Application of multichannel seismic reflection method to measure temperature in Sulawesi Sea

2nd International Conference on Marine Science: Better Insight for the Healthy Ocean

Fajaryanti, R.^1 ; Manik, H.M.^1 ; Purwanto, C.^2

Department of Marine and Science Techology, Bogor Agricultural University, Gedung Marine Center, FPIK, IPB, Jl. Agatis, No.1, Bogor

16680, Indonesia^1

Marine Geological Institute of Indonesia, Jl. Dr. Djunjunan No.236, Pasteur- Bandung

40174, Indonesia^2

关键词: Fine structures;    Horizontal resolution;    Multi-channel seismic;    Oceanographic surveys;    Physical oceanography;    Seismic data processing;    Synthetic seismogram;    Vertical sampling;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/176/1/012044/pdf
DOI  :  10.1088/1755-1315/176/1/012044

来源: IOP

【 摘 要 】

Seismic oceanography is integrated discipline between seismology and physical oceanography that can be used to investigate phenomenon in water column. Seismic oceanography displays fine structure of water column seismically and in wide range. The aim of this research was to measure temperature in Sulawesi Sea with CTD and seismic data. The benefits of this research were to create integrity and effectiveness in seismic and oceanographic surveys as well as to help develop OTEC (Ocean Thermal Energy Conversion) studies in Indonesia. The acquisition of seismic and CTD data in line 17 Sulawesi Sea conducted by P3GL on Mei-Juni 2016. Data processing was conducted in Februari-April 2017 and divided into three processes: seismic data processing using ProMax 2D software, synthetic seismogram processing using Hampson-Russell software, and mapping temperature using Ocean Data View software. The results showed that temperature in Sulawesi Sea based on CTD data ranged 4.7-30.3 °C, and temperature based on the sesimic data ranged 4.49-30.29 °C. This difference occured due to difference in vertical sampling between CTD and sound velocity semblance. Acoustic impedance in Sulawesi Sea ranged 1.529-1.578 MRy. Vertical and horizontal resolution of seismic data in this research were 6.3 m and 93.5 m, respectively. It's well established that sound velocity the main contribution to acoustic impedance. Correlation between seismic field with synthetic seismogram from CTD data is 0.7.