Application of 90° phase data in lithologic interpretation
Chen Chunji1, Feng Shimin2, Mo Aling3, Li Jianhua1, Xing Hongge1, Liu Yaqin1, Wang Gui-yan1, Zhen Hongmei4
1. BGP Geological Research Center,CNPC,Zhuozhou,Hebei 072751,China;
2. Hebei Provincial Bureau of Coal Geology,Xingtai,Hebei 054000,China;
3. Geophysical Research Institute,BGP Inc.,CNPC,Zhuozhou,Hebei 072751,China;
4. Development and Production Seismic Division,BGP Inc.,Zhuozhou,Hebei 072751,China
Abstract:This paper briefly describes the principle of 90° phase data interpretation.Through the synthetic data we success to identify seismically thin beds in lithologic interpretation of 90° phase data,and describe the implementing procedure of 90° phase shift method.For real seismic data,we use the Wiener-Levinson mixed phase extraction method to estimate the seismic wavelet phase and use the phase shift method to convert the mixed phase to zero phase,and then convert to 90° phase.Finally we propose an idea to interpret thin beds by application of 90° phase data.Throughr the practical applications,we can confirm the advantage of 90° phase data in thin-bed interpretation.