{{Short description|Iranian oil company}} {{redirect|Osco|the U. S. pharmacy chain|Osco Drug and Sav-on Drugs}} {{Infobox company | name = National Iranian South Oil Company | logo = National Iranian Oil Company (emblem).svg | logo_size = 120px | type = [[Government-owned corporation|State-owned enterprise]] | traded_as = | predecessor = | industry = [[List of petroleum companies|Oil and gas]] | founded = 1971 | hq_location = [[Ahvaz]], [[Iran]] | key_people = Alireza Daneshi <small>([[CEO]])</small><ref>{{cite news|title=NISOC CEO Appointed|url=https://en.shana.ir/news/322806/NISOC-CEO-Appointed|publisher=SHANA, 19 October 2021}}</ref> | products = [[Oil]], [[natural gas]] and [[liquefied gas]]es | operating_income = | net_income = | equity = | num_employees = 19,000 <small>(2012)</small>{{citation needed|date=August 2014}} | owner = [[National Iranian Oil Company]] | website = {{official URL}} }}

The '''National Iranian South Oilfields Company''' ('''NISOC''') ({{langx|fa|شرکت ملی مناطق نفت‌خیز جنوب ایران}}, ''Shirkat-e Mily-e Minatâq-e Nuftxiz-e Jinvâb-e Iran'') is a [[government-owned corporation]] under the direction of the [[Ministry of Petroleum of Iran]], and operates as a subsidiary of [[National Iranian Oil Company]].

NISOC was incorporated in 1971 in [[Masjed Soleyman]], [[Khouzestan]] as '''Oil Service Company of Iran''' ('''OSCO''').<ref>{{cite news|title=Hague yearbook of international law, Volume 18 |year = 1990|url=https://books.google.com/books?id=l3rrtsYq-sgC&q=Oil+Service+Company+of+Iran+%28OSCO%29&pg=PA393|publisher=Martinus Nijhoff Publishers|isbn = 9024737494}}</ref><ref>{{cite news|title=Reading & Bates Corp. v. National Iranian Oil Co., 478 F. Supp. 724 (S.D.N.Y. 1979)|url=http://law.justia.com/cases/federal/district-courts/FSupp/478/724/1899248/|publisher=Justia}}</ref> Currently NISOC is [[Iran|Iran's]] biggest oil producer, and produces 3 million barrels of oil per day. The company is active in a land area more than 400,000&nbsp;km<sup>2</sup> with headquarters in [[Ahvaz]]. NISOC is producing about 83% of all crude oil and 17% of natural gas produced in Iran<ref>{{cite news|title=NISOC boosting oil production|url=http://www3.irna.ir/en/News/81585894/|publisher=[[IRNA]]|access-date=2015-11-09|archive-url=https://web.archive.org/web/20151121152946/http://www3.irna.ir/en/News/81585894/|archive-date=2015-11-21|url-status=dead}}</ref> and ranks as the Iran's biggest oil company.<ref>{{Cite web |url=http://www.nisoc.ir/HomePage.aspx?TabID=3548&Site=DouranPortal&Lang=en-About |title=US, NISOC.com |access-date=2017-11-09 |archive-date=2020-03-14 |archive-url=https://web.archive.org/web/20200314102540/https://www.nisoc.ir/HomePage.aspx?TabID=3548&Site=nisoc&Lang=fa-IR |url-status=dead }}</ref>

National Iranian South Oilfields Company, through its subsidiaries, produces crude oil, gas, and [[liquefied gas]]es. The company's reserves portfolio include [[Ahvaz Field]] (the world's 3rd largest oil field) and in charge of onshore giant oilfields in Iran (like [[Gachsaran oil field|Gachsaran]], [[Maroun Field|Maroun]], [[Bibi Hakimeh oil field|Bibi Hakimeh]], [[Rag Sefid oil field|RagSefid]] and [[Aghajari oil field|Aghajari]]) and focuses on onshore [[Upstream (petroleum industry)|upstream]] activity in the province of [[Khuzestan Province|Khuzestan]], [[Kohgiluyeh and Boyer-Ahmad Province|Kohgiluyeh and Boyer-Ahmad]], [[Bushehr Province|Bushehr]] and [[Ilam Province|Ilam]].<ref>{{cite news|title=5 Desalination Projects to Come Online Soon: NISOC|url=http://kayhan.ir/en/news/20202/5-desalination-projects-to-come-online-soon-nisoc|publisher=[[Kayhan]]|date=4 November 2015}}</ref> As Khuzestan is the main oil- and gas-producing province, this entity is among the most significant in the NIOC subsidiaries.<ref name="eia.gov">[http://www.eia.gov/countries/cab.cfm?fips=IR eia.gov]</ref>

== Aghajari oil field == The '''Aghajari oil field''' is an [[Iran|iranian]] [[oil field]] located in [[Khuzestan Province]]. It was discovered by [[Anglo-Persian Oil Company]] in 1938 and developed by [[National Iranian Oil Company]].<ref>{{cite web |year=2017 |title=NISOC to Develop 27 Oil Reservoirs |url=https://financialtribune.com/articles/energy/78215/nisoc-to-develop-27-oil-reservoirs |accessdate= |publisher=[[Financial Tribune]]}}</ref> It began production in 1940 and produces [[oil]]. The total [[proven reserves]] of the Aghajari oil field are around 30 billion barrels (3758 million tonnes), and production is centered on {{convert|170000|oilbbl/d|m3/d}}.<ref>{{cite web |year=2004 |title=Iran expects Aghajari oil field to yield 300,000 bpd oil for 20 years |url=http://www.gasandoil.com/news/2004/04/ntm41488 |url-status=dead |archive-url=https://web.archive.org/web/20160603145749/http://www.gasandoil.com/news/2004/04/ntm41488 |archive-date=2016-06-03 |accessdate=2013-06-01 |publisher=GasandOil.com}}</ref> The field is owned by state-owned [[National Iranian Oil Company]] (NIOC) and operated by NISOC.<ref>{{cite web |year=2010 |title=Giant oil and gas fields |url=http://www.rand.org/content/dam/rand/pubs/reports/2006/R2284.pdf |accessdate=2013-06-01 |publisher=Rand.org}}</ref>

===Aghajari Gas Injection Project=== The '''Aghajari Gas Injection Project''' is the world’s biggest [[enhanced oil recovery]] project inaugurated in Iran in late 2008, aiming at boosting production from the aging Aghajari oil field. The reservoir dimension of [[Aghajari oil field|Aghajari fields]] is 56×6&nbsp;km with the original oil-in-place of {{convert|28|Goilbbl|m3}} and 10.2 billion barrels of recoverable oil (based on latest studies). The total quantities extracted since the start of operations at Aghajari till this date have been 8.8 bn barrels.<ref name="PEDEC">[http://pedec.ir/plandetail-en-36.html PEDEC Website] {{webarchive |url=https://web.archive.org/web/20080521181846/http://pedec.ir/plandetail-en-36.html |date=May 21, 2008 }}</ref>

However, production has been on the decline because of loss of pressure and oil extraction, so that current output is {{convert|180000|oilbbl|m3}} a day.

With injection of {{convert|3.6|Gcuft|m3}} of gas per day ({{convert|20|e12cuft|km3}} of gas in total) from the south pars field and subsequent buildup of pressure, an additional quantity of {{convert|1.2|Goilbbl|m3}} of oil will be produced. It is also estimated that daily crude oil output of the field will increase to {{convert|300000|oilbbl/d|m3/d}}.<ref name="PEDEC"/>

Project consists of three main parts;

*Upstream:

Development of South Pars phases 6, 7 and 8.

*Midstream:

The 504-km long, 56-inch pipeline for transfer of sour gas from the South Pars gas field phases 6,7 and 8 to be injected to Aghajari oilfield.

*Downstream:

Installation of a gas-compression station, drilling of 19 new wells, work over of 3 existing wells for gas injection, installing pipelines on 2 existing gas injecting wells.<ref name="PEDEC"/>

==See also== {{Portal|Iran|Energy|Companies}} *[[Petroleum industry in Iran]] *[[National Iranian Oil Company]] *[[World Largest Gas Fields]] *[[National Iranian Gas Company]] *[[NIOC Recent Discoveries]] *[[Iran Natural Gas Reserves]] *[[South Pars]] *[[North Pars]] *[[Kish Gas Field]] *[[Golshan Gas Field]] *[[Ferdowsi Gas Field]] *[[Persian LNG]] *[[Iran Gas Trunkline (IGAT)]]

==References== {{reflist}}

==External links== * [http://www.nisoc.ir/ NISOC - Official Site] {{Webarchive|url=https://web.archive.org/web/20070210005419/http://www.nisoc.ir/ |date=2007-02-10 }}

{{Energy in Iran}} {{Petroleum Industry}}

{{authority control}}

[[Category:National Iranian Oil Company]] [[Category:Government-owned companies of Iran]] [[Category:Oilfield services companies]] [[Category:Energy companies established in 1971]] [[Category:Non-renewable resource companies established in 1971]] [[Category:National oil and gas companies|Iran]] [[Category:Oil and gas companies of Iran]] [[Category:Iranian companies established in 1971]]