DETAIL KOLEKSI

Analisis Fasies Batugamping (interval 6810,0'-6929,0') Pada Formasi Tuban Berdasarkan Data Core, Well Log Dan Seismic Pada Lapangan Gemala, Blok Tuban, Jawa Timur.


Oleh : Adhyaksa Buana Nicaksana

Info Katalog

Nomor Panggil : 723/TG/2016

Penerbit : FTKE - Usakti

Kota Terbit : Jakarta

Tahun Terbit : 2004

Pembimbing 1 : Taat Purwanto

Pembimbing 2 : M. Irfani

Subyek : Seismic

Kata Kunci : Cekungan, Fasies


File Repositori
No. Nama File Ukuran (KB) Status
1. 2016_TA_GL_07200002_Daftar-Pustaka.pdf 14.26
2. 2016_TA_GL_07200002_BAB-V.pdf 15.25
3. 2016_TA_GL_07200002_BAB-IV.pdf 9728.42
4. 2016_TA_GL_07200002_BAB-III.pdf 945.62
5. 2016_TA_GL_07200002_BAB-II.pdf 532.78
6. 2016_TA_GL_07200002_BAB-I.pdf 229.28
7. 2016_TA_GL_07200002_HALAMAN-JUDUL---Copy.pdf 638.55
8. 2016_TA_GL_07200002_Lampiran.pdf 3083.07

L Lapangan Gemala, Blok Tuban terletak di Cekungan Jawa Timur dimana merupakan area pertumbuhan karbonat pada Formasi Tuban yang berumur Oligocene Akhir-Miocene Akhir. Lapangan Gemala memiliki 2 buah sumur yaitu SKW-1 dan SKW-2 yang memiliki data core, well log dan 3D seismik yang digunakan dalam penentuan fasies lithologi maupun pengendapan serta distribusi penyebaran fasies secara lateral dengan menggunakan metode sekuen stratigrafi. Dari analisa batuan inti (core) di sumur SKW-2 pada kedalaman 6810.0’-6929.0’ (MD) didapatkan 3 fasies lithologi utama yang terdiri dari fasies Packestone, fasies Bindstone, dan fasies Wackestone yang berdasarkan karakteristik batuan dan kandungan fosil serta mineralnya termasuk ke dalam carbonate reef build-up system. Fasies pengendapan yang terbentuk termasuk ke dalam lingkungan carbonate platform yang terdiri dari fasies Open Marine Shelf, facies Platform Margin Organic Reef, dan fasies Platform Foreslope. Hasil interpretasi log menunjukkan adanya marker berupa flooding surface yang dapat membagi menjadi 2 parasekuen set, yaitu : parasekuen 1 yang dibatasi oleh marker FS1-FS2 dan parasekuen 2 yang dibatasi oleh marker FS2-FS3. Terdapat pula 2 system tract yaitu : Highstand System Tract (HST) dan Transgresive System Tract (TST). Hasil interpretasi seismik, terlihat adanya pola terminasi refleksi berupa onlap pada tubuh batugamping (carbonate build-up) yang berpola mounded, pola chaotic sampai free reflection dan high continuity back-self. iii

G Gemala Field, Block Tuban located at East Java basin whereas the area of the carbonate development at Tuban Formation which attained the age of Late Oligocene – Late Miocene. Gemala Field has 2 wells i.e. SKW-1 and SKW-2 which have data core, well log, and 3D Seismic to be used for determining the facies lithology as well as the sedimentation and facies distribution in lateral manner by using the sequence stratigraphy method. Based on the analysis of the core at the SKW-2 well, by the depth of 6810.0’-6929.0’ (MD), it is found 3 main facies lithology contained of Packestone facies, Bindstone fasies, and Wackestone facies which in accordance to the rocks characteristics and fossil contents and its minerals, they are included into the carbonate reef buid-up system. The formed facies sedimentation is included in the carbonate platform zone which consisted of Open Marine Shelf facies, Platform Margin Organic Reef facies, and Platform Foreslope facies. The result of the log interpretation shown that there is a marker like flooding surface which can be devided into 2 parasequence set, i.e. parasequence 1 which is bounded by marker FS1-FS2 and parasequence 2 which is bounded by marker FS2-FS3. There also found 2 system tracts i.e. Highstand System Tract (HST) and Transgresive System Tract (TST). The result of the seismic interpretation, it is shown the pattern of reflection termination like onlap on the carbonate build-up with mounded pattern, chaotic pattern until free reflection and high continuity back-self.

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