Belut Laut, along with Gajah Laut Utara-1 and the successful appraisal of the Ca Rong Do discovery in Vietnam earlier this year, has confirmed the potential for hydrocarbons within the Oligocene section in the Nam Con Son basin, according to Premier Oil.
The ongoing sub-surface interpretation will now be focused to prospects at shallower depths where good reservoir properties are preserved up dip from proven source rocks.
At least five such prospects have been identified in the Tuna acreage and also in the neighboring Block 07/03 in Vietnam, which Premier plans to drill the first in the second half of 2012.
The CS-N2P well, a development production well for the Chim Sao project, has intersected the shallow part of a previously undrilled fault terrace to the north west of the Chim Sao field.
Based on Logging While Drilling data, the well encountered a 20 meter oil column in an independent closure within good quality Upper Dua Sandstones.
The plan is to appraise this new accumulation as a near-field tie-back opportunity via the CS-N1P development well, through which wire-line logs and fluid samples will be acquired. The results of this well are expected in October.
"We have learnt from the wells drilled on the Tuna acreage and will now target lookalike prospects in the Nam Con Son basin where the Oligocene reservoirs are at shallower depths and are therefore of better quality,” said Simon Lockett, chief executive officer of Premier Oil.
The discovery of new resources close to the Chim Sao development is very encouraging and we look forward to the appraisal results later this year," he added.
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