The FPSO Berge Enterprise, later renamed Yuum K’ak’ Naab, was converted at the Sembawang Shipyard in Singapore by Sembcorp Marine under an $88m contract. The 360,700dwt FPSO is 340m long, 65m wide and 31.5m tall.
Originally built by Mitsui, the conversion project encompassed the inclusion of an internal disconnectable submerged turret system provided by APL. This 12-line mooring system is connected to 35m pile anchors, and the wellstream enters via eight 15in flexible risers and a midwater arch.
Other changes include the installation of topsides modules, the expansion of the living quarters to accommodate 110 personnel and a flare tower.
A feature of the KMZ field is that the oils have different viscosities. Ku has an API of 22°, while the Maloob and Zaap fields have an API of 12°. The Yuum K’ak’ Naab has segregated storage facilities with one tank able to store one million barrels of blended crude similar in chemistry to Cantarell’s 21°API, known as the Maya blend. The FPSO started production in June 2007.