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针对伊拉克H油田油藏地层水温度高、矿化度高,示踪剂使用种类受限的问题,开展了微量物质示踪剂适应性评价研究。利用高效液相色谱-质谱联用仪,通过室内实验,考察了一类微量物质示踪剂在该油田油藏条件下的背景浓度、配伍性、热稳定性、吸附性及其受破乳剂、pH和硫化氢的影响,系统评价了其在高温高盐油藏中的适应性。实验结果表明,微量物质示踪剂无背景浓度,配伍性良好,在油藏温度下不受破坏,不被地层岩石吸附,且不受破乳剂、pH和硫化氢的影响,在该高温高盐条件下具有较好的适应性。微量物质示踪剂技术能够作为高温高盐油田注水效果评价的有效监测手段,可为现场应用提供实验依据。 相似文献
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为了解渤海A油田I1井组注采井间动态连通关系、储层非均质性及整体水驱效果,优选水溶性有机微量物质示踪剂WT-07,对该井实施了为期1.5a的井间示踪剂监测.对各个监测井产出油水样中的示踪剂浓度进行了分析,结合生产动态数据,利用停留时间分布分析法计算了各井井间波及体积、平均停留时间以及洛伦兹系数等参数.结果表明,受益井P... 相似文献
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新型磺酸盐示踪剂作为一类新兴的油田微量物质示踪剂已开始应用于各个油田中。针对同时存在多种磺酸盐示踪剂的油田样品,建立了可同时分析5种新型井间磺酸盐类示踪剂的液质联用(LC-MS)分析法。该分析法采用Agilent Poroshell C18色谱柱分离,以超纯水(0.5%甲酸、0.15%四丁基溴化铵)-乙腈为流动相梯度洗脱,电喷雾离子源(ESI)负模式检测。结果表明,该方法线性关系良好,相关系数R2≥0.999,回收率为97.1%~103.7%,5种磺酸盐的检测限均≤1μg/L,且能在10min内完成全部示踪剂的流出,实现了快速准确的检测目的,满足了油田监测要求。 相似文献
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随着油田的开发,井间示踪剂测剩余油显的越来越重要了;本文介绍了分光光度计的工作原理、水样中的分配和非分配示踪剂配制及其含量的测试方法的改进,该方法主要有操作简单、快速以及具有较高的精确度,满足了油田上的需要。 相似文献
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在油田的注水开发中,利用化学示踪剂进行井间连通性测试是了解出水优势通道特征、制定提高采收率方案的必要前提。但常见的荧光示踪剂在现场应用中易受原油中荧光物质的干扰导致识别率和检测精度较低,严重影响测试结果的准确性。采用三维荧光光谱法与平行因子分析法相结合的分析方法,对在多种荧光物质干扰下的模拟采出液中的荧光示踪剂进行定性分析与定量分析,成功得出模拟采出液中荧光示踪剂浓度,经计算平均相对误差约为12.75%。该方法用三维荧光光谱的数据处理代替传统的荧光背景测试,去除模拟采出液中不同荧光物质对待检测示踪剂的干扰,具有操作简单、准确性高、成本低、检测速度快的特点,可广泛应用于复杂背景条件下荧光示踪剂的快速检测。 相似文献
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优选5种无毒环保、成本低廉以及与压裂液配伍性良好的水溶性有机微量物质示踪剂,对鄂尔多斯盆地北缘L致密砂岩气田分层暂堵转向分层压裂完井的L-A井盒3、盒4段2个压裂层位5个压裂段塞的压裂液返排过程进行了定量监测.分析了压后28d内不同时刻取得的返排水样中各种示踪剂的浓度,通过物质平衡法计算得到了该井笼统及设计的各层、各段... 相似文献
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为有效封堵优势渗流通道,解决注入溶液窜流突进及沿优势渗流通道无效循环对改善油田开发效果以及达到控水稳油的目的具有重要意义。应用数值模拟示踪剂方法研究优势渗流通道的动态反映特征,筛选出影响和标志优势渗流通道存在的主要参数指标并分析其相关特性,制定基于油藏模拟的优势渗流通道判别标准和成果表征,实现定量识别优势渗流通道的方法,对油田开发控水提效具有重要意义。 相似文献
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E. A. Emken 《Lipids》2001,36(9):965-973
The use of stable isotope tracers for investigating fatty acid metabolism in human subjects has increased substantially over
the last decade. Advances in analytical instrumentation, commercial availability of labeled substrates, and safety considerations
are major reasons for this increased use of stable isotope tracers. Several experimental design options are available for
using either deuterium or carbon-13 as tracers for fatty acid and lipid studies. Options include feeding a pulse dose of labeled
fat or a mixture containing two or more labeled fats. Multiple doses of the labeled fat can be fed at timed intervals to increase
enrichments. Administration by injection or continuous intravenous infusion is an alternative. Another option is to use diets
containing foods from plants that have slightly higher natural carbon-13 enrichment. Each basic experimental design has its
specific strengths, and the best choice of experimental design depends on the study objectives. Stable isotope studies have
been used to address a variety of questions related to unsaturated fatty acid metabolism in humans. Examples are provided
that illustrate the use of stable isotopes to investigate oxidation of docosahexaenoic acid, desaturation of linoleic and
linolenic acids in infants and adults, incorporation of long-chain n−6 and n−3 fatty acids, bioequivalency of linolenic acid
in primates, 13C nuclear magnetic resonance spectra of arachidonic acid in living rat brain, and effect of triacylglycerol structure on absorption.
Radioisotope and stable isotope tracer studies in animals and humans are responsible for much of our understanding of fatty
acid and lipid metabolism. However, tracer studies have limitations, and there are some unresolved issues associated with
isotope studies. Examples of unresolved issues are quantification of isotope data, validity of in vivo fatty acid metabolite results, kinetic modeling, subject variability, and use of blood lipid data as a reflection of tissue
lipid metabolism. Resolving these issues, developing novel methodology, and applying stable isotope tracer methods to questions
related to PUFA metabolism are broad areas of interesting and challenging research opportunities. 相似文献
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水溶性染色剂诱惑红和丽春红-G作为农药沉积分布的示踪剂研究 总被引:7,自引:0,他引:7
光谱分析表明,食品染色剂诱惑红和生物染色剂丽春红-G的最大吸收波长分别为501nm和510nm;在连续2、4、6、8、10h阳光照射下,分解率分别在2.4%~5.8%和3.4%-10.8%之间,见光稳定性良好;两种染色剂在棉花叶片和玻璃片上的洗脱回收率都很高,说明易于从靶标上洗脱下来;进一步测定表明,两种染色剂在小麦、甘蓝、黄瓜、番茄叶片上的洗脱回收率各不相同,所以对准备进行测试的作物应先做一次洗脱回收率试验,用以校正测试结果;田间应用表明,用两种染色剂做示踪剂,可以方便地测定常量喷雾和低容量喷雾过程中农药在麦田的沉积分布情况。以卜实聆结果说明.两种染仁.剂作为测守农药沉积分布的示踪剂方便可行. 相似文献
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Majid Rasouli Francois Bertrand Jamal Chaouki 《American Institute of Chemical Engineers》2015,61(2):384-394
Radioactive particle tracking is a nonintrusive technique that has been successfully used to study the flow dynamics in a wide range of reactors and blenders. However, it is still limited to the tracking of only one tracer at a time. A multiple radioactive particle tracking (MRPT) technique that can determine the trajectory of two free or restricted (attached to the same particle) moving tracers in a system is introduced. The accuracy (<5 mm) and precision (<5 mm) of the proposed technique is evaluated by tracking two stationary tracers and two moving tracers. The results confirm the reliability and validity of the MRPT technique when the two tracers have the same isotope and the distance between them is not too small (>2 cm). The tracking of two sticking tracers at the two ends of a cylindrical particle in a rotating drum is also considered to illustrate the potential of this characterization method. © 2014 American Institute of Chemical Engineers AIChE J, 61: 384–394, 2015 相似文献
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我国的大多数油田都已步入了开发后期阶段,生产井含水较高,对油气田开发动态监测技术有着更高的要求。油气田开发动态监测作为油田生产工作的基础,是油田开发过程中不可或缺的一个环节,是油气田合理开发的保障。根据油气田开发动态监测技术内容,提出其发展面临的主要问题。并基于上述研究,对数值试井分析技术进行分析,预测现阶段油气田开发动态监测技术的发展方向。 相似文献