Geosystem Engineering最新文献_第10页

Synthesis of MWCNT@Ag and application of it for investigation of the nanofluids viscosity variation based on the 2-level factorial design 合成MWCNT@Ag及其在基于二级析因设计的纳米流体粘度变化研究中的应用

IF 1.7

Geosystem Engineering Pub Date : 2020-02-05 DOI: 10.1080/12269328.2020.1724201

Ali Koroushavi, Zakareya Hamad Allah Jashoei, S. Abbasi

{"title":"Synthesis of MWCNT@Ag and application of it for investigation of the nanofluids viscosity variation based on the 2-level factorial design","authors":"Ali Koroushavi, Zakareya Hamad Allah Jashoei, S. Abbasi","doi":"10.1080/12269328.2020.1724201","DOIUrl":"https://doi.org/10.1080/12269328.2020.1724201","url":null,"abstract":"ABSTRACT The viscosity of nanofluids is affected by several factors such as temperature and weight fraction. In this study, we investigate for the first time the effect of them on the viscosity of nanofluids containing MWCNTs-Ag, with different amount of Ag nanoparticles (MWAg-1 and MWAg-2) using 2-level factorial design. The results of FTIR and XRD analysis confirm the presence of synthesized Ag nanoparticles on the surface of MWCNTs. TEM results reveal that Ag nanoparticles can successfully introduce on the surface of oxidized MWCNTs. The results of the analysis of variance (ANOVA) confirm that both models are significant for viscosity prediction of nanofluids. Meanwhile, the results reveal that the temperature (40 and 70) and weight fraction (0.125 and 0.5) have a significant effect on the viscosity of MWAg-1 nanofluids. In addition, the results confirmed that the importance of temperature is more than the concentration of MWAg-1. The contribution percent of temperature and weight fraction reveals that the contribution of weight fraction (44.08) is higher than that of temperature (37.71°C) at the proposed model. However, in the MWAg-2 nanofluids, only the temperature has a significant effect on the viscosity. The F-values of model in MWAg-1and MWAg-2 nanofluids are 20.21 and 15.70, respectively.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"23 1","pages":"112 - 122"},"PeriodicalIF":1.7,"publicationDate":"2020-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2020.1724201","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47029834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Research on profile inversion controlling methods of multi-slug polymer alternative injection 多段塞聚合物交替注入剖面反演控制方法研究

IF 1.7

Geosystem Engineering Pub Date : 2020-01-29 DOI: 10.1080/12269328.2020.1713910

Ailing Zheng, DeHua Liu, Yanlin Shao

{"title":"Research on profile inversion controlling methods of multi-slug polymer alternative injection","authors":"Ailing Zheng, DeHua Liu, Yanlin Shao","doi":"10.1080/12269328.2020.1713910","DOIUrl":"https://doi.org/10.1080/12269328.2020.1713910","url":null,"abstract":"ABSTRACT The development practice of polymer flooding shows that the injection profile easily inverses during the process of single slug polymer flooding. The low effective or ineffective circulation of abundant injecting water in high permeability layer, low producing degree of low permeability layer and large polymer volume have influenced the sweep efficiency and oil recovery of polymer flooding. In view of these questions, the alternative injection method of various viscosity polymer slugs is studied. This paper explains the theory of enhanced oil recovery of multi-slug polymer alternative injection. The experiment results show that the alternative injection of high and low viscosity polymer slugs has a better effect than single slug polymer flooding. The mobility differences between high-low permeability layers can be effectively reduced. For a multi-layer heterogeneous reservoir, there is an optimal alternative cycle. Reasonable slug size can not only inhibit dominant channel forming in high permeability layer but also can effectively produce low permeability layer and control profile inversion to a certain extent. This provides a technical support for studying the controlling methods of profile inversion.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"23 1","pages":"100 - 92"},"PeriodicalIF":1.7,"publicationDate":"2020-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2020.1713910","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47251214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Optimization of lanthanum extraction in asymmetric rotation pilot plant column by using central composite methodology 中心复合法优化不对称旋转中试柱萃取镧

IF 1.7

Geosystem Engineering Pub Date : 2020-01-28 DOI: 10.1080/12269328.2020.1719905

M. Asadollahzadeh, R. Torkaman, M. Torab‐Mostaedi

{"title":"Optimization of lanthanum extraction in asymmetric rotation pilot plant column by using central composite methodology","authors":"M. Asadollahzadeh, R. Torkaman, M. Torab‐Mostaedi","doi":"10.1080/12269328.2020.1719905","DOIUrl":"https://doi.org/10.1080/12269328.2020.1719905","url":null,"abstract":"ABSTRACT The present work aimed to optimize the lanthanum extraction efficiency in the pilot-scale asymmetric rotating disc contactor. Optimal batch-scale extraction conditions were determined for the preparation of feed for extraction column (D2EHPA 0.08 mol/L; pH~8). In continuous mode, the optimization with the central composite design approach was performed by using three main parameters, such as continuous phase flow rate, agitation intensity, dispersed phase flow rate. Three responses studied were slip velocity, dispersed phase holdup, and extraction efficiency. The higher value of extraction efficiency for lanthanum extraction shows the main effect of agitation intensity on the dispersed phase holdup, slip velocity, and rate of mass transfer. The optimum conditions for extraction efficiency equal 98.5% were obtained at a rotation speed equal to 7.75 1/s, and phase flow rates equal to 1.25 × 10−5 m3/s. The new correlations are estimated to describe the holdup of the dispersed phase and the slip velocity with high accuracy and R-square values equal to 0.9734 and 0.9670, respectively. The results showed that the pilot plant asymmetric rotating disc column could be used as an appropriate column for the lanthanum extraction from aqueous solution as an example of rare earth metals.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"23 1","pages":"101 - 111"},"PeriodicalIF":1.7,"publicationDate":"2020-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2020.1719905","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43007212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Roasting of pyrophyllite for application in aluminoborosilicate glass production 叶蜡石焙烧在铝硼硅酸盐玻璃生产中的应用

IF 1.7

Geosystem Engineering Pub Date : 2020-01-24 DOI: 10.1080/12269328.2020.1719904

Joobeom Seo, Sangbae Kim, I. Bae, W. Kim

{"title":"Roasting of pyrophyllite for application in aluminoborosilicate glass production","authors":"Joobeom Seo, Sangbae Kim, I. Bae, W. Kim","doi":"10.1080/12269328.2020.1719904","DOIUrl":"https://doi.org/10.1080/12269328.2020.1719904","url":null,"abstract":"ABSTRACT Pyrophyllite, an aluminum silicate mineral, was used as a raw material for the production of aluminoborosilicate glass. For the application of pyrophyllite to the glass manufacturing process as a raw material, the particle size distribution of the powder must the following requirements: 150–45 μm ≥ 60 mass% and below 45 μm ≤ 40 mass%. Hence, an attempt was made to develop the technology for pyrophyllite to produce a powder that meets these requirements through understanding the crushing characteristics. Roasting of pyrophyllite at 1150 °C resulted in the alternation of raw pyrophyllite and led to differences in the crushing characteristics. Crushing of the roasted pyrophyllite produced a powder with a reduction in the amount of the fine particles (−45 μm) compared to the powder of the raw pyrophyllite under identical crushing condition. This difference is attributed to the alternation of the raw pyrophyllite after the roasting process, as confirmed by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) results as well as by the amount of water adsorption. The melting characteristics of the raw and roasted pyrophyllite samples were investigated for application to the aluminumborosilicate glass production. The glass products are characterized as colorless and in an amorphous phase.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"23 1","pages":"123 - 130"},"PeriodicalIF":1.7,"publicationDate":"2020-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2020.1719904","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41574642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A Model For Fractured Well Performance Coupled WithComplex Seepage Mechanism in Shale Gas 考虑复杂渗流机制的页岩气压裂井动态模型

IF 1.7

Geosystem Engineering Pub Date : 2020-01-20 DOI: 10.1080/12269328.2020.1713912

Yan Xun, Sun Jing, Liu De-hua

{"title":"A Model For Fractured Well Performance Coupled WithComplex Seepage Mechanism in Shale Gas","authors":"Yan Xun, Sun Jing, Liu De-hua","doi":"10.1080/12269328.2020.1713912","DOIUrl":"https://doi.org/10.1080/12269328.2020.1713912","url":null,"abstract":"ABSTRACT Hydraulic fracture is a key technology for high-efficiency development of shale gas, and the flow mechanism of fractured well with Stimulated Reservoir Volume (SRV) is complex in shale gas. In this paper, an apparent permeability model is proposed, which can not only reflect the multi-scale flow characteristics in shale gas but also characterize the variation of permeability with effective stress. In addition, a composite model for a fractured well with SRV is established, which comprises multiscale, geomechanics and adsorption phenomenon. The object of this paper is to investigate some important impacts on a fractured well with SRV. The results reveal that the cumulative gas production will decrease sharply when the shale gas reservoir stress-sensitive coefficient increases. Additionally, the gas production rate and cumulative gas production will increase with the increase of SRV permeability. And, the adsorption phenomenon has an influence on shale gas seepage and sorption capacity, the larger Langmuir volume, the richer adsorption gas content in shale gas. And, more adsorbed gas will be exploited into free gas, which slows down the production decline of gas wells. The production of gas well will increase with the increase of perforation thickness of gas reservoir.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"23 1","pages":"174 - 182"},"PeriodicalIF":1.7,"publicationDate":"2020-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2020.1713912","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42909756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Calcined low-grade multimineral clays as supplementary cementitious materials: a feasibility study 煅烧低品位多矿物粘土作为辅助胶凝材料的可行性研究

IF 1.7

Geosystem Engineering Pub Date : 2020-01-10 DOI: 10.1080/12269328.2020.1713911

N. Rakhimova, R. Rakhimov, Artur R. Bikmukhametov, V. Morozov, A. Eskin, A. Gubaidullina

引用次数: 4

An investigation into the recovery of oxide copper from a complex copper ore using sulphidisation technique and hydroxamate and potassium amyl xanthate collectors 采用硫化技术和羟肟酸盐和戊基黄药钾捕收剂回收某复杂铜矿中的氧化铜的研究

IF 1.7

Geosystem Engineering Pub Date : 2020-01-02 DOI: 10.1080/12269328.2019.1695679

A. Zare, Asghar Azizi, M. Karamoozian

{"title":"An investigation into the recovery of oxide copper from a complex copper ore using sulphidisation technique and hydroxamate and potassium amyl xanthate collectors","authors":"A. Zare, Asghar Azizi, M. Karamoozian","doi":"10.1080/12269328.2019.1695679","DOIUrl":"https://doi.org/10.1080/12269328.2019.1695679","url":null,"abstract":"ABSTRACT This study was aimed to increase the floatability of oxide copper from a complex copper sample. For this purpose, sulphidisation processes such as slug and controlled potential sulphidisation (CPS) and hydroxamate and potassium amyl xanthate (Z6) collectors were utilized and their results were compared with real conditions. The results indicated that about 9.46% of the recovery of oxide copper increased using 300g/t ammonium sulphide in the first step, and reached to 77.12%. Also, in this case, the recovery of sulphide copper was significantly improved. In addition, the findings demonstrated that applying 10 g/t of potassium octyl hydroxamate anionic collector, the recovery of oxide copper reached to 74.47% without any negative effect on the recovery of sulphide copper. Meanwhile, the simultaneous use of Z11 and Z6 as collector caused to increase about 3.63% of the recovery of oxide copper (71.29%). It was also found that the highest recovery of oxide copper could be obtained using CPS method and in this case, 10.34% of the oxide copper and 4.48% of the total copper improved and also the dosage of (NH4)2S decreased.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"23 1","pages":"43 - 50"},"PeriodicalIF":1.7,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2019.1695679","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42419893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Stable SiO2–TiO2 composite-based nanofluid of improved rheological behaviour for high-temperature oilfield applications 用于高温油田应用的具有改进流变性能的稳定SiO2–TiO2复合材料纳米流体

IF 1.7

Geosystem Engineering Pub Date : 2020-01-02 DOI: 10.1080/12269328.2020.1713909

R. Kumar, Tushar Sharma

{"title":"Stable SiO2–TiO2 composite-based nanofluid of improved rheological behaviour for high-temperature oilfield applications","authors":"R. Kumar, Tushar Sharma","doi":"10.1080/12269328.2020.1713909","DOIUrl":"https://doi.org/10.1080/12269328.2020.1713909","url":null,"abstract":"ABSTRACT Nanofluid synthesis in pure water is associated with premature settlement resulting in least dispersion stability. Therefore, in this study, polyacrylamide (PAM) is used as viscosity enhancer to improve dispersion stability of nanofluid stabilized by composites of silica and titania. Different techniques such as dynamic light scattering measurements, electrical conductivity, scanning electron microscopy, and rheological studies are used to support the analysis. The use of silica and titania nanoparticles together with PAM has additional advantage over particle agglomeration, and thus, the dispersion stability improved. Further, nanofluid stabilized by composites of silica and titania was tested for rheological measurements at 90°C to find nanotechnology applicability in high-temperature applications. The shear-thinning behaviour of nanofluids at high temperature (90°C) was least affected by shear deformation and reduced to 0.48 mPa.s at higher shear rate (4200 s−1), while shear thinning of PAM solution seriously varied with increasing shear deformation and takes the edge of 0.0005 mPa.s at higher shear rate (4200 s−1). In addition, the thermal stability of nanofluids was better due to slight decrease in viscosity with increasing temperature, which makes them suitable to be utilized at high-temperature applications in widespread industrial areas including oilfield where the temperature becomes a major factor.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"23 1","pages":"51 - 61"},"PeriodicalIF":1.7,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2020.1713909","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46177742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Experimental investigation on the contribution of gas molecular diffusion to gas mass flux in micro-nano pores 气体分子扩散对微纳孔中气体质量流量贡献的实验研究

IF 1.7

Geosystem Engineering Pub Date : 2020-01-02 DOI: 10.1080/12269328.2019.1655487

Jing Sun, DeHua Liu, Xiang Zhu, Wenjun Huang, Liang Cheng

{"title":"Experimental investigation on the contribution of gas molecular diffusion to gas mass flux in micro-nano pores","authors":"Jing Sun, DeHua Liu, Xiang Zhu, Wenjun Huang, Liang Cheng","doi":"10.1080/12269328.2019.1655487","DOIUrl":"https://doi.org/10.1080/12269328.2019.1655487","url":null,"abstract":"ABSTRACT The mass transfer from the matrix to the fracture face is driven by both concentration and pressure differences. In this work, high-temperature high-pressure (HPHT) systems for diffusion experiments with only concentration differences were used to determine the diffusion coefficient, and flow experiments with only pressure differences were also conducted; and the magnitude of gas molecular diffusion and its contribution to production were analyzed in this study. The results show as follows: (1) Gas flow from the matrix to the fracture system is driven by the combined effect of gas molecular diffusion and seepage. The pore structure characteristics of the reservoir and the contribution of the diffusion to the yield can vary greatly. (2) In tight reservoirs with an average permeability of 0.3067 mD, the contribution of gas molecular diffusion to the total gas mass flux is only 0.08%, while in shale reservoirs, the average permeability is 0.0015 mD; the contribution of diffusion to the total gas mass flux could be as large as 1%. (3) The contribution of molecular diffusion to gas production is closely related to the pore sizes of the porous medium. The smaller the pore sizes are, the greater the contribution of molecular diffusion to gas production.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"23 1","pages":"26 - 36"},"PeriodicalIF":1.7,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2019.1655487","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47381782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Forecasting LNG prices with the kernel vector autoregressive model 用核向量自回归模型预测LNG价格

IF 1.7

Geosystem Engineering Pub Date : 2020-01-02 DOI: 10.1080/12269328.2019.1664337

J. Shim, Hong Chong Cho

引用次数: 1