UK supermajor Shell has taken the final investment decision on the phase four development of its Gumusut-Kakap-Geronggong-Jagus East deep-water development, with plans to develop two fields discovered in Bruneian waters through a tie-back to its existing Gumusut-Kakap production facilities offshore Sabah, East Malaysia.

Asian neighbours Malaysia and Brunei Darussalam last year formalised a unitisation agreement for the Gumusut-Kakap and Geronggong-Jagus East, paving the way for development of the two reservoirs straddling their maritime boundary.

The subsea phase four project will see four wells drilled and tied back to the Gumusut-Kakap semi-submersible floating production system, with first oil from this first phase of development expected in late 2024.