CAHYANI, CHATERINE OLIVIA (2024) GEOLOGI DAN SEBARAN BATUPASIR “ZONA X, Y dan Z”, FORMASI AIR BENAKAT, LAPANGAN “CH”, CEKUNGAN SUMATRA SELATAN BERDASARKAN DATA SUMUR DAN SEISMIK. Other thesis, UPN Veteran Yogyakarta.
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Abstract
v
ABSTRAK
Cekungan Sumatra Selatan merupakan peringkat kedua untuk produksi
hidrokarbon di Indonesia setelah Cekungan Kutai dihitung dari total produksinya
(Syamsuddin, et al., 2009). Cekungan Sumatra Selatan tersusun atas beberapa formasi,
salah satunya adalah Formasi Air Benakat. Formasi Air Benakat dicirikan dengan
litologi berupa batuan sedimen klastik yakni batupasir yang merupakan batuan
reservoar. Salah satu upaya untuk mengetahui persebaran batupasir yang memiliki
peran sebagai batuan reservoar adalah perlu adanya analisis bawah permukaan untuk
mengkaji kembali fasies dan lingkungan pengendapan yang berkembang.
Dalam penelitian ini, terdapat tiga metode yang digunakan. Secara garis besar
metode tersebut tersebut antara lain analisis sumuran kualitatif menggunakan data core,
data mudlog dan wireline log, kemudian analisis integrasi data sumur dan seismik 2D,
serta melakukan persebaran fasies batuan reservoar secara dua dimensi.
Terdapat tiga litologi yang diidentifikasi menggunakan data wireline log,
mudlog, dan data core yaitu berupa batupasir, serpih, dan batubara. Fasies lingkungan
pengendapan pada daerah penelitian diidentifikasi masuk kedalam fasies distributary
channel, interdistributary bays, dan creavasse splay yang termasuk kedalam
lingkungan pengendapan lower delta plain yang sudah dipengaruhi oleh proses pasang
surut. Terdapat tiga batas marker pada daerah penelitian yaitu sequence boundary,
transgressive surface, dan maximum flooding surface. Berdasarkan hasil interpretasi
pada daerah penelitian arah pengendapan material sedimen relatif baratlaut – tenggara.
Terdapat tiga zona reservoar batupasir yang diinterpretasikan diendapkan pada fasies
distributary channel.
Kata Kunci : Cekungan Sumatra Selatan, Distributary Channel, Fasies ,Formasi Air
Benakat, Lower Delta Plain
vi
ABSTRACT
The South Sumatra Basin is ranked second for hydrocarbon production in
Indonesia after the Kutai Basin, calculated from its total production (Syamsuddin, et
al., 2009). The South Sumatra Basin is composed of several formations, one of which
is the Air Benakat Formation. The Air Benakat Formation is characterized by lithology
in the form of clastic sedimentary rock, namely sandstone, which is a reservoir rock.
One effort to determine the distribution of sandstone which has a role as reservoir rock
is the need for subsurface analysis to review the facies and depositional environment
that developed.
In this research, three methods were used. In general, these methods include
qualitative well analysis using core data, mudlog and wireline log data, then integrated
analysis of well and 2D seismic data, as well as carrying out the distribution of
reservoir rock facies in two dimensions.
There are three lithologies identified using wireline log, mudlog and core data,
namely sandstone, shale and coal. The depositional environmental facies in the study
area were identified as belonging to the distributary channel, interdistributary bays,
and crevasse splay facies which are included in the lower delta plain depositional
environment which has been influenced by tidal processes. There are three marker
boundaries in the research area, namely sequence boundary, transgressive surface,
and maximum flooding surface. Based on the interpretation results in the research
area, the direction of deposition of sedimentary material is relatively northwest -
southeast. There are three sandstone reservoir zones which are interpreted to be
deposited in the distributary channel facies.
Keywords: South Sumatra Basin, Distributary Channel, Facies, Air Benakat
Formation, Lower Delta Plain
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | South Sumatra Basin, Distributary Channel, Facies, Air Benakat Formation, Lower Delta Plain |
| Subjects: | Q Science > QE Geology |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 08 Jul 2024 04:55 |
| Last Modified: | 08 Jul 2024 04:55 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/40178 |
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