TGT offshore Vietnam oil field review confirms strong productivity

Offshore staff

LONDON – SOCO says the TGT development in block 16-1 off southern Vietnam has been delivering more than 40,000 b/d of oil, with no significant impact on the main reservoir performance parameters.

Although alignment issues remain with Petrovietnam over the speed of raising production levels, SOCO is confident that a rate of at least 55,000 b/d can be attained by this summer.

TGT is a complex field with three main reservoir horizons—the upper and lower Miocene 5.2 and the Oligocene C— with around 55 individual producing intervals.

To date, it appears that all the wells can produce oil at high rates with minimal drawdown, and productivity from the reservoir intervals perforated has met or exceeded pre-development model prognoses.

Stable flowing pressures of the initial producer wells suggest a strong level of aquifer pressure support, which would defer the need for water injection. And initial interference tests have confirmed a high degree of connectivity within the main sands.

However, SOCO says more performance data is needed to establish the most effective way to fully exploit the field.

Drilling of the Phase II wells from the H4 platform in the southern part of the TGT field began in 3Q 2011. Production from H4 should start in July or August.

There is additional potential in undrilled and unappraised fault blocks. The partners are looking to accelerate drilling of these areas.

In the western part of block 9-2, also in the Nam Con Son basin, SOCO is a partner in the producing Ca Ngu Vang (CNV) field operated by the HVJOC consortium. This is currently delivering 6,800 b/d of oil and 18.3 MMcf/d of gas and gas/liquids. SOCP is pushing for an additional production well to efficiently drain the field’s main producing area.

A program is under way to install a separator and associated metering facilities on the Vietsovpetro-operated Bach Ho CPP-3 platform, which receives CNV’s production. Commissioning of the equipment, due to be completed by end-May, should provide more accurate allocation of CNV hydrocarbons within the Bach Ho production complex, adding up to 2,000 boe/d to the liquids stream.

3/14/2012

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