BIOSTRATIGRAPHY ANALYSIS OF BARBATOS-1 EXPLORATION WELL IN TOMORI BLOCK, BANGGAI BASIN, EAST ARM OF SULAWESI

Anis Kurniasih; Ennur Kusumawijaya; Ferdy Ferdy; Fahrudin Fahrudin; Reddy Setyawan

doi:10.14203/risetgeotam2021.v31.1150

BIOSTRATIGRAPHY ANALYSIS OF BARBATOS-1 EXPLORATION WELL IN TOMORI BLOCK, BANGGAI BASIN, EAST ARM OF SULAWESI

Anis Kurniasih, Ennur Kusumawijaya, Ferdy Ferdy, Fahrudin Fahrudin, Reddy Setyawan

Abstract

A biostratigraphic analysis was carried out on 60 samples taken from the Barbatos-1 Well, located within the Tomori Block, Banggai Tertiary Basin, East Arm of Sulawesi. The Barbatos-1 well was selected for this study because it is composed of rock sequences which are the main reservoir in the Tomori Block. Biostratigraphic analysis was conducted to determine the relative age and depositional environment of the sample. The age of the sample is determined based on the interval zone. The depositional environment is estimated based
on the ratio of plankton (P/B ratio) and fossil facies. The results revealed that the rock formations studied were deposited in the Miocene to Holocene age. The lowest layer is the Orbulina bilobata-Zone which was deposited at N10 – N12 (lower Middle Miocene) in the bathyal environment. The layer above is a biozonation of Globorotalia menardii, deposited at N12 – N14 (upper Middle Miocene) in a neritic environment. The next layer is the biozonation of Sphaeroidinella subdehiscens – Globigerina praebulloides which was
deposited at N14 – N17 (Middle Miocene – Late Miocene) in the bathyal environment. The topmost layer is the biozonation of Orbulina universa – Globigerinoides immaturus which was deposited at N17 –
N23 or Pliocene – Holocene in the bathyal environment. In the top two layers, there are fossil fragments that come from older rock layers (Early Tertiary).

Keywords

Biostratigraphy, Foraminifera, Banggai Basin

Full Text:

PDF

References

Armstrong, H.A. dan Brasier, M.D., 2005. Microfossils 2nd Edition, Blackwell Publishing, Australia. 273 – 277.

Blow, W.H., 1969. Late Middle Eocene to Recent planktonik foraminiferal biostratigraphy, 1st International Conference of Planktonik Microfossils Proceedings. 199 – 421.

Davies, I.C., 1990. Geological and exploration review of the Tomori PSC, Easteran Indonesia, Indonesian Petroleum Association 19th Annual Convention Proceedings. 41 – 67.

Ferdian, F., Hall, R., Watkinson, I., 2010. A structural re-evaluation of The North Banggai-Sula Area, eastern Indonesia, Proceedings Indonesian Petroleum Association 34th Annual Convention and Exhibition.

Final well report Barbatos-1, 2014. JOB Pertamina-Medco Tomori E&P Sulawesi. Tidak dipublikasikan.

Final report Barbatos-1, 2018. Pekerjaan Analisa Laboratorium Post-drill Barbatos-1, LPPM UNDIP- JOB Pertamina-Medco Tomori E&P Sulawesi. Tidak dipublikasikan.

Garrard, R.A., Supandjono, J.B., Surono, 1988. The geology of The Banggai-Sula Microcontinent, Eastern Indonesia, Proceedings Indonesian Petroleum Association 17th Annual Convention. 23 – 52.

Gibson, T.G., 1989. Planktonik benthonic foraminiferal ratios: modern patterns and Tertiary applicability, Marine Micropaleontology vol. 15 no. 1-2. 29 – 52.

Hamilton, W., 1979. Tectonics of the Indonesia Region, United States Government Printing Office, Washington. 173 – 174.

Hasanusi, D., Abimanyu, R., Artono, E., dan Baasir, A.,2004. Prominent Senoro Gas Field discovery in Central Sulawesi, Proceedings Deepwater and Frontier Exploration in Asia and Australia Symposium.

Hasanusi, D., Sumarianto, J., Wijaya, R., Hendrian, D., 2015. The Tiaka-Tiara fault bend fold structures and its implication to control hydrocarbon entrapment within fracture carbonate reservoir in the Eastern Arm of Sulawesi, Indonesia, Proceedings AAPG/SEG International Conference & Exhibition 2015.

Hasibuan, F. dan Kurworo, A., 2008. Umur Formasi Nambo di Sulawesi Tengah dengan acuan khusus fosil Moluska, Jurnal Geologi dan Sumberdaya Mineral vol. XVIII no.1. 43 – 54.

Komisi Sandi Stratigrafi Indonesia, 1996. Sandi Stratigrafi Indonesia Edisi 1996 (revisi SSI 1973), Ikatan Ahli Geologi Indonesia. 25 – 27.

Loebligh, A.R., dan Tappan, H.N., 1988. Foraminiferal genera and their classification. New York. Springer.

Mann, P., Gahagan, L., Gordon, M.B., 2003. Tectonic setting of the world’s giant oil and gas fields, in M.T. Halbouty, ed., Giant oil and gas fields of the decade 1990 – 1999, AAPG Memoir 78. 15 – 105.

Maryunani, K.A., 1998. Pola sebaran foraminifera dalam hubungannya dengan stratigrafi sikuen (Studi kasus: Daerah Blora dan sekitarnya/daerah lintang rendah), Proceedings ITB vol. 30 no. 3. 1-16.

Morkhoven, F.P.C.M., Berggren, W.A., Edward, S.A., 1986. Cenozoic cosmopolitan deep-water benthic foraminifera. Pau. Elf-Aquitaine.

Murray, J.W., 1976. A method of determining proximity of marginal seas to an ocean, Marine Geology 22. 103 – 119.

Natsir, S.M., Dewi, K.T., dan Ardhyastuti, S., 2017. Keterkaitan foraminifera dan kedalaman perairan sebelah tenggara Pulau Seram, Maluku, Jurnal Geologi Kelautan vol. 15 no. 2. 73 – 80.

Postuma, J.A., 1971. Manual of Planktonik Foraminifera, Elsevier Publishing Company, Amsterdam.

Satyana, A.H., Armandita, C., Tarigan, R.L., 2008. Collision and post-collision tectonics in Indonesia: Roles for basin formation and petroleum systems, Proceedings Indonesian Petroleum Association 34th Annual Convention and Exhibtion.

Simandjuntak, T.O, 1986. Sedimentology and tectonics of the collision complex in The East Arm of Sulawesi, Indonesia, Thesis submitted for Degree of Ph.D at Royal Holloway and Bedford New College, University of London. 338 – 340

Simmons, M., 2019, Biostratigraphy in Exploration – Exploration Handbook, Halliburton Landmark, London.

DOI: http://dx.doi.org/10.14203/risetgeotam2021.v31.1150