Wu Yong1,4, Nie Kai-xuan2, Ren Jin-li3, Qin Jian-xun1, Li Ai-jun1, Wang Jian-zhu1, Li Yan-xin1
1. The Second Oil Production Plant of Dagang Oilfield, Huanghua, Hebei,061103, China;
2. Beijing Zhongyoujiya Science and Technology Development Co.Ltd, Beijing. 100101, China;
3. Geophysical and Geochemical Exploration Team of the Shaanxi Bureau of Geology and Mineral Resources,Xi'an, Shaanxi, 710043, China
Abstract：The seismic frequency-extension technology studies thin-layer changes in small time window from spectrum analysis.Reservoir lateral changes in frequency domain are found by tuning amplitude or phase,and different scale geo-bodies are identified by response characteristics of different frequencies.This technology can help us identify thin layer with thickness less than 1/4 wavelength.We extract a few seismic attributes,including instantaneous frequency,instantaneous phase,root-mean-square amplitude,phase cosine and so on.Our study shows that the frequency-extension attributes are very sensitive to main oil sands,especially to thickness changes of oil sands of Shahejie formation between Wells BS6-BS8.And our predictions match well with the results of the new drilled Wells B35,B38,B39,and B27.
