KARAKTERISASI RESERVOAR MENGGUNAKAN METODE INVERSI ACOUSTIC IMPEDANCE PADA LAPANGAN "IK" FORMASI TALANGAKAR CEKUNGAN SUMATERA SELATAN

INES KUSUMA NINGRUM, 1015051026 (2015) KARAKTERISASI RESERVOAR MENGGUNAKAN METODE INVERSI ACOUSTIC IMPEDANCE PADA LAPANGAN "IK" FORMASI TALANGAKAR CEKUNGAN SUMATERA SELATAN. Fakultas Teknik, Universitas Lampung.

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1. ABSTRACT.pdf

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2. ABSTRAK.pdf

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11. DAFTAR ISI.pdf

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Abstrak

Lapangan “IK” merupakan Anticlinorium, yang memanjang berarah barat-timur yang dipisahkan oleh patahan turun dengan arah relatif utara-selatan. Lapangan ini mengindikasikan terdapat reservoar hidrokarbon. Metode seismik impedansi akustik dapat memberikan gambaran fisis batuan dalam karakterisasi reservoar hidrokarbon. Untuk mengkarakterisasi reservoar dilakukan inversi agar mendapatkan model impedansi akustik pada Lapangan “IK” dengan metode berbasis sparse spike dan model based. Uji sensitivitas dilakukan dengan melakukan crossplot terhadap P-Impedace dan Gamma Ray, serta crossplot antara P-Impedance dan porosity. Crossplot dan crosssection mampu memisahkan litologi shale dan sand dengan baik pada zona target. Nilai Gamma Ray tinggi menunjukan litologi shale dengan impedansi akustik yang tinggi. Sebaliknya nilai Gamma Ray rendah menunjukan litologi non-shale dengan impedansi akustik rendah. Berdasarkan penelitian ini didapatkan bahwa pemodelan dengan metode model based mampu menghasilkan gambaran karakterisasi reservoar hidrokarbon lebih baik daripada metode sparse spike. Reservoar batupasir pada Lapangan “IK” merupakan low impedance, dengan high resistivity, low density, high porosity, dan low gamma ray, yang menunjukan bahwa reservoar ini mengandung hidrokarbon berupa oil. Berdasarkan analisis yang dilakukan terhadap peta waktu struktur, peta AI dan peta pesebaran porositas didapatkan bahwa zona target merupakan daerah yang masih bisa dikembangkan. Kata kunci : inversi, impedansi akustik, model based, reservoar, sparse spike “IK” field is anticlinorium which is longer from west to east that separated by normal fault with relatif direction from north to south. This field indicate has hidrocarbon reservoir. Acoustic Impedance seismic method can give the result of rock physics in hidrocarbon reservoir characterization. To characterize of reservoir used inversion to get the model of acoustic. In the “IK” field with the method of sparse spike and model based. The test of sensitivity did by using toward crossplot P-Impedance and Gamma Ray, along with crossplot between P-Impedance and Porosity. Crossplot and crossection capable of separate shale litology and sand with good in the target zone. The high value of Gamma Ray showing shale litology with high acoustic impedance. The opposition of low Gamma Ray showing non-shale litology with low acoustic impedance. According by this reseach obtained that modelling with model based method afford to sketch the result of hidrocarbon reservoir characterization better than sparse spike method. Sandstone reservoir in the field “IK” consistute low impedance with high resistivity, low density, high porosity and low gamma ray afford that this reservoir contains oil hidrocarbon. According by the analize carry out of structure time map, AI map, and spread of porosity map be found that target zone is develop area. Keyword : inversion, acoustic impedance, model based, reservoir, sparse spike

Tipe Karya Ilmiah: Skripsi
Subyek: A General Works = Karya Karya Umum
Program Studi: Fakultas Teknik > Prodi Geofisika
Depositing User: 3745354 . Digilib
Date Deposited: 06 Feb 2015 02:25
Last Modified: 06 Feb 2015 02:25
URI: http://digilib.unila.ac.id/id/eprint/6860

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