Hai Thach

Location

The Hai Thach field is located in the Nam Con Son Basin, which is part of the Cuu Long Basin, offshore southern Vietnam.

Field Characteristics

• The Hai Thach field is one of the largest gas and condensate producing fields in Vietnam. It is characterized by high-pressure and high-temperature (HPHT) reservoir conditions, which pose unique challenges for drilling and production.

Infrastructure

• The field is connected to the Nam Con Son 2 gas pipeline project. This pipeline starts from the Hai Thach wellhead platform (WHP) and extends through various other fields before reaching the onshore processing facilities. Specifically, the pipeline passes through the Thien Ung field central processing platform (CPP) and the Bach Ho field before culminating at a landfall point in Long Hai.

Development Phases

• The Nam Con Son 2 gas pipeline project, which includes the Hai Thach field, is developed in two phases. Phase I involved the installation of a 151.35km-long, 26-inch diameter offshore pipeline originating from the Thien Ung CPF and ending at the Bach Ho pipeline tie-in point. This phase connects gas from the Thien Ung and Dai Hung fields to the landfall facility and was completed in 2015.

Contractors and Operators

• The Vietsovpetro (VSP) joint venture was awarded the engineering, procurement, and construction (EPC) contract for the project. Other contractors involved include PetroVietnam Engineering for the front-end engineering and design (FEED) study, Dorsch Gruppe for industrial engineering services, and TechnipFMC for the engineering and installation of the pipeline.

• PTSC (PetroVietnam Technical Services Corporation) has also been involved in various oil and gas projects in Vietnam, including those related to the Nam Con Son Basin, although their specific role in the Hai Thach project is not detailed in the provided sources.

Production and Capacity

• The Nam Con Son 2 gas pipeline, which includes gas from the Hai Thach field, has a total capacity of approximately 20 million standard cubic meters per day (MMSCMD) of gas and 1,320 tons of condensate per day.

Geotechnical and Rock Physics Aspects

• The field's reservoirs are subject to detailed rock physics analysis to characterize the deep and strongly cemented gas sands. Studies have been conducted to apply adapted rock physics templates (ARPT) for better understanding and managing the reservoir properties.

In summary, the Hai Thach project is a critical part of Vietnam's offshore gas and condensate production, integrated into the larger Nam Con Son 2 gas pipeline project. It involves complex infrastructure, advanced engineering, and specialized geological analysis to manage its HPHT conditions.