Vincentius Aditya Wira Sapta W., R (2015) ANALISA IMPEDANSI AKUSTIK (AI) DAN PERSEBARAN POROSITAS PADA FORMASI TALANGAKAR LAPANGAN “PETRICHOR” CEKUNGAN SUMATERA SELATAN. Other thesis, UPN ''VETERAN'' YOGYAKARTA.
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Abstract
Penulis telah melakukan penelitian pada Formasi Talangakar bagian atas yang
terletak di Lapangan “Petrichor” Cekungan Sumatera Selatan. Penelitian ini
dilakukan dengan tujuan untuk menentukan nilai AI pada zona reservoar
berdasarkan hasil inversi, serta mengetahui persebaran reservoar berdasarkan
sayatan impedansi akustik dan sayatan porositas.
Penelitian ini mengunakan data seismik yang terdiri atas tiga (3) data PSTM 3D
yaitu Full Offset, Near Offset, dan Far Offset dengan menggunakan empat (4)
sumur yakni sumur SPT-1, SPT-3, SPT-4, dan SPT-5 serta data Checkshoot.
Metode yang dipakai pada penelitian ini adalah metode seismik inversi model
based, dimana akan menghasilkan suatu model inversi berupa model inversi
impedansi akustik. Data seismik sebagai input dan data sumur dipakai sebagai
kontrol. Hasil dari penelitian ini dilakukan sayatan impedansi akustik dan
sayatan porositas.
Berdasarkan hasil Inversi yang dilakukan pada Lapangan “Petrichor” zona
reservoar yang berupa Batupasir memiliki nilai impendansi akustik rendah yang
berkisar antara 7100-7280 (m/s)*(gr/cc) dan memiliki porositas yang berkisar
antara 18% hingga 25%. Pada Peta sayatan impendansi akustik dan porositas
menunjukan adanya variasi nilai AI maupun porositas, penyebaran porositas
maupun AI pada penampang sayatan menunjukan terdapat beberapa zona yang
memiliki harga porositas maupun AI yang berkorelasi dan terdapat pada zona
tinggian sesuai peta struktur waktu.
Kata Kunci : Inversi, Impedansi akustik, Sayatan porositas
The author has conducted research on top Talangakar Formation located on the
"Petrichor" Field South Sumatra Basin. This study was conducted to determine
the value of AI in the reservoir zones based on the results of the inversion, as well
as knowing the distribution of reservoir based incision acoustic impedance and
porosity incision.
This study uses seismic data and well data that consisting of three 3D PSTM data
(Full Offset, Near Offset and Far Offset) which has the well data are well SPT-1,
SPT-3, SPT-4, and SPT-5 and also Check shoot. The method used in this study is
a model-based method of seismic inversion, which will result in an inversion of
the model in the form of acoustic impedance inversion models. Where seismic
data as input and well data is used as a control. The results of this research
incision acoustic impedance and porosity incision.
Based on the results of the Petrichor Field Inversion conducted in the form of
Sandstone reservoir zones have a low acoustic impedance values which ranged
between 100-7280 (m/s)*(gr/cc) or 23300-23900 (ft/s)*(gr/cc) and has a porosity
ranging from 22% to 32%. On the map incision acoustic impedance and porosity
shows the variation of AI and porosity values, spread of porosity and AI in cross
incision revealed that there were several zones of porosity and AI have prices that
are correlated and the corresponding altitude zone time structure map.
Keywords: Inversion, acoustic impedance, porosity incision
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Geography |
| Depositing User: | Erny Azyanti |
| Date Deposited: | 20 May 2016 06:52 |
| Last Modified: | 20 May 2016 06:52 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/1962 |
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