Lan Do

Location and Geology

• The Lan Do gas field is located in Block 06.1 of the Nam Con Son Basin, approximately 365 kilometers offshore of the southern coast of Vietnam.
• The field is situated at a water depth of about 185 meters (607 feet).

Discovery and Development

• The Lan Do and Lan Tay fields were discovered in 1992-1993.
• The development of the Lan Do field is part of the integrated Nam Con Son Gas Project.

Ownership and Operation

• The current operators and owners of the Lan Do field include Zarubezhneft JSC (35%), PetroVietnam (20%), and Oil and Natural Gas Corporation (45%).
• Historically, TNK-BP (now part of Zarubezhneft) played a significant role in the development and operation of the field, having acquired a 35% stake from BP in 2010.

Production and Reserves

• The Lan Do field started production in 2018.
• The field has an estimated recoverable reserve of around 72-89 million barrels of oil equivalent (mmboe) of gas and 0.2-0.3 mmboe of condensate.
• The initial gas reserves are estimated at approximately 23,000 million cubic meters.
• The field is expected to produce about 2 billion cubic meters (bcm) of gas per year, with a maximum output of 175 million standard cubic feet per day (mmscfd).

Infrastructure and Facilities

• The gas from the Lan Do field is transferred to onshore gas processing facilities via the Nam Con Son Pipelines (NCSP), which include a 362km long high-pressure offshore subsea pipeline and a 9km long onshore pipeline.
• The gas is then supplied to the Phu My power complex.
• The Lan Do field is tied back to the existing Lan Tay offshore platform via a 28km, 12-inch flow line and a control umbilical.

Development Phases

• The development of Block 06.1, which includes the Lan Do and Lan Tay fields, was carried out in three phases:
  • The first phase was completed in 2002-2003 with the start of production from the Lan Tay field in January 2003.
  • The second phase involved the installation of compression facilities at the Lan Tay platform, completed in 2008.
  • The third phase focused on the development of the Lan Do field and additional drilling at the Lan Tay field.

Production Capacity and Life

• Block 06.1, which includes the Lan Do field, has a production capacity of 4.7 bcm per annum.
• The Lan Do field is expected to have a production life of approximately 20 years.

Additional Details

• The development of the Lan Do field involved significant subsea intervention and drilling activities. For example, a 32-day subsea intervention campaign was completed at the Lan Tay field in November 2011 to facilitate production from Lan Do, and two subsea development wells were drilled at the Lan Do field in April 2012.