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Assessment of the Elastic-Wave Well Treatment in Oil-Bearing Clastic and Carbonate Reservoirs
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作者 Vladimir Poplygin Chengzhi Qi +4 位作者 Mikhail Guzev Evgenii Kozhevnikov Artem Kunitskikh Evgenii Riabokon Mikhail Turbakov 《Fluid Dynamics & Materials Processing》 EI 2023年第6期1495-1505,共11页
A set of techniques for well treatment aimed to enhance oil recovery are considered in the present study.These are based on the application of elastic waves of various types(dilation-wave,vibro-wave,or other acoustica... A set of techniques for well treatment aimed to enhance oil recovery are considered in the present study.These are based on the application of elastic waves of various types(dilation-wave,vibro-wave,or other acoustically induced effects).In such a context,a new technique is proposed to predict the effectiveness of the elastic-wave well treatment using the rank distribution according to Zipf’s law.It is revealed that,when the results of elastic wave well treatments are analyzed,groups of wells exploiting various geological deposits can differ in terms of their slope coefficients and free members.As the slope coefficient increases,the average increase in the well oil production rate(after the well treatment)becomes larger.An equation is obtained accordingly for estimating the slope coefficient in the Zipf’s equation from the frequency of the elastic wave.The obtained results demonstrate the applicability of the Zipf’s law in the analysis of the technological efficiency of elastic-wave well treatment methods. 展开更多
关键词 Elastic wave well treatment oil well rate Zipf’s law rank distribution slope coefficient
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频率矫正广义S变换及在储层含油气性预测中的应用
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作者 刘乃豪 魏圣焘 +5 位作者 张泽洲 杨阳 王治国 刘镕菖 路漫 高静怀 《地球物理学报》 SCIE EI CAS CSCD 北大核心 2024年第7期2820-2829,共10页
随着我国油气勘探程度的不断加深,陆相页岩油气等非常规油气逐渐成为我国勘探开发的重点,陆相页岩非均质性强、储层薄且纵横向变化剧烈等典型特征导致含油气性预测精度差,影响后续井位部署和生产等.时频变换方法是储层含油气性预测最有... 随着我国油气勘探程度的不断加深,陆相页岩油气等非常规油气逐渐成为我国勘探开发的重点,陆相页岩非均质性强、储层薄且纵横向变化剧烈等典型特征导致含油气性预测精度差,影响后续井位部署和生产等.时频变换方法是储层含油气性预测最有效的工具.为了提高储层含油气性预测的精度,本文提出了一种频率矫正广义S变换(Frequency-Corrected Generalized S-Transform, FCGST),该变换既具有S变换多尺度多分辨率的特性,又可以通过自适应选取窗函数参数以控制窗函数的带宽和主频等,这一特性可以适用于不同工区地震数据的处理与解释.与传统的S变换和广义S变换不同,该变换修正了传统S变换和广义S变换中的尺度因子,改善了S变换和广义S变换等传统方法中时频谱主频向高频方向偏移的问题,有利于精确描述复杂储层含油气性.合成数据算例表明,频率矫正广义S变换提升了地震信号局部时频特征的表征能力;将频率矫正广义S变换应用于鄂尔多斯盆地某工区储层含油气性预测中,实钻结果数据进一步验证了该时频分析方法在储层含油气性解释中的有效性和潜力. 展开更多
关键词 时频分析 广义s变换 频率矫正广义s变换 储层含油气性预测
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In Vitro Evaluation of the Antifungal Activity of Essential Oils of Thymus vulgaris and Cymbopogon citratus on Some Strains of Sclerotinia sclerotiorum, Agent Responsible for White Rot of Beans
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作者 Serge Bertrand Mboussi Alain Heu +2 位作者 Abdou Nourou Kone Nsangou Jules Patrice Ngoh Dooh Zachée Ambang 《Agricultural Sciences》 2023年第8期1068-1086,共19页
The present work was aimed to the study of the antifungal activity of essential oils of two aromatic plants against three strains of Sclerotinia sclerotiorum responsible for white rot of bean. The two essential oils (... The present work was aimed to the study of the antifungal activity of essential oils of two aromatic plants against three strains of Sclerotinia sclerotiorum responsible for white rot of bean. The two essential oils (EO) of the studied plants: Thymus vulgaris (HET) and Cymbopogon citratrus (HEC), used at different concentrations: C1 (0.75 ml/ml), C2 (1.5 ml/ml) and C3 (3 ml/ml) presented significant inhibitory activities on the three tested fungal strains namely Bia 1, Bia 2, and Njo 2. Two control treatments (T-: containing no antifungal substance and T+: synthetic fungicide) were also used. The antifungal activity here is related to the inhibition of mycelial growth especially with high concentrations of essential oils. Thus, against S. sclerotiorum, HET showed the highest activity comparable to that of T+ (100% inhibition) at all concentrations on the Bia 1 and Bia 2 strains and at concentration C3 on the Njo 2 strain compared to that of HEC, which certainly inhibited the mycelial growth of the different strains considerably (with a maximum of 78.15% on the Njo 2 strain) but not completely. According to their sensitivity, the Bia 2 strain showed a higher sensitivity to essential oils than the others while the Njo 2 strain was more aggressive. On the basis of MIC<sub>50</sub> and MIC<sub>90</sub> obtained on the Njo 2 strain, the HET turns out to be the most efficient with respective lower values of (1.73 and 23.34 ml/ml) against (4.76 and 26.03 ml/ml) for the HEC. These EO could thus be exploited as biodegradable antifungal substances, likely to control white rot of bean. 展开更多
关键词 s. sclerotiorum T. vulgaris C. Citratrus Essential oils Antifungal Activity INHIBITION
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ZnFe-LDHs型固井水泥H_(2)S防腐剂制备及性能评价
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作者 何敏会 姚明 +2 位作者 闫宇博 梅开元 程小伟 《钻井液与完井液》 CAS 北大核心 2024年第3期364-373,共10页
我国高酸性油气田资源丰富,但在开发过程中固井水泥石将长期受到H_(2)S等酸性介质的侵蚀,严重威胁到油气井的施工和安全生产。针对此问题,采用水热共沉淀法制备了ZnFe-LDHs型H_(2)S防腐剂,并将掺有优选出的ZnFe-LDHs的水泥石置于5%浓度... 我国高酸性油气田资源丰富,但在开发过程中固井水泥石将长期受到H_(2)S等酸性介质的侵蚀,严重威胁到油气井的施工和安全生产。针对此问题,采用水热共沉淀法制备了ZnFe-LDHs型H_(2)S防腐剂,并将掺有优选出的ZnFe-LDHs的水泥石置于5%浓度的Na_(2)S溶液中分别在常温及60℃下浸泡1、3、7、14、28 d,通过抗压强度测试、XRD、SEM等表征手段,分析ZnFe-LDHs对水泥石的防H_(2)S腐蚀能力和作用机理。结果表明,晶化温度为90℃下制备的Zn/Fe物质的量的比为(1~4)∶1的ZnFe-LDHs性能较好,均可提高水泥石的抗压强度,且强度随着Zn/Fe物质的量的比增加而增大,即掺加了Zn/Fe物质的量的比为4∶1的ZnFe-LDHs水泥石的作用效果最为明显,其强度增长了10.11%,而经Na2S溶液浸泡后,其早期强度降低,浸泡7 d时其强度相比于浸泡前在常温及60℃下分别增长了8.73%、4.96%,7 d后强度基本趋于稳定,这是由于ZnFe-LDHs能促进水化反应,并在浸泡后期与Na2S反应生成ZnS,提高水泥石的致密性,从而有效防止H_(2)S对水泥石的腐蚀。 展开更多
关键词 ZnFe-LDHs 固井水泥 防腐剂 H_(2)s
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美藤果油对Aβ_(25-35)诱导的SH-SY5Y阿尔兹海默症细胞的保护作用
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作者 曾文燊 刘冰 +4 位作者 张桓 彭卢炜 赖岚玉 杜冰 黎攀 《现代食品科技》 CAS 北大核心 2024年第6期12-19,共8页
该研究以人神经母细胞瘤细胞(SH-SY5Y)探讨美藤果油对Aβ_(25-35)诱导阿尔兹海默症模型细胞的潜在保护作用。经Aβ_(25-35)和不同剂量的美藤果油干预后,测定美藤果油对AD模型细胞的抗氧化、抗凋亡等指标的变化。结果显示,在0~40μg/mL... 该研究以人神经母细胞瘤细胞(SH-SY5Y)探讨美藤果油对Aβ_(25-35)诱导阿尔兹海默症模型细胞的潜在保护作用。经Aβ_(25-35)和不同剂量的美藤果油干预后,测定美藤果油对AD模型细胞的抗氧化、抗凋亡等指标的变化。结果显示,在0~40μg/mL的剂量下,美藤果油对细胞活力不会产生影响,在0~100μg/L的剂量下,Aβ_(25-35)对细胞损伤程度上升,选用25μg/L的剂量诱导AD细胞模型。培养完成后,测定美藤果油对细胞的SOD、MDA水平,同时利用流式细胞术分析细胞凋亡程度、测定线粒体膜电位以及ROS水平,并采用western blot技术研究细胞Nrf-2、HO-1、Bcl-2、Bax蛋白表达水平。结果显示,20、40μg/mL剂量组细胞MDA含量水平分别降低了24.24%、42.73%,ROS含量水平分别降低了15.34%、25.53%,SOD的含量分别提高了20.81%、27.27%(P<0.005)。此外,美藤果油能够回调细胞线粒体膜电位,改善细胞凋亡,同时上调Nrf-2/HO-1抗氧化通路表达,增加抗凋亡蛋白Bcl-2表达、下调促凋亡蛋白Bax的表达。综上所述,美藤果油能够通过改善氧化应激损伤,逆转细胞凋亡来达到保护细胞的作用,其机制可能与增强Nrf-2/HO-1抗氧化通路,调节凋亡相关蛋白表达有关。 展开更多
关键词 美藤果油 阿尔兹海默症 抗氧化 抗凋亡
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基于OIL和RDFS的语义化Web逻辑扩展 被引量:1
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作者 姚绍文 宗勇 +1 位作者 刘爱莲 周明天 《计算机科学》 CSCD 北大核心 2002年第2期43-47,共5页
1引言Web的发展使得Internet能够迅速地普及,通过Web人们可以得到各种各样的服务.随着新的应用不断加入到Web应用,Web的发展面临着应用标准不兼容、语义定义不严格、有效性和结构化缺乏等大量问题.这些问题使得针对Web资源难以进行机器... 1引言Web的发展使得Internet能够迅速地普及,通过Web人们可以得到各种各样的服务.随着新的应用不断加入到Web应用,Web的发展面临着应用标准不兼容、语义定义不严格、有效性和结构化缺乏等大量问题.这些问题使得针对Web资源难以进行机器自动查询、检索. 展开更多
关键词 INTERNET oil RDFs WEB 语义化Web逻辑扩展 数据库
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表面接枝C—S—H的岩沥青对高温油井水泥石力学性能的影响
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作者 王佳 张春梅 +2 位作者 张晔 程小伟 梅开元 《钻井液与完井液》 CAS 北大核心 2023年第6期806-814,共9页
研究了表面接枝C—S—H的岩沥青对高温油井水泥石力学性能和微观结构的影响,采用压力试验机及XRD、TG、SEM和EDS对油井水泥石的力学性能和微观结构进行了测试和表征。研究结果表明,与纯水泥石相比,掺入1%未改性岩沥青的水泥石3 d抗压强... 研究了表面接枝C—S—H的岩沥青对高温油井水泥石力学性能和微观结构的影响,采用压力试验机及XRD、TG、SEM和EDS对油井水泥石的力学性能和微观结构进行了测试和表征。研究结果表明,与纯水泥石相比,掺入1%未改性岩沥青的水泥石3 d抗压强度下降了2.98%,而掺入1%表面接枝C—S—H岩沥青的水泥石3 d抗压强度提高了4.26%。物相分析和热重实验表明,表面接枝C—S—H岩沥青的加入不会引起水化产物类型的变化,而掺量为3%表面接枝C—S—H的岩沥青水泥石养护3 d的失重量比纯水泥石高1.01%,说明表面接枝C—S—H的岩沥青可以促进水泥的水化。水泥石的微观形貌和元素分析表明,未改性岩沥青在180℃下热解导致沥青颗粒破碎,而接枝C—S—H的岩沥青表面形成的富Si层可以避免沥青颗粒因气孔而引起破碎,使得未改性岩沥青水泥石界面处的C元素含量较接枝C—S—H的岩沥青水泥石高29.14%,未改性岩沥青水泥石基体中C元素含量较接枝C—S—H的岩沥青水泥石高13.76%。 展开更多
关键词 岩沥青 C—s—H晶种 化学接枝 油井水泥 高温固井
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Distribution and treatment of harmful gas from heavy oil production in the Liaohe Oilfield, Northeast China 被引量:6
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作者 Zhu Guangyou Zhang Shuichang +5 位作者 Liu Qicheng Zhang Jingyan YangJunyin Wu Tuo Huang Yi Meng Shucui 《Petroleum Science》 SCIE CAS CSCD 2010年第3期422-427,共6页
The distribution and treatment of harmful gas (H2S) in the Liaohe Oilfield, Northeast China, were investigated in this study. It was found that abundant toxic gas (H2S) is generated in thermal recovery of heavy oi... The distribution and treatment of harmful gas (H2S) in the Liaohe Oilfield, Northeast China, were investigated in this study. It was found that abundant toxic gas (H2S) is generated in thermal recovery of heavy oil. The H2S gas is mainly formed during thermochemical sulfate reduction (TSR) occurring in oil reservoirs or the thermal decomposition of sulfocompounds (TDS) in crude oil. H2S generation is controlled by thermal recovery time, temperature and the injected chemical compounds. The quantity of SO4^2- in the injected compounds is the most influencing factor for the rate of TSR reaction. Therefore, for prevention of H2S formation, periodic and effective monitoring should be undertaken and adequate H2S absorbent should also be provided during thermal recovery of heavy oil. The result suggests that great efforts should be made to reduce the SO4^2- source in heavy oil recovery, so as to restrain H2S generation in reservoirs. In situ burning or desulfurizer adsorption are suggested to reduce H2S levels. Prediction and prevention of H2S are important in heavy oil production. This will minimize environmental and human health risks, as well as equipment corrosion. 展开更多
关键词 Toxic gas H2s heavy oil production TsR Liaohe oilfield
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The relationship between international crude oil prices and China's refined oil prices based on a structural VAR model 被引量:4
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作者 Song Han Bao-Sheng Zhang +1 位作者 Xu Tang Ke-Qiang Guo 《Petroleum Science》 SCIE CAS CSCD 2017年第1期228-235,共8页
With the frequent fluctuations of international crude oil prices and China's increasing dependence on foreign oil in recent years, the volatility of international oil prices has significantly influenced China domesti... With the frequent fluctuations of international crude oil prices and China's increasing dependence on foreign oil in recent years, the volatility of international oil prices has significantly influenced China domestic refined oil price. This paper aims to investigate the transmission and feedback mechanism between international crude oil prices and China's refined oil prices for the time span from January 2011 to November 2015 by using the Granger causality test, vector autoregression model, impulse response function and variance decomposition methods. It is demonstrated that variation of international crude oil prices can cause China domestic refined oil price to change with a weak feedback effect. Moreover, international crude oil prices and China domestic refined oil prices are affected by their lag terms in positive and negative directions in different degrees. Besides, an international crude oil price shock has a signif- icant positive impact on domestic refined oil prices while the impulse response of the international crude oil price variable to the domestic refined oil price shock is negatively insignificant. Furthermore, international crude oil prices and domestic refined oil prices have strong historical inheri- tance. According to the variance decomposition analysis, the international crude oil price is significantly affected by its own disturbance influence, and a domestic refined oil price shock has a slight impact on international crude oil price changes. The domestic refined oil price variance is mainly caused by international crude oil price disturbance, while the domestic refined oil price is slightly affected by its own disturbance. Generally, domestic refined oil prices do not immediately respond to an international crude oil price change, that is, there is a time lag. 展开更多
关键词 International crude oil prices China's refinedoil prices VAR model Granger causality - Impulseresponse Variance decomposition
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Production of microbial oils co-fermented by Trichoderma.koningii and Trichosporon cutaneum with Daqu distiller's grains 被引量:2
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作者 李新社 陆步诗 唐伟 《Journal of Central South University》 SCIE EI CAS 2011年第5期1738-1743,共6页
Abstract: Daqu distiller's grains were co-fermented as raw materials by Trichoderma.koningii and Trichosporon cutaneum to produce microbial oils, which can provide raw materials for bio-diesel development. The singl... Abstract: Daqu distiller's grains were co-fermented as raw materials by Trichoderma.koningii and Trichosporon cutaneum to produce microbial oils, which can provide raw materials for bio-diesel development. The single factor tests were used to investigate the effects of ratio of strains, inoculum size, culture temperature and culture time on the production of microbial oils. The best processing conditions were obtained by orthogonal test through measuring the content of microbial oils in product. The result shows that the microbial oils content of the co-fermented product under the ratio of Trichoderma.koningii to Trichosporon cutaneum of 1:1, the inoculum size of strains of 11% at 28 ℃ for 6 d is 7.15 g/L. It is shown that the production of microbial oils co-fermented by Trichoderma.koningii and Trichosporon cutaneum with Daqu distiller's grains is possible. The research provides a new idea for the reuse of Daqu distiller's grains and also provides a new way for the development of microbial oils. 展开更多
关键词 Daqu distiller's grains Trichoderma.koningii Trichosporon cutaneum CO-FERMENTATION microbial oils
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Predictive Model for Corrosion Rate of Oil Tubes in CO_2/H_2S Coexistent Environment Part Ⅰ: Building of Model 被引量:5
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作者 李全安 白真权 +3 位作者 黄得志 张清 文九巴 李鹤林 《Journal of Southwest Jiaotong University(English Edition)》 2004年第2期141-147,共7页
Based on an analysis of the existing models of CO 2 corrosion in literatures and the autoclave simulative experiments, a predictive model of corrosion rate (r corr) in CO 2/H 2S corrosion for oil tubes has been ... Based on an analysis of the existing models of CO 2 corrosion in literatures and the autoclave simulative experiments, a predictive model of corrosion rate (r corr) in CO 2/H 2S corrosion for oil tubes has been established, in which r corr is expressed as a function of pH, temperature (T), pressure of CO 2 (P CO 2) and pressure of H 2S (P H 2S). The model has been verified by experimental data obtained on N80 steel. The improved features of the predictive model include the following aspects: (1) The influence of temperature on the protectiveness of corrosion film is taken into consideration for establishment of predictive model of the r corr in CO 2/H 2S corrosion. The Equations of scale temperature and scale factor are put forward, and they fit the experimental result very well. (2) The linear relationship still exists between ln r corr and ln P CO 2 in CO 2/H 2S corrosion (as same as that in CO 2 corrosion). Therefore, a correction factor as a function of P H 2S has been introduced into the predictive model in CO 2/H 2S corrosion. (3) The model is compatible with the main existing models. 展开更多
关键词 Predictive model CO 2/H 2s corrosion Corrosion rate scale temperature oil tube
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Anti-inflammation Activities of Essential Oil and Anti-microbial Activities Of Ethanol Extraction from China's Rosemary 被引量:1
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作者 Jingbo ZHOU Ruqiang HUANG +1 位作者 Jihong HUANG Junwei FENG 《Agricultural Science & Technology》 CAS 2015年第5期1034-1037,1047,共5页
Rosemary(Rosmarius officinalis L.), an endemic plant species in south region of China, is traditionally used as a spice. In this research, the anti-inflammatory activities of essential oil and the antibacterial activi... Rosemary(Rosmarius officinalis L.), an endemic plant species in south region of China, is traditionally used as a spice. In this research, the anti-inflammatory activities of essential oil and the antibacterial activities of ethanol extraction were determined, respectively. Results showed that based on the GC-MS analysis there were 35 kinds of active ingredients in the essential oil in totally, mainly including D-limonene(24.158 ml/L), α-Pinene(23.325 ml/L), Camphor(9.855 ml/L),Camphene(7.076 ml/L), Verbenone(6.685 ml/L), Borneol(5.580 ml/L), etc. The LCUV determination indicated that the main components in the ethanol extractionwere rosmarinic acid(3 910 mg/kg) and carnosic acid(2 970 mg/kg). By mice peritoneal macrophage phagocytosis of chicken erythrocytes experiment, the essential oil of rosemary was shown having a significant role in anti-inflammation. And the ethanol extraction had broad-spectrum antibacterial effects, but had no effect on mold by the agar diffusion method of 8 bacteria. As a result, both rosemary essential oil and ethanol extraction had good potential medicinal values. 展开更多
关键词 China's rosemary Essential oil EXTRACTION Anti-inflammation activity Anti-microbial activity
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A novel type curve for estimating oil recovery factor of gas flooding 被引量:1
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作者 TANG Yong ZHANG Haochuan +6 位作者 HE Youwei GUO Xiaodong FAN Kun WU Zangyuan ZHOU Daiyu TAO Zhengwu LI Jinlong 《Petroleum Exploration and Development》 CSCD 2022年第3期605-613,共9页
A novel type curve is presented for oil recovery factor prediction suitable for gas flooding by innovatively introducing the equivalent water-gas cut to replace the water cut,comprehensively considering the impact of ... A novel type curve is presented for oil recovery factor prediction suitable for gas flooding by innovatively introducing the equivalent water-gas cut to replace the water cut,comprehensively considering the impact of three-phase flow(oil,gas,water),and deriving the theoretical equations of gas flooding type curve based on Tong’s type curve.The equivalent water-gas cut is the ratio of the cumulative underground volume of gas and water production to the total underground volume of produced fluids.Field production data and the numerical simulation results are used to demonstrate the feasibility of the new type curve and verify the accuracy of the prediction results with field cases.The new type curve is suitable for oil recovery factor prediction of both water flooding and gas flooding.When a reservoir has no gas injected or produced,the gas phase can be ignored and only the oil and water phases need to be considered,in this case,this gas flooding type curve returns to the Tong’s type curve,which can evaluate the oil recovery factor of water flooding.For reservoirs with equivalent water-gas cuts of 60%-80%,the regression method of the new type curve works well in predicting the oil recovery factor.For reservoirs with equivalent water-gas cuts higher than 80%,both the regression and assignment methods of the new type curve can accurately predict the oil recovery factor of gas flooding. 展开更多
关键词 gas flooding reservoir equivalent water-gas cut type curve of gas flooding oil recovery factor prediction chart Tong’s type curve
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Prospect Analysis of the United States' Crude Oil Exports to the Asia-Pacific Region 被引量:1
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作者 Chen Bo Wang Pei Liu Wenqing 《China Oil & Gas》 CAS 2018年第2期41-48,共8页
At the end of 2015, the United States lifted a 40-year ban on crude oil exports, which has far-reaching implications for the global crude oil market and crude oil trade patterns. Since the release of crude oil exports... At the end of 2015, the United States lifted a 40-year ban on crude oil exports, which has far-reaching implications for the global crude oil market and crude oil trade patterns. Since the release of crude oil exports, with the recovery of crude oil production and improved export infrastructure in the United States, U.S. crude oil exports have been growing rapidly, with an average of about one million barrels/day in 2017, making the U.S one of the major global crude oil exporters. Currently, the AsiaPacific region has replaced North America as the first major destination for U.S. crude oil exports. In light of future trends in the oil refining industry of the Asia-Pacific region, it will usher in a new wave of refinery operations around 2020 and crude oil imports will continue to grow rapidly. The American region, represented by the United States, will replace West Africa as the second largest source of crude oil imports to the Asia-Pacific region, and that energy trade cooperation between the Asia-Pacific region and the United States will continue to grow. In particular, for China, the United States will become an important source of crude oil imports for our country in the future, and the two countries will shift from the past of energy competition to energy cooperation. Sino-US energy trade will play a more active role in economic and trade cooperation between the two countries. 展开更多
关键词 U.s. crude oil exports AsIA-PACIFIC China Refining capacity Trade pattern Infrastructure Economic efficiency
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Topology Chemical Process Research on the Condensing and Growing Phase Multi Micro Oil Droplets Based on Hydrodynamics
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作者 周毅 李旋旗 +1 位作者 张东翔 TAPACOB B B 《Journal of Beijing Institute of Technology》 EI CAS 2009年第1期84-88,共5页
The hydrodynamic research about the droplet condensing of the multi phase liquid state on the surface of the coal glass and water discusses the deepening process of convex shape curve and the formation of S shape, and... The hydrodynamic research about the droplet condensing of the multi phase liquid state on the surface of the coal glass and water discusses the deepening process of convex shape curve and the formation of S shape, and puts emphasis on describing the diagram formation method of the later. In the induction period the active diagram of the micro droplet is decided by pH value forming as convex shape diagram or S shape diagram. When pH value is above 4.0, the damage of convex shape diagram cannot be recovered, in that case produce S shape activity diagram. When pH value is equal to or above 12.0, the hard surface with alkali liquid state loses adhesion, so that the micro droplet condensing of the multi phase liquid state stops completely. The research result shows that the water cleaning conditions of getting rid of the oil micro droplets can be decided by the pH value. 展开更多
关键词 growing of micro oil droplet condensing of micro oil droplet topology chemical process convexshape diagram s shape diagram
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Exploration Technology for Complex Sandstone Reservoirs in the Developed Area of Shengli Oilfield 被引量:3
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作者 Li Yang, Zhang Zonglin (Shengli Oilfield Company Ltd., SINOPEC, Shandong, Dongying 257001) 《工程科学(英文版)》 2003年第2期67-74,共8页
Jiyang depression, which is the main oil productive area of Shengli oil field, is located at the southeast part of the Bohai Bay Basin and is a terrestrial lacustrine rift subsidence basin formed in the late Mesozoic ... Jiyang depression, which is the main oil productive area of Shengli oil field, is located at the southeast part of the Bohai Bay Basin and is a terrestrial lacustrine rift subsidence basin formed in the late Mesozoic with fully developed fault system. The main hydrocarbon productive formations of this depression are the terrestrial clastic rocks of the Tertiary, which are of strong lateral variation. The complex fault reservoirs and subtle lithological reservoirs distributed extensively and are becoming the main exploration targets in recent years. The exploration and development practice in these years has formed the exploration technologies, mainly including detailed study and description of low grade faults, delineation of microstructures, facies constrained formation description and prediction and low resistivity oil bearing formation’s identification. These exploration technologies have resulted in remarkable effectiveness on the reserve and oil production increments. 展开更多
关键词 petroliferous area COMPLEX sANDsTONE reservoir LOW grade fault microstructure FACIEs constrained formation prediction LOW REsIsTIVITY oil bearing formation’s identification
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Control of Tetranychus urticae Koch by extracts of three essential oils of chamomile,marjoram and Eucalyptus 被引量:2
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作者 Abd El-Moneim MR Afify Fatma S Ali Turky AF 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2012年第1期24-30,共7页
Objective:To evaluate the acaricidal activity of extracts of three essential oils of chamomile,marjoram and Eucalyptwi against Tetranychus urtiaie(T.urticae.)Koch.Methods:Extracts of three essential oils of chamomile,... Objective:To evaluate the acaricidal activity of extracts of three essential oils of chamomile,marjoram and Eucalyptwi against Tetranychus urtiaie(T.urticae.)Koch.Methods:Extracts of three essential oils of chamomile,marjoram and Eucalyptus with different concentrations(0.5%,1.0%,2.0%,3.0%and 4.0%)were used to control T.urticae Koch.Results:The results showed that chamomile(Chamomilla recutita)represented the most potent efficient acaricidal agent against Tetranychus followed by marjoram(Marjorana hortensis)and Eucalyptus.The LC_(50)values of chamomile,marjoram and Eucalyptus for adults were 0.65,1.84 and 2.18,respectively and for eggs 1.17,6.26 and 7.33,respectively.Activities of enzymes including glutathione-Stxansferase,esterase(α-esterase andβ-esterase)and alkaline phosphatase in susceptible mites were determined and activities of enzymes involved in the resistance of acaricides were proved.Protease enzyme was significantly decreased at LC_(50)of both chamomile and marjoram compared with positive control.Gas chromatography-mass spectrometer(CC-MS)proved that the major compositions of Chamomilla recutita areα-bisabolol oxide A(35.251%),and trans-3-farersene(7.758%),while the main components of Marjorana hortensis are terpincne-4-ol(23.860%),p-cymene(23.404%)and sabinene(10.904%).Conclusions:It can be concluded that extracts of three essential oils of chamomile,marjoram and Eucalyptus possess acaricidal activity against T.urticae. 展开更多
关键词 TETRANYCHIDAE Plant essential oils Enzymes GLUTATHIONE-s-TRANsFERAsE Non specific EsTERAsE Alkaline PHOsPHATAsE Protease CHAMOMILE Marjoram EUCALYPTUs
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Feasibility of a New Granular Rapid Release Elemental S Fertilizer in Preventing S Deficiency of Canola on a S-Deficient Soil
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作者 Sukhdev S. Malhi Cecil L. Vera Stewart A. Brandt 《Agricultural Sciences》 2014年第11期1025-1036,共12页
Our previous research has indicated that granular elemental S (ES) fertilizers are not effective in the year of application and also are not consistently as effective as sulphate-S in increasing seed yield of canola i... Our previous research has indicated that granular elemental S (ES) fertilizers are not effective in the year of application and also are not consistently as effective as sulphate-S in increasing seed yield of canola in subsequent years, especially when applied at seeding in spring, because of slow dispersion of elemental S particles from granules for subsequent oxidation of ES to sulphate-S. A field experiment was established in autumn 2010 to determine the relative effectiveness of a new rapid release elemental S (RRES, now called Vitasul) fertilizer, in comparison to sulphate-S fertilizer, with various combinations of application times and placement methods (applied at 20 kg&middotS&middotha-1) on seed yield, straw yield, oil and protein concentration in seed, N and S uptake, partial factor productivity (PFP—kg&middotseed&middotkg-1 applied N&middotha-1—blanket application of 120 kg&middotN&middotha-1), S use efficiency (SUE—increase in kg&middotseed&middotkg-1 applied S&middotha-1) and percent recovery of applied S in seed + straw (%) of canola in 2011, 2012 and 2013 growing seasons on a S-deficient Gray Luvisol loam soil at Star City, Saskatchewan. The 11 treatments included two granular S sources (RRES and potassium sulphate) and five application time/placement method combinations (broadcast in autumn and incorporated in spring, broadcast in spring pre-tillage [broadcast and incorporated], broadcast in spring pre-emergence, sideband in spring and seedrow-placed in spring), plus a zero-S control. There was a significant response of seed yield of canola to applied S in all 3 years, but the responses varied with S source and with application time-placement combinations in different years. Seed yield increased considerably with all sulphate-S treatments compared to the zero-S control, although seed yield tended to be slightly lower in some spring and/or autumn broadcast treatments than the other sulphate-S treatments. Compared to the zero-S control, seed yield also increased significantly with all RRES treatments, but the increase was greater with autumn applied RRES than the spring applied RRES in many cases. Autumn applied RRES produced only slightly lower seed yield but spring applied RRES produced much lower seed yield than the highest yielding spring applied sulphate-S treatments. In 2011, straw yields increased significantly with applied S in some S treatments, but there was no significant effect of S fertilization on straw yield in 2012 and 2013. Oil concentration in canola seed increased only with sulphate-S fertilizer treatments in 2011, and it increased with both sulphate-S and ES sources in 2012 and 2013. There was no effect of any S treatment on the protein concentration in canola seed. The response trends of total N uptake and PFP were usually similar to seed yield for both S sources, but total S uptake, SUE and % recovery of applied S were lower with RRES than sulphate-S in many/most cases. In conclusion, the findings suggested the potential of spring broadcast pre-emergence RRES or autumn broadcast RRES in preventing S deficiency in hybrid canola, although seed yields were still slightly lower than the ideal highest yielding spring broadcast/incorporated sulphate-S treatment. 展开更多
关键词 CANOLA ELEMENTAL s N UPTAKE oil Protein seed Yield sulphate-s s-Deficiency s UPTAKE
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The Potential Application of <i>Syzygium aromaticum</i>and <i>Cymbopogon citratus</i>Essential Oils as Natural Preservatives of Beef Patties
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作者 Fabrice Bruno Siewe Pierre Désiré Mbougueng +2 位作者 Léopold Ngoune Tatsadjieu Thierry Ngangmou Noumo Carl M. F. Mbofung 《Food and Nutrition Sciences》 2015年第3期374-385,共12页
The effect of essential oils from Syzygium aromaticum and Cymbopogon citratus on the lipid oxidation and microbial growth in beef patties was investigated in the present study. Essential oils were incorporated into th... The effect of essential oils from Syzygium aromaticum and Cymbopogon citratus on the lipid oxidation and microbial growth in beef patties was investigated in the present study. Essential oils were incorporated into the beef patties at 0.1% and 0.2% (w/w). The beef patties were then inoculated with cultures of E. coli and S. aureus and stored at 4°C. The control patties were processed without essential oil but inoculated with E. coli or S. aureus. The proximate composition, lipid oxidation and microbial counts were carried out after 7, 14, 21 and 28 days. Results showed that the incorporation of essential oils in beef patties did not significantly (P S. aromaticum at 0.2% reduced the E. coli growth by 1.48 log CFU/g and that of S. aureus by 6.52 log CFU/g while the incorporation of C. citratus at 0.2% reduced the E. coli growth by 1.21 log CFU/g and that of S. aureus by 1.4 log CFU/g after 28 days of storage. The pH measurement during the storage period showed a slight drop during the first 7 days of storage and an increase during the last 21 days in all samples. The sensory test of the beef patties showed that the consumers accepted patties formulated with the two essential oils. But the one made with 0.1% essential oil of S. aromaticum was the most accepted. The analysis of the color of beef patties between 0 and 28 days of storage revealed that the incorporation of essential oils retarded the degradation of the color of patties. Results obtained in the present study indicate the possibility of exploiting Syzygium aromaticum and Cymbopogon citratus essential oils to protect beef patties against lipid oxidation and microbial growth. 展开更多
关键词 s. aromaticum C. citratus Essential oil Beef PATTIEs Lipid Oxidation Microbial stability EsCHERICHIA coli sTAPHYLOCOCCUs AUREUs
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Forecasting Oil Production in North Dakota Using the Seasonal Autoregressive Integrated Moving Average (S-ARIMA) 被引量:1
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作者 Jaesung Choi David C. Roberts EunSu Lee 《Natural Resources》 2015年第1期16-26,共11页
North Dakota’s oil production has been rapidly increasing during the past several years. The state’s oil production in March 2013 even increased to more than twice the quantity produced in March 2011, and the estima... North Dakota’s oil production has been rapidly increasing during the past several years. The state’s oil production in March 2013 even increased to more than twice the quantity produced in March 2011, and the estimated Bakken Formation reserves were reported very large compared with those of the United Arab Emirates. It eventually makes a question to us of how much oil will be able to be actually extracted with currently available technologies. To answer this question, this paper forecasts future oil development trend in North Dakota using the Seasonal Autoregressive Integrated Moving Average (S-ARIMA) model. Nonstationarity derived from a stochastic trend and the abrupt structural change of oil industry was a big potential problem, but through the Quandt Likelihood Ratio test, we found break points, which allowed us to select a model fitting period suitable for the S-ARIMA method to provide accurate statistical inference for the historical period. The seven major oil producing counties were investigated to determine whether the current oil boom was consistent across all oil fields in North Dakota. Empirical estimates show that North Dakota’s oil production will be more than double in the next five years. What we can predict with great certainty is that North Dakota’s influence over domestic and global oil supply systems will increase in the near future, especially over the next five to six years. This is good news for those who are concerned about domestic energy security in the USA. 展开更多
关键词 Bakken FORMATION Forecasting NORTH Dakota oil s-ARIMA
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