Multiple attenuation methods in short-offset 2D marine seismic data: a case study in Cendrawasih Bay

Yuza, N. H.; Nainggolan, Tumpal Bernhard; Manik, Henry M.

doi:10.1088/1755-1315/429/1/012031

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…True Amplitude Recovery is a process of adjusting the amplitude in order to compensate for signal attenuation [6]. Surface Wave Attenuation is the process of forming low frequency arrays to attenuate noise that comes from surface waves [7]. Deconvolution is a process of wavelet compression that aims to improve the temporal resolution of seismic recorded data.…”

Section: Data Processing Methodsmentioning

confidence: 99%

Identification of gas hydrate on bottom-simulating reflector characteristics with 2D seismic pre-stack time migration of North Bali Waters

Sufajar

Manik

Nainggolan³

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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Gas hydrate is a physical compound composed of gas molecules that are formed in a seabed layer characterised by high pressure and low temperature. It is known as one of the alternative non-conventional hydrocarbons besides petroleum and natural gas. One of the identified areas of gas hydrate stability zone is in the North Bali Waters. The North Bali Waters is part of the North East Java Basin, which has oil and gas exploration and production, both conventional and non-conventional. One method of identifying the content of gas hydrates is by looking at the appearance of the Bottom Simulating Reflector (BSR) as shown on the Pre-Stack Time Migrated seismic sections. The detection of gas hydrate zone is determined by the presence of high amplitude, reversed polarity reflection and cross-cut reflection of sedimentary layer. This study aims to determine the existence of a BSR in the waters of North Bali. The procedures for analysing the existence of Bottom Simulating Reflector in this study are pre-processing, processing, and interpretation of 2D marine seismic data. The result shows gas hydrates found with indicated Bottom Simulating Reflector on CDP 35-812 at TWT depth of 1526-1582 ms, characterised by high amplitude-reverse polarity.

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Section: Data Processing Methodsmentioning

confidence: 99%

Identification of gas hydrate on bottom-simulating reflector characteristics with 2D seismic pre-stack time migration of North Bali Waters

Sufajar

Manik

Nainggolan³

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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“…Proses dekonvolusi dilakukan untuk menganalisis autokorelasi sehingga mendapatkan parameter prediction distance dan operator length. Lalu ada proses F-k filter yang mana proses ini dilakukan untuk memisahkan antara noise dan sinyal pada data seismik dalam domain frekuensi dan gelombang (Yuza et al, 2020)…”

Section: Pengolahan Dataunclassified

Penerapan Metode Migrasi Beda Hingga Pada Data Seismik Post Stack Di Utara Laut Bali Perairan Utara Bali

Rahman,

Sailah,

Nainggolan

2023

J. Ilmu dan Teknologi Kelautan Tropis

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Data seismik lapangan yang diperoleh dalam survei kelautan di Utara Laut Bali memiliki struktur geologi yang kompleks, seperti kontur dasar laut yang datar dan kemiringan curam serta variasi kecepatan yang tegak lurus terhadap arah pergerakan (kecepatan lateral). Kajian ini bertujuan untuk menerapkan algoritma yang berbeda yaitu migrasi beda hingga fast explicit, steep dip dan implicit sehingga didapatkan algoritma terbaik dalam menghasilkan citra penampang seismik termigrasi yang akurat dengan penempatan posisi titik refleksi sebenarnya pada struktur miring. Metode beda hingga merupakan suatu tahapan pengolahan data seismik yang digunakan untuk mencari operator diferensial dalam persamaan gelombang secara eksplisit dan implisit. Hal ini dilakukan setelah melalui tahapan kecepatan stacking untuk selanjutnya menghasilkan model kecepatan interval dari waktu tempuh gelombang seismik dalam kedalaman interval (Vint) yang dibutuhkan dalam proses beda hingga. Algoritma migrasi beda hingga Post-stack Implicit dalam domain waktu menunjukkan citra penampang seismik termigrasi paling akurat dengan penurunan derau berdasarkan hasil frekuensi bandpass. Algoritma tersebut meningkatkan rasio sinyal terhadap derau dan kualitas penampang seismik termigrasi.

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“…The raw marine seismic data (SEG-D extension) on entering into a database of ProMAX 2D software needs to be pre-processed in several stages, which include geometry check, trace editing, true amplitude recovery (TAR) surface wave attenuation, deconvolution, and F-k filtering [5]. At the first stage of preprocessing raw seismic data is arranged into data shot gather data on ProMAX 2D software.…”

Section: Pre-processingmentioning

confidence: 99%

Attenuation of long period multiple using F-k filter and surface-related multiple elimination methods on 2D broadband seismic data from Morowali Waters, Sulawesi

Situmeang

Manik

Nainggolan³

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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Wide range frequency bandwidth on seismic data is a necessity due to its close relation to resolution and depth of target. High-frequency seismic waves provide high-resolution imaging that defines thin bed layers in shallow sediment, while low-frequency seismic waves can penetrate into deeper target depth. As a result of broadband seismic technology, its wide range of frequency bandwidth is a suitable geophysical exploration method in the oil and gas industry. A major obstacle that is frequently found in marine seismic data acquisition is the existence of multiples. Short period multiple and reverberation are commonly attenuated by the predictive deconvolution method on prestack data. Advanced methods are needed to suppress long period multiple in marine seismic data. The 2D broadband marine seismic data from deep Morowali Waters, Sulawesi, contains both short and long period multiples. The predictive deconvolution, which is applied to the processing sequences, successfully eliminates short period multiple on prestack data. The combination of F-k filter and Surface Related Multiple Elimination (SRME) methods are successful in attenuating long period multiple of the 2D broadband marine seismic data. The Prestack Time Migration section shows fine resolution of seismic images.

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Multiple attenuation methods in short-offset 2D marine seismic data: a case study in Cendrawasih Bay

Cited by 4 publications

References 3 publications

Identification of gas hydrate on bottom-simulating reflector characteristics with 2D seismic pre-stack time migration of North Bali Waters

Identification of gas hydrate on bottom-simulating reflector characteristics with 2D seismic pre-stack time migration of North Bali Waters

Penerapan Metode Migrasi Beda Hingga Pada Data Seismik Post Stack Di Utara Laut Bali Perairan Utara Bali

Attenuation of long period multiple using F-k filter and surface-related multiple elimination methods on 2D broadband seismic data from Morowali Waters, Sulawesi

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