Rehabilitasi fasilitas dolphin offshore: metode sand-jacket untuk efisiensi biaya dan percepatan jadwal
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Fasilitas Dolphin sebagai struktur tambat (mooring structure) operasi unloading crude oil di Wilayah Kerja (WK) X, PT Y mengalami degradasi struktural progresif akibat korosi eksternal yang mengancam kelangsungan produksi. Penelitian ini bertujuan menganalisis penerapan metode sand-jacket installation sebagai solusi rehabilitasi yang lebih cepat dan efisien dibandingkan Detail Engineering Design (DED) konvensional. Melalui pendekatan studi kasus instrumental yang mengintegrasikan analisis teknis, evaluasi biaya-manfaat, dan Earned Value Management (EVM), ditemukan bahwa metode ini berhasil menyelesaikan rehabilitasi dalam 10 bulan (April 2021–Februari 2022) dengan total biaya ±IDR 39 M — menghasilkan penghematan CAPEX sebesar ±76,6% dari anggaran DED konvensional IDR 160 M. Nilai oportunitas produksi yang dipertahankan diestimasi ±IDR 1,1 triliun berkat percepatan 3,2 tahun. Proyek diselesaikan dengan zero HSE incident dan integritas struktural memenuhi standar API RP 2A-WSD. Secara implikatif, metode ini layak dijadikan standar teknis untuk rehabilitasi jacket offshore di perairan dangkal Indonesia, mendorong integrasi nilai oportunitas produksi dalam evaluasi proyek kapital, dan berkontribusi pada pembaruan regulasi pengadaan KKKS.
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