Geosystem Engineering最新文献_第9页

Analysis of kinetic models for chalcopyrite flotation: effect of operating parameters 黄铜矿浮选动力学模型分析:操作参数的影响

IF 1.7

Geosystem Engineering Pub Date : 2019-09-03 DOI: 10.1080/12269328.2018.1560367

M. Asghari, Omid Salmani Nuri, E. Allahkarami

{"title":"Analysis of kinetic models for chalcopyrite flotation: effect of operating parameters","authors":"M. Asghari, Omid Salmani Nuri, E. Allahkarami","doi":"10.1080/12269328.2018.1560367","DOIUrl":"https://doi.org/10.1080/12269328.2018.1560367","url":null,"abstract":"ABSTRACT In this research, the influence of pH, particle size, the type of collector and frother and their concentration was studied on the flotation kinetic parameters, rate constant and ultimate recovery. In this regard, three different kinetic flotation models such as Classical model, Klimpel model, and fully mixed reactor model were applied to evaluate the batch flotation results. The results showed that the fully mixed reactor model gave the best fit to the experimental data. In the second stage, variation of flotation rate constants and ultimate recoveries are investigated with respect to particle size and chemical conditions. It was found that the rate constant (k) and ultimate recovery () were strongly dependent on pH and types of collector and their frother and dosages. It was also observed that best values of , K, separation efficiency, and selectivity index are obtained in the presence of a mixture of isopropyl-n-ethyl thionocarbamate (C4132) and Flomin C7240 (a mixture of 10–20 wt% sodium alkyl dithiophosphate and 20–30 wt% sodium mercaptobenzothiozole) as the collector and a mixture of polypropylene glycol (A65) and methyl isobutyl carbinol as the frother and dosages of 40 g/ton for both reagents, respectively.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"22 1","pages":"263 - 270"},"PeriodicalIF":1.7,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2018.1560367","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43039305","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

The application of modified isochronal well test in a low-permeability condensate gas field 改进等时试井技术在某低渗透凝析气田的应用

IF 1.7

Geosystem Engineering Pub Date : 2019-07-20 DOI: 10.1080/12269328.2019.1644204

Zhaoliang Zhou, Xiu-qin Wang, Xue Miao, Kangning Qian, Lijian Li, P. Xu, Xiuqin Lu

引用次数: 0

The lead recovery prediction from lead concentrate by an artificial neural network and particle swarm optimization 基于人工神经网络和粒子群优化的铅精矿铅回收率预测

IF 1.7

Geosystem Engineering Pub Date : 2019-07-18 DOI: 10.1080/12269328.2019.1644205

Arash Sobouti, F. S. Hoseinian, B. Rezai, S. Jalili

引用次数: 9

Determination of pore types in coquinas carbonates and their effects on formation factors and porosity exponents 柯奎纳碳酸盐岩孔隙类型的测定及其对地层因素和孔隙度指数的影响

IF 1.7

Geosystem Engineering Pub Date : 2019-05-22 DOI: 10.1080/12269328.2019.1609378

Haitao Wang

{"title":"Determination of pore types in coquinas carbonates and their effects on formation factors and porosity exponents","authors":"Haitao Wang","doi":"10.1080/12269328.2019.1609378","DOIUrl":"https://doi.org/10.1080/12269328.2019.1609378","url":null,"abstract":"ABSTRACT Calculation of the saturation of carbonates with various pore types and complicated pore structures in electrical resistivity models requires data on pore types and their effects on electrical resistivity. Therefore, the objectives are to determine the pore types and to investigate their effects on electrical resistivity. The pore types of three coquinas samples were determined by the distributions of experimental porosities and porosity exponents in the cross-plot of the dual porosity model and pore visualization from X-ray computerized tomography. A process-based method was applied to reconstruct the pore-scale models with different pore types. Their pore networks and electrical resistivity were extracted and calculated by the maximal ball and finite element methods, respectively. Fracture reduced the formation factor and porosity exponent. Connected vug increased the pore space that swept by the electrical current to reduce the formation factor while increasing the porosity exponent. Isolated vug undermined the pore space to increase the formation factor and porosity exponent. The effects of the tiny vug were much more obvious than the effects of the large one. This investigation will help to classify the pore types and propose electrical resistivity models that correspond to specific pore types and vug sizes in carbonate reservoirs.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"24 1","pages":"31 - 45"},"PeriodicalIF":1.7,"publicationDate":"2019-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2019.1609378","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48682116","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: 0

Influencing factor analysis of water invasion in condensate gas reservoir with bottom water based on fuzzy comprehensive evaluation and orthogonal experiment 基于模糊综合评判和正交试验的底水凝析气藏侵水影响因素分析

IF 1.7

Geosystem Engineering Pub Date : 2019-04-22 DOI: 10.1080/12269328.2019.1605942

Wende Yan, Zhilin Qi, Yingzhong Yuan, Xiaoliang Huang, Jiqiang Li

{"title":"Influencing factor analysis of water invasion in condensate gas reservoir with bottom water based on fuzzy comprehensive evaluation and orthogonal experiment","authors":"Wende Yan, Zhilin Qi, Yingzhong Yuan, Xiaoliang Huang, Jiqiang Li","doi":"10.1080/12269328.2019.1605942","DOIUrl":"https://doi.org/10.1080/12269328.2019.1605942","url":null,"abstract":"ABSTRACT Condensate oil and water invasion coexist in the condensate gas reservoir with bottom water. Because of influences of condensate oil pollution and water invasion, gas recovery obviously decreases. There are many factors influencing water invasion in a condensate gas reservoir with bottom water, including static petrophysical properties and dynamic operational conditions. Various factors play different roles in the process of water invasion, and the comprehensive effects of them on water invasion are difficult to be determined because these factors interfere with each other. With gas reservoir engineering method and numerical simulation technology, the factors including acuifer size, height of water avoidance, permeability, effective gas pay thickness, condensate oil saturation and gas well production rate on water invasion are researched. Water breakthrough time, stable production period and gas recovery are calculated for different cases under different parameter combinations through fuzzy comprehensive evaluation and orthogonal experiment design. Then sensitivities of these factors are analyzed and main factors influencing water invasion are selected and sequenced. The research supply theoretical basis for preventing and controlling water invasion thus improves development effect of condensate gas reservoir with bottom water.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"22 1","pages":"299 - 309"},"PeriodicalIF":1.7,"publicationDate":"2019-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2019.1605942","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43341887","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: 4

Biomarker gradients of super-viscous oil as an estimation method of oil-water distribution 超粘稠油生物标志物梯度作为油水分布估计方法

IF 1.7

Geosystem Engineering Pub Date : 2019-04-15 DOI: 10.1080/12269328.2019.1603124

A. Chemodanov, V. Sudakov, Rinat K. Khayrtdinov, R. Safina

引用次数: 1

Analysis on the safe distance between shield tunnel through sand stratum and underlying karst cave 沙层盾构隧道与下伏溶洞安全距离分析

IF 1.7

Geosystem Engineering Pub Date : 2019-03-04 DOI: 10.1080/12269328.2018.1475265

Wei Wang, Shi-ming Gao, Lingfeng Liu, Wushuang Wen, Ping Li, Jianping Chen

{"title":"Analysis on the safe distance between shield tunnel through sand stratum and underlying karst cave","authors":"Wei Wang, Shi-ming Gao, Lingfeng Liu, Wushuang Wen, Ping Li, Jianping Chen","doi":"10.1080/12269328.2018.1475265","DOIUrl":"https://doi.org/10.1080/12269328.2018.1475265","url":null,"abstract":"ABSTRACT When a subway tunnel passes through a karst geological area, in order to ensure the stability of the tunnel, the safe distance between the tunnel and karst cave needs to be researched. This article is based on the construction project of Wuhan metro line 6 from Qianjincun station to Mayinglu station. In view of the geological condition of overlying sand and underlying limestone, by using numerical simulation and theoretical calculation and selecting a characteristic section, the influence law and degree of karst cave span, height-span ratio, and filling degree on the safe thickness of karst cave roof are studied and a forecasting model of the safe thickness of karst cave roof is established. Combined with dichotomy and numerical simulation, the critical horizontal safe distance beyond which cave collapse does not cause tunnel instability is calculated. The results show that: (1) the safe thickness of karst cave roof increases linearly with the increase of karst cave span, and decreases with the increase of height-span ratio and filling degree; (2) among the three factors, the effect of karst cave span is the most significant, the filling degree of karst cave is the second, and the influence of height-span ratio of karst cave is the weakest; (3) the proposed forecasting model passes the significance test, indicating that the model is very reasonable; and (4) the critical horizontal safe distance from the tunnel border to the karst cave boundary is 22.4 m. The research results can provide guidance for the design and construction of shield tunnels and karst cave treatment in karst areas.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"22 1","pages":"81 - 90"},"PeriodicalIF":1.7,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2018.1475265","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44716767","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: 16

Optimization of Ni(II) & Co(II) removal from wastewater and statistical studies on the results of experimental designs 废水中Ni(II)和Co(II)去除的优化及实验设计结果的统计研究

IF 1.7

Geosystem Engineering Pub Date : 2019-03-04 DOI: 10.1080/12269328.2018.1477072

Aghil Igder, A. Fazlavi, E. Allahkarami, A. Dehghanipour

{"title":"Optimization of Ni(II) & Co(II) removal from wastewater and statistical studies on the results of experimental designs","authors":"Aghil Igder, A. Fazlavi, E. Allahkarami, A. Dehghanipour","doi":"10.1080/12269328.2018.1477072","DOIUrl":"https://doi.org/10.1080/12269328.2018.1477072","url":null,"abstract":"ABSTRACT In this study, mono-dispersed carboxymethyl chitosan (CCS)-bounded Fe3O4 (OCMCS/Fe3O4) nanoparticles were used as a novel magnetic nano-adsorbent for the removal of Ni(II) and Co(II) ions from wastewater. Chitosan (CS) was first carboxymethylated and then covalently bounded on the surface of Fe3O4 nanoparticles. The micrographs of the scanning electron microscopy analysis showed that the nanoparticles were mono-dispersed and had spherical morphology with mean diameter of 33 nm. X-ray diffraction patterns indicated that the magnetic nanoparticles were pure Fe3O4 with a spinel structure, and the binding of O-CCS did not change the phase of Fe3O4. In this study, the most significant factors affecting adsorption process, i.e., pH, adsorbent dosage, contact time and concentration of Ni(II) and Co(II) ions were studied. Box–Behnken design and analysis of variance were used to determine the main effects and their interactions. The optimization study revealed that pH, adsorbent dosage and metal concentration had a significant effect on metal removal. In addition, results indicated that contact time parameter had no significant effect on the removal of Ni(II) and Co(II) ions (p-value > 0.01).","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"22 1","pages":"100 - 91"},"PeriodicalIF":1.7,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2018.1477072","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41328222","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: 14

Assessing the physical, mechanical properties, and γ-ray attenuation of heavy density concrete for radiation shielding purposes 辐射屏蔽用高密度混凝土的物理、机械性能和γ射线衰减评估

IF 1.7

Geosystem Engineering Pub Date : 2019-03-04 DOI: 10.1080/12269328.2018.1469434

A. Ouda, H. Abdelgader

{"title":"Assessing the physical, mechanical properties, and γ-ray attenuation of heavy density concrete for radiation shielding purposes","authors":"A. Ouda, H. Abdelgader","doi":"10.1080/12269328.2018.1469434","DOIUrl":"https://doi.org/10.1080/12269328.2018.1469434","url":null,"abstract":"Abstract The main purpose of this research is to improve the shielding of gamma rays by developing special concrete with high physico-mechanical properties using local aggregates. Various concrete mixtures are designed using heavy fine aggregate as a substitute for normal fine aggregate at rates of 20, 40, 60, 80, and 100%, by weight. Other concrete mixtures have been designed by replacing coarse aggregate with 50 and 60% of heavy fine aggregate. The properties such as density, compressive strength, and tensile strength of hardened mixtures were studied. Gamma ray attenuation has been studied on concrete mixtures after exposure to utilized radiation source comprised 137Cs radioactive element with photon energy of 0.662 MeV. From the results, we concluded that the density and compressive strength in addition to the linear attenuation coefficient of hardened mixtures increased with the ratio of replacing normal aggregate with heavy aggregate up to 60%. With an increase of the ratio more than 60%, compressive strength and tensile strength were reduced with the continued increase in density. On the other hand, density and the linear attenuation coefficient increased with the replacement of coarse aggregate by 50 and 60% of the heavy fine aggregate; while both compressive strength and tensile strength decreased.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"22 1","pages":"72 - 80"},"PeriodicalIF":1.7,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2018.1469434","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46711738","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: 19

Analysis of deliverability data in shale gas reservoirs: pseudo-pressure and pressure employed 页岩气藏产能数据分析：拟压力和压力法

IF 1.7

Geosystem Engineering Pub Date : 2019-03-01 DOI: 10.1080/12269328.2019.1583138

Chaojie Zhao, Jun Li, Hui Zhang

{"title":"Analysis of deliverability data in shale gas reservoirs: pseudo-pressure and pressure employed","authors":"Chaojie Zhao, Jun Li, Hui Zhang","doi":"10.1080/12269328.2019.1583138","DOIUrl":"https://doi.org/10.1080/12269328.2019.1583138","url":null,"abstract":"ABSTRACT Forecasting deliverability in shale gas reservoirs accurately has received much attention in the industry in recent years. Most wells in shale gas reservoirs are horizontal with multiple fractures, and it has been widely recognized that the dominant early flow regime is usually long-duration transient flow. The most popular method for analyzing linear flow is the plot of rate-normalized pressure versus square root of time, where the pseudo-pressure is employed for gas. However, the pseudo-pressure employed approach is difficult to handle by hand than the pressure employed approach. The purpose of this work is to evaluate the accuracy of pseudo-pressure employed method for analyzing gas rate in shale gas reservoirs, and establish which method is the most simple and accurate for reserve estimation. Based on a number of numerically simulated cases, comparisons between the pseudo-pressure and pressure employed methods for estimating gas rate are made. It is shown that the pressure employed method yields the gas rate that not quite accurately match the simulated values, however, as the same general parameters, the pseudo-pressure employed method really does not improve this inaccuracy. Accordingly, the pressure employed approach is a good and simple method for forecasting gas rate. In addition, depending on the simple hand method, a modification approach is proposed by incorporating constant factors to forecast the gas rate with more confidence. This work will provide an efficient guidance to assist analysts in evaluating hydrocarbon deliverability rapidly and efficiently in shale gas reservoirs.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":"22 1","pages":"225 - 231"},"PeriodicalIF":1.7,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12269328.2019.1583138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42137397","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