Structural Design of A Three-Legged Fixed Offshore Platform in Mahakam Block, East Kalimantan
Faiz Akbar Ramadhan 1 dan Ir. Rildova, M.T., Ph.D 2
Program Studi Teknik Kelautan
Fakultas Teknik Sipil dan Lingkungan, Institut Teknologi Bandung,
Jl. Ganesha 10 Bandung 40132
1 faiz.akbar@students.itb.ac.id dan 2 rildova@ocean.itb.ac.id
ABSTRACT – Energy is one of the most important elements in life. Indonesia is a country that is rich
in energy sources, especially fossil energy such as oil and gas. Exploration and exploitation activities of
fossil energy have been carried out on the seas, so expertise is needed to design and analyze the structure
of offshore platforms. One of the blocks that has abundant fossil energy resources is the Mahakam
Block. In this final project, a three leg fixed jacket platform is modeled using SASC software. The
offshore platform structure design must meet 3 analysis criteria, namely in-place, seismic, and spectral
fatigue analysis. All analysis were carried out with reference to the API RP-2A WSD standard.
Based on the in-place results, the structural model has met the standard with the greatest unity check
value of 0.94 at the main deck framing. Pile penetration as deep as 90 and 110 meters for each pile has
also met the requirements with a minimum safety factor of 1.92 during storm conditions. The earthquake
in the Mahakam area is relatively small, so the results of the seismic analysis for the SLE and DLE
earthquakes all met the requirements with a maximum unity check value of 0.83 at the jacket to deck
leg connection. In the fatigue analysis, all joints have met the structural service life requirements with
the smallest service life of 2493.248 years located at boatlanding.
Keywords: fixed platform, API RP-2A WSD, in-place, seismic, spectral fatigue.
Loading...
Reload document 
Open in new tab