JANNAH, EVI LU`LUATUL (2024) IDENTIFIKASI SISTEM MINYAK DAN GAS BUMI MENGGUNAKAN METODE FULL TENSOR GRAVITY- GRADIOMETRY MELALUI FORWARD MODELLING 2D PADA LAPANGAN “EG” DAERAH PAPUA. Other thesis, UPN Veteran Yogyakarta.
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Abstract
ABSTRAK
IDENTIFIKASI SISTEM MINYAK DAN GAS BUMI
MENGGUNAKAN METODE FULL TENSOR GRAVITY-
GRADIOMETRY MELALUI FORWARD MODELLING 2D PADA
LAPANGAN “EG” DAERAH PAPUA
Oleh:
EVI LU`LUATUL JANNAH
115200014
Papua memiliki potensi Migas terbesar di Indonesia yang dibuktikan
dengan keberadaan Cekungan besar berumur tersier seperti Cekungan Bintuni,
Salawati dan Berau. Berdasarkan penelitian yang sudah dilakukan oleh PT
Pertamina, terdapat potensi hidrokarbon di daerah Papua ditinjau dari data seismik
dan sumur pada abad ke-19. Akan tetapi, untuk persebaran datanya masih belum
merata pada seluruh daerah. Oleh karena itu, tujuan dari penelitian ini ialah untuk
memperbarui dan mendetilkan data, serta menginterpretasi daerah prospek minyak
dan gas bumi baru melalui survei regional pada Papua Barat. Penelitian ini
menggunakan metode Full Tensor Gravity-Gradiometry yang memiliki
sensitivitas tinggi serta daya cakupan yang luas dengan waktu operasi yang
singkat. Akuisisi Full tensor Gravity-Gradiometry dilakukan dengan total lintasan
sebanyak 187 lintasan utama dan 11 lintasan pengikat serta menghasilkan 6
komponen yaitu, Gxx,Gxy, Gyy, Gzx, Gzy, Gzz. Komponen Gxx, Gyy, dan Gxy
digunakan dalam pembuatan Peta THC untuk mengetahui respon kelengkungan
struktur geologi. Komponen Gzx dan Gzy digunakan dalam pembuatan peta THG
untuk identifikasi kelurusan struktur dan komponen Gzz untuk mengetahui respon
anomali secara keseluruhan. Pada interpretasi peta Gzz didapatkan point of
interest daerah penelitian terdapat nilai anomali rendah berkisar -24,3 hingga 4,9
Eotvos yang diasumsikan sebagai keterdapatan low basement. Selain itu,
berdasarkan interpretasi semua peta, daerah penelitian memiliki arah umum
struktur yang berorientasi tenggara-baratlaut. Struktur ini diinterpretasikan
membentuk flower structure positif dengan pergerakan mendatar kiri berdasarkan
respon grafik model, yang divalidasi oleh data sumur dan penampang seismik 2D.
Pada forward modelling juga dilakukan interpretasi awal terkait keberadaan
petroleum system daerah penelitian yang memiliki source rock berupa batuan
yang berasal dari Formasi Kemblangan, reservoir berupa batuan gamping pada
Formasi Kais, dan seal rock berupada lempung dan lanau pada Formasi Klasafet.
Kata Kunci: Full Tensor Gravity-Gradiometry, Forward Modelling, Petroleum
System
ABSTRACT
IDENTIFICATION OF PETROLEUM SYSTEMS USING FULL
TENSOR GRAVITY-GRADIOMETRY METHOD THROUGH 2 D
FORWARD MODELING IN THE “EG” FIELD IN THE PAPUA
REGION
By:
EVI LU`LUATUL JANNAH
115200014
Papua has the largest oil and gas potential in Indonesia as evidenced by
the existence of large tertiary age basins such as the Bintuni, Salawati and Berau
Basins. Based on research conducted by PT Pertamina, there is hydrocarbon
potential in the Papua region based on seismic and well data from the 19th
century. However, the distribution of data is still uneven in all regions. Therefore,
the purpose of this study is to update and detail the data, and interpret new oil
and gas prospect areas through regional surveys in West Papua. This research
uses the Full Tensor Gravity-Gradiometry method which has high sensitivity and
wide coverage with short operating time. Full tensor Gravity-Gradiometry
acquisition was carried out with a total of 187 main trajectories and 11 tie
trajectories and produced 6 components namely, Gxx, Gxy, Gyy, Gzx, Gzy, Gzz.
The Gxx, Gyy, and Gxy components were used in the creation of the THC Map to
determine the curvature response of the geological structure. The Gzx and Gzy
components are used in the creation of THG maps to identify the straightness of
the structure and the Gzz component to determine the overall anomaly response.
In the interpretation of the Gzz map, it is found that the point of interest of the
research area has a low anomaly value ranging from -24.3 to 4.9 Eotvos which is
assumed to be the presence of low basement. In addition, based on the
interpretation of all maps, the study area has a general direction of the
structureoriented southeast-northwest. This structure is interpreted to form a
positive flower structure with left horizontal movement based on the response of
the model graph, which is validated by well data and 2D seismic cross sections. In
the forward modeling, an initial interpretation was also carried out regarding the
existence of a petroleum system in the study area that has source rock in the form
of rocks originating from the Kemblangan Formation, reservoir in the form of
limestone in the Kais Formation, and seal rock in the form of clay and silt in the
Klasafet Formation.
Keywords: Full Tensor Gravity-Gradiometry, Forward Modelling, Petroleum
System
ABSTRACT
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Full Tensor Gravity-Gradiometry, Forward Modelling, Petroleum System |
| Subjects: | Q Science > QE Geology |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 06 Jun 2024 01:58 |
| Last Modified: | 06 Jun 2024 01:58 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/39641 |
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