Pre-stack Depth Migration And Application Of Dual-sensor Seismic Data

Oil and other petrochemical energy is the foundation of modern industry.It is the unrenewable resource of the earth.It has strategic significance for the survival and development of the country.Seismic exploration is the main way to search for oil and gas.Most of the Non-outcrop oil and gas resources in the world are discovered by seismic exploration.At the present stage,the seismic exploration workers not only satisfy the interpretation of underground structures,but also tend to interpret the underground lithology.Lithological exploration requires not only the kinematic characteristics of seismic waves,but also the dynamic characteristics of seismic waves to analyze the physical properties of underground rocks.The acoustic wave equation is the accurate mathematical description of the reflection wave in space,and the pre-stack migration technique based on the accurate total acoustic wave equation is the cornerstone of the current lithological exploration.Dual-sensor seismic data is receive seismic wave field information of the same type of sensor at different depths,provide sufficient boundary conditions for solving the acoustic equation in depth domain,and is the necessary condition for using the pre-stack depth preserving migration imaging of the full acoustic wave equation,which lays a theoretical foundation for lithological exploration.The main achievements of this paper are as follows: According to the characteristics of the full wave equation,this paper fully excavates the information of Dual-sensor seismic data,and form a matching pre-stack depth migration algorithm.It is proved that Dual-sensor seismic data imaging technology has better amplitude retention from the numerical simulation and the practical data application.There are 3main parts: 1)It's beneficial to the numerical simulation experiment.From the two aspects of the structure position and the amplitude preserving property,Dual-sensor seismic data migration and the traditional imaging are compared respectively,and the accuracy and the amplitude preserving property of Dual-sensor seismic data migration are obtained.2)It's found that the phase amplitude relationship between Dual-sensor seismic data can be used as the standard for the quality of Dual-sensor seismic data.3)To deal with Dual-sensor seismic data,the effective solution of the small step long wave field extension is put forward in view of the serious interference to the vertical derivative of the seismic data,and the good imaging results are obtained,and the practicality of Dual-sensor seismic data imaging technology is verified.