Documents disponibles écrits par cet auteur

Decision matrix for liquid loading in gas wells for cost/benefit analyses of lifting options / Han-Young Park in Journal of natural gas science and engineering, Vol. 1 N° 3 (Septembre 2009) 

Public ISBD [article]  in Journal of natural gas science and engineering > Vol. 1 N° 3 (Septembre 2009) . - pp. 72-83 Titre : Decision matrix for liquid loading in gas wells for cost/benefit analyses of lifting options Type de document : texte imprimé Auteurs : Han-Young Park, Auteur ; Gioia Falcone, Auteur ; Catalin Teodoriu, Auteur Article en page(s) : pp. 72-83 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Liquid  loading  Artificial  lift Index. décimale : 665.7 Résumé : Liquid loading in gas wells is a multiphase flow phenomenon where the liquid content of the well creates back pressure that restricts, and in some cases even stops, the flow of gas from the reservoir. It is estimated that 90% of the producing gas wells in the U.S. are operating in liquid loading regime. Field-proven solutions already exist to reduce the loss of gas production when liquid loading begins to occur. However, whether or not the chosen remedy is technically feasible and cost effective will depend on the field's location, export route capacity and the operator's experience. Although there are literature reviews available that describe the possible solutions to liquid loading problems in gas wells, no tool currently exists which is capable of helping an operator select the best remedial option for a specific field case. The selection of the best remedial technique and the timeframe within which the remedial action is undertaken are critical to a project's profitability. This paper describes a newly developed decision matrix to screen the possible remedial options available to the operator. The matrix not only provides a critical evaluation of technical solutions to the problem of liquid loading in gas wells vis-à-vis the existing technical and economic constraints, but also serves as a quick screening tool for the selection of production optimization strategies. In its current state of development, the tool consists of an assessment algorithm used in conjunction with a decision tree. Being a data mining technique, the decision tree allows rapid subdivision of large initial data sets into successively smaller sets by a series of decision rules, which are based on information available in the public domain. The effectiveness of the matrix is now ready to be tested against real field data sets. DEWEY : 665.7 ISSN : 1875-5100 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%2356453%2 [...] [article] Decision matrix for liquid loading in gas wells for cost/benefit analyses of lifting options [texte imprimé] / Han-Young Park, Auteur ; Gioia Falcone, Auteur ; Catalin Teodoriu, Auteur . - pp. 72-83. Génie Chimique Langues : Anglais (eng) in Journal of natural gas science and engineering > Vol. 1 N° 3 (Septembre 2009) . - pp. 72-83 Mots-clés : Liquid  loading  Artificial  lift Index. décimale : 665.7 Résumé : Liquid loading in gas wells is a multiphase flow phenomenon where the liquid content of the well creates back pressure that restricts, and in some cases even stops, the flow of gas from the reservoir. It is estimated that 90% of the producing gas wells in the U.S. are operating in liquid loading regime. Field-proven solutions already exist to reduce the loss of gas production when liquid loading begins to occur. However, whether or not the chosen remedy is technically feasible and cost effective will depend on the field's location, export route capacity and the operator's experience. Although there are literature reviews available that describe the possible solutions to liquid loading problems in gas wells, no tool currently exists which is capable of helping an operator select the best remedial option for a specific field case. The selection of the best remedial technique and the timeframe within which the remedial action is undertaken are critical to a project's profitability. This paper describes a newly developed decision matrix to screen the possible remedial options available to the operator. The matrix not only provides a critical evaluation of technical solutions to the problem of liquid loading in gas wells vis-à-vis the existing technical and economic constraints, but also serves as a quick screening tool for the selection of production optimization strategies. In its current state of development, the tool consists of an assessment algorithm used in conjunction with a decision tree. Being a data mining technique, the decision tree allows rapid subdivision of large initial data sets into successively smaller sets by a series of decision rules, which are based on information available in the public domain. The effectiveness of the matrix is now ready to be tested against real field data sets. DEWEY : 665.7 ISSN : 1875-5100 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%2356453%2 [...]

Modeling fully transient two-phase flow in the near-wellbore region during liquid loading in gas wells / He Zhang in Journal of natural gas science and engineering, Vol. 2 N° 2-3 (Juillet 2010) 

Public ISBD [article]  in Journal of natural gas science and engineering > Vol. 2 N° 2-3 (Juillet 2010) . - pp. 122–131 Titre : Modeling fully transient two-phase flow in the near-wellbore region during liquid loading in gas wells Type de document : texte imprimé Auteurs : He Zhang, Auteur ; Gioia Falcone, Auteur ; Catalin Teodoriu, Auteur Année de publication : 2012 Article en page(s) : pp. 122–131 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Liquid  loading  Wellbore  phase  redistribution  Transient  backflow  Near-wellbore  region Résumé : In oil and gas field operations, the dynamic interactions between reservoir and wellbore cannot be ignored, especially during transient flow in the near-wellbore region. A particular instance of transient flow in the near-wellbore region is the intermittent response of a reservoir that is typical of liquid loading in gas wells. Despite the high level of attention that the industry has devoted to the alleviation of liquid loading, the fundamental understanding of the associated phenomena is still surprisingly weak. This applies not only to the flows in the wells, but also to the ways in which these flows interact with those in the reservoir. This paper presents the results of a numerical modeling effort using bespoke code written at Texas A&M University, to identify the pressure profile in the near-wellbore region during fully transient flow conditions for a synthetic, low permeability gas reservoir. The results show a “U-shaped” pressure profile along the reservoir radius in the near-wellbore region. The existence of such pressure profile might explain the re-injection of the heavier liquid phase into the reservoir during liquid unloading in gas wells. A comparison of the results with those obtained using a commercial reservoir simulator show the limitations of the latter, which is unable to mimic re-injection of the liquid into the near-wellbore region. ISSN : 1875-5100 En ligne : http://www.sciencedirect.com/science/article/pii/S1875510010000314 [article] Modeling fully transient two-phase flow in the near-wellbore region during liquid loading in gas wells [texte imprimé] / He Zhang, Auteur ; Gioia Falcone, Auteur ; Catalin Teodoriu, Auteur . - 2012 . - pp. 122–131. Génie Chimique Langues : Anglais (eng) in Journal of natural gas science and engineering > Vol. 2 N° 2-3 (Juillet 2010) . - pp. 122–131 Mots-clés : Liquid  loading  Wellbore  phase  redistribution  Transient  backflow  Near-wellbore  region Résumé : In oil and gas field operations, the dynamic interactions between reservoir and wellbore cannot be ignored, especially during transient flow in the near-wellbore region. A particular instance of transient flow in the near-wellbore region is the intermittent response of a reservoir that is typical of liquid loading in gas wells. Despite the high level of attention that the industry has devoted to the alleviation of liquid loading, the fundamental understanding of the associated phenomena is still surprisingly weak. This applies not only to the flows in the wells, but also to the ways in which these flows interact with those in the reservoir. This paper presents the results of a numerical modeling effort using bespoke code written at Texas A&M University, to identify the pressure profile in the near-wellbore region during fully transient flow conditions for a synthetic, low permeability gas reservoir. The results show a “U-shaped” pressure profile along the reservoir radius in the near-wellbore region. The existence of such pressure profile might explain the re-injection of the heavier liquid phase into the reservoir during liquid unloading in gas wells. A comparison of the results with those obtained using a commercial reservoir simulator show the limitations of the latter, which is unable to mimic re-injection of the liquid into the near-wellbore region. ISSN : 1875-5100 En ligne : http://www.sciencedirect.com/science/article/pii/S1875510010000314

Rolling ball viscometer calibration with gas over whole interest range of pressure and temperature improves accuracy of gas viscosity measurement / Ehsan Davani in Industrial & engineering chemistry research, Vol. 51 N° 46 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15276–15281 Titre : Rolling ball viscometer calibration with gas over whole interest range of pressure and temperature improves accuracy of gas viscosity measurement Type de document : texte imprimé Auteurs : Ehsan Davani, Auteur ; Gioia Falcone, Auteur ; Catalin Teodoriu, Auteur Année de publication : 2013 Article en page(s) : pp. 15276–15281 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Viscosity  Calibration Résumé : A practical method for measuring gas viscosity uses gas to calibrate the rolling ball viscometer over the whole interest range of pressure and temperature. It reduces the turbulent effect of gas flow around the ball. The viscometer calibration at only atmospheric pressure yields poor results, because it cannot accommodate the turbulent effect at higher pressures. We used nitrogen to calibrate the viscometer for the pressure up to 8,000 psia and temperature up to 260 °F. Optimal tube inclination angle and also ball/tube diameter ratio ensure the laminar flow around the ball and improve the accuracy of the results. Viscosity measurements of ultrapure CO2 confirmed this technique. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26679648 [article] Rolling ball viscometer calibration with gas over whole interest range of pressure and temperature improves accuracy of gas viscosity measurement [texte imprimé] / Ehsan Davani, Auteur ; Gioia Falcone, Auteur ; Catalin Teodoriu, Auteur . - 2013 . - pp. 15276–15281. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15276–15281 Mots-clés : Viscosity  Calibration Résumé : A practical method for measuring gas viscosity uses gas to calibrate the rolling ball viscometer over the whole interest range of pressure and temperature. It reduces the turbulent effect of gas flow around the ball. The viscometer calibration at only atmospheric pressure yields poor results, because it cannot accommodate the turbulent effect at higher pressures. We used nitrogen to calibrate the viscometer for the pressure up to 8,000 psia and temperature up to 260 °F. Optimal tube inclination angle and also ball/tube diameter ratio ensure the laminar flow around the ball and improve the accuracy of the results. Viscosity measurements of ultrapure CO2 confirmed this technique. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26679648