检索结果-内蒙古大学图书馆

3rd International Conference on Science and Technology 2019, ICST 2019

作者： Lukman, Nurany Karim, Razak Mining Engineering Study Program Faculty of Engineering Khairun University Ternate North Maluku Indonesia Mining Engineering Study Program Faculty of Engineering Muhammadiyah University Ternate North Maluku Indonesia

mining water is one of the main problems that has a great importance on mine productivity. In mining implementation, it is necessary to study the mining Water (Hydrogeology) system to support a good mine design. The mining Water drainage system is a method for making work sites in the mining area always dry. Prior to mining, hydrogeological analysis and rainwater management methods are carried out. Calculation of rainfall intensity using Gumbel Probability estimation and water capture area analysis obtained CA-1 Q = 915, 35, m3 / day CA-2 Q = 1149, CA-3 Q = 141116, 01CA-4 Q = 1407.89, the form of rainwater trapping channels in the form of trapezium and pump requirements in each catchment area of 1 (one) pump each. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Hydrogeology

来源：评论

学校读者我要写书评

暂无评论

Integrated Geoscience Data to Identify Heat Source Beneath Umeh Volcanic Complex in Tompaso Geothermal Field 9

Integrated Geoscience Data to Identify Heat Source Beneath U...

引用

9th ITB International Geothermal Workshop 2020, IIGW 2020

作者： Suryanto, Sigit Tofan Sastranegara, R.M. Untoro, Antonius Rishang Affif, Nanda Najih H. Effendi, Ristio Raharjo, Imam B. Suryantini Pertamina Geothermal Energy Indonesia Geothermal Engineering Master's Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia

Integrated geoscience data evaluation is needed to determine the location of the heat source in the Tompaso Geothermal Field. The location of the heat source in the Tompaso Geothermal Field should be known to update the conceptual model. The updated conceptual model can be used as a reference in development plans of Tompaso Geothermal Field. Therefore, through integrated geoscience data evaluation such as geological settings, remote sensing data, resistivity and gravity data, fluid chemistry data, and temperature measurements data from wells are expected to determine the presence of the heat sources, especially beneath Umeh Volcanic Complex (UVC) in the Tompaso Geothermal Field. Based on geological and remote sensing data, the location of heat sources of Tompaso Geothermal Field are predicted beneath Sempu Volcanic Complex (SVC) and Umeh Volcanic Complex (UVC). SVC is related to recent volcanic activity while UVC is related to "monogenetic"volcanism. The gravity data beneath SVC showed high gravity anomaly contrasts than its surrounding areas, while high gravity anomaly beneath UVC has lower contrast than SVC. However, chemical fluid analysis from thermal manifestations and temperature from the wells indicated the presence of heat source beneath UVC. © Published under licence by IOP Publishing Ltd.

关键词： Location

来源：评论

学校读者我要写书评

暂无评论

Resonance Behavior of an Obliquely-Oriented Conducting Wire Object Above a Halfspace

Resonance Behavior of an Obliquely-Oriented Conducting Wire ...

引用

Australian Microwave Symposium (AMS)

作者： Siyuan Li Chad Hargrave Hoi-Shun Lui School of Electrical and Data Engineering University of Technology Sydney Ultimo NSW Australia Sustainable Mining Research Program Commonwealth Scientific and Industrial Research Organisation Pullenvale QLD Australia

This paper examines the effect of a halfspace on the residues of the extracted resonant modes of an obliquely-oriented conductive wire target above it. Previous studies have focused on the case where the target is in free space, but in this case, the halfspace interacts electromagnetically with the target and alters the residue. The results show that the residue of the fundamental mode is affected by the dielectric properties of the halfspace, while the residues of higher-order modes remain similar as the properties change. These findings provide insights for designing automated recognition solutions for targets above halfspaces.

关键词： Target recognition Spaceborne radar Wires Radar scattering Microwave theory and techniques Dielectrics Behavioral sciences

来源：评论

学校读者我要写书评

暂无评论

Analysis of the Groundwater Table of Theis's Formula Through the Analytical and Numerical Methods Combination for Time-Lapse Microgravity Modeling

SSRN

引用

SSRN 2024年

作者： Lestari, Mutia Dyah Dahrin, Darharta Abdurrahman, Dadi Azhari, Naila Yuni Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jalan Ganesa 10 Bandung40132 Indonesia Geophysical Engineering Study Program Institut Teknologi Sumatera Jalan Terusan Ryacudu Desa Way Hui Lampung Selatan Kecamatan Jatiagung 35365 Indonesia

Massive and continuous well pumping can result in significant groundwater table decline, potentially leading to groundwater depletion and land subsidence over the long term. The timelapse microgravity method, an innovation in gravity measurement techniques, is currently widely used in hydrological applications, including groundwater table monitoring. Groundwater pumping induces changes in subsurface mass distribution, resulting in subsurface mass anomalies that can be detected using gravity method. Many previous studies have employed the slab Bouguer approach to estimate gravity anomalies due to groundwater table changes. This method has significant error for detail anomaly value of groundwater table, which is high decline near production wells. According to Theis formula, the groundwater table decline model as drawdown cone (inverted cone), which gravitational field is calculated. Therefore, calculated gravity anomaly must account for the drawdown cone shape. In this study, gravity anomaly calculations for groundwater drawdown cones are resolved by integrating triple integrals using cylindrical coordinates both analytical and numerical methods. The analytical calculation of integrating triple integrals can only be resolved for two variables (variable z and [[EQUATION]]), and for [[EQUATION]] variable is calculated using numerical methods with the trapezoidal rule. By making the trapezoidal step smaller for closer the well, it is expected this calculation has smaller errors. This study aims to provide more accurate gravity anomaly calculations in accordance with the conceptual model of groundwater table changes. This technique can be used to help groundwater management where monitoring wells is insufficient. © 2024, The Authors. All rights reserved.

关键词： Microgravity

来源：评论

学校读者我要写书评

暂无评论

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

Comparative Investigation of Synthetic and Novel Natural Sur...

引用

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

来源：评论

学校读者我要写书评

暂无评论

Approach for Pre-Feasibility Study of Medium Enthalpy Geothermal Field, Case Study: Danau Ranau, Indonesia 9

Approach for Pre-Feasibility Study of Medium Enthalpy Geothe...

引用

9th ITB International Geothermal Workshop 2020, IIGW 2020

作者： Rera, Gladiez Florista Pratama, Heru Berian Saptadji, Nenny Miryani Geothermal Engineering Master's Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia Jalan Trunojoyo No. 135 Jakarta Indonesia

The development of geothermal fields in Indonesia is carried out under the provisions of the applicable laws and regulations, namely Geothermal Law No. 21 of 2014 and Environmental Protection and Management Law No. 32 of 2009. Based on Law No. 21 of 2014, geothermal business activities consist of preliminary surveys, exploration, and exploitation. After the exploration phase (a detailed geological, geochemical, and geophysical study), a pre-feasibility study is needed to determine the feasibility of exploration drilling. The pre-feasibility study is done to manage project risks. Danau Ranau geothermal field is one of the 166 medium enthalpy geothermal prospects in Indonesia. Activities carried out in this field were geoscience studies. This research was conducted to determine how feasible the Danau Ranau medium enthalpy geothermal field was developed for direct and indirect utilization by looking at the acceptance of technical, financial, environmental, and risk studies. The study can be a tool for the developer to decide whether to continue the next development stage. The result shows that applying the approach for Danau Ranau Geothermal Field is feasible to develop with consideration. Plant of Development by cascade model with leveling utility of energy for Danau Ranau Geothermal Field shows optimal value both in the operational and financial sides. The first level is technically designed for electricity with ORC conversion technology and the cascade level for indirect use by Lindal Diagram and community empowerment in economic and social. In financial analysis, the cascade model has optimum profitability value expressed in NPV and equity IRR. © Published under licence by IOP Publishing Ltd.

关键词： Enthalpy

来源：评论

学校读者我要写书评

暂无评论

Productive Structural Geology in Volcanogenic System: A case study of Lumut Balai Geothermal Field, Indonesia 9

Productive Structural Geology in Volcanogenic System: A case...

引用

9th ITB International Geothermal Workshop 2020, IIGW 2020

作者： Nurseto, Sapto Trianggo Julia Satriani, R.A. Thamrin, Mochamad Husni Suryantini, N. PT. Pertamina Geothermal Energy Indonesia Geothermal Engineering Master's Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia

Lumut Balai is geothermal field that occurs in the caldera system, named Lumut Tua Caldera, approximately 9 km in diameter. Located in Penindaian Village, Muara Enim Regency, South Sumatra Province. Lumut Balai is one of the fields operated by Pertamina Geothermal Energy. The volcanism in Lumut Balai is closely related to the Sumatra Fault Systems activity. Surface data such as outcrops provide information regarding lithology, alteration type, and geological structures, while manifestations provide fluid geochemistry data. Subsurface data are acquired from rock cuttings and core samples (which are then further analyzed through petrographic analysis and XRD analysis), drilling parameters, and borehole image logging. These provide information and interpretation of subsurface geological conditions such as lithology distribution, alteration distribution, reservoir zone, heat source, and permeability. The methods above result in an interpretation of the Lumut Balai geological model. Lumut Balai is a geothermal system located within the Lumut Balai caldera, composed of andesite, andesite breccia, basaltic andesite, basalt, limestone, meta-sediment, tuff, and tuff breccia which are all altered to certain extents. There are five stratigraphic units, starting from the oldest to youngest are Tertiary Basement Unit, Pre-Old Lumut Unit, Pre-Caldera Unit, Caldera Unit, and Post-Caldera Unit. Alteration zones in Lumut Balai could be classified into smectite+chlorite zone, silica+chlorite zone, and chlorite+epidote zone. Productive faults in Lumut Balai are Air Ringkih Fault with NE-SW trend, Air Udangan Fault trending NE-SW, Lumut Tua Caldera and Gemurah Besar which trends N-S. This study aims to confirm the productive geological structure in Lumut Balai and gives better understanding for future field development, such as well targeting for makeup wells and reservoir simulation. © Published under licence by IOP Publishing Ltd.

关键词： Geothermal fields

来源：评论

学校读者我要写书评

暂无评论

Updated Numerical Model of Mataloko Geothermal Field 9

Updated Numerical Model of Mataloko Geothermal Field

引用

9th ITB International Geothermal Workshop 2020, IIGW 2020

作者： Jatmiko, Bambang Wahyu Pratama, Heru Berian Sutopo Geothermal Engineering Master's Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia Jalan Trunojoyo No. 135 Jakarta Indonesia

Data collection and further geoscience studies have been carried out in the Mataloko area at the end of 2019. In general, the results of the study showed significant differences compared to previous studies. Therefore, it is necessary to update the Mataloko geothermal field's numerical model following the latest studies' data and analysis. In this research, numerical modeling will be performed using a TOUGH2 V.2 simulator and graphical interface software. The model will be built and validated at the natural state phase. It is expected that the model can complement existing geoscience studies and can be used by developers in planning field development. © Published under licence by IOP Publishing Ltd.

关键词： Numerical models

来源：评论

学校读者我要写书评

暂无评论

Development of a Methodology for Forecasting of Photovoltaic Generation in the Short and Medium Term Based on an Analysis of a Photovoltaic System and a Meteorological Forecasting Platform

SSRN

引用

SSRN 2024年

作者： Rosso, André Possamai Rampinelli, Giuliano Arns Schaeffer, Lirio Federal University of Rio Grande do Sul Porto Alegre Brazil Postgraduate Program in Mining Metallurgical and Materials Engineering Antônio Marcelo Ferreira Street 41 Criciúma Santa Catarina88810-016 Brazil Federal University of Santa Catarina Araranguá Brazil Postgraduate Program in Energy and Sustainability Pedro João Pereira Street 150 Araranguá Santa Catarina88905-120 Brazil Postgraduate Program in Mining Metallurgical and Materials Engineering Aneron Correa de Oliveira Street 250 Porto Alegre Rio Grande do Sul 91410-070 Brazil

Uncertainties in PV production can make it challenging to dispatch energy into the electricity grid. Although PV storage solves this problem, predicting the solar photovoltaic (PV) energy produced is necessary to control the energy injected into the grid. In Brazil, photovoltaic solar energy has grown exponentially in recent years. The current scenario in Brazil is a synergy of legal, regulatory, research and development, fiscal, tax, and economic incentives. With the country's solar energy growth, there is a need to develop and apply methodologies for predicting photovoltaic generation. This article aims to develop a methodology (RRS) for predicting photovoltaic generation in the short (1h to 10h future) and medium (24h future) terms using the generation data from a grid-connected photovoltaic system and to compare it with the persistence method (PM). Numerical weather prediction (NWP) variables such as irradiance, cloud cover, and precipitation are input for next-day prediction models. Photovoltaic predictions for the next day's horizon show the most significant errors compared to predictions for the horizon a few hours ahead. The proposed RRS model is simple, easy to access and apply, and does not use irradiance data. In the RRS model, some parameters are already built in and do not need to be dealt with, such as soiling of the photovoltaic modules, shading, spectral mismatch of the photovoltaic cells with the radiation spectrum, losses due to mismatch, losses due to cabling, losses due to series and parallel resistance, among others. The application of the RRS methodology requires two searches/inputs. The first input is weather forecast data obtained from a weather forecasting platform, and the second is actual historical data on photovoltaic generation at the site where the method was developed. © 2024, The Authors. All rights reserved.

关键词： Weather forecasting

来源：评论

学校读者我要写书评

暂无评论

Structural Geology and Volcanism in Hululais Geothermal Area, Bengkulu, Indonesia 9

Structural Geology and Volcanism in Hululais Geothermal Area...

引用

9th ITB International Geothermal Workshop 2020, IIGW 2020

作者： Nurseto, Sapto Trianggo Arifin, Muhammad Tajul Pratama, Graniko Reza Nusantara, Vivi Dewi Thamrin, Mochamad Husni Suryantini PT. Pertamina Geothermal Energy Indonesia Geothermal Engineering Master's Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia

Hululais Prospect in Rejang Lebong, Bengkulu is one of the geothermal fields developed by Pertamina Geothermal Energy. The field is situated within the Bukit Barisan Mountain Range, an NW-SE volcanic arc of Sumatra, and located 8 km western from Musi Segment of Sumatra Fault Zone Zone. Based on field data from geological mapping, remote sensing analyses and borehole data these regional structures influence the occurrence of the NW-SE volcanic axis in Hululais Volcanic Complex (HVC). The Hululais Volcanic Complex (HVC) itself is a Quaternary volcanic complex which comprised of six crown units namely: (Bukit Resam, Suban Agung, Bukit Beriti, Bukit Gedang, Bukit Lumut and Bukit Pabuar) with its associated Hummocks and primary/secondary deposits. These NW-SE distributed of Subang Agung, Bukit Beriti and Bukit Gedang volcanic crowns can be grouped as Hululais Brigade. The manifestations distribution in Hululais also depict the influence of the NW-SE geological structure and its volcanic activity. This is validated by the presence of geothermal manifestation such as fumarole in the central of Hululais Volcanic Complex and hot spring in the medial - distal part of the field. © Published under licence by IOP Publishing Ltd.

关键词： Geothermal fields

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：