Path: Top > Member > diniartia@yahoo.com

IDENTIFIKASI, KARAKTERISASI, DAN ESTIMASI VOLUMETRIK RESERVOIR DELTAIK PADA LOWER MAIN ZONE LAPANGAN GAS UTARI, CEKUNGAN KUTAI, KALIMANTAN TIMUR

Identification, Characterization and Volumetric Estimation of Deltaic Reservoir on Lower Main Zone Utari Gas Field, Kutai Basin, East Kalimantan

Undergraduate Theses from JBPTITBPP / 2018-07-12 14:50:04
Oleh : Fachreza Noor Radhityatama, S1 - Geological Engineering-FITB
Dibuat : 2017-07-12, dengan 8 file

Keyword : Cekungan Kutai, Eksplorasi, Lower Main Zone, Interpretasi Seismik, Deltaik, Analisis Source Rock, Estimasi Volumetrik

Cekungan Kutai merupakan salah satu cekungan penghasil hidrokarbon terbesar di
Indonesia, dengan area sekitar 60.000 km2 dan terisi oleh endapan sedimen Tersier setebal 14
km. Salah satu lapangan pada Cekungan Kutai adalah Lapangan Utari yang merupakan
lapangan penghasil gas terbesar di Indonesia, yang terletak di median axis dari Delta
Mahakam. Lapangan Utari memiliki sumbu antiklin berarah NE-SW, yang membentuk
perangkap struktural serta stratigrafi. Pada umumnya, reservoir pada lapangan ini berupa
endapan deltaik yang berupa channel serta bar.
Studi ini ditujukan untuk mengidentifikasi reservoir pada zona Lower Main Zone
(N15-N14) yang berada pada sistem petroleum deltaik bagian bawah sebagai upaya
eksplorasi lanjutan di Lapangan Utari. Eksplorasi ini dilakukan dengan menggunakan data
seismik serta sumur eksplorasi pada daerah Central dan North-West. Hasil identifikasi
geometri menggunakan amplitudo seismik menunjukkan bahwa terdapat 2 jenis badan
sedimen pada daerah ini, yaitu distributary channel dan mouth bar.
Berdasarkan analisis data dari sumur eksplorasi, didapatkan bahwa terdapat potensi
batuan induk yang matang (Tmax ~440o & VR ~0,9%) dengan kerogen campuran tipe II serta
tipe III. Selain itu, dibuat juga peta kedalaman pada daerah penelitian yang dikorelasikan
dengan kedalaman kematangan batuan induk sehingga dapat diperkirakan daerah potential
kitchen dari reservoir ini. Setelah dianalisis, diperkirakan potential kitchen ini berada di
daerah timur dari Lapangan Utari, sehingga reservoir dapat mengalami charging dari sinklin
yang berada di daerah ini, dengan fluida diperkirakan berupa wet gas.
Untuk melakukan estimasi volumetrik pada reservoir ini, dilakukan analog
karakteristik reservoir terhadap reservoir dari sumur eksplorasi yang terletak pada fasies bar.
Analog dari reservoir ini menunjukkan beberapa karakteristik (  =0.085 & Sw=0.86), yang
kemudian dapat digunakan untuk mengasumsikan karakteristik dari reservoir tersebut ( 
=0.12 & Sw=0.42). Kemudian, karakteristik ini digunakan untuk mengestimasi volumetrik
reservoir, dengan reservoir terbesar memiliki volumetrik sekitar 12.98 BCF gas mula di
tempat.

Deskripsi Alternatif :

Kutai Basin is one of the largest hydrocarbon producing basin in Indonesia, with an
estimated area of around 60.000 km2 and filled with Tertiary sedimentary deposit around 14
km thick. Utari field is one of the fields located on Kutai Basin, and is the biggest gas field in
Indonesia. It is located on the median axis of the Mahakam Delta. Utari Field has an anticline
axis trending NE-SW, which forms a structural and stratigraphic trap for this field petroleum
system. Generally, reservoirs on this field is found as deltaic deposit such as channels and
bars.
The aim of this study is to go beyond normal targets and identify reservoir on the
Lower Main Zone (N15-N14) which is located on the lower part of the deltaic petroleum
system as an advanced exploration effort on the Utari Field. This exploration is done by using
seismic data and exploration wells on the Central and North-West area. The result of
geometry identification using seismic amplitude shows that there are 2 types of sedimentary
bodies on this study area, which are distributary channels and mouth bars.
Based on analysis of exploration well data, it is known that there is a potential mature
source rock (Tmax ~440o & VR ~0,9%) consisting of a mixed type II kerogen and type III
kerogen. Furthermore, a depth map is made on the research area which is then correlated to
the depth of source rock maturity so that the potential kitchen of this reservoir are can be
estimated. Based on the analysis, it is found that the potential kitchen area of this reservoir is
located on the eastern area of Utari Field, so the reservoir can be charged from the syncline
on this area, with an estimated fluid in form of wet gas.
To estimate the volumetric of this reservoir, a reservoir characteristic analogue is
analyzed based from the reservoirs of an exploration well located on a bar facies. This
marginal levee analogue shows several characteristics (  =0.085 & Sw=0.86), which can be
used to assume the characteristics on the channel itself (  =0.12 & Sw=0.42). Finally, these
characteristics are used to calculate the volumetric estimation of the reservoir, with the
biggest reservoir containing approximately 12.98 BCF of initial gas in place.


Copyrights : Copyright (c) 2001 by Perpustakaan Digital ITB. Verbatim copying and distribution of this entire article is permitted by author in any medium, provided this notice is preserved.

Beri Komentar ?#(0) | Bookmark

PropertiNilai Properti
ID PublisherJBPTITBPP
OrganisasiS1 - Geological Engineering-FITB
Nama KontakUPT Perpustakaan ITB
AlamatJl. Ganesha 10
KotaBandung
DaerahJawa Barat
NegaraIndonesia
Telepon62-22-2509118, 2500089
Fax62-22-2500089
E-mail Administratordigilib@lib.itb.ac.id
E-mail CKOinfo@lib.itb.ac.id

Print ...

Kontributor...

  • Dr. Ir. PRIHADI SUMINTADIREJA, MS, Editor: PKL-SMK