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The influence of activation methodologies on the rheological and filtration characteristics of Cyprus smectites for potential use as low density solids in drilling fluids. A case study of Polycanthos quarry 57

The influence of activation methodologies on the rheological...

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57th US Rock Mechanics/Geomechanics Symposium

作者： Ramsis, Youstina Sarris, Ernestos Papaloizou, Loizos Gravanis, Elias Vattis, Demetris University of Nicosia Department of Engineering Oil and Gas Program Nicosia Cyprus University of Nicosia Department of Engineering Civil and Environmental Engineering Program Nicosia Cyprus Cyprus University of Technology Department of Civil Engineering and Geomatics Limassol Cyprus Hellenic Mining Public Company Ltd Nicosia Cyprus

ISBN: (纸本)9780979497582

In this work, we investigate the suitability of Cyprus bentonite as low-density solid additive for drilling fluids. Bentonite samples were obtained from a quarry owned by Hellenic mining company Ltd. Samples were mechanically processed to a size + cations that act as swelling inhibitors. Future improvements could be the use of purification methods or chemically process the activation methods with intermediate cation exchange before full sodium activation. © 2023 57th US Rock Mechanics/Geomechanics Symposium. All Rights Reserved.

关键词： Bentonite

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Comparative Investigation of Synthetic and Novel Natural Surfactants' Role in Oil Emulsion Creation

Comparative Investigation of Synthetic and Novel Natural Sur...

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2025 SPE Gas and Oil Technology Conference, GOTECH 2025

作者： Kubasheva, A. Tuyakova, A. Zhuniskenov, Y. Serikov, G. Pham, T.T. Abbas, A.H. Department of Chemical and Materials Engineering School of Engineering and Digital Sciences Nazarbayev University Astana Kazakhstan Petroleum Engineering Program School of Mining and Geosciences Nazarbayev University Astana Kazakhstan Department of Biology School of Sciences and Humanities Nazarbayev University Astana Kazakhstan Institute of Geoenergy Engineering Heriot Watt University Edinburgh United Kingdom

ISBN: (纸本)9781959025733

Global trends show a growing need to reduce environmental impacts while maintaining high performance. As a result, the oil and gas industry is witnessing the rise of innovative, greener solutions to meet this critical need. Surfactants are of multiple industrial importance. This includes stabilizing emulsions, which are of pivotal importance for Enhanced Oil Recovery (EOR). Also, it is a pressing issue for Kazakhstan, where complex reservoir conditions exist. This study examines anionic surfactants, SDS, and a Henna-based surfactant for emulsifying light and heavy crude oils. Focus is placed on Kazakhstan's reservoirs. Heavy oil from West Kazakhstan and synthetic decane were tested. A 1:9 oil-to-water ratio was used for emulsions, replicating typical reservoir conditions. Tests were conducted at room temperature and 60°C. Henna consistently outperformed SDS, yielding a smaller creaming index (CI) and better emulsion stability across all concentrations. CI of 0.3 % for henna/crude oil systems could be achieved after 360 min and a significantly lower interfacial tension (IFT) was demonstrated by the interface (0.7 mN/m vs. 2.5 mN/m). Low CI values are supported by small droplet sizes of henna emulsions, compared to that of SDS (27.19 µm vs. 76.96 µm). These results demonstrate Henna's effectiveness in reducing IFT, viscosity and enhancing emulsion stability. The results show future potential for natural surfactant application in Kazakhstan. Copyright 2025, Society of Petroleum Engineers.

关键词： Gas industry

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Refining the Regional Aftershocks Catalog of the Ambon Earthquake Mw 6.5 on 26 September 2019 using manual picking and a non-linear algorithm: Preliminary Result 9

Refining the Regional Aftershocks Catalog of the Ambon Earth...

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9th Asian Physics Symposium 2021, APS 2021

作者： Kamaruddin, B. Sahara, D.P. Halauwet, Y. Master Program of Geophysical Engineering Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Indonesia Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Indonesia Earth Sciences Graduate Program Faculty of Earth Sciences and Technology Bandung Institute of Technology Indonesia Ternate Indonesia Ambon Indonesia

A destructive earthquake with magnitude Mw 6.5 occurred in Ambon, Indonesia, on 26 September 2019. This earthquake generated an aftershock sequence. In this study, we determined the location of the aftershock sequence using a non-linear algorithm from the Non-Linear Location (NonLinLoc) program. The catalog and waveform data were collected using 11 seismographs from BMKG regional network located around the Maluku archipelago. The data was recorded between 26 September and 18 October 2019. We have manually picked the P-and-S wave phase by using Seisgram2K software. In our preliminary result, we have located about 1,300 events of aftershock sequence with about 8,500 phases of P and S waves. Overall, the location of the focus depth of the aftershock sequence is dominantly distributed in between 5 - 25 km. Approximately ∼70% of the distribution of aftershock locations show a North-South (N-S) oriented pattern from west Seram to Ambon Islands. Meanwhile, about ∼20% of the aftershock's locations are distributed around Ambon Island. Our ongoing and future study is to determine accurate hypocentre location derived from double-difference hypocenter relocation with waveform cross-correlation. © Published under licence by IOP Publishing Ltd.

关键词： Location

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Expanding the Scene of Tunnel Behaviour Through the DEM Model: a Case Study from ZaB-Zentrum Am Berg

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BHM Berg- und Huttenmannische Monatshefte 2023年第12期168卷 586-595页

作者： Promneewat, Khomchan Leelasukseree, Cheowchan Villeneuve, Marlene Galler, Robert NATM Engineering program Institute of Rock Mechanics and Tunnelling Graz University of Technology Rechbauerstraße 12 Graz8010 Austria Department of Mining and Petroleum Engineering Faculty of Engineering Chiang Mai University Chiang Mai50200 Thailand Subsurface Engineering Montanuniversität Leoben Franz-Josef Straße 18 Leoben8700 Austria

The displacement of a tunnel plays a crucial role in conventional tunneling methods, serving as a key parameter for support requirement. Therefore, analyzing tunnel displacement is important for ensuring safety and optimizing costs by determining the appropriate level of tunnel support and installation time. Numerical analysis methods are commonly employed for assessing tunnel displacement, and two widely recognized approaches used worldwide are the continuum and discontinuum methods. While previous studies have highlighted differences in the analysis results obtained from these two methods, the magnitude of such disparities has not been extensively explored. Hence, the objective of this study is to quantify the extent of variation between the two methods through various scenarios, encompassing unsupported and supported excavated ground. Specifically, the focus is on tunnel displacement and the tensile force generated on axial tunnel supports, such as rock bolts. To facilitate this investigation, three tunnel sections from the Zentrum am Berg, tunnel research centre located in Austria, are utilized. The results show that discontinuum models exhibit higher displacements and higher tensile loads on axial support than continuum numerical models of the same tunnel geometry and equivalent rock masses. We show that discontinuum models can also capture asymmetric behaviour, and thus should be preferentially used in fractured rock masses where displacement of rock blocks dominate the rock mass behaviour. © 2023, The Author(s).

关键词： Finite element method

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Optimized CeO_(2) Nanowires with Rich Surface Oxygen Vacancies Enable Fast Li-Ion Conduction in Composite Polymer Electrolytes

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Energy & Environmental Materials 2023年第1期6卷 218-223页

作者： Lu Gao Nan Wu Nanping Deng Zhenchao Li Jianxin Li Yong Che Bowen Cheng Weimin Kang Ruiping Liu Yutao Li State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes School of Textile Science and EngineeringTiangong UniversityTianjin 300387China Materials Science and Engineering Program and Texas Materials Institute The University of Texas at AustinAustin TX 78712USA Department of Materials of Science and Engineering China University of Mining and Technology(Beijing)Beijing 100083China Enpower Energy Corp. Beijing 102600China

Low-cost and flexible solid polymer electrolytes are promising in all-solid-state Li-metal batteries with high energy density and ***,both the low room-temperature ionic conductivities and the small Li^(+)transference number of these electrolytes significantly increase the internal resistance and overpotential of the ***,we introduce Gd-doped CeO_(2) nanowires with large surface area and rich surface oxygen vacancies to the polymer electrolyte to increase the interaction between Gd-doped CeO_(2) nanowires and polymer electrolytes,which promotes the Li-salt dissociation and increases the concentration of mobile Li ions in the composite polymer *** optimized composite polymer electrolyte has a high Li-ion conductivity of 5×10^(-4)4 S cm^(-1) at 30℃ and a large Li+transference number of ***,the composite polymer electrolytes have excellent compatibility with the metallic lithium anode and high-voltage LiNi_(0.8)Mn _(0.1)Co_(0.1)O_(2)(NMC)cathode,providing the stable cycling of all-solid-state batteries at high current densities.

关键词： composite polymer electrolytes,Gd-doped CeO_(2)nanowires Li-ion conduction oxygen vacancies surface interaction

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Love Wave Group Velocity Extraction Using Ambient Noise Tomography in West Java, Indonesia 9

Love Wave Group Velocity Extraction Using Ambient Noise Tomo...

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9th Asian Physics Symposium 2021, APS 2021

作者： Luthfiyani, N. Rosalia, S. Yudistira, T. Widiyantoro, S. Puspito, A.N.T. Master Program of Geophysical Engineering Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jalan Ganesa No. 10 Bandung40132 Indonesia Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jalan Ganesa No. 10 Bandung40132 Indonesia

West Java, Indonesia, is located in the northern part of the subduction zone between the Australian and Eurasian plates, with a complex tectonic setting and high seismicity level. In 2016, Institut Teknologi Bandung (ITB) and Australia National University (ANU) deployed 85 temporary seismometers to investigate this area. We constructed the shallow crust profile by applying the Ambient Noise Tomography (ANT) method to improve our knowledge of the tectonic condition in West Java. In this research, we used the north-south (NS) and east-west (EW) components to extract the Love waves Green's function. We first rotated the NS and EW daily data series to obtain the transverse component. We then pre-processed the transverse daily data and applied cross-correlation to all station pair data. The daily cross-correlated data is stacked to obtain the Love waves Green's function. The Green's function in this study is clearly seen in the 1-25 s period band. The obtained Green's function will be analyzed further to get the Love waves group velocity which then will be inverted to obtain the shear wave velocity (Vs) profile beneath the study area. © Published under licence by IOP Publishing Ltd.

关键词： Shear waves

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Review of Lithium Extraction Suitable for Indonesia Geothermal Brine

Review of Lithium Extraction Suitable for Indonesia Geotherm...

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2024 Geothermal Rising Conference: Using the Earth to Save the Earth

作者： Suud, Esty Mustika Suryantini Lubis, Herbert Geothermal Master Program Faculty of Mining and Petroleum Engineering ITB Bandung Indonesia Applied Geology Research Group Faculty of Earth Science and Technology ITB Bandung Indonesia Alumnus Sarulla Geothermal Project Indonesia Renewable Energy Society Indonesia

ISBN: (纸本)0934412308

Lithium is the cornerstone of energy transition for Indonesia to achieve Net Zero Emissions by 2060 or earlier. This energy transition will drive the Indonesia demand projection for Electric Vehicle Battery and Energy Storage System and in turn will demand much more lithium for this transition effort. Many studies have been conducted to find the sources of lithium, one of them is geothermal brine. Indonesia has enormous geothermal resources, some fields have lithium content that can potentially be extracted. Various methods in the extraction process of lithium from the geothermal brine have been developed, both on laboratory and pilot projects. The geothermal brine is typically pumped to the surface by a geothermal power plant, used for energy generation, and then returned to the underground reservoir via an injection well. Prior to reinjection the geothermal brines contain in the temporary ponds whereas the lithium extraction points may occur here or at any point suitable for the extraction technology. Typically there are three phases in the lithium extraction, like end- to-end process technology solutions, namely 1) Lithium Brine Extraction-depending on the geothermal brines field compositions, pre-treatment may be employed to remove any contaminants or unwanted constituents from the brines, then selective absorbents are used to separate lithium from other elements 2) Concentration with membrane system to concentrate lithium at a desired concentration 3) Deposition using chemical precipitation and purification for saleable lithium production. This paper reviews traditional brine extraction and direct lithium extraction (DLE) in general and specifically in geothermal brine. The study is based on a desktop study and aims to summarize the knowledge, method, technology, and techniques of lithium extraction from geothermal brine that has already been used and to find out which extraction method is suitable for the Indonesian geothermal field. Our finding indicates the

关键词： Reverse osmosis

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Characterization of geotechnical properties of Phnom Penh bedrock: A case study in Chrouy Chongvar and Dangkao Districts 58

Characterization of geotechnical properties of Phnom Penh be...

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58th US Rock Mechanics / Geomechanics Symposium 2024, ARMA 2024

作者： Boeut, S. Fujii, Y. Sieng, P. Kaing, S. Alam, Badrul A.K.M. Dzimunya, N.Z. Oudom, S. Boeut, S. Georesources and Geotechnical Engineering Department Institute of Technology of Cambodia Phnom Penh Cambodia Faculty of Engineering Hokkaido University Sapporo Japan Department of Petroleum and Mining Engineering Faculty of Civil Engineering MIST Dhaka Bangladesh Geotechnical Laboratory Ocean Civil Engineering Program Department of Engineering Kagoshima University Japan Department of Conservation of Monuments and Archaeology APSARA National Authority Cambodia

ISBN: (纸本)9798331305086

Bedrock layers support large load structures, while Phnom Penh faces limitations in mechanical properties. This research conducted rock testing on sandstone from Chroy Changvar and Dankao districts, both strongly developed zones in Phnom Penh. The fine-grain sandstones were compressed under varying conditions of confining stress of 0 to 6 MPa and pore water pressure of 1 MPa. Permeability was assessed at pore water pressures of 1 MPa and confining stress of 3 MPa. Core rock samples, collected at depths of 43 to 50 m below the surface from both sites, revealed characteristics. The dry and wet density of Chroy Changvar sandstone existed at 2,503 kg/m3 and 2,574 kg/m3, with a permeability value of 1.43∙10-14 m2 of pre-failure rock 1.87∙10-14 m2 showing slightly increase. The maximum peak stress ranged from 11 to 75 MPa. Shear properties were estimated, indicating an internal friction angle of 57-degree, rupture plane angle of 16.5 degrees, and cohesion of 1.6 MPa. Dangkoa siltsotne showed the value of dry and wet densities of 2,682 kg/m3 and 2,699 kg/m3, respectively, with intact rock permeability of 8.63∙10-15 m2 with highly increased in fractured rock permeability of 1.64∙10-12 m2. This rock existed of high stress under compression with the peak stress of 100 MPa to 330 MPa exhibited a brittle-rock type even the increase in confining stress. The internal friction angle of 71-degree, rupture angle of 10 degree, and cohesion of 11.2 MPa. The study provides insights into the contrasting mechanical properties of bedrock of two districts in Phnom Penh. Chroy Chongvar sandstone displayed plasticity, while Dankoa sandstone exhibited brittleness. These findings contribute valuable information for understanding and managing subsurface conditions in urban environments. Copyright 2024 ARMA, American Rock Mechanics Association.

关键词： Sandstone

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Applying grey clustering and Shannon entropy to assess social impact from lithium mining project 29

Applying grey clustering and Shannon entropy to assess socia...

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29th IEEE International Conference on Electronics, Electrical engineering and Computing, INTERCON 2022

作者： Rios, Solange Delgado, Alexi De La Cruz, Antony Pontificia Universidad Católica del Perú Mining Engineering Section Lima Peru Universidad de Ciencias y Humanidades Engineering Industrial Program Lima Peru

ISBN: (数字)9781665486361

ISBN: (纸本)9781665486361

The social aspect has become a key factor in the viability of mining projects in Latin America, and Peru is no exception. In this work, we implemented a methodology called the Integration of the grey clustering and entropy-weight method (IGCEW) which aims to determine social impact and assess potential environmental conflicts. The case study examined a mining project in southern Peru where four stakeholder groups and seven criteria were identified. The results revealed that for the local government and business groups, the project would have a positive and normal social impact, respectively. While for the community authorities and alpaca herders groups, the impact would be negative. In addition, it was also determined that the criterion most likely to generate environmental conflicts was Employment rate. These findings could help the central and regional government of Peru to seek appropriate measures to prevent environmental conflicts during the implementation of the mining project. © 2022 IEEE.

关键词： Lithium

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Features engineering and Features Extraction of Volcano-Tectonic (VT) Earthquake 9

Features Engineering and Features Extraction of Volcano-Tect...

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9th Asian Physics Symposium 2021, APS 2021

作者： Martanto, Martanto Nugraha, Andri Dian Sahara, David P. Syahbana, Devy Kamil Rahsetyo, Puput P. Priambodo, Imam C. Ardianto, Ardianto Master Program of Geophysical Engineering Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung Indonesia Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung Indonesia Center for Volcanology and Geological Hazards Mitigation Geological Agency Ministry of Energy and Mineral Resources Indonesia

A volcano-Tectonic earthquake, commonly referred to as VT, is an earthquake caused by magma intrusion that increases the pressure below the volcano's surface. The accumulation of stress that continuously affects the elasticity of rocks causes fractures when the elasticity limit of rocks is exceeded. VT is one of the earthquakes used as a parameter to decide the level of volcanic activity. To understand the characteristics of VT, it is necessary to do features engineering, which is a process of extracting features so that the characteristics of VT are obtained. The data used in this study was the VT earthquake when Agung was in crisis in 2017. The extraction process is conducted by performing statistics calculations in temporal and spectral domains. The waveform of VT is univariate time series data, and to perform the extraction of features, this study uses changes in amplitude value to the time taken from the waveform. Features that were successfully extracted from this study are as many as 48 features. The result of the extraction of these features can be used as input parameters in performing auto-classification of VT using machine learning. © Published under licence by IOP Publishing Ltd.

关键词： Volcanoes

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