IDENTIFIKASI PROSPEK SEBARAN COAL BED METHANE (CBM)
MENGGUNAKAN METODE INVERSI ACOUSTIC IMPEDANCE PADA
FORMASI TARAKAN DI AREA “PDS†CEKUNGAN TARAKAN
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Institusion
Universitas Sriwijaya
Author
NI LUH KARMILA SARI (STUDENT ID : 08021181621064)
Sutopo Sutopo (LECTURER ID : 0017117101)
Azhar Kholiq Affandi (LECTURER ID : 0015096101)
Sutopo Sutopo (LECTURER ID : 0017117101)
Azhar Kholiq Affandi (LECTURER ID : 0015096101)
Subject
QC801-809 Geophysics. Cosmic physics
Datestamp
2020-07-29 04:49:44
Abstract :
Tarakan Formation at the Tarakan Sub-basin as a part of the Tarakan Basin is the target area of this study. The Tarakan Formation is composed of sandstones, flakes and coal. In this case, coal is a source rock and also a reservoir of Coal Bed Methane (CBM). This research uses 3D PSTM (Post-Stack Time Migration) seismic data and 1 well (NI well) data. To identify the prospect of CBM distribution, the seismic inversion method has conducted using a model-based type of acoustic impedance inversion. This modelbased inversion uses a soft constraint technique with a high correlation between synthetic seismogram and actual seismic in rate number 0,97312 and an error rate 0,236786. The inversion produces an acoustic impedance distribution map showing possibility of the coal reservoir distribution prospect from CBM in the target zone. The inversion results show that the coal reservoir is at a low acoustic impedance to its surroundings, ranging from 2100-5900 (m/s)*)(g/cc) around the NI well in the target zone located at 190 ms below the Tarakan Formation. Keyword: Coal Bed Methane, seismic inversion, acoustic impedance, model-based inversion, Tarakan Basin.
Tarakan Formation at the Tarakan Sub-basin as a part of the Tarakan Basin is the target area of this study. The Tarakan Formation is composed of sandstones, flakes and coal. In this case, coal is a source rock and also a reservoir of Coal Bed Methane (CBM). This research uses 3D PSTM (Post-Stack Time Migration) seismic data and 1 well (NI well) data. To identify the prospect of CBM distribution, the seismic inversion method has conducted using a model-based type of acoustic impedance inversion. This modelbased inversion uses a soft constraint technique with a high correlation between synthetic seismogram and actual seismic in rate number 0,97312 and an error rate 0,236786. The inversion produces an acoustic impedance distribution map showing possibility of the coal reservoir distribution prospect from CBM in the target zone. The inversion results show that the coal reservoir is at a low acoustic impedance to its surroundings, ranging from 2100-5900 (m/s)*)(g/cc) around the NI well in the target zone located at 190 ms below the Tarakan Formation. Keyword: Coal Bed Methane, seismic inversion, acoustic impedance, model-based inversion, Tarakan Basin.
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RAMA_45201_08021181621064_TURNITIN.pdf
RAMA_45201_08021181621064_0017117101_0015096101_01_front_ref.pdf
RAMA_45201_08021181621064_0017117101_0015096101_02.pdf
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RAMA_45201_08021181621064_0017117101_0015096101_05.pdf
RAMA_45201_08021181621064_0017117101_0015096101_06_ref.pdf
RAMA_45201_08021181621064_0017117101_0015096101_07_lamp.pdf
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