PENENTUAN SWELLING FACTOR DAN TEKANAN TERCAMPUR MINIMUM UNTUK PENERAPAN INJEKSI GAS KARBONDIOKSIDA DI LAPANGAN MINYAK

Dedy Kristanto, Hariyadi ., Wibowo ., Windyanesha Paradhita

Sari


Pengembangan (swelling) minyak dan tekanan tercampur minimum (TTM) merupakan dua faktor yang penting dari mekanisme pendesakan gas karbondioksida (CO2 ) yang terjadi di reservoir untuk penerapan injeksi CO2 di lapangan dalam upaya meningkatkan perolehan minyak tahap lanjut. Dalam paper ini penentuan swelling factor dilakukan menggunakan PVT cell, dimana fluida rekombinasi diinjeksikan dan dikondisikan pada temperatur reservoir. Sedangkan penentuan TTM antara sampel minyak dengan gas CO2 dilakukan menggunakan tiga cara, yaitu persamaan empiris, secara korelasi dan percobaan laboratorium menggunakan Slimtube. Berdasarkan hasil analisa swelling test selama proses injeksi gas CO2 sampai 46,82% mol, tekanan gelembung meningkat secara bertahap dari 410 psig sampai 2200 psig dan faktor swelling meningkat dari 1.0 sampai 1.442. Penentuan TTM menggunakan persamaan empiris (2807 Psig) dan korelasi Holm & Yosendal (2750 Psig) adalah yang paling mendekati dengan hasil penentuan dari analisa laboratorium (2800 Psig). Didasarkan pada besarnya tekanan rekah formasi di Lapisan F sebesar 2200 Psig dan TTM sebesar 2800 Psig, maka dalam penerapannya di lapangan injeksi gas CO2 hanya dapat dilakukan secara pendesakan tak tercampur.

Kata Kunci


Tekanan Tercampur Minimum, Karbondioksida (CO2 ), Slimtube, Sweeling Factor

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Referensi


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