| Popis: |
Aiming at the problem of thin bed recognition in the thin interbed reservoir of the middle-shallow strata in the Songliao Basin, the broad frequency band and ultra high resolution seismic processing technique is studied. After the technique being applied in 3D seismic area of Zhaoyuan in the northern part of Songliao Basin, the seismic resolution increases 2-3 times compared with conventional seismic. It is known that characteristic of AVF is existed in seismic reflection through analyzing broad frequency band and high resolution seismic data and understanding characteristic of amplitude and frequency tuning effect of which originates from thin bed reservoir seismic reflection wave, two methods are given. One is that thickness of thin bed reservoir is calculated by AVF analysis, the other is that the distribution of thin bed reservoir is predicted by using proper broad frequency band and high resolution seismic. Through the fine contrast between seismic and wells data, the top and bottom interface of the F-2 pay zone are made sure. According to the results of seismic interpretation, the technique of seismic attributes extraction along stratum interface and 3D visualization technique are used to predict the horizontal distribution of reservoir on the F-2 pay zone. Taking the prediction result as basis, the applications on optimizing the location of the exploration wells, optimizing the zone of production test and analyzing the continuity of pay zone between the production wells are studied. They demonstrate the advantage of the high resolution seismic in the thin interbed reservoir prediction and the seismic recognition of lithologic reservoir. |
