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A review on the application of nanofluids in enhanced oil recovery

《化学科学与工程前沿(英文)》 2022年 第16卷 第8期   页码 1165-1197 doi: 10.1007/s11705-021-2120-4

摘要: Enhanced oil recovery (EOR) has been widely used to recover residual oil after the primary or secondary oil recovery processes. Compared to conventional methods, chemical EOR has demonstrated high oil recovery and low operational costs. Nanofluids have received extensive attention owing to their advantages of low cost, high oil recovery, and wide applicability. In recent years, nanofluids have been widely used in EOR processes. Moreover, several studies have focused on the role of nanofluids in the nanofluid EOR (N-EOR) process. However, the mechanisms related to N-EOR are unclear, and several of the mechanisms established are chaotic and contradictory. This review was conducted by considering heavy oil molecules/particle/surface micromechanics; nanofluid-assisted EOR methods; multiscale, multiphase pore/core displacement experiments; and multiphase flow fluid-solid coupling simulations. Nanofluids can alter the wettability of minerals (particle/surface micromechanics), oil/water interfacial tension (heavy oil molecules/water micromechanics), and structural disjoining pressure (heavy oil molecules/particle/surface micromechanics). They can also cause viscosity reduction (micromechanics of heavy oil molecules). Nanofoam technology, nanoemulsion technology, and injected fluids were used during the EOR process. The mechanism of N-EOR is based on the nanoparticle adsorption effect. Nanoparticles can be adsorbed on mineral surfaces and alter the wettability of minerals from oil-wet to water-wet conditions. Nanoparticles can also be adsorbed on the oil/water surface, which alters the oil/water interfacial tension, resulting in the formation of emulsions. Asphaltenes are also adsorbed on the surface of nanoparticles, which reduces the asphaltene content in heavy oil, resulting in a decrease in the viscosity of oil, which helps in oil recovery. In previous studies, most researchers only focused on the results, and the nanoparticle adsorption properties have been ignored. This review presents the relationship between the adsorption properties of nanoparticles and the N-EOR mechanisms. The nanofluid behaviour during a multiphase core displacement process is also discussed, and the corresponding simulation is analysed. Finally, potential mechanisms and future directions of N-EOR are proposed. The findings of this study can further the understanding of N-EOR mechanisms from the perspective of heavy oil molecules/particle/surface micromechanics, as well as clarify the role of nanofluids in multiphase core displacement experiments and simulations. This review also presents limitations and bottlenecks, guiding researchers to develop methods to synthesise novel nanoparticles and conduct further research.

关键词: nanofluid     EOR mechanism     nanoparticle adsorption     interface property     internal property    

pseudo-Janus silica/surfactant assembly and their application to stabilize Pickering emulsions and enhance oilrecovery

《化学科学与工程前沿(英文)》 2022年 第16卷 第7期   页码 1101-1113 doi: 10.1007/s11705-021-2095-1

摘要: Nanoparticles with high surface energy and chemical activity have drawn substantial attention in petroleum industry. Recently, Janus nanoparticles exhibited tremendous potential in enhanced oil recovery (EOR) due to their asymmetric structures and properties. In this study, a series of amphiphilic pseudo-Janus@OTAB (PJ@C18) nanoparticles with different concentrations of stearyltrimethylammoium bromide (OTAB) were successfully fabricated. The structures and properties of PJ@C18 were characterized by Fourier transform infrared spectroscopy and ζ-potential measurements. Based on the emulsification experimental results, the interaction models and the self-assembly behavior between hydrophilic nanoparticles (SiO2@NH2) and OTAB molecules at the oil/water interface were proposed, which was further confirmed via the measurements of the contact angle and dynamic interfacial tension. Interestingly, it was found that the change of pH value from 7.5 to 4.0 caused the type reversal of the PJ@C18-1000 stabilized Pickering emulsions. Furthermore, the PJ@C18-1000 stabilized Pickering emulsion system with excellent salt and temperature tolerances (10000 mg∙L–1, 90 °C) significantly improved the oil recovery in the single-tube (more than 17%) and double-tube (more than 25%) sand pack model flooding tests. The findings of this study could help to better understand the construction mechanism of pseudo-Janus silica/surfactant assembly and the potential application of PJ@C18-1000 stabilized Pickering emulsions for EOR.

关键词: Janus nanoparticles     surfactant     double phase inversion     self-assembly     enhanced oil recovery    

从绿色化学的角度提高石油采收率——通过二氧化碳泡沫进行封存 Perspective

Jennifer A. Clark, Erik E. Santiso

《工程(英文)》 2018年 第4卷 第3期   页码 336-342 doi: 10.1016/j.eng.2018.05.006

摘要:

通过二氧化碳(CO2)驱油来提高石油采收率(EOR),这作为一种经济上可行的碳封存方法受到了相当大的关注,并且最近许多研究都集中在开发增强的CO2发泡添加剂上。然而,人们对这些添加剂在泄漏事件中潜在的长期环境影响知之甚少,并且考虑到在典型的CO2 EOR操作中注入添加剂的量,其对环境的影响可能是深远的。本文概述了表面活性剂和表面活性剂/基于纳米颗粒的二氧化碳发泡体系的最新发展情况,重点介绍了CO2泡沫泄漏可能对环境造成的影响。所研究的大多数表面活性剂在油藏条件下不可能降解,并且它们的释放可能对野生动物造成严重的负面影响。随着近来添加剂使用(如非离子表面活性剂、纳米颗粒和其他化学品)的进展,可能不再允许使用苛刻的阴离子表面活性剂。本文讨论了生产泡沫系统的最新进展,并着重介绍了开发环境友好型CO2 EOR方法的可能策略。

关键词: 表面活性剂     纳米粒子     碳封存     提高石油采收率    

CO, N, and CO/N mixed gas injection for enhanced shale gas recovery and CO geological storage

《能源前沿(英文)》 2023年 第17卷 第3期   页码 428-445 doi: 10.1007/s11708-023-0865-9

摘要: In this work, using fractured shale cores, isothermal adsorption experiments and core flooding tests were conducted to investigate the performance of injecting different gases to enhance shale gas recovery and CO2 geological storage efficiency under real reservoir conditions. The adsorption process of shale to different gases was in agreement with the extended-Langmuir model, and the adsorption capacity of CO2 was the largest, followed by CH4, and that of N2 was the smallest of the three pure gases. In addition, when the CO2 concentration in the mixed gas exceeded 50%, the adsorption capacity of the mixed gas was greater than that of CH4, and had a strong competitive adsorption effect. For the core flooding tests, pure gas injection showed that the breakthrough time of CO2 was longer than that of N2, and the CH4 recovery factor at the breakthrough time (RCH4) was also higher than that of N2. The RCH4 of CO2 gas injection was approximately 44.09%, while the RCH4 of N2 was only 31.63%. For CO2/N2 mixed gas injection, with the increase of CO2 concentration, the RCH4 increased, and the RCH4 for mixed gas CO2/N2 = 8:2 was close to that of pure CO2, about 40.24%. Moreover, the breakthrough time of N2 in mixed gas was not much different from that when pure N2 was injected, while the breakthrough time of CO2 was prolonged, which indicated that with the increase of N2 concentration in the mixed gas, the breakthrough time of CO2 could be extended. Furthermore, an abnormal surge of N2 concentration in the produced gas was observed after N2 breakthrough. In regards to CO2 storage efficiency (Sstorage-CO2), as the CO2 concentration increased, Sstorage-CO2 also increased. The Sstorage-CO2 of the pure CO2 gas injection was about 35.96%, while for mixed gas CO2/N2 = 8:2, Sstorage-CO2 was about 32.28%.

关键词: shale gas     gas injection     competitive adsorption     enhanced shale gas recovery     CO2 geological storage    

干热岩辅助采油可行性研究

王学忠

《中国工程科学》 2011年 第13卷 第3期   页码 104-106

摘要:

为降低稠油热采成本,以燃烧原油生产蒸汽进行热力开采的开发方式需要改变,同时需要减少注入水对油层造成的冷伤害,因此开展了干热岩辅助采油可行性研究。干热岩辅助采油技术是利用干热岩抽取地下热能加热油层,以降低原油粘度、提高原油流动能力。在技术配套方面,无论钻深井,还是稠油热采技术,都是成熟的。干热岩的热能源于核幔边界的地热,分布广泛、清洁、可再生。研究表明,干热岩辅助采油技术针对性较强,是对现有蒸汽吞吐+蒸汽驱热采技术的有效继承,技术上具有可行性,并有可能推动相关技术的发展,符合中国节能减排的基本国策。建议在有利区块率先开展先导试验。

关键词: 干热岩辅助采油     冷伤害     热采稠油     热水驱     水热裂解    

Crosslinking acrylamide with EDTA-intercalated layered double hydroxide for enhanced recovery of Cr(VI

Jing Li, Haiqin Yu, Xue Zhang, Rixin Zhu, Liangguo Yan

《环境科学与工程前沿(英文)》 2020年 第14卷 第3期 doi: 10.1007/s11783-020-1229-x

摘要: Functional groups of AM and EDTA in composite increased removal of Cr(VI) and CR. Removal process reached equilibrium within 30 min and was minimally affected by pH. Elimination of Cr(VI) was promoted by coexisting CR. Adsorption process of CR was less influenced by the presence of Cr(VI). Mechanisms were electrostatic attraction, surface complexation and anion exchange. We prepared ethylenediaminetetraacetic acid (EDTA)-intercalated MgAl-layered double hydroxide (LDH-EDTA), then grafted acrylamide (AM) to the LDH-EDTA by a cross-linking method to yield a LDH-EDTA-AM composite; we then evaluated its adsorptive ability for Congo red (CR) and hexavalent chromium (Cr(VI)) in single and binary adsorption systems. The adsorption process on LDH-EDTA-AM for CR and Cr(VI) achieved equilibrium quickly, and the removal efficiencies were minimally affected by initial pH. The maximum uptake quantities of CR and Cr(VI) on LDH-EDTA-AM were 632.9 and 48.47 mg/g, respectively. In mixed systems, chromate removal was stimulated by the presence of CR, while the adsorption efficiency of CR was almost not influenced by coexisting Cr(VI). The mechanisms involved electrostatic attraction, surface complexation, and anion exchange for the adsorption of both hazardous pollutants. In the Cr(VI) adsorption process, reduction also took place. The removal efficiencies in real contaminated water were all higher than those in the laboratory solutions.

关键词: Chromate     Dye adsorption     Simultaneous removal     Cross-linking method     Amino functionalization    

Predicting the yield of pomegranate oil from supercritical extraction using artificial neural networks

J. Sargolzaei, A. Hedayati Moghaddam

《化学科学与工程前沿(英文)》 2013年 第7卷 第3期   页码 357-365 doi: 10.1007/s11705-013-1336-3

摘要: Various simulation tools were used to develop an effective intelligent system to predict the effects of temperature and pressure on an oil extraction yield. Pomegranate oil was extracted using a supercritical CO (SC-CO ) process. Several simulation systems including a back-propagation neural network (BPNN), a radial basis function neural network (RBFNN) and an adaptive-network-based fuzzy inference system (ANFIS) were tested and their results were compared to determine the best predictive model. The performance of these networks was evaluated using the coefficient of determination ( ) and the mean square error (MSE). The best correlation between the predicted and the experimental data was achieved using the BPNN method with an of 0.9948.

关键词: oil recovery     artificial intelligence     extraction     neural networks     supercritical extraction    

Enhanced methane recovery and exoelectrogen-methanogen evolution from low-strength wastewater in an up-flow

Zechong Guo, Lei Gao, Ling Wang, Wenzong Liu, Aijie Wang

《环境科学与工程前沿(英文)》 2018年 第12卷 第4期 doi: 10.1007/s11783-018-1074-3

摘要:

Methane yield increased 22 times from low-strength wastewater by applying conductive fillers.

Conductive fillers accelerated the start-up stage of anaerobic biofilm reactor.

Conductive fillers altered methanogens structure.

关键词: Low-strength wastewater     Methane production     Conductive filler     Microbial community structure    

Enhanced hydrogen production in microbial electrolysis through strategies of carbon recovery from alkaline

Ling Wang, Chunxue Yang, Sangeetha Thangavel, Zechong Guo, Chuan Chen, Aijie Wang, Wenzong Liu

《环境科学与工程前沿(英文)》 2021年 第15卷 第4期 doi: 10.1007/s11783-020-1348-4

摘要: Abstract • High hydrogen yield is recovered from thermal-alkaline pretreated sludge. • Separating SFL by centrifugation is better than filtration for hydrogen recovery. • The cascaded bioconversion of complex substrates in MECs are studied. • Energy and electron efficiency related to substrate conversion are evaluated. The aim of this study was to investigate the biohydrogen production from thermal (T), alkaline (A) or thermal-alkaline (TA) pretreated sludge fermentation liquid (SFL) in a microbial electrolysis cells (MECs) without buffer addition. Highest hydrogen yield of 36.87±4.36 mgH2/gVSS (0.026 m3/kg COD) was achieved in TA pretreated SFL separated by centrifugation, which was 5.12, 2.35 and 43.25 times higher than that of individual alkaline, thermal pretreatment and raw sludge, respectively. Separating SFL from sludge by centrifugation eliminated the negative effects of particulate matters, was more conducive for hydrogen production than filtration. The accumulated short chain fatty acid (SCFAs) after pretreatments were the main substrates for MEC hydrogen production. The maximum utilization ratio of acetic acid, propionic acid and n-butyric acid was 93.69%, 90.72% and 91.85%, respectively. These results revealed that pretreated WAS was highly efficient to stimulate the accumulation of SCFAs. And the characteristics and cascade bioconversion of complex substrates were the main factor that determined the energy efficiency and hydrogen conversion rate of MECs.

关键词: Waste activated sludge (WAS)     Short chain fatty acids (SCFAs)     Hydrogen     Pretreatment     Microbial electrolysis cells (MECs)    

Design and application of a novel coal-fired drum boiler using saline water in heavy oil recovery

Junping GU, Yuxin WU, Liping WU, Man ZHANG, Hairui YANG, Junfu LYU

《能源前沿(英文)》 2020年 第14卷 第4期   页码 715-725 doi: 10.1007/s11708-020-0690-3

摘要: In this paper, the design and operation of a novel coal-fired circulating fluidized bed (CFB) drum boiler that can generate superheated steam using saline water were introduced. The natural circulation water dynamics with a drum was adopted instead of the traditional once-through steam generator (OTSG) design, so that superheated steam can be generated for the better performance of the steam assisted gravity drainage (SAGD) technology in heavy oil recovery. The optimized staged evaporation method was proposed to further decrease the salinity of water in the clean water section of the boiler. The evaporating pipes of the salted water section were rearranged in the back pass of the boiler, where the heat load is low, to further improve the heat transfer safety. A CFB combustion technology was used for coal firing to achieve a uniform heat transfer condition with low heat flux. Pollutant control technologies were adopted to reduce pollutant emissions. Based on the field test, the recommended water standard for the coal-fired CFB drum boilers was determined. With the present technology, the treated recovery wastewater can be reused in steam-injection boilers to generate superheated steam. The engineering applications show that the boiler efficiency is higher than 90%, the blowdown rate is limited within 5.5%, and the superheat of steam can reach up to 30 K. Besides, the heavy oil recovery efficiency is significantly improved. Moreover, the pollutant emissions of SO , NO and dust are controlled within the ranges of 20–90 mg/(N·m ), 30–90 mg/(N·m ) and 2–10 mg/(N·m ) respectively.

关键词: drum steam injection boiler     natural circulation     recovery wastewater     staged evaporation     circulating fluidized bed (CFB)    

海上油田聚合物驱配套技术研究

刘宗昭,刘福海,易飞,黄波,孙艳萍,王成胜,刘敏

《中国工程科学》 2011年 第13卷 第5期   页码 50-52

摘要:

2002—2010年,经过8年攻关,研究建立了新型耐温、抗盐聚合物室内筛选及评价技术,海上油田聚合物驱开发方案设计和开发指标评价技术,适用于海上平台作业的注聚装备及工艺技术,分段防砂条件下大排量聚合物分段注入技术等10项聚合物驱配套技术,在渤海油田获得推广应用,取得了明显的增油降水效果。渤海油田聚合物驱矿场试验的成功实践证明:聚合物驱配套技术研究与建立是聚合物驱成功实施的基础,为海上油田高效开发做出了重大贡献。

关键词: 海上油田     聚合物驱     配套技术     提高采收率    

Tetrasphaera富集的强化生物除磷微生物组的时间动态和效能关联 Article

王慧, 王玉波, 张国庆, 赵泽, 鞠峰

《工程(英文)》 2023年 第29卷 第10期   页码 168-178 doi: 10.1016/j.eng.2022.10.016

摘要:

基于16S rRNA扩增子测序技术对全球污水处理厂(WWTP)强化生物除磷(EBPR)工艺中微生物群落的研究表明Tetrasphaera是丰度最高的聚磷菌(PAOs)。然而,目前对于Tetrasphaera 如何在 EBPR 中进行选择性富集尚不清楚。本文通过“自上而下”的方法利用复合碳源和低浓度烯丙基硫脲构建了Tetrasphaera富集的EBPR微生物组,其16S序列的丰度在第 113 天可达 40%。Tetrasphaera富集的微生物组具有高的营养物去除效率,可以实现约85% 的磷(P)去除和约80%的氮(N)去除,其污泥灰分中的P回收率相较于普通污水处理厂活性污泥提高了 23.2 倍。研究表明,添加1 mg·L−1 烯丙基硫脲同时促进了 Tetrasphaera PAOs 和 Microlunatus PAOs 的增加,并且显着降低了氨氧细菌Nitrosomonas和PAOs的潜在竞争者 Brevundimonas Paracoccus 的相对丰度,促进了 EBPR 微生物组的建立。16S rRNA 基因分析表明,体系中的EBPR-ASV0001与 Tetrasphaera japonica 的亲缘关系最为相近,其可能代表了一种新的PAOs。本研究为通过烯丙基硫脲促进Tetrasphaera富集的微生物组建立提供了新的认知,或可用于指导未来污水处理系统工艺的升级和优化,从而帮助实现高浓度废水的同步脱氮除磷。

关键词: 强化生物除磷(EBPR)     聚磷微生物 (PAOs)     Tetrasphaera     微生物组     磷回收    

Acidogenic sludge fermentation to recover soluble organics as the carbon source for denitrification in wastewater treatment: Comparison of sludge types

Lin Lin, Ying-yu Li, Xiao-yan Li

《环境科学与工程前沿(英文)》 2018年 第12卷 第4期 doi: 10.1007/s11783-018-1043-x

摘要:

CEPS sludge was compared with conventional primary and secondary sludge for the VFAs yield.

Fe-based CEPS sludge exhibited the highest efficiency of organic recovery.

Fermented CEPS sludge liquor provided a sufficient carbon source for denitrification.

99% of nitrate removal was achieved based on the Fe-CEPS and sludge fermentation.

关键词: Sewage sludge     Chemically enhanced primary sedimentation (CEPS)     Acidogenic fermentation     Organic carbon recovery     Nitrogen removal    

Improved resilience measure for component recovery priority in power grids

《工程管理前沿(英文)》 2021年 第8卷 第4期   页码 545-556 doi: 10.1007/s42524-021-0161-5

摘要: Given the complexity of power grids, the failure of any component may cause large-scale economic losses. Consequently, the quick recovery of power grids after disasters has become a new research direction. Considering the severity of power grid disasters, an improved power grid resilience measure and its corresponding importance measures are proposed. The recovery priority of failed components after a disaster is determined according to the influence of the failed components on the power grid resilience. Finally, based on the data from the 2019 Power Yearbook of each city in Shandong Province, China, the power grid resilience after a disaster is analyzed for two situations, namely, partial components failure and failure of all components. Result shows that the recovery priorities of components with different importance measures vary. The resilience evaluations under different repair conditions prove the feasibility of the proposed method.

关键词: resilience measure     power grid     importance measure     component recovery    

Technologies for pollutant removal and resource recovery from blackwater: a review

《环境科学与工程前沿(英文)》 2023年 第17卷 第7期 doi: 10.1007/s11783-023-1683-3

摘要:

● Blackwater is the main source of organics and nutrients in domestic wastewater.

关键词: Blackwater     Water-flushing toilet     Sanitation     Nutrient recovery     Water reuse     Sustainable development    

标题 作者 时间 类型 操作

A review on the application of nanofluids in enhanced oil recovery

期刊论文

pseudo-Janus silica/surfactant assembly and their application to stabilize Pickering emulsions and enhance oilrecovery

期刊论文

从绿色化学的角度提高石油采收率——通过二氧化碳泡沫进行封存

Jennifer A. Clark, Erik E. Santiso

期刊论文

CO, N, and CO/N mixed gas injection for enhanced shale gas recovery and CO geological storage

期刊论文

干热岩辅助采油可行性研究

王学忠

期刊论文

Crosslinking acrylamide with EDTA-intercalated layered double hydroxide for enhanced recovery of Cr(VI

Jing Li, Haiqin Yu, Xue Zhang, Rixin Zhu, Liangguo Yan

期刊论文

Predicting the yield of pomegranate oil from supercritical extraction using artificial neural networks

J. Sargolzaei, A. Hedayati Moghaddam

期刊论文

Enhanced methane recovery and exoelectrogen-methanogen evolution from low-strength wastewater in an up-flow

Zechong Guo, Lei Gao, Ling Wang, Wenzong Liu, Aijie Wang

期刊论文

Enhanced hydrogen production in microbial electrolysis through strategies of carbon recovery from alkaline

Ling Wang, Chunxue Yang, Sangeetha Thangavel, Zechong Guo, Chuan Chen, Aijie Wang, Wenzong Liu

期刊论文

Design and application of a novel coal-fired drum boiler using saline water in heavy oil recovery

Junping GU, Yuxin WU, Liping WU, Man ZHANG, Hairui YANG, Junfu LYU

期刊论文

海上油田聚合物驱配套技术研究

刘宗昭,刘福海,易飞,黄波,孙艳萍,王成胜,刘敏

期刊论文

Tetrasphaera富集的强化生物除磷微生物组的时间动态和效能关联

王慧, 王玉波, 张国庆, 赵泽, 鞠峰

期刊论文

Acidogenic sludge fermentation to recover soluble organics as the carbon source for denitrification in wastewater treatment: Comparison of sludge types

Lin Lin, Ying-yu Li, Xiao-yan Li

期刊论文

Improved resilience measure for component recovery priority in power grids

期刊论文

Technologies for pollutant removal and resource recovery from blackwater: a review

期刊论文