Ikutan sharing..... Menurut saya sedapat mungkin kita menggunakan frekuensi rendah dalam modeling u/ inversi seismic, untuk menghindari kesalahan yang 'relative' besar dari karakterisasi reservoir target. Dengan menggunakan frekuensi rendah kita mengasumsikan suatu formasi yang 'relative' homogen dengan 'ketebalan'/layer tertentu.
Menurut pengalaman juga, penggunaan frekuenci rendah tidak selamanya 'tokcer' untuk mengidentifikasi karakter reservoir target. Untuk kasus target reservoir yang relative tipis atau 'pinch out' kadang frequency rendah tidak berhasil, sehingga kita perlu memainkan frequency berapa yang tepat untuk memodelkan karekter seperti itu, agar reservoir target yang kita harapkan dapat terdeskripsi dgn baik. Jadi penggunaan frequency rendah dalam modeling tergantung dari kasus reservoir yang kita hadapi (kuncinya thickness reservoirnya). Secara umum semakin tinggi frequency, semakin besar pula kemungkinan kesalahannya. Jadi sedapat mungkin menggunakan frequency yang 'relative' rendah dalam modeling. Ada baiknya kita coba bandingkan ketika menggunakan frequency 'relative' tinggi & 'relative' rendah, kemudian crosscheck tingkat kesesuaiannya dengan data well yang ada. Salam, Yudi -----Original Message----- From: Leonard Lisapaly [mailto:[email protected]] Sent: Friday, May 14, 2010 7:28 AM To: [email protected]; HAGI-net Subject: RE: [iagi-net-l] Model frekuensi rendah dalam inversi seismik Kontribusinya besar dan karena itu harus ekstra hati-hati dalam membangun low frequency model. Yang ideal adalah kalau jumlah sumur banyak. LL -----Original Message----- From: Trisakti Kurniawan [mailto:[email protected]] Sent: Thursday, May 13, 2010 9:25 AM To: HAGI-net; IAGI-net Subject: [iagi-net-l] Model frekuensi rendah dalam inversi seismik Bapak2 dan Ibu2, Ingin bertanya berkaitan subject diatas, seberapa besar kontribusi model frekuensi rendah dalam proses inversi? Bagaimana sebaiknya model tersebut dihasilkan? Mohon pengalaman dari bapak2 & ibu2 semua. 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