Application Of Radon Transform In Stereoscopic Survey Data Processing

Marine seismic surveys, such as marine streamer, OBS, OBC and vertical cable have their own advantages in the offshore oil and gas exploration, underwater target detection, underwater disaster monitoring and other fields. The stereoscopic survey combined with two or more of them can survey stratum in real-time and can realize three-dimensional imaging and 4D underground exploration. It has advantages of high signal to noise ratio, high resolution, multi-component acquisition and high-efficiency operation. Stereoscopic survey requires wave field separation before further processing. Radon Transform (RT) has wide application effect on seismic data processing. Therefore, it is important to study on stereoscopic survey data processing using Radon Transform.This paper analyzes technical features of OBC, OBS, vertical cable and characteristics of seismic wave field and pick up the relevant seismic information on the OBS data. It introduces the basic principles and the high-resolution Radon transform in the frequency domain and analyzes the end effect and truncation effect. Then Radon transform is applied on seismic data reconstruction.Seabed is an important interface between solid and liquid. Therefore, there are a variety of types of waves near the seabed surface. Numerical simulation results show the existence of Stoneley wave and glide wave. They are picked up from seismic wave field snapshots and seismic record. It analyzes their features according to seismic wave dynamics. It studies the relationship of Stoneley wave energy with physical parameters of solid elastic medium, motivating distance and motivating frequencies by controlling the variable method in OBC and OBS survey. Then separating wave field by Radon Transform and there is a statistical data about the energy of wave field. It gives a qualitative varied curve of the ratio between Stoneley wave energy and direct wave energy. Seismic record with deep-towed seismic source is simulated. There is strong energy of Stoneley wave and ghost. Radon transform is used to suppress the energy. The method is summarized.Finally, RT is applied to suppress multiples. Then according to the characteristics of stereoscopic survey, models are constructed for horizontally layered medium media and tilt media. Then vertical cable is used to survey, and the corresponding seismic record is obtained. Seismic data is transformed to Radon domain by RT, the upward and downward wave energy is well separated in the Radon domain. Remove one, and obtain another. They verify the validity of RT in stereoscopic observations processing.