The present research evaluates the operational status of hydrodesulphurization oil processing based on the monitoring of the feed oil filtration system. The system is identified as a prognostic module, designed to predict the remaining catalyst activity in the trickle bed reactor. The influence of the oil feeding flow rate of the process was evaluated with focus on the level of activity of the catalyst bed of the reactor affected by content of soluble and fine contaminants of fed oil. During an operation campaign (45 days) of the HDS unity (filter, reactor) variations of LHSV (0.5 – 1.5 h-1) and pressure differential in the filter (110 – 200 Mpa) reflected in the reactor, where the activity of the catalyst diminished from 60 % to 54.0 %. The predictions, extrapolated to 700 campaign days, indicated a catalyst deactivation of about 50%, allowing a conversion of sulfur compounds around 43% to be maintained.
{"title":"OPERATIONAL ASSESSMENTS TO IMPROVE THE MONITORING OF PETROLEUM CATALYTIC HYDRODESULFURIZATION PROCESSING","authors":"M. Abreu, C. Abreu","doi":"10.5419/bjpg2020-0001","DOIUrl":"https://doi.org/10.5419/bjpg2020-0001","url":null,"abstract":"The present research evaluates the operational status of hydrodesulphurization oil processing based on the monitoring of the feed oil filtration system. The system is identified as a prognostic module, designed to predict the remaining catalyst activity in the trickle bed reactor. The influence of the oil feeding flow rate of the process was evaluated with focus on the level of activity of the catalyst bed of the reactor affected by content of soluble and fine contaminants of fed oil. During an operation campaign (45 days) of the HDS unity (filter, reactor) variations of LHSV (0.5 – 1.5 h-1) and pressure differential in the filter (110 – 200 Mpa) reflected in the reactor, where the activity of the catalyst diminished from 60 % to 54.0 %. The predictions, extrapolated to 700 campaign days, indicated a catalyst deactivation of about 50%, allowing a conversion of sulfur compounds around 43% to be maintained.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"31 1","pages":"001-006"},"PeriodicalIF":0.0,"publicationDate":"2020-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82804364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. D. A. Albuquerque, M. C. Souza, J. G. O. Marinho, L. M. T. D. Oliveira
Among the equipments used in the separation of water from oil, bed coalescers stands out. Even after decades of bed coalescer development, the role of some variables, such as apparatus inclination, in its behavior remains underexplored within the field. Thus, using the ANSYS CFX 13.0 software, a modeling was proposed to determine the influence of bed coalescer inclination in the separation rate of oil from produced water. The software analyzes four inclinations relative to the horizontal axis (0°, 15°, 30° and 60°). The results from simulations identified oil accumulating zones and presence of recirculation zones. It also compared the pressure drop throughout the apparatus in all inclinations established, noting that a more favorable state occurs when the bed is at horizontal, presenting higher oil accumulation, fewer vorticity, and lower pressure drop. The less desirable scenario occurs with 60° inclination, displaying a lower separation efficiency, greater pressure drop, and higher turbulence effect.
{"title":"ANALYSIS OF THE INCLINATION INFLUENCE IN A COALESCER COLUMN FOR OIL/WATER TREATMENT VIA COMPUTATIONAL FLUID DYNAMICS","authors":"R. D. A. Albuquerque, M. C. Souza, J. G. O. Marinho, L. M. T. D. Oliveira","doi":"10.5419/bjpg2020-0003","DOIUrl":"https://doi.org/10.5419/bjpg2020-0003","url":null,"abstract":"Among the equipments used in the separation of water from oil, bed coalescers stands out. Even after decades of bed coalescer development, the role of some variables, such as apparatus inclination, in its behavior remains underexplored within the field. Thus, using the ANSYS CFX 13.0 software, a modeling was proposed to determine the influence of bed coalescer inclination in the separation rate of oil from produced water. The software analyzes four inclinations relative to the horizontal axis (0°, 15°, 30° and 60°). The results from simulations identified oil accumulating zones and presence of recirculation zones. It also compared the pressure drop throughout the apparatus in all inclinations established, noting that a more favorable state occurs when the bed is at horizontal, presenting higher oil accumulation, fewer vorticity, and lower pressure drop. The less desirable scenario occurs with 60° inclination, displaying a lower separation efficiency, greater pressure drop, and higher turbulence effect.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90849757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aim of this work is to produce a cobalt/ruthenium catalyst supported in SBA-15, for Fischer-Tropsch synthesis (FTS). The synthesis was carried out in a slurry reactor operating at 513 K, 20 atm, and CO:H2 molar ratio of 1:1. The addition of cobalt in SBA-15 decreased the specific superficial area of the molecular sieve. The ranges of temperature reduction typical of iron oxides phases were found using RTP results. Fischer-Tropsch synthesis activity and C5+ hydrocarbon selectivity increased with the addition of Ru. The increase in activity and selectivity were attributed to the increased number of active sites as a result of the higher reducibility.
{"title":"THE USE OF COBALT/RUTHENIUM CATALYST SUPPORTED IN SBA-15 IN THE PROMOTION OF FISCHER-TROPSCH SYNTHESIS","authors":"J. J. Rodrigues, F. Fernandes, M. Rodrigues","doi":"10.5419/bjpg2020-0002","DOIUrl":"https://doi.org/10.5419/bjpg2020-0002","url":null,"abstract":"The aim of this work is to produce a cobalt/ruthenium catalyst supported in SBA-15, for Fischer-Tropsch synthesis (FTS). The synthesis was carried out in a slurry reactor operating at 513 K, 20 atm, and CO:H2 molar ratio of 1:1. The addition of cobalt in SBA-15 decreased the specific superficial area of the molecular sieve. The ranges of temperature reduction typical of iron oxides phases were found using RTP results. Fischer-Tropsch synthesis activity and C5+ hydrocarbon selectivity increased with the addition of Ru. The increase in activity and selectivity were attributed to the increased number of active sites as a result of the higher reducibility.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73400189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Liquefied petroleum gas (LPG) is industrially stored in spherical or cylindrical vessels. These follow strict construction standards to prevent accidents that may be caused by fire or explosions in neighboring equipment. The heat transfer by thermal radiation is LPG’s main fire propagator. However, even with standards in place, design and operational failures can still occur. In this context, the installation of firefighting systems to avert major disasters becomes critical. The design of these systems must follow national and international standards and codes, which indicate prescriptive criteria for the selection of equipment to be cooled in case of fire in a LPG storage park. The present paper presents a case study for a LPG spherical vessel storage park. It uses the ALOHA simulator to calculate the action radius of thermal radiation and subsequent selection of spheres to be cooled. It also compares standards adopted in Brazil to international standards, demonstrating that Brazilian standards are more conservative and obsolete in regards to the advances in Fire Engineering. The work has the potential to be used as the basis for reviewing Brazilian’s standards.
{"title":"CALCULATION OF THERMAL RADIATION FOR THE DESIGN OF PROTECTION AND FIRE FIGHTING SYSTEMS FOR LPG STORAGE PARKS","authors":"R. M. S. T. Martins, R. F. Vianna","doi":"10.5419/bjpg2020-0004","DOIUrl":"https://doi.org/10.5419/bjpg2020-0004","url":null,"abstract":"Liquefied petroleum gas (LPG) is industrially stored in spherical or cylindrical vessels. These follow strict construction standards to prevent accidents that may be caused by fire or explosions in neighboring equipment. The heat transfer by thermal radiation is LPG’s main fire propagator. However, even with standards in place, design and operational failures can still occur. In this context, the installation of firefighting systems to avert major disasters becomes critical. The design of these systems must follow national and international standards and codes, which indicate prescriptive criteria for the selection of equipment to be cooled in case of fire in a LPG storage park. The present paper presents a case study for a LPG spherical vessel storage park. It uses the ALOHA simulator to calculate the action radius of thermal radiation and subsequent selection of spheres to be cooled. It also compares standards adopted in Brazil to international standards, demonstrating that Brazilian standards are more conservative and obsolete in regards to the advances in Fire Engineering. The work has the potential to be used as the basis for reviewing Brazilian’s standards.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"73 1","pages":"033-044"},"PeriodicalIF":0.0,"publicationDate":"2020-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86969232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
X-ray computed tomography, CT-scan, is a very important tool in special core analysis, because it allows the visualization of the interior of cores, providing information such as porosity, saturations, and changes on these parameters with time. CT-scan images are usually square, and contain information not only the core, but also parts of the core-holder, the water used to pressurize the system, and the rubbers that hold the cores in place. Software available to process these images are usually very expensive, or do not allow reasonable automation of the process of treating images. This paper proposes a simplified methodology to isolate the core in a CT image, allowing the processing of multiple images without the interference of the user. This methodology can be implemented easily in any computer language, it saves operation time, and reduces the risk of human error.
{"title":"AUTOMATED METHODOLOGY FOR DETECTING BORDER IN CT-SCAN IMAGES OF NON-CIRCULAR ROCK SAMPLES","authors":"L. F. Lamas, E. Ruidiaz, A. Vidal","doi":"10.5419/bjpg2019-0023","DOIUrl":"https://doi.org/10.5419/bjpg2019-0023","url":null,"abstract":"X-ray computed tomography, CT-scan, is a very important tool in special core analysis, because it allows the visualization of the interior of cores, providing information such as porosity, saturations, and changes on these parameters with time. CT-scan images are usually square, and contain information not only the core, but also parts of the core-holder, the water used to pressurize the system, and the rubbers that hold the cores in place. Software available to process these images are usually very expensive, or do not allow reasonable automation of the process of treating images. This paper proposes a simplified methodology to isolate the core in a CT image, allowing the processing of multiple images without the interference of the user. This methodology can be implemented easily in any computer language, it saves operation time, and reduces the risk of human error.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"89 1","pages":"275-281"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83457663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ricardo Vasconcellos Soares, H. Formentin, C. Maschio, D. Schiozer
Parameterization is a crucial step during uncertainty reduction of reservoir properties using dynamic data. It establishes the search space based on prior knowledge of the model and can have a significant influence on the final response. A less-appropriate parameterization might fail to have a reasonable representation of the reservoir and lead to models unable to predict the correct reservoir characteristics. Parameterization of petrophysical images (as facies, porosities, and permeabilities) plays an essential role during data assimilation processes due to the strong influence in fluid flow in the porous media. This work shows how important the parameterization of petrophysical images is and how a less-appropriate parameterization can affect history-matching and uncertainty reduction process. Using a benchmark case, we compare two parameterization techniques, one capable of treating all blocks in the model (distance-dependent covariance localization), which is considered more appropriate, and one that considers a group of blocks under the same update rule (zonation) (less-appropriate). Results show that parameterization of petrophysical images has a high impact on the final response, and a less-appropriate parameterization, as the zonation, can generate higher data mismatches and fail to represent the real reservoir response. The analysis carried in this work quantifies and qualifies the impact of the parameterization of the petrophysical images in the data assimilation for the uncertainty reduction process.
{"title":"EVALUATING THE IMPACT OF PETROPHYSICAL IMAGES PARAMETERIZATION IN DATA ASSIMILATION FOR UNCERTAINTY REDUCTION","authors":"Ricardo Vasconcellos Soares, H. Formentin, C. Maschio, D. Schiozer","doi":"10.5419/bjpg2019-0021","DOIUrl":"https://doi.org/10.5419/bjpg2019-0021","url":null,"abstract":"Parameterization is a crucial step during uncertainty reduction of reservoir properties using dynamic data. It establishes the search space based on prior knowledge of the model and can have a significant influence on the final response. A less-appropriate parameterization might fail to have a reasonable representation of the reservoir and lead to models unable to predict the correct reservoir characteristics. Parameterization of petrophysical images (as facies, porosities, and permeabilities) plays an essential role during data assimilation processes due to the strong influence in fluid flow in the porous media. This work shows how important the parameterization of petrophysical images is and how a less-appropriate parameterization can affect history-matching and uncertainty reduction process. Using a benchmark case, we compare two parameterization techniques, one capable of treating all blocks in the model (distance-dependent covariance localization), which is considered more appropriate, and one that considers a group of blocks under the same update rule (zonation) (less-appropriate). Results show that parameterization of petrophysical images has a high impact on the final response, and a less-appropriate parameterization, as the zonation, can generate higher data mismatches and fail to represent the real reservoir response. The analysis carried in this work quantifies and qualifies the impact of the parameterization of the petrophysical images in the data assimilation for the uncertainty reduction process.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"130 1","pages":"249-263"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74614568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thermal recovery methods are used typically to produce heavy oil and bitumen. During this process, the temperature is raised to reduce oil viscosity. Conventional thermal methods may not be effective on deep wells or thin zones. An alternative to the thermal process is electromagnetic heating, which is a process based on the transformation of electric energy into thermal energy due to the electromagnetic field and electrically sensitive particles interacting on the medium. In this paper, reservoir simulations with similar characteristics to those found in the sedimentary basins of the Brazilian Northeast were performed. The purpose of this work is to analyze the impact of the number of fractures, fracture configurations and number of producer wells during electromagnetic heating over the oil recovery factor (ORF) value. The results revealed an oil production increment with increasing number of producer wells and when fractures are located at the center of the oil production zone. However, oil production did not show an evident increase connected to the number fractures.
{"title":"IMPACT OF NUMBER OF FRACTURES ON OIL RECOVERY DURING ELECTROMAGNETIC HEATING","authors":"C. P. Ruiz, J. M. Tarifa","doi":"10.5419/bjpg2019-0020","DOIUrl":"https://doi.org/10.5419/bjpg2019-0020","url":null,"abstract":"Thermal recovery methods are used typically to produce heavy oil and bitumen. During this process, the temperature is raised to reduce oil viscosity. Conventional thermal methods may not be effective on deep wells or thin zones. An alternative to the thermal process is electromagnetic heating, which is a process based on the transformation of electric energy into thermal energy due to the electromagnetic field and electrically sensitive particles interacting on the medium. In this paper, reservoir simulations with similar characteristics to those found in the sedimentary basins of the Brazilian Northeast were performed. The purpose of this work is to analyze the impact of the number of fractures, fracture configurations and number of producer wells during electromagnetic heating over the oil recovery factor (ORF) value. The results revealed an oil production increment with increasing number of producer wells and when fractures are located at the center of the oil production zone. However, oil production did not show an evident increase connected to the number fractures.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"17 1","pages":"241-247"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83446425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. M. S. Alvim, K. Sepehrnoori, C. Scheid, L. Calçada, L. Meleiro
This paper presents the development of a computational code based on Discrete Element Method (DEM) to simulate the process of solid particles sedimentation and fluid filtration in drilling operations. For both phenomena, the adequate knowledge of the properties and characteristics of the underlying particulate systems represents an aspect of fundamental importance for the safe and efficient design of new drilling fluids and equipment. In this context, this paper presents a particle-scale simulation study, based on DEM, to describe the mechanics of cake formation and growth during the deposition of particulates. Three dimensional (3D) simulations of both processes were carried out to evaluate the proposed algorithm. The cake and the sediment properties, such as thickness, porosity and permeability were quantified and compared, qualitatively and quantitatively, to literature data. The cake properties obtained in this work showed good agreement with data found in similar conditions.
{"title":"PARTICLE-SCALE SIMULATION OF THE SEDIMENTATION AND FILTRATION OF DRILLING FLUIDS USING THE DISCRETE ELEMENT METHOD","authors":"J. M. S. Alvim, K. Sepehrnoori, C. Scheid, L. Calçada, L. Meleiro","doi":"10.5419/bjpg2019-0024","DOIUrl":"https://doi.org/10.5419/bjpg2019-0024","url":null,"abstract":"This paper presents the development of a computational code based on Discrete Element Method (DEM) to simulate the process of solid particles sedimentation and fluid filtration in drilling operations. For both phenomena, the adequate knowledge of the properties and characteristics of the underlying particulate systems represents an aspect of fundamental importance for the safe and efficient design of new drilling fluids and equipment. In this context, this paper presents a particle-scale simulation study, based on DEM, to describe the mechanics of cake formation and growth during the deposition of particulates. Three dimensional (3D) simulations of both processes were carried out to evaluate the proposed algorithm. The cake and the sediment properties, such as thickness, porosity and permeability were quantified and compared, qualitatively and quantitatively, to literature data. The cake properties obtained in this work showed good agreement with data found in similar conditions.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"12 1","pages":"283-300"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89680762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. M. França, A. P. Santos, C. Queiroz, K. C. A. Santos, A. Silva, S. Mattedi
This work evaluates the adsorption capacity of the wild cane fiber (Gynerium Sagittatum) in crude oil. Both untreated biomass and treated with ionic liquid [2HEA][Ac] and acetylated were studied for oil spill cleanup in aqueous environment. Crude oil adsorption tests were performed in a thermostatic bath, varying the time for the kinetic study and the amount of oil for isotherm model. Kinetic study of oil adsorption allowed us to identify that the untreated fiber reached saturation in 90 minutes, while the fiber treated with acetylated and ionic liquid reached saturation in 30 minutes. In equilibrium, the total amount of oil adsorbed by the untreated fiber was 3.8g, whereas in acetylated and ionic liquid treated fiber, the obtained maximum adsorption capacity was 4.4 and 3.7 g, respectively. The remediation process using wild cane fiber followed a second order kinetic rate and Sips and Toth isotherm models provided the best fit to experimental data.
{"title":"ADSORPTION OF CRUDE OIL IN AQUEOUS ENVIRONMENT USING WILD CANE FIBER: EQUILIBRIUM AND KINETIC STUDIES","authors":"P. M. França, A. P. Santos, C. Queiroz, K. C. A. Santos, A. Silva, S. Mattedi","doi":"10.5419/bjpg2019-0028","DOIUrl":"https://doi.org/10.5419/bjpg2019-0028","url":null,"abstract":"This work evaluates the adsorption capacity of the wild cane fiber (Gynerium Sagittatum) in crude oil. Both untreated biomass and treated with ionic liquid [2HEA][Ac] and acetylated were studied for oil spill cleanup in aqueous environment. Crude oil adsorption tests were performed in a thermostatic bath, varying the time for the kinetic study and the amount of oil for isotherm model. Kinetic study of oil adsorption allowed us to identify that the untreated fiber reached saturation in 90 minutes, while the fiber treated with acetylated and ionic liquid reached saturation in 30 minutes. In equilibrium, the total amount of oil adsorbed by the untreated fiber was 3.8g, whereas in acetylated and ionic liquid treated fiber, the obtained maximum adsorption capacity was 4.4 and 3.7 g, respectively. The remediation process using wild cane fiber followed a second order kinetic rate and Sips and Toth isotherm models provided the best fit to experimental data.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"1 1","pages":"333-354"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77225183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thiago Barbosa da Silva, E. T. L. Junior, L. P. Gouveia
In oil and gas wells scenario, casing design is a crucial stage of the project, representing the major structural elements responsible for maintaining well integrity through its lifetime and allowing adequate production activities. The occurrence of failures in casing systems can lead to irreversible safety problems in well operation. It is estimated that between 85% to 95% of the failures in well tubulars are related to joints (Payne et al., 2006). This work aims to analyze mechanical models of API casing connections in a probabilistic framework. The formulation for evaluating the strength of tubulars, under various load conditions, is presented by the code API TR 5C3 (2008), widely used by oil and gas companies worldwide. The reliability analysis is performed by the Monte Carlo simulation and First Order Reliability Method (FORM), considering failure modes by fracture in round and buttress connections, beyond failures by pull-out in round connections.
在油气井中，套管设计是项目的关键阶段，它代表了主要的结构元素，负责在整个生命周期内保持油井的完整性，并允许充分的生产活动。套管系统故障的发生会导致井作业中出现不可逆转的安全问题。据估计，85%至95%的井管柱失效与节理有关(Payne et al.， 2006)。这项工作的目的是在概率框架下分析API套管连接的力学模型。在各种载荷条件下评估管柱强度的公式由API TR 5C3(2008)规范提出，该规范被世界各地的石油和天然气公司广泛使用。可靠性分析采用蒙特卡罗模拟和一阶可靠性方法(FORM)进行，考虑了圆形连接和支撑连接的断裂失效模式，以及圆形连接的拔出失效模式。
{"title":"STRUCTURAL RELIABILITY APPLIED TO ANALYTICAL MODELING OF THE TENSILE STRENGTH OF STANDARD API CASING CONNECTIONS","authors":"Thiago Barbosa da Silva, E. T. L. Junior, L. P. Gouveia","doi":"10.5419/bjpg2019-0025","DOIUrl":"https://doi.org/10.5419/bjpg2019-0025","url":null,"abstract":"In oil and gas wells scenario, casing design is a crucial stage of the project, representing the major structural elements responsible for maintaining well integrity through its lifetime and allowing adequate production activities. The occurrence of failures in casing systems can lead to irreversible safety problems in well operation. It is estimated that between 85% to 95% of the failures in well tubulars are related to joints (Payne et al., 2006). This work aims to analyze mechanical models of API casing connections in a probabilistic framework. The formulation for evaluating the strength of tubulars, under various load conditions, is presented by the code API TR 5C3 (2008), widely used by oil and gas companies worldwide. The reliability analysis is performed by the Monte Carlo simulation and First Order Reliability Method (FORM), considering failure modes by fracture in round and buttress connections, beyond failures by pull-out in round connections.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"8 1","pages":"301-307"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76509424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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