STUDI IDENTIFIKASI PERANGKAP HIDROKARBON PALEOGEN - NEOGEN DI PERAIRAN WOKAM ARU UTARA, PAPUA BARAT: DATA UTAMA HASIL SURVEI GEOMARIN III

Priatin Hadi Wijaya, Deny Setiady, Jusfarida Jusfarida, R. Wibowo


Abstract


ABSTRAK

Perairan Wokam Aru Utara, Papua Barat merupakan bagian tepi utara passive margin Mesozoik Arafura – Australia. Hasil survei dengan KR. Geomarin III di perairan Wokam 2014 diperoleh lintasan seismik Multi Kanal 1.182 km, dan pemeruman batimetri/sub bottom profiles (SBP) 1.510 km. Metode dilakukan interpretasi penampang seismik hasil survei, pengikatan sumur pemboran dan seismik, analisis petrofisika dan pemetaaan geologi bawah permukaan. Pada penampang seismik telah dilakukan interpretasi aspek struktur geologi dan perlapisan sedimen yang sebelumnya telah diikat dengan data sumur ASA-1X, ASM-1X dan ASB-1X untuk tiga horizon yaitu Top Neogen, Top Paleogen dan Base Paleogen

Peta bawah permukaan Paleogen – Neogen menunjukan beberapa klosur yang berpotensi di bagian batas paparan dengan palung Aru serta bagian barat. Pada bagian Tenggara terdapat kenampakan onlapping sedimentasi Tipe struktural yang berkembang sebagai perangkap secara dominan berupa graben – half graben dan tilted faul. Onlaping sedimentasi yang mebaji juga dapat berpotensi.Struktur geologi pada area penelitian secara umum dikontrol oleh sesar utama Zona Sesar Palung Aru Utara di tepian paparan sampai lereng, mengarah utara - timur laut ke selatan - barat daya. Struktur ikutan yaitu sesar-sesar normal mengarah utara - timur laut ke selatan - barat daya di paparan sebelah timur zonar sesar utama.

Studi awal potensi migas ini teridentifikasi empat lokasi potensi perangkap hidrokarbon dari umur Paleogen - Neogen, yaitu satu lokasi dari Peta Base Paleogen, dua lokasi Top Paleogen dan satu lokasi Top Neogen.

 

kata kunci: Wokam, Aru, migas, seismik, struktur, interpretasi, jebakan, Geomarin III

 

ABSTRACT

The waters of Wokam North Aru, West Papua are part of the northern edge of the Mesozoic passive margin of Arafura - Australia. Survey results with KR. Geomarin III in the waters of Wokam 2014 obtained a multi-channel seismic trajectory of 1,182 km, and bathymarism/sub bottom profiles (SBP) 1,510 km. The method is to interpret the seismic cross-section of the survey results, tie drilling and seismic wells, petrophysical analysis and mapping the subsurface geology. In the seismic section, an interpretation of the structural aspects of the geology and sediment layers has been carried out previously tied to data from the ASA-1X, ASM-1X and ASB-1X wells for three horizons, namely Top Neogen, Top Paleogene and Base Paleogene.

The subsurface map of the Paleogene - Neogeneous surface shows several potential closures in the exposure boundary with the Aru Trench as well as the western part. In the Southeast, there is the appearance of sedimentation onlapping. Structural types that develop as traps are predominantly graben - half graben and tilted fault. The onlaping sedimentation also has potential. The geological structure in the study area is generally controlled by the main fault of the North Aru Trench Zone on the edge of the exposure to the slope, heading north - northeast to south - southwest. Follow-up structures are normal faults pointing north - northeast to south - southwest on the eastern exposure of the main fault zone.

This preliminary study of oil and gas potential identified four potential locations for hydrocarbon traps from the Paleogene - Neogene age, namely one location from the Paleogene Base Map, two Top Paleogene locations and one Top Neogen location.

Keyword: Wokam, Aru, oil and gas, seismic, structure, interpretation, traps, Geomarin III


Keywords


Wokam, Aru, oil and gas, seismic, structure, interpretation, traps, Geomarin III

Full Text:

PDF

References


Aldha, T dan Ho, K.J., 2008, Tertiary Hydrocarbon Play in NW Arafura Shelf, Offshore South Papua: Frontier Area in Eastern Indonesia, Proceeding IPA 32nd Annual Convention & Exhibtion, Jakarta

Balitbang ESDM, 2013, Hand-out Presentasi Forum Group Discussion Sektor Migas untuk Kawasan Timur Indonesia, Jakarta

Casarta, L.J., Salo, J.P., Tisnawidjaja, S., and Sampurno, S.T., 2004. Wiriagar Deep: the Frontier Discovery that Triggered Tangguh LNG: Proceedings of the Indonesian Petroleum Association, 21 p.

Decker, J., Bergman, S.C., Teas, P.A., Baillie, P., Orange, D.L., 2009, Constraints On The Tectonic Evolution Of The Bird’s Head, West Papua, Indonesia, Proceedings, Indonesia Petroleum Association, Thirty-Third Ipa Annual Convention & Exhibition, 2009

Ditjen Migas, 2011, Hand-out Presentasi, Hasil Joint Studi di Blok Aru Utara Papua, Jakarta

Ditjen Migas, 2009, Hand-out makalah: Rencana dan Prospek Penawaran Wilayah Kerja Migas, Jakarta

Ditjen Migas. 2003. Kebijakan dan Program Subsektor Migas dalam Mempercepat Pembangunan Kawasan Timur Indonesia. Forum Litbang ESDM. Jakarta

Folk, R.L., 1980, Petrology of Sedimentary Rocks. Hemphill Publishing Company, Austin, Texas, p. 15-60.

Fraser, T.H., Bon, J., and Samuel, L., 1993. A new dynamic Mesozoic stratigraphy for the west Irian Micro-Continent Indonesia and its implications:Proceedings of the Indonesian Petroleum Association, 55 p.

Granath, J.W., Christ, J.M., Emmet, P.A. and Dinkelman, 2010, Insights into the tectonics of Eastern Indonesia from Arafuraspan, a long offset long record 2D seismic reflection dataset. Proceedings, Indonesian Petroleum Association. Thirty-Fourth Annual Convention & Exhibition, May 2010.

Keho, T., and Samsu, D., 2002, Depth Conversion of Tangguh Gas Fields: Leading Edge, p. 966-971.

Marcou, J.A., Samsu, D., Kasim, A., Meizarwin, and Davis, N. 2004. Tangguh LNG’s Gas Resource: Discovery, Appraisal and Certification: Proceedings of the Indonesian Petroleum Association, 18 p.

Noble, R., Orange, D., Decker, J., Teas, P. And Baillie, P., 2009, Oil and gas seeps in deep marine sea floor cores as indicators of active petroleum systems in Indonesia. Proceedings, Indonesia Petroleum Association, Thirty-Third IPA Annual Convention & exhibition, 2009.

Pairault, A.A., Hall, R., Elders, C.F., 2003, Structural Styles and Tectonic Evolution of the Seram Trough, Indonesia: Marine and Petroleum Geology v. 20, p. 1141–1160.

Robertson, J., 1999, Tangguh—Discovery of a Major Gas Province in Irian Jaya, Indonesia: Proceedings of the Indonesian Petroleum Association, 2 p.

Susilohadi., 1985, Perangkat Lunak Program Nomenklatur dan Parameter Statistik Sedimen, Pusat Pengembangan Geologi Kelautan, unpublished.

Talisman Energy & Ditjen Migas, 2010, North Semai Joint Study. Final Presentation. Bogor, January 10, 2011.

Vail, P. R., Mitchum, R. M., Todd, J.R., Widmer J.M., Thomson III, S., Sangree, J.B., Bubb, J.N. (1977), Seismic stratigraphy and global changes of sea level, Part 1-11, AAPG Memoir 26th, p.49-212

Wentworth, C. K., 1922, A scale of grade and class terms for clastic sediments: Journal of Geology, v. 30, p. 377-392.

Wijaya, P.H., M.Akrom Mustafa, T.P. Nainggolan, E. Usman, H.C. Widiatmoko, H. Kurnio, L. Sarmili, A. Wahib, E. Rohendi, A. Wisnu Pertala, Ai Yuningsih, B. Rachmat, Evie H. Sudjono, A. Ibrahim, N.C.D. Aryanto, G.M Hermansyah, M. Surachman, B. T. Harjanto, Penelitian Potensi Migas untuk Mendukung Penyiapan Wilayah Kerja Migas Nasional (KR. Geomarin III) Wilayah Semai-Misool Perairan Papua Barat, Sumber Daya Geologi Kelautan, Puslitbang Geologi Kelautan, Bandung, tidak dipublikasikan




DOI: http://dx.doi.org/10.32693/jgk.19.1.2021.694

Refbacks

  • There are currently no refbacks.



Terakreditasi oleh: Direktorat Jenderal Penguatan Riset dan Pengembangan, Kemenristek Dikti