bluuebunny/crossref_metadata_2025_split huggingface dataset:
Penentuan kriteria ekonomi sirkular dan keberlanjutan dalam pemilihan suplier pada rantai pasok pangan menggunakan fuzzy demantel approach
Authors: Aprilia Ira , Handayani Dwi Iryaning , Izzuddin Ahmad , Maflahah Iffan 
Published: October 2024

This research aims to determine the criteria for CE and sustainability as indicators for evaluating suppliers in the food supply chain. This study is beneficial in realizing government regulations on environmentally friendly products. The method used in this research combines fuzzy multi-criteria decision making theory and the Dematel technique, known as Fuzzy Dematel. The criteria for CE and sustainability in the food supply chain suppliers in this study are obtained from literature and Expert’s opinions, consisting of 20 criteria distributed across four aspects: economic, environmental, social, and circular. The criteria that have a strong influence and relationship with CE and sustainability criteria in the evaluating food supply chain suppliers are cost, design of products, and the use of recyclable materials in packaging products. This indicates that these criteria are the most important factors that can have a significant influence as indicators for selecting CE and sustainability suppliers. With these criteria, managers can assist in evaluating supplier in industries undergoing a transition toward a CE.
Simulation of Vertical Thin-Film Solar Battery under Exposure of Concentrated Solar Radiation
Authors: Esman A. K. , Zykov G. L. , Potachits V. A. , Kuleshov V. K. 
Published: October 2024

Solar energy is one of the most important and promising energy sectors in the world. Batteries that convert sunlight into electrical energy could become a replacement for traditional carbon-based energy sources. Vertical thin-film solar batteries are one of the new approaches to solar energy generation. The vertical configuration of solar panels provides maximum absorption of sunlight throughout the day. This orientation allows the batteries to capture solar energy even at low angles of incidence of the sun’s rays, which prolongs their operating time and improves the efficiency of electricity production. In this work, the authors proposed a three-dimensional model of a vertically oriented solar battery, as well as they calculated and evaluated the temperature characteristics and the efficiency obtained under conditions of changing ambient temperature. Herewith the power densities of concentrated solar radiation with maximum values from 1 to 10 kW/m2 were varied. The distribution of the maximum values of the surface temperature of the solar battery has been studied. Also, the dependences of the maximum values of the solar battery temperature and the temperature gradient inside it, as well as the dependences of the minimum and maximum values of the heat flux from the solar battery surface on the time of day in the middle of January and July have been studied and plotted. As the calculations have shown, the maximum values of the temperature gradient inside the solar battery in January are ~47–50 % higher than in July. The potential difference, generated by the battery, reaches its maximum values from 11 a.m. to 4 p.m. both in January and July. The use of vertical thin-film solar batteries will improve the power generation efficiency and lower operating costs by reducing the influence of dust, rain and snow.
Disposable Fibre Optic Reservoir Monitoring Surveys in CO2 Injection Wells: Operations Planning, Outcomes and Lessons Learnt
Authors: Shawcross T. , Crawford R. , Green A. , Yurikov A. , Jacobs B. , Phythian P. , Scoby-Smith L. , Jain L. 
Published: October 2024

Abstract
Surveillance data was acquired in four Gorgon CO2 injection wells using Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS) technology. The primary objective was to acquire temperature warmback data to quantify the CO2 injection profile and demonstrate containment at the wellbores. The secondary objective was to demonstrate the application of fibre optics in subsurface monitoring for the CO2 injection project by acquiring multi-offset Vertical Seismic Profile (VSP) surveys and continuous DAS data.
Temperature warmback surveys were recorded over 3-5 days following a 24-hour injection period to cool the formation. Coincident multi-offset VSP surveys were acquired during the warmback period using a vibroseis truck. A disposable fibre optic technology was selected for these surveys due to its lightweight equipment and small footprint, reducing intervention risk over live CO2 wells. Bare optical fibres are wound within a probe that free falls into the well, unspooling two fibres as it descends. Developed work practices considered safe wellhead access, avoiding phase changes to the CO2, effective pressure control and material selection.
The four well program was completed without safety incident or major non-productive time. The probe was deployed to depth in all wells with no observed fibre degradation due to exposure to well fluids. The operator, disposable fibre and seismic survey providers collaborated efficiently to acquire data simultaneously. The acquisition was monitored on site and real-time streamed to decision support centers in Aberdeen and Houston.
The warmback surveys were successful in demonstrating that CO2 is contained at the injection intervals; however, challenges were experienced acquiring complete and accurate temperature data across the injection intervals over the extended survey periods. The primary cause was fibre damage and/or breakage due to crossflow between perforated sections. While a qualitative interpretation of the injection profile was possible for most wells, the combination of crossflow and Joules-Thomson cooling combined with fibre damage made quantification difficult. The nature, causes, management, and impact of these are discussed in the paper, along with lessons learned and potential mitigations.
Python Driven Pore Network Modelling for Evaluating H2 Storage in Geological Formations Through Capillary Pressure and Relative Permeability Curves
Authors: Saraf S. , Keshavarz A. , Ali M. , Iglauer S. 
Published: October 2024

Abstract
This study utilizes micro-CT scan data to construct accurate pore network models for predicting carbon and hydrogen storage in geological formations by pore scale modeling. The creation of a dynamic pore network model utilizes advanced Python techniques, enabling the effective machine investigation of petrophysical data. This model is utilized to assess the capacity for storing substances, specifically examining how these gases are distributed and their ability to be trapped inside the formations. An innovative Python technique is used on an adaptable sandstone three-dimension pore network model, which optimizes computational processes for analyzing correlations between capillary pressure-saturation. NumPy, SciPy, and NetworkX facilitate the creation of a reliable pore network model with modern features. The model evaluates the efficiency of hydrogen and carbon storage, offering detailed understanding of characteristics. The simulations were executed utilising the poreFoam a data analyst, a Python-based tool developed on the foamExtend update, which is a modified version obtained from OpenPNM/OpenFoam. The study emphasizes important areas where sequestration occurs and emphasizes the importance of using modern computational tools to accurately assess storage, which improves the comprehension of geological sequestration.
First Multilateral Well with Lower Completions in Both Lateral - Case Study of the Most Congested Field in Abu Dhabi
Authors: Baig Umair Ahmed , Ali Al Mohammad Mohammad , Alshaigy Ahmad Othman , Aisha Mohamed Abu , Al Mutawa Ahmed Abdulla 
Published: October 2024

Abstract
This paper provides a comprehensive overview of the TAML Level 2 multi-lateral well by the Field Operator, which features a permanent limited entry liner completion in both laterals to enhance the reservoir productivity. The well marks a significant technical achievement for the company by combining two wells from different reservoirs and injecting into both laterals using the same surface well construction.
The primary objectives of the project were to drill and complete a dual lateral well with commingled injection at minimum risk and cost and to evaluate and report on its production performance. Notably, the project differed from other multi-laterals drilled by the Field Operator, as it featured lower completions in both laterals, while previously drilled multi-lateral had one of the laterals as barefoot.
The project's economic feasibility was evaluated by analyzing the costs related to drilling two different wells versus drilling the wells from the same surface location using a whipstock and completing the well. The alignment between the asset, drilling and completions team, and all stakeholders was essential to ensure that the project's expected risks were accurately assessed.
Additionally, a proper anti-collision analysis was crucial, given that the field where the well was planned to be drilled is highly congested, with over 2000 wells already drilled in the area. As a result, special precautions were taken to minimize the ellipse of uncertainty and reduce the risk of collision during drilling.
As the first dual lateral with lower completions in both laterals, this project sets a new standard within the company by advancing drilling practices and perfecting hydrocarbon extraction in the realm of multi-lateral wells. The well's success sets a benchmark for the Field Operator to drill more multilateral wells and further advance into TAML Level 4 and Level 5. Overall, the document provides a detailed account of the project's objectives, challenges, and outcomes, highlighting the technical expertise and innovation of the Field Operator team.
Advancements in Acid Gas Removal: A Novel Approach Using Minisorb, Custom-built Laboratory Simulators for Enhanced Efficiency and Cost Savings In Natural Gas Processing
Authors: Pahlepy R. , Suganda W. , Patrayudha A. , Hidayatullah A. , Demak R. , Famdiyazi A. , Rizky N. , Lasimpala A. , Saputra W. , Akbar R. 
Published: October 2024

Abstract
Amine solvent Methyldiethanolamine (MDEA) absorption method remains the most effective approach for removing acid gases: Hydrogen Sulfide (H2S) and Carbon Dioxide (CO2) from sour natural gas. Unfortunately, due to the process relying on chemical reactions, operational parameters become crucial for maintaining its effectiveness. Inaccuracies in these parameters and dynamic changes in chemical and process fluids can disrupt the process, leading to off-specification sales gas and ultimately revenue loss.
Donggi Matindok Field produces gas from a carbonate reservoir with a high content of CO2 impurities. Despite optimizing parameters from the plant's base design to accommodate dynamic changes caused by various factors during the carbon dioxide absorption process at the Acid Gas Removal Unit (AGRU), Donggi Matindok still experienced off-specification sales gas due to CO2 levels exceeding acceptable limits. To address this issue, the authors have developed "MiniSorb," a custom-built laboratory tool for simulating the actual acid gas absorption process in AGRU.
By replicating the real-time absorption process of amine solvent with the actual feed gas in a lab-scale ratio, the authors could analyze the current state of the absorption process and assess the effectiveness of the operating parameters in removing CO2 from the gas. Through iterations and adjustments, the optimal parameters for amine strength and temperature were determined to generate the most effective absorption reaction, subsequently implementing these findings in the actual plant process. As a result of implementing this method, Pertamina EP Cepu achieved a cost saving of USD 236k annually by avoiding off-specification sales gas and reducing fresh amine solvent usage.
This publication introduces a cost-effective, low-risk, and real-time tool for analyzing the effectiveness of acid gas absorption in the process. It also highlights its success in eliminating potential losses in gas sales due to CO2 off-specification in Donggi Matindok Field. The authors hope that this invention can be replicated for other gas processing plants facing similar conditions and problems.
Simulations of Interfacial Tension for H2/H2S/Water and CH4/H2S/Water Systems at the Temperature of 298 K and Pressure up to 30 MPa
Authors: Chang Qiuhao , Dempsey David , Huang Liangliang 
Published: October 2024

Abstract
In 2020, hydrogen production reached around 90 million metric tons (Mt) and this is expected to keep increasing year by year toward the global net-zero target. Traditional large-scale storage methods such as the cryogenic tank and salt caverns may eventually be unable to meet local requirements. It has been suggested that depleted hydrocarbon reservoirs with a large storage volume can accommodate larger-scale hydrogen production. However, the stored gas may co-exist with residual H2S in the depleted reservoir or H2S produced by geochemical reactions with the injected gas or microorganism activity. As gas mixture composition can affect the interfacial tension (IFT) between gas and residual pore water, the dynamics and fate of injected H2 in the depleted gas reservoir may, in part, be determined by H2S effects under reservoir conditions. In this study, the interfacial tensions of H2/H2S/water and CH4/H2S/water systems were determined as a function of gas concentration at 298 K and under different pressures. The results show that gas-water IFT with different H2S concentrations decreased as pressure increased from 10 to 14.5 MPa. For pressures higher than 14.5 MPa, the effect on gas-water IFTs was relatively smaller. Furthermore, the gas-water IFTs at a relatively lower temperature of 298 K were higher than those at 343 K with different H2S concentrations under the same pressure condition. In addition, our simulation results show that even a low H2S concentration of 10% would also affect IFT when using two other types of cushion gas: CO2 and N2. The contribution of this study is to provide IFT expressions for pore water with various gas mixtures involving CH4, H2, and H2S species under different pressure and temperature conditions for hydrogen storage in depleted hydrocarbon reservoirs.
Using Energy Balance in Porous Media to Determine Wettability
Authors: Zakariah A. , Blunt M. J. 
Published: October 2024

Abstract
Recent derivation of a thermodynamically consistent contact angle estimates from high-resolution 3D x-ray imaging has proven successful to determine rock wettability based on energy balance assumptions. This method involves computing the differences in interfacial areas and curvatures from images acquired during a waterflood displacement, which are highly sensitive to the image resolution and segmentation quality. In this study, three different wettability rock samples were analysed, namely (i) a water-wet Bentheimer sandstone, (ii) a mixed-wet Ketton limestone, and (iii) an oil-wet reservoir carbonate. The average thermodynamic contact angles for the water-wet, mixed-wet, and oil-wet rock samples were 48.5° ± 5°, 121° ± 15°, and 111° ± 10° respectively. This work extends its novelty approach to analyse the spatial wettability variations by discretising each rock sample into smaller sections along the flow direction. A wider range of contact angle was calculated in the water-wet sample; however, because of the tiny sample size, a supplementary study is needed to further evaluate the local rock heterogeneity. Although the same wettability alteration protocol was implemented for mixed-wet and oil-wet rock samples, the displacement exhibited different behaviours. Interestingly, waterflooding in the mixed-wet rock governed by wettability control, in which water preferentially invades the more water-wet and then the more oil-wet regions of the pore spaces, resulting in an increase trend of contact angle over time. On the other hand, the oil-wet case has a more consistent contact angle because the pore filling sequence was controlled by the pore size; therefore, water was filling the larger pores preferentially. Haines jump was observed in the oil-wet rock during the initial water displacement, resulting in the abrupt change of mean curvatures and capillary pressure. Positive curvatures and capillary pressure in water-wet rock measurements validated that oil bulges into the water, in contrast to the mixed-wet and oil-wet samples. For oil-wet case, capillary pressure has larger negative values, as compared to the mixed-wet, implying that water needs higher pressure to bulge into the oil in the pore spaces.
Technology of Using Existing Natural Gas Pipelines for Long Distance Hydrogen Storage and Transportation
Authors: Zhang Xi , Zhang Chenjun , Li Yiheng , Zhang Lin , Yu Huidi , Zhang Lanqiong , Liu Xiaodan , Miao Sheng , Wang Xiaoqi , Wang Shanyu , Jin Xu 
Published: October 2024

Abstract
The storage and transportation of hydrogen is a key link in the large-scale application of hydrogen. The current application mode of hydrogen is usually to produce hydrogen near the using units (such as oil refineries, fertilizer plants, etc.). In the future, the hydrogen energy industry will be based on scattered renewable energy, which will rely on long-distance and large-scale storage and transportation technology. Based on the advantages of existing infrastructure, blending hydrogen into natural gas pipeline networks is seen as a feasible solution for long-distance and low-cost hydrogen transportation. This paper summarizes the results of the desk research for mechanical properties of steels as a function of hydrogen pressure. Then the inspection and leakage detection methods are introduced. Through the technological analysis of hydrogen separation approaches, the paper explores the hydrogen supply chains. In an effort to provide a comprehensive outlook, the paper also outlines some inspirational pilot projects in the context of hydrogen blending and transport by existing or new pipelines. The technical evaluation method and future development of natural gas pipeline hydrogen transportation are discussed at the last section.
Intelligent Lifting System for Simultaneous Balance of Fluid Volume and Pumping Effciency in Low Permeability Reservoirs
Authors: Jianguo Xu , Hui Huang , Qiaochu Shen , Qinghai Yang , Shiqi Tian , Xingguo Yang , Zhuoyue Hui 
Published: October 2024

Abstract
Low-permeability reservoirs constitute a substantial proportion of global oil reserves. These reservoirs are characterized by complex geological conditions, high extraction difficulty, low productivity, and poor economic benefits. A significant issue faced in these reservoirs is the mismatch between the pumping speed of wells and the fluid supply capacity. This study introduces an intelligent artificial lift technology designed specifically for these reservoirs, focusing on optimizing both liquid volume and pump efficiency. The technology includes an integrated device for measuring liquid production and water cut, alongside a variable frequency intelligent speed control cabinet. Sensors ensure high accuracy, with liquid production errors of less than 3% and water cut errors less than 5%. The pump stroke of the pumping unit is calculated based on the motor operating frequency, ultimately determining the pump efficiency. The intelligent control system employs an economic benefit evaluation index, aiming to maximize pump efficiency while maintaining liquid production levels. This ensures operation with a reasonable pump stroke. Field trials in the Jilin Oilfield involved ten wells, showing promising results: a 23.4% average increase in pump efficiency, 42% reduction in motor frequency, and 1.8-stroke decrease in average pump stroke across six wells. For three more sensitive wells, pump stroke reductions led to smaller adjustments in efficiency (3.6% increase), frequency (9.8% decrease), and stroke (0.4-stroke decrease), maintaining stable liquid production. Overall, this technology achieved a 30% average reduction in power consumption compared to fixed frequency operations, demonstrating substantial energy savings. The field trials indicate that this technology can enhance pump efficiency while maintaining stable liquid production, with notable energy-saving effects. Future work will focus on integrating this technology with time-of-use electricity pricing and new energy generation to achieve more significant economic benefits.
Comparative Analysis of CO2 Resistant Slurry Design and Conventional Oil Well Cement: The Inaugural Step towards Sustainable Energy Transition
Authors: Lo R. L. , Ibrahim M. , Kelly P. , Lew R. , Gabel T. C. , Kumar A. K. , Lau C. H. , Toha R. 
Published: October 2024

Abstract
With the growing urgency of global climate issues, reducing carbon dioxide emissions has become a crucial component of the sustainable energy transition. Innovative technologies are receiving increased focus, with Carbon Capture and Storage (CCS) emerging as a promising solution to mitigate the environmental impacts of fossil fuel consumption and industrial emissions. As nations strive to meet ambitious carbon reduction targets, the exploration of effective CCS applications becomes paramount. However, despite the potential of CCS, significant challenges persist in its widespread implementations due to limited information especially on long term wellbore integrity. This paper aims to offer insights and provide a comparative analysis on how cementing designs being the key to wellbore integrity and long-term zonal isolation will be affected when exposed to carbon dioxide (CO2).
Extensive lab testing has been conducted comparing conventional API cement versus a CO2 resistant cement design that has been developed especially for wells with CO2 or CCS application for a period across one month. Both cementing designs were tested for mechanical properties, gas permeability, porosity, XRD and water analysis under non-CO2 exposure and CO2 exposure condition. Additional testing including thermogravimetric analysis (TGA), computed tomography (CT) scans and phenolphthalein testing were also performed on both the designs under CO2 exposure condition. To simulate the aging or extended exposure time of carbonic acid attack, acetic acid which is a stronger acid was chosen as the main acid catalyst to conduct solubility testing.
Through the month-long period, extensive data sets were gathered through a series of lab testing, providing insightful comparison of a conventional API cement and CO2 resistant cement design after being exposed to CO2. Both qualitative and quantitative data has provided interesting evidence that the conventional API cement goes through a more severe carbonation (i.e., CO2 attack) as compared to a CO2 resistant cement design. Analysis on each of the testing and observations done through the suite of test that was conducted shall be presented in greater detail within this paper.
As the energy industry navigates the imperative of reducing carbon footprints, the novel information presented in this paper aims to guide practitioners and researchers towards more effective and innovative cementing solutions. Ultimately, the incorporation of CO2 resistant cement slurry design signifies a pivotal step in fortifying wellbore integrity for CCS application.