탄성파 간섭파를 이용한 가상 음원모음 연구 (Study On Virtual Shot Gather Using Seismic Interferometry)

서지정보

· 발행기관 : 조선대학교 공학기술연구원
· 수록지 정보 : 공학기술논문지 / 10권 / 1호 / 53 ~ 58페이지
· 저자명 : 고진석, 장성형

초록

Seismic coda wave is the tail part of recorded seismogram which are the strongly scattered in inhomogeneous media. The cross-correlation of two signals from different receivers in the same domain are used to find out impulse response. For imaging subsurface, we can use the impulse response. In this study we calculated cross-correlation and virtual source gathers using seismic coda wave for synthetic and field data. For the synthetic data we use an ocean bottom seismic model (OBS). In order to make a virtual shot gather we define the first trace of the synthetic data from OBS model as a virtual source and performed the cross-correlation of the virtual source and every shot gather. For application of field data set, we choose a data set which it has the high amplitudes (Bottom Simulating Reflection: BSR) and made cross-correlation gathers and virtual source section. The gas zone on the stack image is shown in the cross-correlation section and the BSR on the stack image is also shown strong reflection amplitudes on the virtual shot gather.

영어초록

Seismic coda wave is the tail part of recorded seismogram which are the strongly scattered in inhomogeneous media. The cross-correlation of two signals from different receivers in the same domain are used to find out impulse response. For imaging subsurface, we can use the impulse response. In this study we calculated cross-correlation and virtual source gathers using seismic coda wave for synthetic and field data. For the synthetic data we use an ocean bottom seismic model (OBS). In order to make a virtual shot gather we define the first trace of the synthetic data from OBS model as a virtual source and performed the cross-correlation of the virtual source and every shot gather. For application of field data set, we choose a data set which it has the high amplitudes (Bottom Simulating Reflection: BSR) and made cross-correlation gathers and virtual source section. The gas zone on the stack image is shown in the cross-correlation section and the BSR on the stack image is also shown strong reflection amplitudes on the virtual shot gather.

참고자료

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