Immediately after its establishment, under the direction of the Government and the Vietnam National Oil and Gas Group, PV GAS began implementing the first gas system – the Bach Ho Gas System, later expanded into the Cuu Long Gas System. It comprises: the offshore gas compression platform; the pipeline system carrying gas from the oil and gas fields of the Cuu Long basin ashore and on to Phu My; the Dinh Co Gas Processing Plant; the liquid product storage and export terminal at Thi Vai; and the gas distribution stations. To bring gas ashore quickly to meet demand, the system was built in phases.

In early Q2/1995, the early gas-to-shore phase was completed; the first gas was brought ashore on 26/04/1995 from the Bach Ho field to supply the Ba Ria Power Plant at 1 million m³/day, helping the State budget save a very large amount of foreign currency previously spent on imported diesel to fuel the power plant.

Subsequently, with the completion of the small and large offshore compression platforms and the onshore gas pipeline system, the gas-to-shore capacity was raised step by step to 2 million m³/day in early 1997, 3 million m³/day in late 1997 and over 5 million m³/day in 2002, to carry additional gas from other fields in the Cuu Long basin: Rang Dong (2002), Ca Ngu Vang, Phuong Dong (2008), Su Tu Vang, Su Tu Den (2009), Vom Bac, Rong, Doi Moi (2010), Te Giac Trang (2011), Hai Su Den, Hai Su Trang (2013), Dai Hung (2015), Thien Ung (2016)… to power plants, fertiliser plants and other industrial customers in Ba Ria - Vung Tau, Dong Nai and Ho Chi Minh City.

The completion and commissioning of the Dinh Co Gas Processing Plant and the PV GAS liquid product storage and export terminal in late 1998 was an event of great technical, economic and social significance. For the first time, LPG and condensate were produced in Vietnam. From May 1999, PV GAS met most of the domestic LPG demand with good quality and competitive prices, replacing a product that Vietnam had long had to import.

To date, the Cuu Long Gas System has continued to develop, with the offshore gas compression platform; the 107 km gas pipeline from the Cuu Long basin to shore (design capacity: 2 billion m³ of gas per year) to consumers in Ba Ria - Vung Tau, Dong Nai and Ho Chi Minh City; the Phu My Gas Distribution Center; the Dinh Co Gas Processing Plant (design capacity: 2 billion m³ of gas, 350 thousand tonnes of LPG and 130 thousand tonnes of condensate per year); and the liquid product storage and export terminal at Thi Vai (design storage capacity: over 71,000 tonnes of LPG and 46,000 m³ of condensate; two berths of 60,000 DWT and 2,000 DWT).

Building on the great achievements of the Cuu Long Gas System, PV GAS went on to implement the second gas system – the Nam Con Son Gas System – with foreign partners that are major oil and gas groups in the world. It comprises a pipeline of over 400 km from the fields in the Nam Con Son basin and the Nam Con Son Gas Processing Plant. In December 2002, the Nam Con Son Gas System completed its important components, and the first gas from the Lan Tay and Lan Do fields was brought ashore to consumers. Subsequently, the Nam Con Son Gas System received additional gas from other fields in the Nam Con Son basin (Rong Doi and Rong Doi Tay in 2006, Chim Sao and Dua in 2011, Hai Thach and Moc Tinh in 2013).

To develop the gas consumption market in the South-West region, PV GAS invested in the PM3 – Ca Mau Gas System, with 325 km of offshore and onshore gas pipeline, a design capacity of over 2 billion m³ of gas per year, and the Ca Mau Gas Distribution Center, bringing gas from the PM3-CAA and 46 CN fields in the Malay – Tho Chu basin to the power and fertiliser plants in Ca Mau from May 2007. At the end of 2017, PV GAS put the Ca Mau Gas Processing Plant into operation to produce LPG and condensate, increasing the value of the PM3 gas. The PM3 - Ca Mau Gas System contributes to the economic development of Ca Mau province and the Mekong Delta.

Owing to certain technical limitations in the composition of the gas in the Song Hong basin and in the consumption market, investment in gas infrastructure in the North came relatively later than in the South.

The Ham Rong – Thai Binh Gas System, with 25 km of offshore and onshore gas pipeline and a design capacity of 500 million m³ of gas per year, began operating on 7/8/2015, supplying gas to industrial consumers in Thai Binh and neighbouring provinces and paving the way for the development of the gas consumption market in the North in the following years.

The Nam Con Son 2 project chain aims to develop Vietnam’s gas industry infrastructure in a coordinated manner in line with the master plan approved by the Prime Minister; to meet the need to gather, transport and process gas from the Su Tu Trang, Sao Vang – Dai Nguyet and Thien Ung – Dai Hung fields and to provide backup for the Bach Ho – Dinh Co pipeline; to add gas receiving and processing capacity and increase operational flexibility of the facilities; and to supplement the gas shortfall in the South-East region so as to ensure supply to existing consumers, serve economic development and safeguard energy security, while also laying the groundwork for developing fields in neighbouring areas in later phases.

The NCS2 pipeline system has an offshore pipeline of up to 330 km and 29 km of dry gas pipeline to the Phu My Gas Distribution Center to supply consumers.