Abstract

The Natuna AL reservoir contains the largest undeveloped gas accumulation in SE Asia and is strategically located near important markets. Full field development can sustain 2,400 million standard cubic feet per day (MMSCFD) of methane sales for about 40 years. The Natuna reservoir contains estimated recoverable hydrocarbons of 46 trillion standard cubic feet (TSCF) from a total gas in place of 222 TSCF, of which 71% is carbon dioxide (CO₂) and 0.55% hydrogen sulfide (H₂S). The CO₂ and H₂S add to the cost and complexity of the planned Natuna development.

Due to its large size, Natuna will likely be developed in phases to match market—requirements. It may ultimately provide sales in the form of pipeline gas, LNG, or both. One Natuna development scenario can produce 960 MMSCFD of methane pipeline gas. Alternately, the development plan could involve LNG sales from either an island-based plant or a floating LNG manufacturing plant.

The offshore process is configured to produce gas containing about 81% methane and heavier hydrocarbons and 18% CO₂. Separated carbon dioxide will be injected into an aquifer near the producing field for underground disposal.