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Novel robust Elman neural network-based predictive models for bubble point oil formation volume factor and solution gas–oil ratio using experimental data

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Neural Computing and Applications 2024年第23期36卷 14503-14526页

作者： Kohzadvand, Kamyab Mahmoudi Kouhi, Maryam Ghasemi, Mehdi Shafiei, Ali Tehran Iran Petroleum Engineering Program School of Mining and Geosciences Nazarbayev University Astana010000 Kazakhstan

Bubble point oil formation volume factor (Bob) and solution gas–oil ratio (Rs) are two crucial PVT parameters used for modeling and volumetric calculations in petroleum industry. They are usually determined in laboratory or estimated using empirical correlations. Experimental methods are time-consuming and expensive where empirical correlations have limitations. Artificial intelligence can be sued overcome these limitations to develop more accurate, robust, and quick predictive tools. In this paper, we used three artificial neural network algorithms to develop intelligent models to predict Bob and Rest using 465 experimental data. Application of the Elman neural network (ENN) for this purpose is being reported for the first time. A variety of input parameters were selected based on a sensitivity analysis which include reservoir temperature (T), oil API gravity (°API), bubble point pressure (Pb), gas-specific gravity (γg), and Rs was used to predict the Bob. T, °API, Pb, γg, and Bob was used to predict the Rs. The ENN model was found superior to the other developed smart models and the empirical correlations with coefficient of determination (R2) of 0.993, root mean square error (RMSE) of 0.0093, and average absolute percent relative error (AAPRE) of 0.93% for the Bob and 0.999, 0.016, and 6.72% for the Rs, respectively. The ENN network has fewer adjustable parameters and provides faster training capabilities using fewer neurons and hidden layers compared to other ANN algorithms. The developed smart predictive tools can be safely used instead of laboratory methods and empirical correlations for a much wider ranges of input parameters and with higher accuracy and confidence. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2024.

关键词： Mean square error

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Advances in software-as-a-service platforms to perform emission inventories for quantifying fugitive emissions and tracking efforts to reduce the dust footprint of extractive industries

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mining engineering 2022年第281期74卷 30-34页

作者： Zolata, Hasan Bhattacharyya, Sekhar AMET Consulting Toronto Canada The Mining Engineering Program The Pennsylvania State University United States

In recent years airborne particulate matter and respirable coal mine dust have been at the center of research focused on worker health in the resource and infrastructure industries because of a resurgence of severe forms of lung disease among mine workers. Federal research agencies have heavily invested in finding the root cause. Attempts are also being made to coordinate various research findings. The Environmental Protection Agency (EPA) requires maintaining of Emissions Inventory (EI) where a detailed estimate of "criteria" pollutants and "hazardous" air pollutants is performed. Respirable dust falls under the "hazardous" category. However, it is unclear whether there are modern tools to perform emission inventories in the mines where such respirable diseases are prevalent. Performing EI has the potential to increase the awareness about dust footprint in extractive industries. This article is the first of a two-part series in which the authors present available platforms for EIs and their pros and cons. The second part will focus on recent achievements in respirable-dust-related research at various universities and organizations.

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Advancing Precision Agriculture: Machine Learning-Enhanced GPR Analysis for Root-Zone Soil Moisture Assessment in Mega Farms

IEEE Transactions on AgriFood Electronics

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IEEE Transactions on AgriFood Electronics 2025年第1期3卷 98-109页

作者： Namdari, Himan Moradikia, Majid Zekavat, Seyed Askari, Radwin Mangoubi, Oren Petkie, Doug Data Science Program WorcesterMA01609 United States Michigan Technological University Department of Geological and Mining Engineering and Sciences HoughtonMI48105 United States Physics Department WorcesterMA01609 United States

In this article, we investigate an intelligent ground penetrating radar (GPR) that facilitates root-zone soil moisture estimation, a key parameter in precision agriculture. To create an intelligent GPR, we must train machine learning (ML) methods applied to the GPR-received signal. This process requires a large number of labeled GPR data that would be time-consuming and labor-intensive if created via field measurements. This article uses gprMAX software to emulate drone-coupled GPR received signal to generate large-scale data for training ML models. The data are created via a 1.5 GHz Ricker waveform considering a three-layer soil consistent with a realistic soil horizon model. The approach is structured as follows: first, we generate a synthetic dataset using gprMAX. Feature engineering techniques are then employed to extract meaningful components from the GPR signals, followed by a rigorous selection process to identify the most effective ML model for soil moisture prediction. Finally, we validate our model by integrating synthetic data with real GPR data collected at the SoilX lab at Worcester Polytechnic Institute, enhancing prediction accuracy and generalization capability. Our proposed model achieves an overall average root-mean-squared error of 0.5%, and 1.56 cm for moisture and depth estimations, respectively. The proposed intelligent GPR, when installed on a drone, enables high horizontal (e.g., 10 m) and vertical (e.g., 1.5 cm) resolution and high penetration depth (beyond 2 m) megafarm root-zone 3-D moisture map creation. Thus, it offers much higher capabilities when compared to traditional methods, such as synthetic aperture radar and satellite imaging. These results facilitate efficient farming practices, such as optimizing irrigation models, for better crop yields and food security. © 2023 IEEE.

关键词： Soil moisture

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A novel green nanocomposite for EOR: Experimental Investigation of IFT Reduction, wettability Shift, and nanofluid stability

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Journal of Molecular Liquids 2024年第PartA期414卷

作者： Bello, Mohammed Nasiru Shafiei, Ali Petroleum Engineering Program School of Mining & Geosciences Nazarbayev University Astana010000 Kazakhstan

A stable nanofluid (NF) is crucial for success of nano-enhanced oil recovery (nEOR) processes. However, this represents a significant challenge as nanoparticles (NPs) tend to agglomerate under high salinity and NP concentration adversely affecting the oil recovery. New nanomaterials including functionalized nanoparticles also known as nanocomposites (NC) can help to overcome these issues. In this paper, first, we reported synthesis, characterization, and performance evaluation of a novel hydrophobic CuO-SiO2-Montmorillonite-K+-Thiazine NC for the first time. The NC was characterized using Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Analysis (EDAX), X-Ray Diffraction (XRD), Thermogravimetry Analysis (TGA), and Fourier Transform Infrared Spectroscopy (FTIR). SEM analysis showed that the NC is composed of uniformly distributed NPs. EDAX results confirmed presence of Cu, SiO2, O2, and Cl in the NC. XRD analysis indicated that SiO2 is the dominant phase in the crystal lattice and responsible for adsorption capacity of the NC. TGA analysis showed that the NC will be thermally stable in typical reservoir temperatures (∼80°C). FTIR results confirmed presence of Si-O, Cu-O, Si-O-Si, Al-O-Si, Al-OH, and OH bonds in the NC. In the second phase of this research work, the novel NC was used to investigate recovery of a Kazakhstani paraffinic heavy crude oil from Berea sandstone with focus on IFT reduction, oil recovery, wettability alteration, and stability analysis of the NFs. NFs were prepared with NC concentrations of 250, 500, and 1,000 ppm using moderate salinity (MS), low salinity (LS), and distilled water (DW). The results showed that the optimal NF (250 ppm LS) exhibited a high zeta potential value (−65.5 mV) indicating a high stability which is superior to all of the previously reported NCs. This high stability is attributed to use of thaizine as a source of natural surfactant. The optimum NF also altered the wettability of the sandstone by 77.6% and the

关键词： Fourier transform infrared spectroscopy

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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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Polymer blends of poly(lactic acid) and starch for the production of films applied in food packaging: A brief review

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Polymers from Renewable Resources 2023年第2期14卷 108-153页

作者： Carneiro da Silva, Lucas Rafael Rios, Alessandro de Oliveira Campomanes Santana, Ruth Marlene Postgraduate Program in Mining Metallurgical and Materials Engineering Laboratory of Polymeric Materials Federal University of Rio Grande do Sul Rio Grande do Sul Brazil Postgraduate Program in Food Science and Technology Laboratory of Bioactive Compounds Federal University of Rio Grande do Sul Rio Grande do Sul Brazil

The limited degradation of synthetic polymers used in food packaging when discarded in the environment is a major concern for society. Therefore, industry and academia have sought to develop biodegradable and eco-friendly materials for single-use in packaging. An interesting alternative for the food industry is biodegradable polymeric films, which is why different biopolymers have been used in the production of sustainable packaging. It is worth mentioning that the use of biodegradable polymers is one of the most successful innovations in the industry to address issues related to the environment. Among the available raw materials, starch extracted from different renewable sources is very promising for this purpose, due to its abundance, low-cost compared to other polymers and ability to produce non-toxic films. However, when used alone, pure starch has many limitations, which can be overcome by developing a mixture with other polymers (polymer blends), preferably from renewable and biodegradable sources, such as poly(lactic acid) (PLA). In this context, the absence of literature reviews evidencing the results of the application of films in foods led us to write this article, given the importance of polymer blends produced with different types of starch (cassava, corn, pea, potato, rice and wheat) and the PLA matrix. According to the results, it is clear that polymer blends based on PLA/Starch for food packaging are very promising, already being part of the industries solutions, aiming to minimize the large volume of plastic waste of petrochemical origin discarded in nature. Obviously, as with any technology, more research is needed to further improve the performance of the films, and while much research has made great strides, there are still limitations that prevent the commercialization of these materials. © The Author(s) 2023.

关键词： Starch

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Assessing the performance of various initial support systems for tunneling in swelling clay-A case study from the Manikin diversion tunnel in Indonesia 56

Assessing the performance of various initial support systems...

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56th U.S. Rock Mechanics/Geomechanics Symposium

作者： Prassetyo, S.H. Stephen Wattimena, R.K. Baskara, A. Mining Engineering Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung West Java Bandung Indonesia Tbk Manikin Dam Project Kupang Regency East Nusa Tenggara Indonesia

ISBN: (纸本)9780979497575

This paper describes the swelling phenomenon that occurs in the Manikin tunnel, an ongoing diversion tunnel for the Manikin Dam Project in Kupang, Indonesia, driven through swelling clay underlain by the Bobonaro Formation. The Manikin tunnel experiences significant large deformation, resulting in substantial damage to its initial supporting structures. Three initial support systems are assessed through numerical simulation using the 2-D finite element method, namely: (1) the original design, (2) larger steel-rib + invert beam, and (3) the original design with forepoling + invert beam. To represent the swelling phenomenon, a zone of ground strength reduction is developed in the area surrounding the tunnel, and swelling pressure is exerted on the initial lining. This method is able to match the results of convergence monitoring. Numerical simulations show that the original initial support design results in large convergence up to 89 cm or 11.4% strain and thickness of plastic zone up to 3 m, but the proposed alternative support systems are able to control the convergence much better. For the initial support with larger steel rib + invert beam, the convergence is only 14 cm or 1.8% strain, and for the original support with forepoling + invert beam, the convergence is only 9 cm or 1.2% strain. This paper points out that the original support design with forepoling + invert beam yields the best supporting method as it results in the smallest horizontal and diagonal convergences. © 2022 ARMA, American Rock Mechanics Association.

关键词： Rock mechanics

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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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TECTONIC GEOMORPHOLOGY ANALYSIS OF THE EAST LEMBANG FAULT SYSTEM IN THE UJUNG BERUNG AND JATINANGOR AREA, WEST JAVA, INDONESIA 44

TECTONIC GEOMORPHOLOGY ANALYSIS OF THE EAST LEMBANG FAULT SY...

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44th Asian Conference on Remote Sensing, ACRS 2023

作者： Sulastri, Murni Sadisun, Imam A. Sulaksana, Nana Sukrisyanti Rendra, Pradnya Paramarta Raditya Wahyuni, Sri Geological Technology Study Program Mining Energy Polytechnic Bandung Bandung Indonesia Indonesia Indonesia Faculty of Geological Engineering Universitas Padjadjaran Bandung Indonesia Bandung Indonesia

ISBN: (纸本)9781713893646

Lembang fault is an active fault that may trigger earthquakes and landslides in the North Bandung area. The movement of the fault is on the mainland, theLembang fult is still being debated even though an earthquake has been recorded which may have originated from this fault. The epicenter in the Cihideung area, in addition to tectonic influences, the activity of the Lembang fault is also thought to be influenced by volcanism which can affect the mechanism of fault movement. Tectonic processes play an essential role in the formation of the morphology of an area. The Lembang fault is a normal fault that was formed as a result of tectonic activity in the Neogene sge, located in the northern part of Bandung, stretching for 30 km in a west-east direction, the existence of this fault has shaped the morphology of the Lembang plains to the north and forms a hilly path trending west-east to the north. South. Tectonic geomorphology is the main factor that controls the development of landforms in active tectonic areas and have a significant influence on the natural features of mountains and watersheds which are located east of the Lembang fault, Cikapundung, and Cikeruh. Trending northwest-southeast geomorphic indication analysis is used to study tectonic activity in the study area in the form of basin shape (Bs), watersheds gradient index (SL), drainage basin asymmetry (Af), mountain face sinuosity (SMF) and valley floor width to valley height ratio (Vf). These geomorphic indication variables are combined to produce degrees of relative tectonic activity in the research area which can be divided into four classes;class 1 has a very high relative tectonic activity index, class 2 has a relatively high tectonic activity index, class 3 has a relatively moderate tectonic activity index, and class 4 has a relatively low tectonic activity index, field observation data in the form of the landform and geology of the research area support these results. © 2023 ACRS. All Rights Reserved.

关键词： Geomorphic Indication Lembang Fault Tectonic Geomorphology

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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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