Management of injected nitrogen into a gas condensate reservoir

This study investigates the means of deferring the breakthrough of injected N2 and alleviating the impact of such on production rates and specifications as well as minimizing the required changes to the gas processing facilities. This aimed at assisting the ongoing efforts to transfer the Cantarell...

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Autores:
Belhaj, Hadi
Tipo de recurso:
Article of journal
Fecha de publicación:
2016
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/67626
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/67626
http://bdigital.unal.edu.co/68655/
Palabra clave:
62 Ingeniería y operaciones afines / Engineering
Nitrogen injection
condensate reservoirs
alternatives to lean dry gas
gas reservoirs
nitrogen economics.
Inyección de nitrógeno
yacimientos de gas condensado
alternativas al gas seco pobre
yacimientos de gas
economía de nitrógeno.
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
id UNACIONAL2_d8a506abe6a4de6597b099af68db4662
oai_identifier_str oai:repositorio.unal.edu.co:unal/67626
network_acronym_str UNACIONAL2
network_name_str Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv Management of injected nitrogen into a gas condensate reservoir
title Management of injected nitrogen into a gas condensate reservoir
spellingShingle Management of injected nitrogen into a gas condensate reservoir
62 Ingeniería y operaciones afines / Engineering
Nitrogen injection
condensate reservoirs
alternatives to lean dry gas
gas reservoirs
nitrogen economics.
Inyección de nitrógeno
yacimientos de gas condensado
alternativas al gas seco pobre
yacimientos de gas
economía de nitrógeno.
title_short Management of injected nitrogen into a gas condensate reservoir
title_full Management of injected nitrogen into a gas condensate reservoir
title_fullStr Management of injected nitrogen into a gas condensate reservoir
title_full_unstemmed Management of injected nitrogen into a gas condensate reservoir
title_sort Management of injected nitrogen into a gas condensate reservoir
dc.creator.fl_str_mv Belhaj, Hadi
dc.contributor.author.spa.fl_str_mv Belhaj, Hadi
dc.subject.ddc.spa.fl_str_mv 62 Ingeniería y operaciones afines / Engineering
topic 62 Ingeniería y operaciones afines / Engineering
Nitrogen injection
condensate reservoirs
alternatives to lean dry gas
gas reservoirs
nitrogen economics.
Inyección de nitrógeno
yacimientos de gas condensado
alternativas al gas seco pobre
yacimientos de gas
economía de nitrógeno.
dc.subject.proposal.spa.fl_str_mv Nitrogen injection
condensate reservoirs
alternatives to lean dry gas
gas reservoirs
nitrogen economics.
Inyección de nitrógeno
yacimientos de gas condensado
alternativas al gas seco pobre
yacimientos de gas
economía de nitrógeno.
description This study investigates the means of deferring the breakthrough of injected N2 and alleviating the impact of such on production rates and specifications as well as minimizing the required changes to the gas processing facilities. This aimed at assisting the ongoing efforts to transfer the Cantarell experience to Abu Dhabi, where large amounts of N2 gas will be generated and injected into a large gas condensate reservoir to partially substitute the recycling of lean gas. This will bring forward the opportunity to exploit lean gas by securing base load supplies before the start of reservoir blowdown, compared to the peak shaving approach currently practiced. Managing N2 breakthrough starts by better understanding the pattern at which N2 injection spreads into the gas accumulation. Based on the findings of initial subsurface and plant simulations carried out in 2008, N2 breakthrough in Abu Dhabi might be possibly deferred by segmenting the reservoir into a rich N2 region and lean N2 region. The approach assumes no thief zones will be faced and no channeling of N2 injected between the two regions is taking place. N2 is injected in the north region of the reservoir. The production of that region will be segregated and fed to a gas processing plant of lower NGL (natural gas liquid) recovery, which essentially takes longer time to start suffering the deterioration of residue gas (gas mixture resulted after separating NGL) quality. The residue gas use can be limited to re-injection where the effect of below specification LHV (Low Heat Value) would not be an issue. The rest of the reservoir feeds another gas processing plant of higher NGL recovery level from which an amount of residue gas equivalent to that of the injected N2 will be rerouted to the sales network. This scenario will significantly delay as well as downsize the requirement of a N2 rejection plant. There is technical and certainly economical advantage of deferring the installation of costly N2 rejection units. Such a requirement can be entirely eliminated if the sales gas specification can be relaxed considering blending with other gas streams of higher LHV, and in collaboration with gas customers, i.e. assessing their capability to tolerate feedstock of lower specifications. It must be noted that such school of thinking may not necessarily be eventually embraced. The chosen scenario will also depend on the final configuration, i.e., wells grouping and gas gathering, of the ongoing project.
publishDate 2016
dc.date.issued.spa.fl_str_mv 2016-01-01
dc.date.accessioned.spa.fl_str_mv 2019-07-03T04:42:35Z
dc.date.available.spa.fl_str_mv 2019-07-03T04:42:35Z
dc.type.spa.fl_str_mv Artículo de revista
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dc.type.driver.spa.fl_str_mv info:eu-repo/semantics/article
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dc.type.content.spa.fl_str_mv Text
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dc.identifier.issn.spa.fl_str_mv ISSN: 2248-8723
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identifier_str_mv ISSN: 2248-8723
url https://repositorio.unal.edu.co/handle/unal/67626
http://bdigital.unal.edu.co/68655/
dc.language.iso.spa.fl_str_mv spa
language spa
dc.relation.spa.fl_str_mv https://revistas.unal.edu.co/index.php/ingeinv/article/view/50319
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e Investigación
Ingeniería e Investigación
dc.relation.references.spa.fl_str_mv Belhaj, Hadi (2016) Management of injected nitrogen into a gas condensate reservoir. Ingeniería e Investigación, 36 (1). pp. 52-61. ISSN 2248-8723
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
dc.rights.uri.spa.fl_str_mv http://creativecommons.org/licenses/by-nc/4.0/
dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
http://creativecommons.org/licenses/by-nc/4.0/
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.mimetype.spa.fl_str_mv application/pdf
dc.publisher.spa.fl_str_mv Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ingeniería
institution Universidad Nacional de Colombia
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repository.name.fl_str_mv Repositorio Institucional Universidad Nacional de Colombia
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spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Belhaj, Hadib63d43d0-e9f9-4fed-8b49-8d786b3fa1723002019-07-03T04:42:35Z2019-07-03T04:42:35Z2016-01-01ISSN: 2248-8723https://repositorio.unal.edu.co/handle/unal/67626http://bdigital.unal.edu.co/68655/This study investigates the means of deferring the breakthrough of injected N2 and alleviating the impact of such on production rates and specifications as well as minimizing the required changes to the gas processing facilities. This aimed at assisting the ongoing efforts to transfer the Cantarell experience to Abu Dhabi, where large amounts of N2 gas will be generated and injected into a large gas condensate reservoir to partially substitute the recycling of lean gas. This will bring forward the opportunity to exploit lean gas by securing base load supplies before the start of reservoir blowdown, compared to the peak shaving approach currently practiced. Managing N2 breakthrough starts by better understanding the pattern at which N2 injection spreads into the gas accumulation. Based on the findings of initial subsurface and plant simulations carried out in 2008, N2 breakthrough in Abu Dhabi might be possibly deferred by segmenting the reservoir into a rich N2 region and lean N2 region. The approach assumes no thief zones will be faced and no channeling of N2 injected between the two regions is taking place. N2 is injected in the north region of the reservoir. The production of that region will be segregated and fed to a gas processing plant of lower NGL (natural gas liquid) recovery, which essentially takes longer time to start suffering the deterioration of residue gas (gas mixture resulted after separating NGL) quality. The residue gas use can be limited to re-injection where the effect of below specification LHV (Low Heat Value) would not be an issue. The rest of the reservoir feeds another gas processing plant of higher NGL recovery level from which an amount of residue gas equivalent to that of the injected N2 will be rerouted to the sales network. This scenario will significantly delay as well as downsize the requirement of a N2 rejection plant. There is technical and certainly economical advantage of deferring the installation of costly N2 rejection units. Such a requirement can be entirely eliminated if the sales gas specification can be relaxed considering blending with other gas streams of higher LHV, and in collaboration with gas customers, i.e. assessing their capability to tolerate feedstock of lower specifications. It must be noted that such school of thinking may not necessarily be eventually embraced. The chosen scenario will also depend on the final configuration, i.e., wells grouping and gas gathering, of the ongoing project.Este estudio investiga los medios de diferir el paso de nitrógeno N2 inyectado y moderar su impacto en las tasas de producción y especificaciones, así como minimizar los cambios requeridos en las instalaciones de procesamiento de gases. El objetivo es contribuir a los esfuerzos en curso en la transferencia de experiencia de Cantarell a los campos de Abu Dabi, donde grandes cantidades de nitrógeno serán generadas e Inyectadas dentro de yacimientos de gas condensado para sustituir el reciclado de gas pobre. Esto permitirá extraer gas pobre asegurando su suministro base antes de comenzar el desfogue del yacimiento, en comparación con la técnica de “peak shaving” actualmente usada. La gestión del paso de nitrógeno N2 comienza por entender el patrón de propagación del N2 inyectado dentro del gas acumulado. En base a los resultados iniciales de las simulaciones de plantas y subsuelo llevadas a cabo en el 2008, el paso de nitrógeno en Abu Dabi puede ser posiblemente diferido dividiendo el yacimiento en zonas de gas N2 rico y gas N2 pobre. Este enfoque asume que no hay zonas de absorción ni conexión entre las dos zonas. El nitrógeno es inyectado en la parte norte del yacimiento, que es segmentada y alimentada por una planta de procesamiento y recuperación de gas natural líquido (GNL). Esto esencialmente hace que tarde más tiempo en empezar el deterioro del residuo de gas (mezcla del gas resultante después de la separación del GNL). El uso del residuo de gas puede ser limitado a la re-inyección donde el efecto por debajo del poder calorífico inferior (PCI) no es un impedimento. El resto del yacimiento alimenta otra planta de procesamiento de gas de alta recuperación de GNL, de la cual una cantidad de residuo de gas equivalente al nitrógeno inyectado será redirigido a la red de ventas. Este escenario significara un retardo así como una reducción del requerimiento de una planta de re-inyección de nitrógeno. Ciertamente hay ventajas técnicas y económicas en diferir la instalación de unidades de re-inyección de nitrógeno. Tal requerimiento puede ser enteramente eliminado si las especificaciones de venta de gas se rebajan considerando el uso de mezclas con otros gases de alto PCI y gases clientes, es decir, evaluando su capacidad de tolerar materia prima de bajas especificaciones. Es de notar que tal escuela de pensamiento podría ser no necesariamente aceptada. El escenario elegido dependerá de la configuración final (grupo de pozos y acopio de gases) del proyecto en cuestión.application/pdfspaUniversidad Nacional de Colombia - Sede Bogotá - Facultad de Ingenieríahttps://revistas.unal.edu.co/index.php/ingeinv/article/view/50319Universidad Nacional de Colombia Revistas electrónicas UN Ingeniería e InvestigaciónIngeniería e InvestigaciónBelhaj, Hadi (2016) Management of injected nitrogen into a gas condensate reservoir. Ingeniería e Investigación, 36 (1). pp. 52-61. ISSN 2248-872362 Ingeniería y operaciones afines / EngineeringNitrogen injectioncondensate reservoirsalternatives to lean dry gasgas reservoirsnitrogen economics.Inyección de nitrógenoyacimientos de gas condensadoalternativas al gas seco pobreyacimientos de gaseconomía de nitrógeno.Management of injected nitrogen into a gas condensate reservoirArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL50319-289775-1-PB.pdfapplication/pdf881989https://repositorio.unal.edu.co/bitstream/unal/67626/1/50319-289775-1-PB.pdff2600a3868f5dbde52f8e882db7ea8b3MD51THUMBNAIL50319-289775-1-PB.pdf.jpg50319-289775-1-PB.pdf.jpgGenerated Thumbnailimage/jpeg8817https://repositorio.unal.edu.co/bitstream/unal/67626/2/50319-289775-1-PB.pdf.jpg781a728888bbc018256c9747ec462fe0MD52unal/67626oai:repositorio.unal.edu.co:unal/676262024-05-22 23:34:02.662Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co