KARAKTERISASI DECLINE PERFORMANCE DAN ANOMALI TEKANAN PADA SUMUR GEOTHERMAL BERBASIS DATA TIME SERIES
DOI:
https://doi.org/10.53026/prosidingsntem.v5i1.712Keywords:
geothermal, decline performance, anomali tekanan, analisis korelasi, ensemble detectionAbstract
Sistem panas bumi vapor-dominated menghadapi tantangan penurunan performa dan anomali tekanan pada sumur produksi. Penelitian ini mengkarakterisasi decline performance dan anomali tekanan pada tiga sumur produksi di lapangan panas bumi Y, Jawa Barat menggunakan data monitoring periode 1-20 Agustus 2024. Analisis korelasi Pearson digunakan untuk mengidentifikasi hubungan antar parameter operasional, comparative analysis untuk evaluasi performa sumur, dan ensemble anomaly detection menggunakan Z-score dan Interquartile Range untuk deteksi anomali. Hasil menunjukkan korelasi kuat antara tekanan jalur dan suhu jalur (r=0.980), serta hubungan negatif kuat antara wellhead pressure dan flow rate pada Well X1 (r=-0.814) dan Well X3 (r=-0.835). Well X3 menunjukkan performa terbaik dengan flow rate rata-rata 44.22 t/hr dan overall score 94.33. Anomali terjadi di Well X2 yang mengalami penurunan produksi 23.97% dalam 20 hari dengan variabilitas tertinggi 11.52%. Pola anomali tekanan terjadi pada periode 4-7 Agustus 2024 di semua sumur dengan penurunan tekanan 1.09-1.29 barg dan temperatur 2.83-5.37°C. Anomali ini mengindikasikan gangguan sistem yang memerlukan investigasi. Penelitian ini menyediakan framework untuk monitoring dan optimasi produksi sumur geotermal berbasis analisis data time-series.
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