TGS - Natural gas liquids (NGL) project, Tratayén - Bahía Blanca
The largest natural gas liquids project in Argentina's history: a fractionation plant for 2.7 million tonnes a year of propane, butane and natural gasoline, a 20-inch liquids pipeline from Tratayén to Bahía Blanca and an export terminal at Puerto Galván. Final investment decision taken in June 2026, 45 months of construction and start-up expected in March 2030.
How to supply it
what we have for a supplier, and how to request it
What we have on this project for a supplier
Who decides the purchase, who you invoice and where a new supplier registers.
Which lines each phase buys and when the window opens for each one.
Which they are, why it will need them and who could provide them.
All of this is surveyed and verified against its source. Crossed with what you sell —which of them your products suit, how to reach it and when— it is in your company report. Request the report
We cross what you manufacture or do against the 3 phases of this project and tell you which ones you fit into and when each one buys. Two pages, with the evidence behind them.
Where my company can get inThe project
what it is, the route, the owners, the works and the contractors
Who owns it
Transportadora de Gas del Sur (TGS) verif Mar 11, 2026 ↗
The works, milestone by milestone
The company reports that it has already issued purchase orders for every piece of equipment deemed critical —turbines and modules among them— and that manufacturers are producing them, with an estimated execution period of 45 to 46 months.
The company tells the market that the project has been «submitted to be approved under the RIGI», with 45 months of construction and start-up expected in March 2030.
The TGS board takes the final investment decision on the Integrated NGLs Project and signs the commercial agreements with YPF, Pluspetrol, Pluspetrol Cuenca Neuquina and Chevron Argentina verif. Verbatim from the SEC filing: «On June 10, 2026, the Company's Board of Directors approved the development of the Integrated NGLs Project, to be carried out through its subsidiaries Procesadora de Gas del Sur S.A. (PGS) and Midstream de Gas del Sur S.A. (MGS), incorporated as Single Project Vehicles (VPU)» verif.
TGS presents the project in New York: around USD 3 billion, 45 months of construction, four provinces, 4,000 direct and 15,000 indirect jobs and exports of around USD 1.2 billion a year.
What it leaves in Neuquén
jobs, works, taxes, promises and the outlook
The works that stay behind
The infrastructure that stays standing once the works end, with its size and its source.
Liquids export pipeline from Tratayén to Bahía Blanca
Productiveinches in diameter and 577 km according to the investor presentation, 477 km according to the earnings presentation issued the same day
the basin's whole liquids chain and the four provinces it crosses: Neuquén, Río Negro, La Pampa and Buenos Aires
⚠️ The company published TWO lengths on the same day, August 3, 2026, and neither is picked: the investor presentation says «20” Poliduct - 577 km» and the earnings presentation says «477-km NGL pipeline»; the material event of June 10 speaks of a pipeline of about 577 km. The same slides separately describe the Perito Moreno gas pipeline, owned by ENARSA and operated by TGS, at 573 km verif. The 573 km the press published in March for this pipeline match the length of that gas pipeline, and that is why they are not used thesis.
Vaca Muerta gathering pipeline to segregate the rich gas stream
Productiveaccording to the investor presentation; about 100 km according to the SEC filing of June 10
the basin's producers: it is what allows the liquids-rich stream to be separated before it enters the transport system
Verbatim from the project slide: «New Gathering Pipeline - 97 km» verif. The SEC filing of June 10, on the signing of the agreements, describes it as a segregation pipeline of about 100 km which, together with the Tratayén processing plant, with an estimated capacity of 43 million cubic metres a day, makes up the USD 1.1 billion investment on the Neuquén side verif.
Two new processing modules at the Tratayén plant
Productivethe province of Neuquén: it is the facility that turns rich gas into separated liquids, and it stays on the Neuquén side of the chain
Verbatim from the project slide: «2 New Processing Modules (4 modules in total)» at the Tratayén plant. It is the work of the Neuquén vehicle, Procesadora de Gas del Sur, which concentrates USD 1.1 billion of the project's USD 3 billion.
Liquids fractionation plant at the Cerri complex, Bahía Blanca
Productivemillion tonnes a year of propane, butane and natural gasoline
the petrochemical and export chain of Bahía Blanca: it is where the liquid is split into the products that get sold
Verbatim from the project slide: «New Fractionation Plant (2.7 MM mt/year C3+)». The earnings presentation of the same day pins down where: «Fractionation plant in Cerri».
Export terminal with storage at Puerto Galván
Productivethe port of Bahía Blanca and the country's whole liquids export chain
Verbatim from the project slide: «New Export Terminal (1 Tk 100,000 m3 C3 / 1 Tk 70,000 m3 C4 / 2 Tks 60,000 m3 C5+)» at the Galván port in Bahía Blanca verif. It is the work of the Bahía Blanca vehicle, Midstream de Gas del Sur, which concentrates USD 1.9 billion verif.
What it already pays in taxes and royalties
The project has been filed under the RIGI and has not been approved yet. Royalties and production taxes begin with operation.
Who promised what
We have not surveyed the public promises about this project. A dated, verifiable commitment with its source closes them.
What could stall it
risks and how to track them
- What could stall it — We have not documented this project’s risks. An identifiable vector with its source closes them.
- How to tell whether it is advancing — We have not defined this project’s indicators: what observable fact marks its progress still has to be identified.
How we verified this
the act, the gaps and the sources
The RIGI act, in detail
The project has been filed under the RIGI and has not been approved yet. The instrument is published in the Boletín Oficial once the Committee approves the accession.
What we could not confirm
There are 4 in this project. Each says why it could not be confirmed and what it would take to close it.
H-01When construction starts and when operation begins+
The schedule of a RIGI project is read in the recitals of its admission resolution, and this project has no resolution published in the Official Gazette yet: it has been filed or announced, not approved. What circulates in the press are tentative company dates, with no act fixing them.
H-02How long the pipeline actually is: 577 km or 477 km+
Both figures were published by the same company on the same day, August 3, 2026: 577 km in the investor presentation and 477 km in the earnings one. We do not average them, we do not take the larger one and we do not choose quietly: both are published. ⛔ And the figure that circulated before, 573 km, is ruled out: it matches the length of the Perito Moreno gas pipeline, another asset TGS operates for ENARSA.
H-03Who is building it: not a single construction contractor has been made public+
Neither the assembly, nor the pipe laying, nor the fractionation plant, nor the terminal has an awarded contractor with a name, an amount and a date in any open source. What is confirmed is that the tendering exists: the company said in June 2025 that it had already received equipment bids and launched an assembly tender, and in August 2026 that the critical equipment orders had gone out. The winners were not published. ⚠️ And there is a confusion worth avoiding: the joint venture with SACDE that appears in TGS's financial statements belongs to the Perito Moreno gas pipeline, not to this project.
H-04How much processing capacity the two new Tratayén modules add+
The company publishes that there are two modules and that the plant ends up with four, and the material event of Jun 11, 2026 gives an estimated capacity of 43 million m³ a day for the complete plant, but not how many cubic metres a day each new module adds.
We look at what your company does and tell you whether we see a sign that it fits this market, with the evidence behind it. If we do not see one, we say so too and name the condition that would change it. One page as a dated PDF, within 48 working hours.
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