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Journal articles on the topic 'OLGA Simulator'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Pramana, Astra Agus, and Yusuf Revy Fadillah. "ANALYSIS OF CORROSION IN PRODUCTION TUBING USING OLGA SIMULATOR." PETRO:Jurnal Ilmiah Teknik Perminyakan 11, no. 2 (2022): 47–51. http://dx.doi.org/10.25105/petro.v11i2.13719.

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Corrosion is a problem that occurs in the production system of industrial oil and gas. Control corrosion in tubing production is necessary for maintaining production and well direct as tubing production is the first contact with corrosion fluid and material agent. Corrosion is caused by a chemical reaction between a material and corrosion fluid. A corrosion rate prediction model can be used to predict its rate such as NORSOK and de Waard models. Both methods are used in Olga Simulator software by Schlumberger company that will be used in this paper. Some of the parameters and scenarios that in

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2

Shaharun, Azwan. "Integrated modelling of entire production network and topsides facilities for production optimisation of major oil and gas fields." APPEA Journal 53, no. 2 (2013): 474. http://dx.doi.org/10.1071/aj12085.

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An oil company sought to identify bottlenecks in three of their main oil and gas production networks. It was desired to, therefore, develop the entire production network from wells, flowlines, intra-field and inter-field pipelines, and export pipelines up to the onshore terminal first stage separator/slug catcher, all in the transient multi-phase-flow oil and gas (OLGA) simulator. Furthermore, the detailed topsides facilities were separately modelled in a process simulator. The OLGA and process simulator models were subsequently integrated, where the flow simulator model received boundary pres

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3

Sultan, Omar, Wiam Kharouba, and Hasan Eshreaf. "Simulation of the Dispersion of Carbon Dioxide During Accidental Releases from Gas Processing Facilities." مجلة الجامعة الأسمرية: العلوم التطبيقية 6, no. 5 (2021): 764–71. http://dx.doi.org/10.59743/aujas.v6i5.1332.

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Carbon capture and storage (CCS) from oil facilities is an important and effective way to reduce the concentration of carbon dioxide in the atmosphere. Consequently, gas-processing facilities will be dealing with a tremendous quantity of CO2 with high pressure. Therefore, the aim of this study is to simulate the dispersal of CO2 gas leakage from high-pressure pipelines of the gas-processing facilities. The modeling of CO2 leakage from pipelines at CCS process has been problematic because of the lack of appropriate source term models that handle the complex behavior of CO2 correctly during rele

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4

Tang, Hewei, William J. Bailey, Terry Stone, and John Killough. "A Unified Gas/Liquid Drift-Flux Model for All Wellbore Inclinations." SPE Journal 24, no. 06 (2019): 2911–28. http://dx.doi.org/10.2118/197068-pa.

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Summary Implementation of a drift–flux (DF) multiphase–flow model within a fully coupled wellbore/reservoir simulator is nontrivial because it must adhere to a number of strict requirements to ensure numerical robustness and convergence. The existing DF model that meets these requirements is only fully posed from 2° (from the horizontal) to upward vertical. Our work attempts to extend the current DF model such that it is numerically robust, accurate, and applicable to all well inclinations. To gauge accuracy, model parameterization used 5,805 experimental data points from a well–established da

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Yerlepessov, Murat U., Oleg I. Zaitsev, Abay A. Yermekov, Sain K. Amirov, and Zhuginis S. Urbisinov. "Testing the functionality of OLGA software for determining optimal oil transport modes to prevent solid particle deposition." Kazakhstan journal for oil & gas industry 6, no. 3 (2024): 82–93. http://dx.doi.org/10.54859/kjogi108728.

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Background: During operation, all mechanical impurities entering the collector through the flow lines settle at the bottom due to a decrease in flow velocity. This leads to a reduction in the capacity of the pipeline network, increased pressure, and premature equipment wear. To address this issue it is essential to understand the dynamics and intensity of sludge formation at the bottom of the pipeline. Aim: Evaluate the functionality and efficiency of the dynamic multiphase flow simulator in addressing challenges related to the transport of borehole fluid containing solid particles. Materials

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Oriji, Boniface A., and Raphael Odikpo Okeke. "Optimal Simulation and Mathematical Correlation of Mud Weight for Effective Wellbore Stability Management." European Journal of Engineering Research and Science 5, no. 1 (2020): 96–99. http://dx.doi.org/10.24018/ejers.2020.5.1.1688.

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Wellbore instability is a problem that affects drilling activities. It is therefore important to provide an optimal solution that prevents or reduces the occurrence of wellbore collapse and not compromise the integrity of the well. In this study, work was done to assess the impact of several parameters including tubing pressure, tubing fluid temperature, length of tubing, gas density, liquid density, tubing hold-up and total mass flow on mass fraction of tubing muds were considered. Data points for this investigation were obtained using OLGA multiphase simulator. The results of the simulation

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Oriji, Boniface A., and Raphael Odikpo Okeke. "Optimal Simulation and Mathematical Correlation of Mud Weight for Effective Wellbore Stability Management." European Journal of Engineering and Technology Research 5, no. 1 (2020): 96–99. http://dx.doi.org/10.24018/ejeng.2020.5.1.1688.

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Wellbore instability is a problem that affects drilling activities. It is therefore important to provide an optimal solution that prevents or reduces the occurrence of wellbore collapse and not compromise the integrity of the well. In this study, work was done to assess the impact of several parameters including tubing pressure, tubing fluid temperature, length of tubing, gas density, liquid density, tubing hold-up and total mass flow on mass fraction of tubing muds were considered. Data points for this investigation were obtained using OLGA multiphase simulator. The results of the simulation

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8

Seyfaee, A., M. Lashkarbolooki, F. Esmaeilzadeh, and D. Mowla. "Investigation of the Effect of Insulation on Wax Deposition in an Iranian Crude Oil Pipeline with OLGA Simulator." Journal of Dispersion Science and Technology 33, no. 8 (2012): 1218–24. http://dx.doi.org/10.1080/01932691.2011.605649.

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9

Pramana, A. A., and M. I. Afif. "Utilization of Rice Straw Extract as Corrosion Inhibitor to Decreasing Effect of Elevation on CS Pipeline using Olga Simulator." IOP Conference Series: Earth and Environmental Science 1187, no. 1 (2023): 012023. http://dx.doi.org/10.1088/1755-1315/1187/1/012023.

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Abstract In many infrastructure of oil and gas industries, corrosion is one of the most problems that often occur, especially in pipelines. Corrosion is caused by an electrochemical reaction between material surface and corrosion fluid. This problem will affect the economy, safety, and conservation. In this case, we should give a solution such as a method or tools to minimize corrosion’s effect so, it can improve safety and minimize the potential problems caused by corrosion and loss more cost. One of the ways is using organic corrosion inhibitors such as biomass agriculture waste and plant ex

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10

Pramana, A. A., and Y. R. Fadillah. "Analysis of Corrosion in Production Tubing Using Monoethylene Glycol and Red Ginger as Inhibitors." IOP Conference Series: Earth and Environmental Science 1187, no. 1 (2023): 012039. http://dx.doi.org/10.1088/1755-1315/1187/1/012039.

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Abstract The production system for industrial oil and gas is susceptible to corrosion, which must be controlled in order to sustain production and well direct as the production of tubing is the initial point of contact with the corrosion fluid and material agent. A chemical reaction between corrosive materials and fluids results in corrosion. Due to its mechanical characteristics, stainless steel has a wide range of uses in the building, chemical, and structural sectors. To combat corrosion issues, several chemical inhibitors are used, and numerous studies are actively working to develop organ

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11

Carducci, Francesco, Antonio Del Monaco, Giancarlo Giacchetta, Mariella Leporini, and Barbara Marchetti. "Development and application of an innovative tool to automate the process of results extraction from the thermo-hydraulic simulator Olga." Petroleum 1, no. 2 (2015): 164–68. http://dx.doi.org/10.1016/j.petlm.2015.06.003.

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12

Anuar, Astriyana, Ismail M Saaid, Petrus Tri Bhaskoro, and Rohaizad M Norpiah. "NON-NEWTONIAN VISCOSITY BEHAVIOUR INVESTIGATION FOR MALAYSIAN WAXY CRUDE OILS AND IMPACT TO WAX DEPOSITION MODELLING." IIUM Engineering Journal 24, no. 2 (2023): 184–208. http://dx.doi.org/10.31436/iiumej.v24i2.2736.

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Wax deposition is one of the major risks that causes a serious threat to pipeline transportation during operation, if not prevented. The remediation actions are usually costly; hence mitigation methods are in place to completely avoid the issues from happening. The wax deposition modelling technique has been accepted as a tool to design and continuously optimize the wax management strategy. Non-Newtonian oil-wax viscosity is an important parameter affecting wax deposition in pipelines. The present and widely used viscosity model assumes exponential behaviour as observed in the emulsion system.

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13

Seo, Youngjin, Byoungjun Kim, Joonwhoan Lee, and Youngsoo Lee. "Development of AI-Based Diagnostic Model for the Prediction of Hydrate in Gas Pipeline." Energies 14, no. 8 (2021): 2313. http://dx.doi.org/10.3390/en14082313.

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For the stable supply of oil and gas resources, industry is pushing for various attempts and technology development to produce not only existing land fields but also deep-sea, where production is difficult. The development of flow assurance technology is necessary because hydrate is aggregated in the pipeline and prevent stable production. This study established a system that enables hydrate diagnosis in the gas pipeline from a flow assurance perspective. Learning data were generated using an OLGA simulator, and temperature, pressure, and hydrate volume at each time step were generated. Stacke

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14

Wun Moh, Hsiao, Erni Dharma Putra, and Rahel Yusuf. "Application of dynamic simulation to assess the effectiveness of well clean-up in a horizontal gas well." APPEA Journal 57, no. 2 (2017): 617. http://dx.doi.org/10.1071/aj16246.

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Well clean-up operation involves the removal of drilling and completion fluids from the wellbore before diverting the well to production facilities. Natural flow clean-up is preferred due to its relatively low cost and simplicity. Depending on the weight of the initial contents in the wellbore and the reservoir properties, artificial lift assisted clean-up such as nitrogen injection through coiled tubing may be required for some wells to ensure the well clean-up objectives are achieved. Well clean-up is transient in nature thus necessitating the need for a dynamic simulation approach to assess

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15

Ogazi, A. I. I., Y. Cao, H. Yeung, and L. Lao. "Slug Control With Large Valve Openings To Maximize Oil Production." SPE Journal 15, no. 03 (2010): 812–21. http://dx.doi.org/10.2118/124883-pa.

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Summary Severe slugging in an offshore riser pipeline imposes a major challenge to production and flow assurance in the oil and gas industry. Riser-top-valve choking has shown effectiveness in eliminating severe slugging. However, most manual-choking and active-control techniques were tuned by trial and error, resulting in an operation at a smaller-than-necessary valve position for a stable-flow condition. This imposes unnecessarily high backpressure on the riser pipeline, which leads to reduction in production. One way to overcome this problem is to design the active-control system to operate

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16

Carpenter, Chris. "Study Investigates Foam Use for Control of Pipeline Slugging." Journal of Petroleum Technology 74, no. 11 (2022): 89–92. http://dx.doi.org/10.2118/1122-0089-jpt.

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_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper IPTC 22235, “Foams To Control Slugging Issues in Pipelines—From Laboratory to Simulation,” by Ivy C.C. Hsia, Bishop Falope, and Nor Hadhirah Halim, Petronas, et al. The paper has not been peer reviewed. Copyright 2022 International Petroleum Technology Conference. Reproduced by permission. _ In one of the operator’s Malaysian fields, hydrodynamic slugging, or two-phase liquid/gas flow instability in the pipeline, has caused losses in flow capacity and intense vibration at the separator, leading to in

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17

Qu, Anqi, Luiz F. R. Dalla, Luis E. Zerpa, et al. "Comparative Study of OLGA and LedaFlow Models for Mechanistic Predictions of Hydrate Transport Dynamics." Energies 17, no. 23 (2024): 6101. https://doi.org/10.3390/en17236101.

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Gas hydrate formation in pipelines transporting multiphase fluids from petroleum reservoirs can lead to the formation of blockages, representing a significant flow assurance challenge. Key issues caused by hydrates include substantial increases in the viscosity of mixed liquid phases and the deposition of hydrates on the pipeline wall. This study compares two existing transient multiphase flow simulators, OLGA and LedaFlow, in terms of their estimation of hydrate formation effects on multiphase flow. Here, we compared in detail the hydrate kinetic models, parameters used, and initial condition

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18

Wang, Guoqing, Changquan Wang, and Lihong Shi. "CO2 Corrosion Rate Prediction for Submarine Multiphase Flow Pipelines Based on Multi-Layer Perceptron." Atmosphere 13, no. 11 (2022): 1833. http://dx.doi.org/10.3390/atmos13111833.

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The implementation of corrosion detection in submarine pipelines is difficult, and a combined PCA-MLP prediction model is proposed to improve the accuracy of corrosion prediction in submarine pipelines. Firstly, the corrosion rate of a submarine multiphase flow pipeline in the South China Sea is simulated by the De Waard 95 model in the multiphase flow transient simulation software OLGA and compared with the actual corrosion rate; then, according to the corrosion data simulated by OLGA, principal component analysis (PCA) is used to reduce the dimensionality of the corrosion factors in the pipe

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19

Oliveira, Rafael Tsukamoto, and Mariana Barbieri Vassoler. "Os Lusíadas na Rússia: entrevista com Olga Ovtcharenko." Revista Desassossego 15, no. 29 (2023): 381–87. http://dx.doi.org/10.11606/issn.2175-3180.v15i29p381-387.

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Olga Ovtcharenko é tradutora e pesquisadora das literaturas russa e portuguesa. Graduou-se em 1976 pela Universidade Estatal de Moscou, também conhecida como Lomonóssov, na Faculdade de Letras onde posteriormente lecionou, entre os anos 80-90. Entre os anos de 1984 e 87, lecionou língua e literatura russa na Universidade de Coimbra, em Portugal. Atua principalmente nas áreas de teoria literária do século XX, de história das literaturas portuguesa e russa, e de literatura comparada. Desde o fim dos anos 90, Ovtcharenko tem se dedicado à tradução de uma série de clássicos da literatura portugues

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20

Ganat, T. A., M. Hrairi, and MNA Hawlader. "Validation of ESP Oil Wells Measured Parameters Using Simulation Olga Software." IOP Conference Series: Materials Science and Engineering 184 (March 2017): 012057. http://dx.doi.org/10.1088/1757-899x/184/1/012057.

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Zhao, Shuai, Kexi Liao, Zhuoting Chen, and Feilong Zhou. "Study on corrosion mechanism of the weld seam of submarine pipeline’s spool." E3S Web of Conferences 121 (2019): 03006. http://dx.doi.org/10.1051/e3sconf/201912103006.

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This paper studies the corrosion mechanism of the weld seam of the submarine pipeline’s spool. The types and causes of inner tube weld corrosion are simulated by EDX and XRD analysis of the on-site pipe corrosion products, combined with OLGA Software simulation pipeline flow pattern. The tensile testing, impact testing and hardness testing were carried out on the base metal and the weld by tensile tester, pendulum impact tester and Brinell hardness tester to analyze the mechanical properties of the base metal and the weld; the microstructural difference between the weld and the base metal were

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22

Ferretto, William, Igor Matteo Carraretto, Andrea Tiozzo, Marco Montini, and Luigi Pietro Maria Colombo. "Horizontal Stratified Air–Foam–Water Flows: Preliminary Modelling Attempts with OLGA." Fluids 8, no. 3 (2023): 89. http://dx.doi.org/10.3390/fluids8030089.

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Water accumulation is a major problem in the flow assurance of gas pipelines. To limit liquid loading issues, deliquification by means of surfactant injection is a promising alternative to the consolidated mechanical methods. However, the macroscopic behavior of foam pipe flow in the presence of other phases has barely been explored. The goal of this work was to propose an approach to simulate air–water–foam flows in horizontal pipes using OLGA by Schlumberger, an industry standard tool for the transient simulation of multiphase flow. The simulation results were compared with experimental data

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Prakash, Monika, and Atef Abdrabou. "On the Fidelity of NS-3 Simulations of Wireless Multipath TCP Connections." Sensors 20, no. 24 (2020): 7289. http://dx.doi.org/10.3390/s20247289.

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The multipath transmission control protocol (MPTCP) is considered a promising wireless multihoming solution, and the 3rd generation partnership project (3GPP) includes it as a standard feature in the fifth-generation (5G) networks. Currently, ns-3 (Network Simulator-3) is widely used to evaluate the performance of wireless networks and protocols, including the emerging MPTCP protocol. This paper investigates the fidelity of the Linux kernel implementation of MPTCP in the ns-3 direct code execution module. The fidelity of MPTCP simulation is tested by comparing its performance with a real Linux

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Weerakul, Sarita, Naravit Leaukosol, Derek H. Lister, Shintaro Mori, and Wolfgang Hater. "Effects on Flow-Accelerated Corrosion of Oleylpropanediamine Under Single-Phase Water Conditions Pertinent to Power Plant Feedwater." Corrosion 76, no. 2 (2019): 217–30. http://dx.doi.org/10.5006/3225.

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Studies of the effects of the film-forming amine oleylpropanediamine (OLDA), with and without auxiliary alkalizing agents, on flow-accelerated corrosion (FAC) were performed in high-pressure, high-temperature recirculating water loops. Those loops were equipped with experimental probes to monitor FAC in situ. Experiments were performed at simulated power plant conditions in single-phase water at 140°C. The results showed that OLDA reduced FAC to a greater extent than the associated pH effect. The protective film apparently consisted of several layers and survived for several days after OLDA wa

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Khalaf, S., and M. I. Gad. "Optimal well locations using genetic algorithm for Tushki Project, Western Desert, Egypt." Hydrology and Earth System Sciences Discussions 11, no. 10 (2014): 11395–438. http://dx.doi.org/10.5194/hessd-11-11395-2014.

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Abstract. Groundwater depletion is one of the most important problems threaten the national projects in Egypt. The optimal distribution of well locations and pumping rates mitigate this problem. In this paper, a trial to mitigate this problem in Tushki National Project, south western desert, Egypt was carried out via delineating the optimal well locations and optimal pumping rates. The methodology of combination between simulation and optimization techniques was applied. A linked simulation-optimization model for obtaining the optimum management of groundwater flow is used in this research. MO

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Yao, Bin, Deyin Zhao, Zhi Zhang, and Cheng Huang. "Safety Study on Wax Deposition in Crude Oil Pipeline." Processes 9, no. 9 (2021): 1572. http://dx.doi.org/10.3390/pr9091572.

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The Shunbei crude oil pipeline is prepared to use the unheated transportation process to transport waxy crudes. However, the wax formation in the pipeline is unknown. In order to predict the wax deposition of the pipeline, the physical property experiment of Shunbei crude oil was carried out through field sampling. The density, freezing point, hydrocarbon composition, and viscosity–temperature characteristics of crude oil are obtained. The cloud point and wax precipitation characteristics of the crude oil were obtained using the differential scanning calorimetry (DSC) thermal analysis method.

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He, Zhaoyang, Limin He, Haixiao Liu, Dan Wang, Xiaowei Li, and Qingping Li. "Experimental and Numerical Study on Gas-Liquid Flow in Hilly-Terrain Pipeline-Riser Systems." Discrete Dynamics in Nature and Society 2021 (April 29, 2021): 1–15. http://dx.doi.org/10.1155/2021/5529916.

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In offshore oil and gas transport, gas-liquid mixed transport is a basic flow phenomenon. In general, pipeline undulations are caused by seabed topography; therefore, it is of great significance to study the mechanisms underlying gas and liquid flows in hilly-terrain pipeline-riser systems. This study established a hilly-terrain pipeline-riser experimental system in an indoor laboratory. The flow pattern and its flow mechanism were studied via experimental observation and pressure detection. Experimental results showed that the gas-liquid flow pattern in the hilly-terrain pipeline-riser system

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Woitowicz, Karina Jans, та Valéria Laroca. "OLHARES DE GˆˆÊNERO SOBRE A PANDEMIA DE COVID-19:". Vozes e Diálogo 21, № 1 (2023): 84–94. http://dx.doi.org/10.14210/vd.v21n1.p84-94.

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O presente artigo apresenta os resultados da pesquisa de Iniciação Científica realizada junto ao Grupo de Pesquisa Jornalismo e Gênero da Universidade Estadual de Ponta Grossa que teve como tema a cobertura jornalística de veículos com viés feminista sobre o período da pandemia de Covid-19 no Brasil. Foram analisadas de forma qualitativa 32 reportagens produzidas pelo portal AzMina e 8 reportagens do Think Olga de janeiro a dezembro de 2020, a partir de critérios envolvendo aspectos próprios das produções. A pesquisa teve como objetivo principal demonstrar como o jornalismo alternativo e com e

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Mnasri, Hamdi, Amine Meziou, Matthew A. Franchek, et al. "Low Pressure Experimental Validation of Low-Dimensional Analytical Model for Air–Water Two-Phase Transient Flow in Horizontal Pipelines." Fluids 6, no. 6 (2021): 220. http://dx.doi.org/10.3390/fluids6060220.

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This paper presents a low-pressure experimental validation of a two-phase transient pipeline flow model. Measured pressure and flow rate data are collected for slug and froth flow patterns at the low pressure of 6 bar at the National University of Singapore Multiphase Flow Loop facility. The analyzed low-dimensional model proposed in comprises a steady-state multiphase flow model in series with a linear dynamic model capturing the flow transients. The model is based on a dissipative distributed parameter model for transient flow in transmission lines employing equivalent fluid properties. Thes

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Liang, Chengyu, Wei Xiong, Hu Wang, and Zhiwen Wang. "Experimental and OLGA Modeling Investigation for Slugging in Underwater Compressed Gas Energy Storage Systems." Applied Sciences 13, no. 17 (2023): 9575. http://dx.doi.org/10.3390/app13179575.

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Underwater compressed gas energy storage (UW-CGES) holds significant promise as a nascent and viable energy storage solution for a diverse range of coastal and offshore facilities. However, liquid accumulation in underwater gas pipelines poses a significant challenge, as it can lead to pipeline blockages and energy transmission interruptions and adversely impact pipeline operation. In this paper, experimental and Oil and Gas Assays (OLGA) simulation studies have been conducted on the formation process of slug flow in pipelines. Firstly, experiments are conducted to capture high-speed camera im

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Ali, Sajedian, Mohaghegh Shahab, Kenoth Sasidharan Adiyodi, et al. "AI-Based Smart Proxy Models for Accurate Oil Rate Prediction and Efficient Pipeline Monitoring." Annals of Marine Science 8, no. 1 (2024): 042–54. http://dx.doi.org/10.17352/ams.000048.

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This research develops an advanced AI-based smart proxy model to significantly enhance the prediction of oil rates and the monitoring of crucial operational parameters such as temperature and pressure in oil field pipeline management. By integrating real-time data from Multiphase Flow Meters (MPFM) with sophisticated simulation outputs, the study introduces a dual-model approach that overcomes the limitations of traditional methods, improving both efficiency and cost-effectiveness. Model 1 employs high-precision real-time MPFM data to provide accurate oil rate predictions. By focusing on criti

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Jedliński, Łukasz. "Influence of the movement of involute profile gears along the off-line of action on the gear tooth position along the line of action direction." Eksploatacja i Niezawodnosc - Maintenance and Reliability 23, no. 4 (2021): 736–44. http://dx.doi.org/10.17531/ein.2021.4.16.

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When gears change their distance along the off-line of action (OLOA) direction, this affects the distance between the working surfaces of the meshing teeth along the line of action (LOA). This effect is usually neglected in studies. To include this effect precise equations are derived for spur gears. The analysis is carried out for the general case of spur gears with shifted profiles frequently used in the industry. The influence of OLOA gear displacement on LOA direction is also a function of gears parameters. An analysis is conducted, and the impact of parameters such as module, pressure ang

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Bolshakova, Alla. "Russian Culture as a Subject of Research in Philosophy." Polylogos 7, no. 4 (26) (2023): 0. http://dx.doi.org/10.18254/s258770110029273-2.

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The subject of the article is the interpretation of Russian culture by modern philosophical thought. The main attention is paid to a new monograph by Olga A. Zhukova, professor at the HSE University. The task of the author of the article is to consider the peculiarities of the methodological approaches to the study of the cultural heritage of Russia (especially the idealocentric ones), as well as individual research samples, which reveal the main idea of the book about the deep semantic interactions of creativity and religiosity in the artistic, philosophical, socio-political consciousness of

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Santoso, Samuel Bagas Wahyu, Andy Noorsaman Sommeng, and Cindy Dianita. "The Effect of Heat Tracing Installation for Wax Prevention on Onshore Buried Swampy Pipelines." Jurnal Rekayasa Kimia & Lingkungan 19, no. 1 (2024): 81–94. http://dx.doi.org/10.23955/rkl.v19i1.37754.

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Transporting crude oil using pipelines is a widely adopted method globally. In one segment owned by PT. XYZ, especially in swampy areas, the fluid temperature tends to drop below the wax appearance temperature (WAT) during oil transportation. This is due to the relatively low temperature in swamp areas caused by heat loss to the environment. The solubility of paraffin in crude oil drastically decreases as fluid temperature drops, causing wax molecules to precipitate and deposit on the cold pipe walls. PT. XYZ employs chemical treatment by adding a pour point depressant (PPD) to lower the pour

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Uzoigwe, Ndidi Emeka, Isaac Eze Ihua Maduenyi, and Seth Uba Wadike. "Evaluation of the Impact of Monoethylene Glycol and Methanol on Induction Time Performance." International Journal of Advances in Engineering and Management 7, no. 3 (2025): 473–79. https://doi.org/10.35629/5252-0703473479.

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This study evaluates the effects of monoethylene glycol (MEG) and methanol on hydrate induction time, focusing on optimizing inhibitor concentrations to mitigate hydrate-related risks. Using Multiflash for fluid characterization and OLGA for multiphase flow simulations, the hydrate induction time was first assessed in an uninhibited system before introducing MEG and methanol at varying concentrations. The results indicate that increasing MEG and methanol concentrations generally reduces induction time, with a 10 mole% concentration of either inhibitor effectively preventing hydrate formation t

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Wang, Chuan, Xueliang Zhang, and Huachuan Liu. "State estimation and slug flow control of subsea production systems." Journal of Computing and Electronic Information Management 10, no. 1 (2023): 39–45. http://dx.doi.org/10.54097/jceim.v10i1.5360.

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The simulation and control of the severe slugging flow in the subsea multiphase pipeline is the focus of research in the production and exploitation of oil companies. Severe slug flow results in severe fluctuations of pressure and flow rate at both the wells end and the receiving host processing facilities, causing safety and shutdown risks. To prevent the severe slugging flow regime in multiphase transport pipelines, an ODE model is established by using the mass conservation law for individual phases in the pipeline and the riser sections. Then, the proposed model is compared to the results f

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Gubanova, Tatiyana, and Anfisa Paliy. "The effect of negative air temperatures and humidity on the photosynthetic apparatus functioning in some species of Oleaceae family." BIO Web of Conferences 47 (2022): 11002. http://dx.doi.org/10.1051/bioconf/20224711002.

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The characteristics of the photosynthetic apparatus functioning in the leaves of some evergreen species of Oleaceae family depending on the cold periods` weather conditions on the southern coast of Crimea are presented in this work. It has been revealed that changes in PSII are species-specific. Low air humidity in combination with negative air temperature promotes a significant decrease in frost resistance in the studied Olea and Osmantus genotypes. However, in Olea europea genotypes, changes in the PSII parameters under the simulation of winter desiccation approximated sublethal limits. The

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Krichak, Simon O., Pinhas Alpert, and Melina Dayan. "The Role of Atmospheric Processes Associated with Hurricane Olga in the December 2001 Floods in Israel." Journal of Hydrometeorology 5, no. 6 (2004): 1259–70. http://dx.doi.org/10.1175/jhm-399.1.

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Abstract Over the period from 0000 UTC 3 December to 0000 UTC 5 December 2001, heavy rains fell in northern Israel. Intensity of the rainfall in some areas exceeded 250 mm (24 h)−1. Results of an investigation of the case including back-trajectory evaluations, numerical simulation experiments, and a potential vorticity (PV) analysis are presented. It is demonstrated that the unusual eastern Mediterranean process has been initiated by the formation of a tropical storm that later became Hurricane Olga from 25 to 29 November. The consequent synoptic processes were associated with the development

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Jahanian, Mohadese, Amin Ramezani, Ali Moarefianpour, and Mahdi Aliari Shouredeli. "Gas pipeline leakage detection in the presence of parameter uncertainty using robust extended Kalman filter." Transactions of the Institute of Measurement and Control 43, no. 9 (2021): 2044–57. http://dx.doi.org/10.1177/0142331221989117.

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One of the most significant systems that can be expressed by partial differential equations (PDEs) is the transmission pipeline system. To avoid the accidents that originated from oil and gas pipeline leakage, the exact location and quantity of leakage are required to be recognized. The designed goal is a leakage diagnosis based on the system model and the use of real data provided by transmission line systems. Nonlinear equations of the system have been extracted employing continuity and momentum equations. In this paper, the extended Kalman filter (EKF) is used to detect and locate the leaka

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A., Sathish, and Aravind Babu L.R. "Analyzing the Efficiency of Algorithm for Routing and Data Transmission in Wireless Sensor Networks." ACCST RESEARCH JOURNAL XX, no. 2, April 2022 (2022): 26–35. https://doi.org/10.5281/zenodo.7310104.

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                  Wireless Sensor Networks (WSNs) comprises a massive set of sensor nodes undergo random deployment in the target region to observe the physical parameters. The sensor nodes in WSN are constrained in energy, transmission power, storage, and computation abilities. Several studies ensured that the energy spent for data transmission is significantly higher than sensing and processing.  Design of effective routing mechanism in WSN finds helpful to reduce the energy consumption in throughout the network. Several approaches are availa

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Dengaev, Alexey, Vladimir Shishulin, Ilya Drozdov, et al. "Mechanical Impurities Carry-Over from Horizontal Heavy Oil Production Well." Processes 11, no. 10 (2023): 2932. http://dx.doi.org/10.3390/pr11102932.

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Currently, a global attention has been paid to the development and exploitation of shallow depth heavy oil reservoirs. Such oilfields are rationally developed via a network of horizontal wells. However, the weakly cemented reservoir rock beds lead to the high sand production during well flow. Removing mechanical impurities is still challenging even with the application of sophisticated techniques and a variety of filters. In this study, we propose an analysis method for describing the removal of mechanical impurity particles from horizontal wells containing heavy oil. We employed a simulation

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ATASOY TANRIKULU, Umare. "Action for Annulment of Savings Due to Simulation." Ankara Üniversitesi Hukuk Fakültesi Dergisi 71, no. 3 (2022): 911–35. http://dx.doi.org/10.33629/auhfd.1133765.

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İcra takiplerinde borçlunun, takip başlatılmadan önce veya takip başlatıldıktan sonra, ancak hacizden önce elinden çıkarttığı malvarlıkları bakımından, bu tasarruflarını sınırlandıracak herhangi bir kısıtlama bulunmamaktadır. Bununla birlikte; alacaklının, borçluya karşı yapmış olduğu icra takibinin, alacağına kavuşamayarak sonuçsuz kalması ve başarısızlığa uğramasıyla, alacaklıya İİK m.277 vd. hükümleri uyarınca borçlunun elinden çıkarmış olduğu malvarlıkları bakımından iptal davası açma hakkı tanınmıştır. Alacaklı, kendisinden mal kaçırmak isteyen kötü niyetli borçlunun elinden çıkardığı mal

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YİĞİT, Yasin. "Yüksek Din Öğretiminin Manevi Sağlık ve Hayata Yönelim Üzerine Etkisi: Iğdır Üniversitesi İlahiyat Fakültesi Örneği." Harran Theology Journal, no. 50 (December 15, 2023): 119–40. http://dx.doi.org/10.30623/hij.1325238.

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Bu araştırmada Türkiye’de yüksek din öğretimi yapılan bir kurum olan ilahiyat fakültesi öğrencilerinin manevi sağlık ve hayata yönelimleri ele alınmıştır. Bu kapsamda çalışmada maneviyat, manevi sağlık ve hayata yönelimle ilgili literatür taranmış ve katılımcılardan veriler toplanarak değerlendirilmiştir. Maneviyat literatürde (i) Bireylerin kutsalı, aşkın olanı tecrübesi, (ii) kendi kutsal kökenlerinin farkında olması, (iii) kendi özü, diğer insanlar ve varlıklarla bütünleşik olma hissi, (iv) ahlâkî ve manevî/dinî prensipleri içselleştirmeye çalışma gibi anlamlarda kullanılır. Manevi sa

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Rocha, Felipe Ferreira de Oliveira. "Olha no Google! Usando o Google Trends para Analisar a PEB." Revista Política Hoje 29, no. 1 (2021): 234–51. http://dx.doi.org/10.51359/1808-8708.2020.241412.

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O artigo possui objetivo duplo: a) discutir a importância de se incorporar dados empíricos ao realizar análises sobre a Política Externa Brasileira; b) demonstrar os limites e as possibilidades por trás da utilização de uma plataforma de acesso público e livre para a coleta de dados que podem servir como indicadores essenciais para se entender a inserção internacional do Brasil. Nesse sentido, buscamos estimular o uso consciente e cauteloso de ferramentas como o Google Trends em análises acadêmicas. Para isso, primeiro, demonstramos a situação de escassez de dados empíricos na análise da Polít

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Schütze, Julia, Stephan D. Ewert, Christoph Kirsch, and Birger Kollmeier. "Speech intelligibility and hearing aid benefit in a living room: Comparison of real and simulated acoustics." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A115. http://dx.doi.org/10.1121/10.0022969.

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For hearing-impaired patients, a disparity between hearing aid benefit determined by conventional audiological assessment and observed in everyday life has been reported. Hence, ecologically valid testing methods to better reflect performance in real-world scenarios are required. Hereby, the living room is a highly relevant (home) environment for speech communication involving various target and interfering sources. This study examines speech intelligibility in an average German living room with a connected kitchen and acoustic reproductions of the real room using loudspeakers. Speech recognit

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Zhang, Bao, Hongtao Jing, Chongfeng Wang, et al. "Simulation and Analysis of Temperature and Pressure Fields in the Wellbore of Self-Injection Well." Academic Journal of Science and Technology 11, no. 1 (2024): 97–104. http://dx.doi.org/10.54097/m6dv9h82.

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Aiming at the problem of wellbore waxing in high-temperature, high-pressure and highly-waxed deep gas condensate reservoirs, a wellbore temperature/pressure field prediction model for self-injection wells was established with the site parameters of the Bozi gas condensate field in the Tarim Basin of China using the OLGA software. With the help of the parameters of example wells on site in the Bozi, wellbore temperature and pressure in the process of gas extraction from 10 self-injector wells were predicted, and the following findings were obtained: the temperature decreases gradually in the pr

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Shpilevaya, A., A. Polbin, and S. Sinelnikov-Murylev. "Simulation Analysis of an OLG Model with Heterogeneous Preferences and Learning Abilities." Higher School of Economics Economic Journal 28, no. 1 (2024): 44–80. http://dx.doi.org/10.17323/1813-8691-2024-28-1-44-80.

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Bryantseva, Zhanna, Irina Akulova, Alexander Emelyanov, et al. "Abstract P5-01-03: Boost delivery to the tumor bed in breast cancer patients who have achieved pCR confirmed by VAB without surgery." Clinical Cancer Research 31, no. 12_Supplement (2025): P5–01–03—P5–01–03. https://doi.org/10.1158/1557-3265.sabcs24-p5-01-03.

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Abstract Purpose: We evaluate various approaches to target volume definition and boost delivery in breast cancer patients with pCR after neoadjuvant systemic therapy (NST) who were treated by radiotherapy without a surgery. Materials and methods: A pathological complete response (pCR) was diagnosed in 20 of 27 patients included in "surgery de-escalation" prospective observation study. Clips were placed in the primary tumor volume (PrTV) before NST and during the vacuum aspiration biopsy after NST. Twenty patients with pCR underwent the whole breast irradiation and a boost to the PrTV. High-dos

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Metzger, Sabine. "Eary Doubles: Tympanic Mechanisms and Cochlear Structures in Nabokov's Ada." Nabokov Studies 18, no. 1 (2022): 53–65. http://dx.doi.org/10.1353/nab.2022.a901979.

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Abstract: As this paper will show, Ada 's bizarre telecommunication devices are far more than technical solutions of the problems imposed by Antiterran ban of electricity. Ada foregrounds their operation mode in terms of transmission and transduction, and, with it, what Jonathan Sterne identifies as sound reproduction devices' "tympanic principle" that simulates the mechanism of the human eardrum. Whether hand-cranked, operating on fluids like Olga Veen's bizarre invention and its offspring, the aquaphone, or on modulated current – Ada 's telecommunication devices are based on the tympanic pri

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Di Paola, Arianna, Maria Vincenza Chiriacò, Francesco Di Paola, and Giovanni Nieddu. "A Phenological Model for Olive (Olea europaea L. var europaea) Growing in Italy." Plants 10, no. 6 (2021): 1115. http://dx.doi.org/10.3390/plants10061115.

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The calibration of a reliable phenological model for olive grown in areas characterized by great environmental heterogeneity, like Italy, where many varieties exist, is challenging and often suffers from a lack of observations, especially on budbreak. In this study, we used a database encompassing many phenological events from different olive varieties, years, and sites scattered all over Italy to identify the phases in which site-enlarged developmental rates can be well regressed against air temperature (Developmental Rate function, DR) by testing both linear and nonlinear functions. A K-fold

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