Geosystem Engineering最新文献

{"title":"Role of diffusion osmosis on the mechanical and petrophysical alterations of shale when interacting with aqueous solutions","authors":"Hawra Al-Sarraf, Talal Albazali, A. Garrouch","doi":"10.1080/12269328.2022.2081623","DOIUrl":"https://doi.org/10.1080/12269328.2022.2081623","url":null,"abstract":"ABSTRACT Several experimental procedures were employed to investigate the impact of salt type and concentration on shale’s effective porosity and compressive strength. The use of a special gravimetric technique made it possible to quantify water and ion transport into shale when interacting with NaCl, KCl, and CaCl2 solutions. Results showed an increase in shale’s effective porosity when dilute solutions (less than 5% w/w) interacted with shale. On the other hand, a decrease in shale’s effective porosity was observed when the concentration of salt increased to 10%, 15% and 20% w/w. It is argued that the increase in porosity at low salt concentrations was due to cementation degradation caused by ionic invasion without loss of grain cohesion and mechanical stability. Decrease in porosity when higher concentrations of salts were used was apparently due to loss of grain cohesion and pore structure integrity caused by the combined effects of ionic diffusion and diffusion osmosis. These observations were confirmed by shale’s compressive strength measurements. The results showed a negligible change in compressive strength of shale when it interacted with 5% NaCl, KCl, and CaCl2 solutions. In contrast, a considerable reduction in shale’s compressive strength was recorded for higher salt concentrations (10%, 15% and 20% w/w).","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47309633","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}

{"title":"The key challenges towards the effective implementation of digital transformation in the mining industry","authors":"W. Abdellah, Jong-Gwan Kim, M. Hassan, Mahrous A. M. Ali","doi":"10.1080/12269328.2022.2120093","DOIUrl":"https://doi.org/10.1080/12269328.2022.2120093","url":null,"abstract":"ABSTRACT Digital transformation (DT) is defined as a strategy for boosting mining assets by attempting significant changes to of own properties through the integration of communication, data computing, and property technologies. Making large-scale changes will be difficult with digital technology, especially if the business is not well-positioned to do so. Increasing cybersecurity protection levels is the most effective way to ensure the success of the transformation. When making significant changes, a clear digital vision should be outlined and implemented with strong leadership. However, the majority of digital transformation initiatives fail before they are completed. The problem does not just affect the mining industry. The purpose of this paper is to investigate the major challenges encountered in digital transformation projects and to propose a strategic solution for implementing and scaling digital initiatives.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44670609","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}

{"title":"An analysis of Cambodia’s policy-maker’s acceptance of renewable and nuclear energy","authors":"Soohyeon Kim, Inkyung Cho, Surim Oh, Eunnyeong Heo","doi":"10.1080/12269328.2022.2108511","DOIUrl":"https://doi.org/10.1080/12269328.2022.2108511","url":null,"abstract":"ABSTRACT In recent years, the Cambodian government has been promoting clean energy sources, making it essential to understand better the entry/barrier conditions for greater utilisation of renewable and nuclear power. Accordingly, this study aims to analyse the potential for expanding renewable and nuclear energy use in Cambodia. To derive practical recommendations for the political sector, we surveyed officials from the government and various institutions. Specifically, we measured Cambodia’s acceptance of renewable and nuclear energy, derived entry/barrier conditions, and identified the decision-making priorities of the government in introducing and expanding each energy source. The analysis employed the ordered logit-probit analysis and analytic hierarchy process (AHP). This study provides a practical guide for the Cambodian government, and investors and partners who intend to contribute to the renewable and nuclear systems of the country: renewable energy requires strategies maximising the economic benefits of its rich potential; while nuclear generation needs broad economic and technological cooperation with foreign governments and companies, and preparation for socio-political instability.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48848572","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}

{"title":"Mineralogy of beach sand in Jumundo, Korea and recovery of heavy minerals using Humphreys spiral concentrator and shaking table followed by magnetic separation process","authors":"Hee-Young Shin, S. Chae, Kyoungkeun Yoo","doi":"10.1080/12269328.2022.2074150","DOIUrl":"https://doi.org/10.1080/12269328.2022.2074150","url":null,"abstract":"ABSTRACT The mineralogy of beach sand, which was sampled from an island, Jumundo of South Korea, was investigated and beneficiated using gravity and magnetic separation processes. Ilmenite was determined to be a major heavy mineral and, as minor heavy minerals, zircon, monazite, and sphene were observed. Quartz, biotite, microcline, kaolinite, hornblende, and chlorite were present as gangue minerals. The Ilmenite was concentrated with a Humphrey spiral concentrator and shaking table followed by magnetic separators (drum and cross belt types). As a final product, 18% of the Humphrey spiral system concentrate was recovered, and the grade of final product was determined to be 93% ilmenite. The electron probe microscope analysis indicates that ilmenite was a solid solution of major FeTiO3, minor MgTiO3 (geikielite), and MnTiO3 (pyrophanite).","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47337520","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}

{"title":"Perspectives on the concepts of futuristic mineral concentration using microscopic robots","authors":"A. Gomez-Flores, Hyunjung Kim","doi":"10.1080/12269328.2022.2074149","DOIUrl":"https://doi.org/10.1080/12269328.2022.2074149","url":null,"abstract":"ABSTRACT There are technologies to fabricate microscopic (milli, micro, and nano) robots at present, and although their large−scale applications in the field of science remain under development, the technology progress is promising. Thus, we review the advances in the technology to fabricate microscopic robots and explore the concepts of their application in mineral concentration. Microscopic robots have not been applied yet in unit operations for mineral concentration. Nevertheless, it is envisioned that the ultimate implementation of microscopic robots for mineral concentration should occur in the form of hand sorting. Additionally, possible limitations (e.g., mass−production or computational power) of the concept are provided. Based on our review, we concluded that the reality of this application will not be accomplished soon. This short perspective could be used as a reference for future proof of concept in experimental work.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49555929","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}

{"title":"Research and practice on oil displacement law of different well pattern in offshore oilfield","authors":"Peng Wang, S. Wang, Hongyou Zhang, Guangyi Sun, Shangqi Zhai, Huijiang Chang, Chengli Zhang","doi":"10.1080/12269328.2022.2054865","DOIUrl":"https://doi.org/10.1080/12269328.2022.2054865","url":null,"abstract":"ABSTRACT BZ oilfield is the first oilfield successfully developed with large-scale horizontal well pattern in Bohai sea. In order to study the well pattern suitable for offshore fluvial sedimentary oilfield, based on the characteristics of offshore oilfield, such as large well spacing, few wells and complex well pattern, the authors designed a set of heterogeneous reservoir models under the guidance of similarity theory. The different well patterns, different displacement rates and different heterogeneity were simulated. The different displacement effects were studied by measuring the electrical characteristics, injection volume, oil production and water production of the model. It is found that the horizontal well pattern is used for low-speed development, the water breakthrough of oil wells is slow in the relatively homogeneous reservoir. In the heterogeneous high permeability reservoir(Jk = 4), the oilfield adopts low-speed development by using staggered well pattern, the water breakthrough of the oil well is slow, and the EOR is large. In the heterogeneous high permeability reservoir(Jk = 6), the oilfield adopts the combined well pattern for low-speed development, the EOR is large. This study deepens the understanding of the development law of horizontal well pattern and the distribution law of remaining oil, and provides a basis for oilfield development and adjustment.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46286571","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}

{"title":"The effect of ultrasound on the sulfuric acid leaching of uranium by use of MnO2 as a oxidant","authors":"K. Chung, Ho-Sung Yoon, Chul-Joo Kim, Hoseok Jeon","doi":"10.1080/12269328.2022.2074148","DOIUrl":"https://doi.org/10.1080/12269328.2022.2074148","url":null,"abstract":"ABSTRACT The paper reported sonochemical leaching of uranium from black shale in Fe2+-containing sulfuric acid solution of pH 2 using MnO2 as an oxidant. Ultrasound enhanced uranium leaching at the initial time but suppressed it over a prolonged time. In addition, the amount of MnO2-input was increased for ultrasonic leaching than conventional leaching at the same time. It was understood that ultrasonic leaching conditions should be optimized to achieve a positive effect. Faster leaching of uranium and reduced consumption of MnO2 could be found under the optimum condition of leaching up to ca. 85% at the sonication power of 25 W.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42856064","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}

{"title":"Feasibility of pilot-scale disc-donut column for continuous cadmium extraction with the perspective of droplet size distribution","authors":"M. Asadollahzadeh, R. Torkaman, M. Torab‐Mostaedi, A. Heydari","doi":"10.1080/12269328.2021.2008274","DOIUrl":"https://doi.org/10.1080/12269328.2021.2008274","url":null,"abstract":"ABSTRACT Heavy metal removal is a significant problem in various industries. Liquid-liquid extraction is a practical process in recovering these elements. In this study, the behavior of pilot-scale disc-donut column in the extraction of cadmium ions was evaluated. The effects of droplets with the variation size distributions are significant in describing performance and characteristics of an extractor for removing the substrate from aqueous or organic phases. The size distribution of droplets is relative to the interfacial area under steady conditions. To match the size distribution of droplets, the experiments are carried out in reaction and non-reaction conditions. In emulsion regime (pulsing intensity (Af), inlet organic and aqueous phase flow rate (Vc, Vd) equal to 3.3 cm/s, 2.22 mm/s, and 2.22 mm/s, respectively) and under the optimized conditions, 99.7% of the cadmium can be recovered from the aqueous solution. It was found that Weibull distribution gives the best fit at each operation mode while inverse Gaussian distribution gives the most inferior fit. According to a series of statistical analyses, it is shown that the pulsation intensity imposed more influence on drop sizes, and superficial flow rates of both phases are less able to the successful prediction of size distribution of droplets.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42204268","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}

{"title":"Geomechanical analysis from well log for brownshale hydrocarbon development in the Bengkalis Trough, Central Sumatra Basin, Indonesia","authors":"A. Buntoro, C. Prasetyadi, R. A. Wibowo, A. M. Suranto","doi":"10.1080/12269328.2021.2002199","DOIUrl":"https://doi.org/10.1080/12269328.2021.2002199","url":null,"abstract":"ABSTRACT Geomechanical analysis using well log can be used to determine the fracable zone. Fracability is a parameter applied in the development of shale hydrocarbon to overcome the weaknesses in determining the fracable zone which was previously only based on high brittleness and considered a good hydraulic fracking candidate. The fracability model from the results of geomechanical analysis is used as the basis for hydraulic fracking planning for the development of Brownshale hydrocarbon in the Bengkalis Trough area, as a case study. Therefore, it has good development prospects. The geomechanical analysis of well BS-03, is the only well that penetrated the Brownshale formation. The geomechanical parameters investigation consists of Young’s modulus, Poisson’s ratio, unixial compressive strength, brittleness index, and the fracability index. Therefore, the fracability model is built by correlating the depth interval of the Brownshale formation and the geomechanical parameters, in order to determine the Brownshale formation interval as the basis for the location selection process and the hydraulic fracking interval. The results of geomechanical analysis show an interesting phenomenon in the fracability index, with negative and positive depth intervals at the top and bottom, respectively. The upper and lower depth intervals represent fracture barrier and fracable zone interval. Abbreviations vp: primary wave velocity (km/sec); vs: secondary wave velocity (km/sec); ρ: rock density (g/cc); E: Young’s Modulus (MPa); υ: Poisson’s ratio (dimensionless); UCS: unconfined compressive strength, MPa; Vp: primary wave velocity (km/sec) where; Ebrittleness: Young’s modulus of brittleness, fraction; Emin: Minimum Young’s modulus, MPa; Emax: Maximum Young’s modulus, MPa; FI: Fracability index, fraction; Bn: Brittleness normalization, fraction; En: Young’s Modulus normalization, fraction; B: Brittleness at analyzed depth, fraction; Bmin: Minimum brittleness in the formation was investigated, fraction; Bmax: Maximum brittleness in the formation was investigated, fraction; β: Biot’s effective stress constant; Bc: Skempton’s coefficient","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49656505","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}

{"title":"Modeling of micro-annulus propagation along cementing interface in stimulated horizontal wellbore","authors":"Yan Yan, Z. Guan, Weijun Yan","doi":"10.1080/12269328.2021.1978109","DOIUrl":"https://doi.org/10.1080/12269328.2021.1978109","url":null,"abstract":"ABSTRACT Once there are micro-annulus at cementing interfaces in the process of reservoir stimulation, it is easy to form fluid channeling in the later development. Fluid channeling reduces the efficiency of reservoir development and even the service life of oil and gas wells. Based on the characteristics of ‘multi-stage’ in stimulated reservoir volume, a mathematical model was set up to calculate the interface debonding length driven by hydraulic pressure. The propagation process of micro-annulus in stimulated reservoir volume was also analyzed. The results show that the propagation speed of the micro-annulus gradually slows down with the progress of fracturing. Meanwhile, the debonding azimuth of the micro-annulus and the cement elastic modulus have dominant effects on the propagation length. It is recommended that the setting position of the packer be outranged from the debonding area of the cementing interface in the design of the stimulated reservoir volume scheme to avoid fluid channeling between the stages. This study can predict the unsealing length of cement sheath during hydraulic fracturing as a reference for the optimization of fracturing parameters.","PeriodicalId":12714,"journal":{"name":"Geosystem Engineering","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2021-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45225417","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}