Abstract: The present disclosure relates to a carbon dioxide monitoring system using a subsea optical cable. The system includes an optical cable laid on a seafloor of a carbon dioxide storage site, a fixed continuous seismic source configured to generate a sweep signal by applying continuous vibration at a fixed position, and a seismic receiver installed near the seismic source to directly receive the sweep signal. An interrogator irradiates the optical cable with laser light and receives backscattered-light signals from points along the optical cable to implement distributed acoustic sensing. A signal conversion unit converts the backscattered-light signals into impulse-response converted signals through sweep deconvolution. Thus, although exploration is performed using a continuous seismic source, signal processing enables acquisition of data equivalent to that obtained using an impulse-type seismic source. The system enables monitoring of reservoir conditions associated with carbon dioxide injection.

Abstract: Provided are a system for acquiring chirp data for profiling the shallow sedimentary layers and a method for acquiring chirp data using the same, and more particularly, a system for acquiring chirp data which includes a new apparatus capable of recording chirp raw data and manufactures a high-resolution raw section preserving polarity and phase information using the recorded chirp raw data to enhance continuity and resolution of the sedimentary layers and a method for acquiring chirp data using the same.

Abstract: Provided are a system for acquiring chirp data for profiling the shallow sedimentary layers and a method for acquiring chirp data using the same, and more particularly, a system for acquiring chirp data which includes a new apparatus capable of recording chirp raw data and manufactures a high-resolution raw section preserving polarity and phase information using the recorded chirp raw data to enhance continuity and resolution of the sedimentary layers and a method for acquiring chirp data using the same.