Studi Sikuen Stratigrafi Untuk Menentukan Fasies Pada Batupasir A Formasi Duri dan Batupasir B Formasi Bekasap Berdasarkan Data Core dan Data Log Pada Lapangan Ramadhan, Cekungan Sumatera Tengah.
DAFTAR ISI
Halaman
SARI ..................................................................................................
i
ABSTRACT ......................................................................................
ii
KATA PENGANTAR
..............................................................
iii
..........................................................................
vi
..............................................................
ix
..........................................................................
xii
DAFTAR ISI
DAFTAR GAMBAR
DAFTAR TABEL
BAB I PENDAHULUAN
..............................................................
1
1.1 Latar Belakang
..............................................................
1
1.2 Maksud dan Tujuan Penelitian
......................................
3
1.3 Batasan Penelitian ..............................................................
3
1.4 Lokasi dan Waktu Penelitian
......................................
4
1.5 Kegunaan Penelitian
......................................
5
...................................................
6
2.1 Geologi Regional Cekungan Sumatera Tengah ................
6
BAB II TINJAUAN PUSTAKA
2.1.1 Lokasi
...............................................................
6
2.1.2 Tektonik ...............................................................
7
2.1.3 Tektonostratigrafi
.......................................
10
2.1.4 Stratigrafi Regional
.......................................
14
2.1.5 Struktur Geologi...................................................
20
2.2 Geologi Regional Lapangan Ramadhan ...........................
22
2.2.1 Latar Belakang Lapangan Ramadhan ...............
22
2.2.2 Stratigrafi Lokal Daerah Penelitian
23
...............
2.2.3 Struktur Geologi Lokal Daerah Penelitian
...
25
...............................................................
26
2.3.1 Metode Well Logging .......................................
26
2.3 Landasan Teori
2.3.1.1 Konsep Dasar Well Log
...............
27
2.3.1.2 Macam-macam Jenis Log
...............
28
vi
2.3.1.3 Motif Log
.......................................
2.3.2 Sikuen Stratigrafi...................................................
2.3.2.1 Konsep dan Prinsip
............................
33
35
35
2.3.2.2 Eustasy, Relative Sea Level, dan
Water Depth .........................................
2.3.2.3 Supply Sediment
36
.............................
38
2.3.2.4 Akomodasi Sedimen .............................
39
2.3.2.5 Systems Tract .........................................
41
2.3.2.5.1 Lowstand Systems Tract
.....
41
2.3.2.5.2 Transgressive Systems Tract ..
42
2.3.2.5. 3 Highstand Systems Tract .....
42
2.3.2.6 Tipe – Tipe Sikuen
.............................
44
2.3.2.7 Permukaan Dalam Sikuen
Pengendapan .........................................
46
2.3.2.8 Parasequences & Parasequence
Sets
.....................................................
2.3.2.9 Stacking Patterns
47
.........................
47
.........................................................
50
2.3.4 Facies .........................................................
53
2.3.5 Lingkungan Pengendapan
..........................
54
....................................
54
2.3.5.1.1 Wave Dominated Estuary ..
56
2.3.5.1.2 Tide Dominted Estuary.......
56
2.3.3 Core
2.3.5.1 Estuary
BAB III METODE PENELITIAN ......................................................
59
3.1 Objek Penelitian .................................................................
59
3.2 Langkah – langkah penelitian ........................................
59
3.2.1 Tahap Persiapan dan Pengumpulan data ..............
61
3.2.2 Tahap Pengolahan Data........................................
61
3.2.2.1 Deskripsi Bantu Inti ( Core )...................
61
3.2.2.2 Analisis Litofasies dan Asosiasi
Fasies dari Data Batu Inti (core) ...........
vii
62
3.2.2.3 Analisis Data Wireline Log ...............
63
3.2.2.4 Analisis Elektrofasies dari Data
Wireline Log .......................................
64
3.2.2.5 Analisis Sikuen Stratigrafi dan
Korelasi
.......................................
65
3.2.2.6 Pembuatan Penampang Stratigrafi
Stratigrafi dan Peta Bawah
Permukaan
.......................................
68
3.2.2.7 Analisis System Tract ..........................
69
Tahap Penyusunan laporan
...........................
70
BAB IV HASIL PENELITIAN DAN PEMBAHASAN ..............
71
3.2.3
4.1 Analisis Fasies
..............................................................
71
4.1.1 Litofasies dan Analisis Data Batu Inti ..............
72
4.1.2 Deskripsi Core dan Pemerian Litofasies
..
74
4.1.3 Asosiasi Fasies ..................................................
83
4.1.4 Elektrofasies
86
.................................................
4.1.5 Model Fasies dan Kalibrasi Log
.............
87
.....................................
88
.....................................
88
4.2.2 Transgressive Surface .....................................
91
4.2.3 Maximum Flooding Surface
.........................
92
.........................................................................
93
4.2 Analisis Sikuen Stratigrafi
4.2.1 Sequence Boundary
4.3 Korelasi
4.3.1 Pembuatan Line Of Section
4.4 Penampang Stratigrafi Fasies
4.5 Peta Ketebalan Fasies
94
.....................................
98
.................................................
101
.....................................
104
.............................................................
107
4.6 Lingkungan Pengendapan
4.7 System Tract
.........................
4.8 Rekontruksi Sikuen Pengendapan
.........................
110
BAB V KESIMPULAN
............................................................
112
DAFTAR PUSTAKA
............................................................
xiii
viii
Halaman
SARI ..................................................................................................
i
ABSTRACT ......................................................................................
ii
KATA PENGANTAR
..............................................................
iii
..........................................................................
vi
..............................................................
ix
..........................................................................
xii
DAFTAR ISI
DAFTAR GAMBAR
DAFTAR TABEL
BAB I PENDAHULUAN
..............................................................
1
1.1 Latar Belakang
..............................................................
1
1.2 Maksud dan Tujuan Penelitian
......................................
3
1.3 Batasan Penelitian ..............................................................
3
1.4 Lokasi dan Waktu Penelitian
......................................
4
1.5 Kegunaan Penelitian
......................................
5
...................................................
6
2.1 Geologi Regional Cekungan Sumatera Tengah ................
6
BAB II TINJAUAN PUSTAKA
2.1.1 Lokasi
...............................................................
6
2.1.2 Tektonik ...............................................................
7
2.1.3 Tektonostratigrafi
.......................................
10
2.1.4 Stratigrafi Regional
.......................................
14
2.1.5 Struktur Geologi...................................................
20
2.2 Geologi Regional Lapangan Ramadhan ...........................
22
2.2.1 Latar Belakang Lapangan Ramadhan ...............
22
2.2.2 Stratigrafi Lokal Daerah Penelitian
23
...............
2.2.3 Struktur Geologi Lokal Daerah Penelitian
...
25
...............................................................
26
2.3.1 Metode Well Logging .......................................
26
2.3 Landasan Teori
2.3.1.1 Konsep Dasar Well Log
...............
27
2.3.1.2 Macam-macam Jenis Log
...............
28
vi
2.3.1.3 Motif Log
.......................................
2.3.2 Sikuen Stratigrafi...................................................
2.3.2.1 Konsep dan Prinsip
............................
33
35
35
2.3.2.2 Eustasy, Relative Sea Level, dan
Water Depth .........................................
2.3.2.3 Supply Sediment
36
.............................
38
2.3.2.4 Akomodasi Sedimen .............................
39
2.3.2.5 Systems Tract .........................................
41
2.3.2.5.1 Lowstand Systems Tract
.....
41
2.3.2.5.2 Transgressive Systems Tract ..
42
2.3.2.5. 3 Highstand Systems Tract .....
42
2.3.2.6 Tipe – Tipe Sikuen
.............................
44
2.3.2.7 Permukaan Dalam Sikuen
Pengendapan .........................................
46
2.3.2.8 Parasequences & Parasequence
Sets
.....................................................
2.3.2.9 Stacking Patterns
47
.........................
47
.........................................................
50
2.3.4 Facies .........................................................
53
2.3.5 Lingkungan Pengendapan
..........................
54
....................................
54
2.3.5.1.1 Wave Dominated Estuary ..
56
2.3.5.1.2 Tide Dominted Estuary.......
56
2.3.3 Core
2.3.5.1 Estuary
BAB III METODE PENELITIAN ......................................................
59
3.1 Objek Penelitian .................................................................
59
3.2 Langkah – langkah penelitian ........................................
59
3.2.1 Tahap Persiapan dan Pengumpulan data ..............
61
3.2.2 Tahap Pengolahan Data........................................
61
3.2.2.1 Deskripsi Bantu Inti ( Core )...................
61
3.2.2.2 Analisis Litofasies dan Asosiasi
Fasies dari Data Batu Inti (core) ...........
vii
62
3.2.2.3 Analisis Data Wireline Log ...............
63
3.2.2.4 Analisis Elektrofasies dari Data
Wireline Log .......................................
64
3.2.2.5 Analisis Sikuen Stratigrafi dan
Korelasi
.......................................
65
3.2.2.6 Pembuatan Penampang Stratigrafi
Stratigrafi dan Peta Bawah
Permukaan
.......................................
68
3.2.2.7 Analisis System Tract ..........................
69
Tahap Penyusunan laporan
...........................
70
BAB IV HASIL PENELITIAN DAN PEMBAHASAN ..............
71
3.2.3
4.1 Analisis Fasies
..............................................................
71
4.1.1 Litofasies dan Analisis Data Batu Inti ..............
72
4.1.2 Deskripsi Core dan Pemerian Litofasies
..
74
4.1.3 Asosiasi Fasies ..................................................
83
4.1.4 Elektrofasies
86
.................................................
4.1.5 Model Fasies dan Kalibrasi Log
.............
87
.....................................
88
.....................................
88
4.2.2 Transgressive Surface .....................................
91
4.2.3 Maximum Flooding Surface
.........................
92
.........................................................................
93
4.2 Analisis Sikuen Stratigrafi
4.2.1 Sequence Boundary
4.3 Korelasi
4.3.1 Pembuatan Line Of Section
4.4 Penampang Stratigrafi Fasies
4.5 Peta Ketebalan Fasies
94
.....................................
98
.................................................
101
.....................................
104
.............................................................
107
4.6 Lingkungan Pengendapan
4.7 System Tract
.........................
4.8 Rekontruksi Sikuen Pengendapan
.........................
110
BAB V KESIMPULAN
............................................................
112
DAFTAR PUSTAKA
............................................................
xiii
viii