Karakterisasi Reservoar Menggunakan Aplikasi Seismik Atribut Dan Inversi Seismik Impedansi Akustik, Studi Kasus Lapangan Teapot Dome, Wyoming

Nur Muhammad Zain, Wien Lestari, Firman Syaifuddin
Submission Date: 2017-07-30 08:18:59
Accepted Date: 2017-12-31 15:38:17

Abstract


Lapangan Teapot Dome, Wyoming terletak di Powder Basin yang merupakan cekugan prospek hidrokarbon. Data yang digunakan pada penelitian ini yaitu data seismik 3D Post Stack dan 7 data sumur. Zona target terletak pada F1WC dan Redpeak. Zona target memiliki litologi berupa sand dan shaly sand. Dilakukan karakterisasi reservoar pada kedua zona target guna mengevaluasi zona. Kedua data diintegrasi menggunakan metode inversi berbasis model dan metode seismik multiatribut. Metode inversi berbasis model dilakukan guna memprediksi impedansi akustik. Metode seismik multiatribut menggunakan lebih dari satu atribut untuk memprediksi parameter sumur. Parameter yang dicari pada penelitian ini yaitu porositas sehingga didapat persebaran porositas dalam volume seismik. Digunakan pula metode Probabilistic Neural Network guna meningkatkan hasil korelasi antara data seismik dengan data sumur saat memprediksi porositas. Berdasarkan hasil yang didapatkan diketahui bahwa karakter reservoar zona F1WC yaitu impedansi akustik pada rentang 27000-34000 (ft/s)(gr/cc) dan porositas 8-11%. Sedangkan untuk zona RDPK mempunyai rentang nilai impedansi akustik 34000-49000 (ft/s)(gr/cc) dan porositas 5-10%. Berdasarkan justifikasi karakter log, inversi, dan multiatribut diketahui bahwa kedua zona target merupakan zona prospek hidrokarbon.

Keywords


Karakterisasi Reservoar; Model Based Inversion; Probabilistic Neural Network

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