The $US705 million ($A862.3 million) contract will result in the conversion of a second Moss-type LNG carrier, the GIMI, into an FLNG unit.

Keppel won a similar contract from Golar to convert the HILLI LNG carrier to FLNG last year.

"We are happy that Golar LNG is proceeding with their second FLNG conversion and would like to thank them for once again entrusting Keppel Shipyard as their lead contractor of choice," Keppel managing director marine and technology Michael Chia said.

"This second contract comes just six months after the first contract and we are encouraged by this positive development. We, together with Golar LNG and our partner Black & Veatch, are confident that FLNG conversion solutions are indeed the answer to a need to bring small and mid-scale LNG supplies to market in a more timely and cost-efficient manner."

GIMI represents the first of two options which were part of the HILLI contract, a conversion worth about $735 million with a completion date set in the March quarter of 2017.

Keppel's work scope will include design, engineering and procurement of marine systems, and all conversion-related construction services.

Keppel's partner, Black & Veatch, will provide design, procurement and commissioning support services for topsides as well as liquefaction process technologies.

GIMI conversion works are expected to begin in November, but long-lead primary equipment will be ordered earlier.