微生物采油技术发展概述

经过70多年的发展,微生物采油技术(MEOR)已经成为继热力驱、化学驱、聚合物驱之后的第4种提高采收率的新的“三采”技术,并且越来越受到人们的重视。本文介绍了微生物采油技术的发展历史、微生物提高原油采收率的技术机理、微生物采油方法及其特点,以及微生物采油技术在我国的发展动态,最后提出微生物采油技术今后发展展望。     

微生物技术在石油开采中的应用

简要阐述了微生物采油技术的发展概况，论述了微生物在油层中的生物降解作用、驱油机理和现场施工方式，对微生物的生存环境和油藏的筛选条件进行了详细描述，并作了相应的物理模拟试验。试验结果表明微生物采油技术可以有效地提高采收率，具有起好的发展前景。     

微生物技术在石油开采中的应用

简要阐述了微生物采油技术的发展概况,论述了微生物在油层中的生物降解作用、驱油机理和现场施工方式,对微生物的生存环境和油藏的筛选条件进行了详细描述,并作了相应的物理模拟试验。试验结果表明微生物采油技术可以有效地提高采收率,具有良好的发展前景。     

靖安油田微生物吞吐采油试验研究

简要阐述微生物采油技术的发展、采油机理和施工方式。根据靖安油田的地质特点,进行生物茵的优选与现场吞吐试验,结果表明：对于靖安油田的低渗、裂缝砂岩油藏,微生物采油技术是有效的,提高了采收率,具有良好的发展前景。     

利用二氧化碳提高原油采收率研究进展

CO2驱油能提高采收率,目前已成为世界三大采油方法（热采、聚合物驱和CO2驱）之一。本文分析了CO2采油的机理、CO2采油的开发方式,并结合CO2采油目前存在的问题,提出了今后的发展趋势。     

中深层稠油油藏蒸汽驱采油技术研究

辽河油田稠油油藏蒸汽吞吐开采大多进入中后期,开采成本高,效果差,蒸汽驱可作为吞吐后期有效的驱替方式.从油藏工程研究的角度,论述了蒸汽驱试验方案设计、先导试验注采特征,并通过实例对中深层稠油油藏蒸汽驱的开采进行分析,结果表明:蒸汽驱作为蒸汽吞吐后提高采收率的一种有效的采油技术,可用于中深层稠油油藏的开采.     

低渗透油藏注CO2驱提高采收率预测方法

CO2驱油技术在低渗透油田中的研究已经越来越深入,无论室内实验还是现场试验证明都是可行的,不论是在高含水油藏还是低渗、特低渗油藏,注CO2能够降黏膨胀,降低界面张力,改善地层渗透率,从而提高原油采收率。该技术能够有效解决低渗油藏注水开发难的问题。国内在该技术领域的研究也越来越多,研究还发现,工程上常利用水驱特征曲线方法预测CO2驱动态指标,但水驱和CO2驱在驱油机理、开发动态特征等方面存在明显差异,导致预测结果不准确。为了增加低渗透油藏注CO2方案可靠性,根据油藏工程基本原理建立气驱采收率计算公式,并利用采出程度、采油速度和递减率的相互关系提出了气驱增产比概念,建立气驱提高采收率增幅图版,形成了低渗透油藏注CO2驱提高采收率指标预测方法。通过该油藏工程方法预测白豹油区吴26-75井区,注CO2驱油20年可提高采收率8.12%。同时,对目标区块进行三维地质建模及数值模拟研究,通过数值模拟软件计算,预测区块CO2注气速度20、30、40 t/d的情况下,20年可累计增油20.56万、22.48万、24.13万m3,可分别提高采收率7.82%、8.55%、9.18%。该油藏工程方法预测结果和数值模拟方法预测结果误差较小,可用于低渗透油藏CO2驱油产量预测和开发方案优化设计。该方法可以简单快捷计算CO2提高驱采收率指标,对区块下一步的开发及评价具有指导意义。     

美国:二氧化碳驱油成为油田提高采收率的主导技术

从1970年开始,美国就在得克萨斯州把二氧化碳注入油田作为提高石油采收率（EOR）的一种技术手段,时至今日还在使用。美国是应用二氧化碳驱油研究试验最早、最广泛的国家,利用二氧化碳驱油目前已成为油田提高采收率的主导技术之一。     

油田开发后期静态参数变化及规律研究

油田开发后期一般经历二次采油到三次采油几个开发变化过程,其中后期聚合物驱提高油藏采收率的的主要机理为通过增加注入水的粘度,改善油水流度比扩大注入水在油层中的波及体积从而提高原油采收率.聚驱后油藏继续恢复到聚合物注入前的生产状况,但仍有大量聚合物滞留在地下.所以聚驱后储层的物性参数发生了相应的变化,而储层物性资料对整个油...     

氮气吞吐采油技术在三低砂岩油藏的应用研究

为了改善牛圈湖"低渗、低压、低流度"三低砂岩油藏水驱采油后期油井低产液、高含水井比例高和开发效果差的现状。创新性地引入氮气吞吐提高油井采收率的思路,基于对三低砂岩油藏注氮气吞吐的机理,通过数值模拟手段对注气参数进行优选对比分析,得到了合理的氮气吞吐参数,并在现场进行了应用。结果表明,氮气吞吐采油技术应用后,油井增油效果显著,累计增油5 050 t,为氮气吞吐作为注水驱油的有效接替和补充措施的规模推广奠定了基础。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2014 second batch of rare earth quota released

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2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586