EVALUASI FORMASI BERDASARKAN ANALISIS PETROFISIKA PADA LAPANGAN "KHAIRUL", FORMASI TALANG AKAR, CEKUNGAN ASRI

Aldi Khairul Rahman

Abstrak


Lapangan “Khairul” di Cekungan Asri merupakan area prospektif dengan Formasi Talang Akar sebagai reservoir utama. Penelitian ini bertujuan untuk mengidentifikasi fasies, lingkungan pengendapan, serta karakteristik petrofisika batuan reservoir menggunakan data well log, core, dan mudlog dari empat sumur (AKR-1 hingga AKR-4). Hasil analisis menunjukkan empat fasies utama yaitu SH, FMSH, MS, dan SHFM yang terbentuk pada lingkungan fluvial hingga estuari seperti floodplain, tidal flat, delta plain, channel fill, dan delta front. Evaluasi petrofisika menunjukkan bahwa fasies MS dan FMSH memiliki kualitas reservoir terbaik dengan nilai volume serpih 0,116–0,135, porositas efektif 0,226–0,245, dan saturasi air 0,481–0,495. Zona prospek hidrokarbon ditentukan berdasarkan cut-off Vsh ≤ 0,35, porositas ≥ 0,15, dan Sw ≤ 0,7, dengan ketebalan net pay maksimum ±46 ft pada fasies channel fill.

Kata kunci: Cekungan Asri, Formasi Talang Akar, Fasies, Petrofisika, Well Log.


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Referensi


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DOI: https://doi.org/10.24198/bsc.v24i2.71196

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