APLIKASI METODE SWEETNESS DAN SPECTRAL DECOMPOSITION UNTUK IDENTIFIKASI AWAL POTENSI HIDROKARBON DI PERAIRAN UTARA BALI

Shaska Ramadhan Zulivandama, G.M. Hermansyah, Egie Wijaksono


Abstract


Semakin menipisnya cadangan minyak dan gas bumi di Indonesia mendorong kita untuk terus melakukan kegiatan eksplorasi minyak dan gas bumi. Tujuan penelitian ini ialah untuk mengidentifikasi hidrokarbon di Perairan Utara Bali sehingga bisa menambah data sumberdaya minyak dan gas bumi yang dimiliki Indonesia. Hubungan antara frekuensi dengan batuan yang tersaturasi fluida dapat mengindikasikan keberadaan hidrokarbon. Metode sweetness dan spectral decomposition merupakan metode yang memanfaatkan analisis pada domain frekuensi dan tidak bergantung kepada panjang offset lintasan sesimik yang merupakan permasalahan utama saat melakukan akuisisi data seismik di laut. Hasil penelitian ini menunjukkan metode atribut sweetness dapat mengidentifikasi keberadaan hidrokarbon memiliki nilai sebesar 1600 – 2200 dimana nilai ini sangat bergantung dengan nilai amplitudo dan frekuensi pada daerah penelitian. Sementara itu keberadaan potensi hidrokarbon pada metode spectral decomposition ditunjukkan oleh nilai frekuensi 30 Hz. Baik metode atribut sweetness ataupun spectral decomposition dapat mengidentifikasi keberadaan hidrokarbon di Perairan Utara Bali.
Kata kunci: Seismik, Sweetness, Spectral Decomposition, Hidrokarbon


The decreasing of oil and gas reserves in Indonesia impelling us to expand our oil and gas exploration activities. This study was conducted to identify hydrocarbon in the North Waters of Bali so Indonesian oil and gas resources will be augmented. The relationship between frequency and fluid saturated rocks can indicate the presence of hydrocarbon . Sweetness and spectral decomposition is a frequency domain based method and does not depend on the length of offset of the seismic trajectory which is a major problem when acquiring seismic data at sea. The results of this study show that the attribute method of sweetness can identify the presence of hydrocarbons at ranged values between 1600 – 2200, these values depend on the value of amplitude and frequency of the research area. On the other hand, potential of the presence of hydrocarbon identified by the spectral decomposition method is indicated by certain frequency (30 Hz). So from our results both attribute, sweetness and spectral decomposition can identify the presence of hydrocarbons in the North Bali’s Sea.
Keywords: Seismic, Sweetness, Spectral Decomposition, Hydrocarbon


Keywords


Seismik;Sweetness;Spectral Decomposition;Hidrokarbon

References


Allen, James L., C. P. Peddy, and Timothy L. Fasnacht. 1993. “Some AVO Failures and What (We Think) We Have Learned.” The Leading Edge 12 (3): 162–67.

Bassiouni, Zaki, 1994, Theory, Measurement, and Interpretation of Well Logs; SPE Textbook Series Vol. 4: Society of Petroleum Engineers, Richardson, Texas.

Castagna, J. P., Sun, S. and Siegfried, R. W., 2003. Instantaneous spectral analysis: Detection of low frequency shadows associated with hydrocarbons, The Leading Edge, 22, no.2, 120-127.

Dewan, J.T.: Essentials of Modern Openhole Log Interpretation, Pennwell Publishing, Ok (1983)

Doust, Harry, and Ron A. Noble. 2008. “Petroleum Systems of Indonesia.” Marine and Petroleum Geology 25 (2): 103–29.

Goloshubin, Gennady, Connie VanSchuyver, Valeri Korneev, Dmitry Silin, and Vjacheslav Vingalov. 2006. “Reservoir Imaging Using Low Frequencies of Seismic Reflections.” The Leading Edge 25 (5): 527–31.

Koson, Sanhasuk, Piyaphong Chenrai, and Montri Choowong. 2014. “Bulletin of Earth Sciences of Thailand Seismic Attributes and Their Applications in Seismic Geomorphology” 6 (1): 1–9.

Mudjiono, R. dan Pireno, G. E. 2002. Exploration Of The North Madura Platform,Offshore East Java, Indonesia. 28th Annual Convention Proceeding, Indonesian Petroleum Association.

Munadi Suprajitno, Humbang Purba and Rosie A.S. 2012. "Differenciating Oil. Gas and Water in Seismic Section Using Spectral Decomposition."Scientific Contribution Oil & Gas 35 : 83-90.

Naseer, M.T., and S. Asim. 2017. “Detection of Cretaceous Incised-Valley Shale for Resource Play, Miano Gas Field, SW Pakistan: Spectral Decomposition Using Continuous Wavelet Transform.” Journal of Asian Earth Sciences 147 (August 2016).

Partyka, G., Gridley, J., Lopez, J., 1999, Interpretation Application of Spectral Decomposition in Reservoir Charecterization, The Leading Edge.

Radovich, B.J., and Oliveros, R.B., 1998. 3D sequence interpretation of seismic instantaneous attributes from the Gorgon Field. The Leading Edge, v.17, 1286- 1293

Schlumberger, 1958. Log Interpretation Principles / Applications, Schlumberger

Educational Services. Houston. Texas.

Sudarmadji. 2013. “Identifikasi Reservoar Batu Pasir Tersaturasi Minyak Menggunakan Analisa Frekuensi Rendah Berbasis CWT dan AVO.” Berkala MIPA, 23: 34–42.

Realisasi survey seismik 2D di Indonesia http://statistik.migas.go.id diakses pada tanggal 22 – 08 – 2017 pukul 20.04 WIB.




DOI: http://dx.doi.org/10.32693/jgk.v16i1.401

Refbacks

  • There are currently no refbacks.



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