Australia-based Santos has spudded the AAL-4X appraisal well on the Northwest Natuna production sharing contract (PSC) in offshore Indonesia.
AAL-4X is at a total vertical depth subsea (TVDSS) of 200m in a 24in hole, and will be drilled to a planned maximum of 1,232m TVDSS.
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Drilling is expected to take around 48 days for completion.
Santos will use the Raniworo jack-up drilling rig to drill the well in depths of 72m.
The Natuna PSC consists of the Ande Ande Lumut (AAL) oil project, which includes the K Sand reservoir with 101 million barrels gross recoverable oil, and the underlying G Sand reservoir.
The oil project came with an approved plan of development using a wellhead platform with over 40 production wells and a leased floating production, storage and offloading vessel.
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By GlobalDataDrilling of the AAL-4X appraisal well is aimed at targeting the G Sand reservoir, which is estimated to contain 289 million barrels gross oil in place with 36 million barrels of gross recoverable oil.
The G Sand appraisal is expected to help facilitate the preparation of plan of development for the resource.
The resource is planned to be developed in conjunction with the already approved K Sand development.
Northwest Natuna is equally owned by AWE Limited and Santos.
