PEMODELAN SEISMIK FASIES PADA RESERVOIR GAS BIOGENIK: STUDI KASUS PADA LAPANGAN “TG”

ALFATIH, ISMAIL ZAKY (2017) PEMODELAN SEISMIK FASIES PADA RESERVOIR GAS BIOGENIK: STUDI KASUS PADA LAPANGAN “TG”. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Gas Biogenik merupakan gas dangkal yang terbentuk pada ekosistem lautan dangkal. Lapangan “TG” diketahui memiliki reservoir yang berisi fluida berupa gas biogenik yang terdapat pada reservoir limestone globigerina. Telah dilakukan seismik fasies modelling pada reservoir tersebut untuk mengetahui persebaran lateral dari properti dan fasiesnya. Metode yang digunakan ialah penggabungan dua kontrol, yaitu kontrol vertikal dan kontrol horizontal agar diperoleh persebaran lateral dari fasies tersebut. Kontrol vertikal berupa analisa data well untuk mengetahui jenis batuan yang ada dan melakukan pengklasifikasian berdasarkan log sonic dan densitas. Kontrol horizontal berupa grid model seismik dan seismik atribut Instantaneous Frequency. Pemodelan fasies secara 3D diperoleh kesesuaian data antara model dan kolom litostratigrafi bahwa keberadaan limestone berada pada kedalaman 901-949 meter pada sumur TG-1 dan 930-993 meter pada sumur TG-2. Data fasies diklasifikasikan menjadi 4, yaitu Super Sandy Globigerina sebagai limestone berpori tinggi sebagai reservoir, Sandy Globigerina sebagai limestone yang didominasi oleh sand, Shaly Globigerina sebagai limestone yang didominasi oleh shale serta Compact Globigerina merupakan limestone kompak tanpa pori. Kata Kunci : Seismik, Well Log, Gas Biogenik, Limestone, Fasies, Properti, 3D Model, Globigerina, Reservoir ================================================================================================================== Biogenic gas is a shallow gas that is formed on the shallow marine ecosystems. “TG” Field is known to have a globigerina limestone reservoir that containing biogenic gas fluid. Therefore, it is necessary to do seismic facies modelling in the reservoir to determine the lateral distribution of its property and its facies. The method used two controls, vertical control and horizontal control to obtain lateral distribution of the facies. Well log data analysis based on sonic and density log to determine the type of the rock as a vertical control. Seismic grid model and seismic attribute Instantaneous Frequency as a horizontal control. 3D facies modelling acquired data consistency between models and litostratigraphy column. The presence of limestone is at depth 901-949 meters on TG-1 wells and 930-993 meters in TG-2 wells. Data facies are classified into four, namely Super Sandy Globigerina as high as porous limestone reservoir, Sandy Globigerina as limestone dominated by sand, Shaly Globigerina as limestone dominated by shale and limestone Compact is a compact Globigerina without pore. Keyword : Seismic, Well Log, Biogenic Gas, Limestone, Facies, Property, 3D Model, Globigerina, Reservoir

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Seismik, Well Log, Gas Biogenik, Limestone, Fasies, Properti, 3D Model, Globigerina, Reservoir
Subjects: Q Science
Q Science > QE Geology
Q Science > QE Geology > QE601 Geology, Structural
T Technology > TN Mining engineering. Metallurgy
Divisions: Faculty of Civil Engineering and Planning > Geophysics Engineering > (S1) Undergraduate Theses
Depositing User: - ISMAIL ZAKY AL FATIH
Date Deposited: 26 Jan 2017 01:35
Last Modified: 26 Jan 2017 01:35
URI: http://repository.its.ac.id/id/eprint/3423

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