Thailand’s national upstream company PTTEP is preparing to drill a second appraisal well on its major Lang Lebah sour gas discovery offshore Malaysia, ahead of a final investment decision targeted for early next year on the multibillion-dollar development.

The operator has chartered the Malaysia-flagged anchor-handling tug supply vessel Cassandra VI to perform a seabed survey of the Lang Lebah-3 appraisal well location on Block SK 410B offshore Sarawak.