Conrad spuds second Tambak well offshore Indonesia

Conrad Petroleum has started drilling the Tambak-1 well located in the Duyung PSC in the Natuna Sea offshore Indonesia, using the Asian Endeavour-1 jack-up rig. 

Conrad’s first well in the Duyung PSC, the Tambak-2, was spud in early October. The Tambak-2 well was primarily designed as an appraisal of the southern area of the Mako gas field.

By mid-October, the Tambak-2 well was drilled to a total depth of 503 meters true vertical depth subsea and the well was confirmed as a successful appraisal of the Mako gas field. The next step in the campaign was an extensive drill stem test (DST) program.

However, as reported in late October, Conrad hit a snag with the Drill Stem Testing at the Tambak-2 offshore well.

Following the successful appraisal at Tambak-2, the Asian Endeavour-1 jack-up rig has been on location since Friday, November 1 and drilling of the Tambak-1 well has started, according to Empyrean Energy, one of Conrad’s partners in the project.

The Tambak-1 well is located approximately 4.5 km north of the Mako South-1 location. Empyrean said that the well was designed to both appraise the extent of the Mako gas field as well to test the underlying Tambak prospect.

The well will be drilled as a vertical well and is prognosed to intersect the top of the intra-Muda reservoir at a depth of approximately 1,276 feet below sea level. The well will be deepened below the base Muda unconformity (at a depth of approximately 1,696 feet) to test the underlying Lower Gabus section.

The well is planned to total depth at approximately 4,500 feet below sea level. Total time to drill, log and test in the event of success is estimated to be approximately 33 days, after which the well will be plugged and abandoned and the rig de-mobilized.

The gross cost of the two-well program is expected to be approximately $17 million-19 million to the PSC partners on a fully tested basis, including rig mobilization and demobilization, for which Coro Energy is funding $10.5 million. Empyrean will fund 8.5% of the additional drilling campaign costs over and above the Coro funding.

Offshore Energy Today Staff


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