The Application of High Resolution Multichannel Seismic System With Small Group Interval to Stratigraphic Exploration in Bohai Strait

The Bohai Strait is located between the Liaodong Peninsula and the Shandong Peninsula, with the shortest distance of about 106 km from north to south along the strait. The trans-strait passage project has been under discussion for many years. In order to investigate the thickness of Quaternary sediments and fault distribution of the proposed trans-strait passage area of the Bohai Strait, we performed a multi-channel seismic reflection exploration survey in the sea area. Based on the experiments of comparing different source of energy, such as 1000 J, 2000 J, 3000 J, 4000 J and 5000 J, the field acquisition parameters were determined. The multi-channel seismic acquisition system includes an electrical sparker with a maximum energy is 5 000 J, and a 24 channel seismic streamer with a group interval of 3.125 m. In order to eliminate noise and multiples, a set of seismic data processing methods suitable for the study area was determined, and a high-resolution seismic profile was obtained with a resolution better than 1.0 m. This data can provide a reference for subsequent geological interpretation and geological suggestions for the construction of the trans-strait passage project.