Analysis on the Frequency Expansion Seismic Processing Technology in TA112 Field with Vibration

摘要

The single layer of the sand body in TA112 field is thin, changing, and complex. Therefore, to accurately predict sand body by using seismic data, the frequency band of it is narrowed with HFE algorithm, the pre-stack data of low dominant frequency is expanded in frequency. The dominant frequency is increased from 45 Hz to 75 Hz, and the bandwidth is expanded from 10 Hz～65 Hz to 10 Hz～125 Hz. Through a comprehensive interpretation on seismic and geological data, the vertical resolution of seismic data, the vertical fitness to sand body, the fitness to the plane distributed sand body, the fitness to the evolution law of sand body are verified and checked. As a result, it is known that pre-stack frequency expansion seismic data is of clear geological significance and can better reflect the changing law of sand groups, and also it is better than the data before frequency expansion and can meet the needs of the oil field exploration and development to a certain extent.