相应的测井解释,对研究低阻油层有较大帮助。     

松辽盆地某油田低阻油层成因探讨

松辽盆地某油田开发距今已近60年,随着油田注水开发的深入,开发初期的主力高阻厚油层含水量上升,平均含水达到95%以上,含油量逐年递减,给油田提供产量造成困难。因此开发低阻层成为油田增油挖潜的主攻方向。但是低阻油层由于成因复杂、地质状况多样、识别困难等原因,为开发低阻油层带来较大困难。近年来,各油田都对低阻油层的科研攻关投入巨大人力物力,也取得了一定的科研成果。本文重点对松辽盆地目的区块低阻油层的成因进行探讨,从而为后期的低阻油层识别和开发提供参考。     

低阻油层的测井识别技术及成因分析

从矿化度、构造特征、束缚水等9个方面讨论了低阻油层的成因,并提出测井识别低阻油层的方法,同时提倡测井与地质、录井、油藏工程相结合,相互补充以提高低阻油层的识别率。     

低阻油藏成因分析及核磁共振技术在其上的运用

文章对我国油田的现状进行了分析,分析中得出了非常规油气对各个油田后期稳产非常重要。现在,低阻油层是各个油田研究的一个重要方面,对于稳产和提高开发成本都有效果。本文主要对各种成因的低阻油层成因机理进行了探讨,并得出了一般低阻油层在常规测井资料上的响应和特征。最后,阐述了核磁共振技术应用于低阻油藏。     

雁木西油田低阻油层形成机理分析及油水层判别

随着科学技术的不断进步,对低阻油层认识的不断深化,在实际勘探开发过程中,低阻油层储量和产量都在不断的增加。雁木西油田受高矿化度地层水、岩性、地层磁铁矿导电性、储层物性等因素影响,对低阻油层的识别带来很大的难度。本文从低阻油层成因方面对雁木西油田油层的形成机理进行研究,以测井资料为基础,结合试油、试采资料进行综合识别,建立了低阻油水层识别模板,有效指导了油田低阻油层的评价和开发生产。     

珠江口盆地东部低阻油层成因研究及预测

珠江口盆地东部低阻成因已进行多次研究,认为主要成因是由于泥质含量高、岩性颗粒细导致束缚水饱和度高形成导电网络而引起,但始终没说明何种成因是主控因素。目前国内对低阻成因的微观机理研究已经比较多,但是对宏观地质规律研究较少。本文从珠江口盆地发现的两种类型的低阻油层出发,从区域盖层的角度分析了低阻形成的主要成因,认为区域盖层的变化是低阻油气藏形成的主控因素,并据此分析对低阻油层可能出现的区域做出钻前预测。     

胡状集油田胡5断块区油藏低阻油层成因分析

国内近年来不少油田都有低电阻率油藏的发现和研究,东濮凹陷也有不少地区发现了低电阻率油层,东濮凹陷西斜坡胡状集地区也存在低阻油层形成的条件。近年来在老区增储挖潜过程中加强对低阻油层形成条件的认识和研究,发现了一批低阻油层,深化了对低阻油层形成条件的认识,提高了低阻油层解释的成功率。本文以胡5块为例从地质特征和储层性质方面对低阻油层的成因进行了分析,认为该块地层平缓、泥质含量重、束缚水含量高、岩石亲水是产生低电阻率油层的主要因素。     

油田低电阻率成因机理分析

低阻油层,即油层的电阻增大率小于2,近年来,低阻油层作为老油田挖潜和新增储量的目标之一倍受人们的关注。本文以敖21区块为例,从地层水高矿化度、高束缚水、泥质附加导电性三个个方面阐述了低阻油层的成因机理,这些方法在敖21区块葡萄花层的低阻油层的识别和评价中均取得了良好效果。     

温米油田低阻油层成因分析及综合评价

低阻油层测井曲线特征与水层相似,解释难度大,文章以温米油田为依托,从低阻油层四性关系入手,综合地质与测井等多种资料,深入分析低阻油层成因,对下一步充分进行层内剩余油挖潜,提高采收率起到积极作用。     

阿尔及利亚X区块低阻油层成因分析及饱和度评价

阿尔及利亚X区块三叠系的主要目的层段是TAGI组,它属于典型的低幅圈闭油气藏,其储层类型为河流相的砂岩储层。在新完钻的两口井中均钻遇了低阻油层,其成因十分复杂,油水识别比较困难。本文基于低阻油层的测井曲线响应特征,深入分析了该区低阻油层的成因,主要为高地层水矿化度、双重孔隙系统并存、泥质含量重及砂泥岩薄互层的影响。在此基础之上,建立了基于岩心分析、成像测井和电缆测压资料的低阻油层饱和度的计算模型,能准确计算研究靶区低阻油层的饱和度,为海外油气储量的准确评估奠定了坚实的基础。     

北部湾盆地涠西南凹陷WZ10-8-1井流沙港组三段勘探实践分析

基于WZ10-8-1井钻探实践所获得资料,结合沉积相分析,断层两侧砂岩配置关系、泥岩涂抹因子、最大主地应力方向与断层走向的关系,并参考已钻经测试证实为油层的低阻油层井,分析认为WZ10-8-1流三段储层具备了成藏条件。由于该构造属于勘探初期且为海水泥浆钻进,对低阻油藏的认识不足,可能漏失了油层,该井流三段测井解释的水层可能为低阻油层。结合低阻油层特征对WZ10-8-1井流三段成藏条件进行深入分析,进一步获得解释低阻油层的认识,将对以后类似所钻探井成藏分析及测井解释具有很好借鉴作用。     

Novel seed-assisted synthesis of indium tin oxide submicro-cubes and their resistivity

Indium tin oxide films, an important n-type semiconductor oxide, show great prospects in optoelectronic device applications. Consequently, as a key raw material of targets for sputtering films, it is important to prepare low-resistivity indium tin oxide powders. Herein, low-resistivity indium tin oxide submicro-cubes are synthesized by a seed-assisted coprecipitation method. The effects of seed content, In³⁺ concentration, aging time, reaction temperature and calcination temperature on resistivity were investigated by single factor and orthogonal experiments. To ensure reliability and reproducibility of data, each experiment was repeated three times and resistivity of each sample was measured three times to obtain average value. The results indicated that optimal sample was matched with cubic phase In₂O₃. The single-crystal indium tin oxide particles exhibited a regular cubic shape with a size of nearly 500 nm and low resistivity of 0.814 Ω·cm. Compared with particles prepared by the conventional coprecipitation method, indium tin oxide submicro-cubes showed good dispersion. The presence of seed particles provided nucleation sites with lower energy barriers and promoted formation of submicro-cubes. The face-to-face contact among particles and good dispersion contributed to electron transfer, resulting in lower resistivity. The seed-assisted synthesis provides a novel way to prepare low-resistivity indium tin oxide submicro-cubes.     

彩南油田低阻油气层测井沉积模式及其成因分析

在彩南油田低阻油气层定义为电阻增大率(油层电阻率与水层电阻率之比)小于2的油气层,其油水层的测井信息差异小,含油饱和度小于50%,试油时却产纯油气,投产后含水上升速度很快,且该区具有高阻水层和低阻油层同时存在的现象。根据该区低阻油气层测井曲线响应特征,可以总结出低能相带、正韵律、反韵律、齿状低幅四种测井沉积模式。其成因是由于岩石不动水饱和度高、地层水矿化度高、盐水泥浆侵入影响大、构造幅度低、油层厚度薄、原油密度和粘度较小和油水关系复杂,其核心机理为岩石颗粒表面的水膜厚,油层厚度薄,油水分异作用差或无分异造成油气层电阻率降低。     

两层介质中的感应测井响应特性分析

在地球物理勘探方法中,感应测井是重要的地层电阻率测量方法。它的目的是测量裸眼井中不同深度井壁周围地层的电导率。本文主要通过数值计算分析低阻围岩和高阻围岩对视电导率的影响。     

镇北油田长3低阻油层成因分析及识别方法研究

以正确识别镇北油田长3低阻油层为目的,从五个方面分析了低阻油层的成因机理:地层水矿化度高、储层岩性特征、钻井液侵入、泥质含量、含油饱和度.另外提出了适合本油田低阻油层识别方法,即地质录井识别、测井资料识别及地质综合分析方法识别,并且在现场应用中取得了较好的效果.     

吉林红岗油田低阻油层成因机理研究

低阻油气藏在全国各大油田都有发现,如渤海湾地区、南海莺歌海盆地、塔里木塔北地区等,形成低电阻率油层的机理不尽相同,但低电阻率产生的根本原因一般是束缚水含量高、粘土矿物的附加导电能力相对较强、存在导电矿物、油藏幅度低等。为了正确识别低阻油层,评价油藏条件下的饱和度,必须搞清低阻油层的低阻特性和形成机理。本文从可能引起低阻的各方面原因对吉林红岗油田泉四段低阻油层的成因机理进行了研究。     

Effects of the Sintering Temperature on the Oxygen Adsorption in ZnO Ceramics

Changes in electrical resistivity due to oxygen adsorption for samples prepared at different sintering temperature are presented. It was found that samples cooled in steps from the sintering temperature show a higher resistivity and that oxygen indiffusion is faster in quenched samples and in samples sintered at low temperatures. Two mechanisms were determined to be responsible for an increase in the sample resistivity. First, oxygen adsorption at grains surfaces produces a rapid increase in resistivity and then a slow change in the response due to oxygen diffusion into the grains.     

复杂孔隙结构低阻成因及测井评价方法研究

大庆八厂葡萄花油层广泛发育低阻油气藏,复杂孔隙结构是低阻油藏形成的主要原因之一。通过研究区低阻油层的岩石孔隙结构特征研究,结合试油资料,验证了本区复杂孔隙结构是造成低阻油层发育的主要原因之一。通过分析化验资料,利用研究区孔隙结构参数建立了储层分类标准,指出了低阻油层发育的储层类型;利用压汞和常规孔渗资料,建立了孔隙结构参数和储层品质指数的关系模型,形成了利用测井资料评价孔隙结构的方法和模型,为低阻油层有利区预测提供了技术保证。研究表明:该技术对于解决低阻油层的识别和评价具有重要的应用价值。     

Effects of anode-cathode distance on the cell potential and electrical bath resistivity in an aluminium electrolysis cell with a sloping TiB2 composite cathode

A study of the effects of anode-cathode distance (ACD) on the cell potential and electrical bath resistivity in a laboratory scale cell that utilizes a sloping TiB₂ composite cathode shows an increasing bath resistivity as the ACD decreases, due to a simultaneously increasing gaseous phase fraction in the electrolyte. The effective bath resistivity was found to increase rapidly after ACD=10 mm and was proportional to the inverse of ACD within this low ACD range studied (2–10 mm). Addition of NaCl to the electrolyte (5.5 wt%) lowered the electrical resistivity by increasing the conductivity of the electrolyte, and at low ACD it also lowered the bubble contribution to the bath resistivity, most likely due to changes in the hydrodynamic properties of the system. Lowering the cryolite ratio (i.e. molar ratio of NaF to AlF₃) resulted in a higher electrical resistivity in the electrolyte by decreasing the conductivity of the melt, as well as by changing the hydrodynamic properties of the melt, leading to an increased bubble contribution to bath resistivity at low ACD. An increase in temperature resulted in a reduced bubble contribution at low ACD in a similar manner as the NaCl addition. From these results, it is clear that for a commericial process, reduction of the ACD and optimization of process conditions to reduce the effect of bubbles should allow significant savings in the energy requirements of the Hall-Heroult process.     

胡状集油田低阻油层的形成机理研究

低阻油层作为一个新的研究领域,在石油勘探寻找新的油气藏或在油田开发中后期寻找剩余油的潜力层分布中,占有十分重要的作用。本文通过分析低阻油层形成的主要因素及其形成机理,指出胡状集油田低阻油层形成主要受控于形成油气藏的内外因素。